<?xml version="1.0" encoding="UTF-8"?>

<!--XBRL Document Created with the Workiva Platform-->
<!--Copyright 2026 Workiva-->
<!--r:019e9381-66e0-76c9-88c3-69f2c3721804,g:cb125896-8b70-4e03-9d93-f303b8118907-->
<xs:schema xmlns:xs="http://www.w3.org/2001/XMLSchema" xmlns:link="http://www.xbrl.org/2003/linkbase" xmlns:smr="http://www.nuscalepower.com/20260630" xmlns:xbrli="http://www.xbrl.org/2003/instance" xmlns:dtr-types="http://www.xbrl.org/dtr/type/2024-01-31" xmlns:xbrldt="http://xbrl.org/2005/xbrldt" attributeFormDefault="unqualified" elementFormDefault="qualified" targetNamespace="http://www.nuscalepower.com/20260630">
  <xs:import namespace="http://fasb.org/srt/2026" schemaLocation="https://xbrl.fasb.org/srt/2026/elts/srt-2026.xsd"/>
  <xs:import namespace="http://fasb.org/us-gaap/2026" schemaLocation="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd"/>
  <xs:import namespace="http://www.xbrl.org/2003/instance" schemaLocation="http://www.xbrl.org/2003/xbrl-instance-2003-12-31.xsd"/>
  <xs:import namespace="http://www.xbrl.org/2003/linkbase" schemaLocation="http://www.xbrl.org/2003/xbrl-linkbase-2003-12-31.xsd"/>
  <xs:import namespace="http://www.xbrl.org/dtr/type/2024-01-31" schemaLocation="https://www.xbrl.org/dtr/type/2024-01-31/types.xsd"/>
  <xs:import namespace="http://xbrl.org/2005/xbrldt" schemaLocation="http://www.xbrl.org/2005/xbrldt-2005.xsd"/>
  <xs:import namespace="http://xbrl.sec.gov/dei/2026" schemaLocation="https://xbrl.sec.gov/dei/2026/dei-2026.xsd"/>
  <xs:import namespace="http://xbrl.sec.gov/ecd/2026" schemaLocation="https://xbrl.sec.gov/ecd/2026/ecd-2026.xsd"/>
  <xs:annotation>
    <xs:appinfo>
      <link:linkbaseRef xmlns:xlink="http://www.w3.org/1999/xlink" xlink:arcrole="http://www.w3.org/1999/xlink/properties/linkbase" xlink:href="smr-20260630_pre.xml" xlink:role="http://www.xbrl.org/2003/role/presentationLinkbaseRef" xlink:type="simple"/>
      <link:linkbaseRef xmlns:xlink="http://www.w3.org/1999/xlink" xlink:arcrole="http://www.w3.org/1999/xlink/properties/linkbase" xlink:href="smr-20260630_def.xml" xlink:role="http://www.xbrl.org/2003/role/definitionLinkbaseRef" xlink:type="simple"/>
      <link:linkbaseRef xmlns:xlink="http://www.w3.org/1999/xlink" xlink:arcrole="http://www.w3.org/1999/xlink/properties/linkbase" xlink:href="smr-20260630_lab.xml" xlink:role="http://www.xbrl.org/2003/role/labelLinkbaseRef" xlink:type="simple"/>
      <link:linkbaseRef xmlns:xlink="http://www.w3.org/1999/xlink" xlink:arcrole="http://www.w3.org/1999/xlink/properties/linkbase" xlink:href="smr-20260630_cal.xml" xlink:role="http://www.xbrl.org/2003/role/calculationLinkbaseRef" xlink:type="simple"/>
      <link:roleType id="Cover" roleURI="http://www.nuscalepower.com/role/Cover">
        <link:definition>0000001 - Document - Cover</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="CondensedConsolidatedBalanceSheetUnaudited" roleURI="http://www.nuscalepower.com/role/CondensedConsolidatedBalanceSheetUnaudited">
        <link:definition>9952151 - Statement - Condensed Consolidated Balance Sheet (Unaudited)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="CondensedConsolidatedBalanceSheetUnauditedParenthetical" roleURI="http://www.nuscalepower.com/role/CondensedConsolidatedBalanceSheetUnauditedParenthetical">
        <link:definition>9952152 - Statement - Condensed Consolidated Balance Sheet (Unaudited) (Parenthetical)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="CondensedConsolidatedStatementsofOperationsUnaudited" roleURI="http://www.nuscalepower.com/role/CondensedConsolidatedStatementsofOperationsUnaudited">
        <link:definition>9952153 - Statement - Condensed Consolidated Statements of Operations (Unaudited)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="CondensedConsolidatedStatementsofOperationsUnauditedParenthetical" roleURI="http://www.nuscalepower.com/role/CondensedConsolidatedStatementsofOperationsUnauditedParenthetical">
        <link:definition>9952154 - Statement - Condensed Consolidated Statements of Operations (Unaudited) (Parenthetical)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="CondensedConsolidatedStatementsofChangesinStockholdersEquityUnaudited" roleURI="http://www.nuscalepower.com/role/CondensedConsolidatedStatementsofChangesinStockholdersEquityUnaudited">
        <link:definition>9952155 - Statement - Condensed Consolidated Statements of Changes in Stockholders&#8217; Equity (Unaudited)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="CondensedConsolidatedStatementsofCashFlowsUnaudited" roleURI="http://www.nuscalepower.com/role/CondensedConsolidatedStatementsofCashFlowsUnaudited">
        <link:definition>9952156 - Statement - Condensed Consolidated Statements of Cash Flows&#160; (Unaudited)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="CondensedConsolidatedStatementsofCashFlowsUnauditedParenthetical" roleURI="http://www.nuscalepower.com/role/CondensedConsolidatedStatementsofCashFlowsUnauditedParenthetical">
        <link:definition>9952157 - Statement - Condensed Consolidated Statements of Cash Flows&#160; (Unaudited) (Parenthetical)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="NatureofBusiness" roleURI="http://www.nuscalepower.com/role/NatureofBusiness">
        <link:definition>9952158 - Disclosure - Nature of Business</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="SummaryofSignificantAccountingPolicies" roleURI="http://www.nuscalepower.com/role/SummaryofSignificantAccountingPolicies">
        <link:definition>9952159 - Disclosure - Summary of Significant Accounting Policies</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="EquityandLossPerShare" roleURI="http://www.nuscalepower.com/role/EquityandLossPerShare">
        <link:definition>9952160 - Disclosure - Equity and Loss Per Share</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="FairValueMeasurement" roleURI="http://www.nuscalepower.com/role/FairValueMeasurement">
        <link:definition>9952161 - Disclosure - Fair Value Measurement</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="AccountsandOtherReceivables" roleURI="http://www.nuscalepower.com/role/AccountsandOtherReceivables">
        <link:definition>9952162 - Disclosure - Accounts and Other Receivables</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="Leases" roleURI="http://www.nuscalepower.com/role/Leases">
        <link:definition>9952163 - Disclosure - Leases</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="PropertyPlantandEquipment" roleURI="http://www.nuscalepower.com/role/PropertyPlantandEquipment">
        <link:definition>9952164 - Disclosure - Property, Plant and Equipment</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="LongLeadMaterialWorkInProcess" roleURI="http://www.nuscalepower.com/role/LongLeadMaterialWorkInProcess">
        <link:definition>9952165 - Disclosure - Long-Lead Material Work In Process</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="PartnershipMilestonesAgreementwithENTRA1" roleURI="http://www.nuscalepower.com/role/PartnershipMilestonesAgreementwithENTRA1">
        <link:definition>9952166 - Disclosure - Partnership Milestones Agreement with ENTRA1</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="SegmentInformation" roleURI="http://www.nuscalepower.com/role/SegmentInformation">
        <link:definition>9952167 - Disclosure - Segment Information</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="Revenue" roleURI="http://www.nuscalepower.com/role/Revenue">
        <link:definition>9952168 - Disclosure - Revenue</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="EmployeeBenefits" roleURI="http://www.nuscalepower.com/role/EmployeeBenefits">
        <link:definition>9952169 - Disclosure - Employee Benefits</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="IncomeTaxes" roleURI="http://www.nuscalepower.com/role/IncomeTaxes">
        <link:definition>9952170 - Disclosure - Income Taxes</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="EquityBasedCompensation" roleURI="http://www.nuscalepower.com/role/EquityBasedCompensation">
        <link:definition>9952171 - Disclosure - Equity-Based Compensation</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="RelatedPartyTransactions" roleURI="http://www.nuscalepower.com/role/RelatedPartyTransactions">
        <link:definition>9952172 - Disclosure - Related Party Transactions</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="CommitmentsandContingencies" roleURI="http://www.nuscalepower.com/role/CommitmentsandContingencies">
        <link:definition>9952173 - Disclosure - Commitments and Contingencies</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="SummaryofSignificantAccountingPoliciesPolicies" roleURI="http://www.nuscalepower.com/role/SummaryofSignificantAccountingPoliciesPolicies">
        <link:definition>9955511 - Disclosure - Summary of Significant Accounting Policies (Policies)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="EquityandLossPerShareTables" roleURI="http://www.nuscalepower.com/role/EquityandLossPerShareTables">
        <link:definition>9955512 - Disclosure - Equity and Loss Per Share (Tables)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="FairValueMeasurementTables" roleURI="http://www.nuscalepower.com/role/FairValueMeasurementTables">
        <link:definition>9955513 - Disclosure - Fair Value Measurement (Tables)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="LeasesTables" roleURI="http://www.nuscalepower.com/role/LeasesTables">
        <link:definition>9955514 - Disclosure - Leases (Tables)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="PropertyPlantandEquipmentTables" roleURI="http://www.nuscalepower.com/role/PropertyPlantandEquipmentTables">
        <link:definition>9955515 - Disclosure - Property, Plant and Equipment (Tables)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="RevenueTables" roleURI="http://www.nuscalepower.com/role/RevenueTables">
        <link:definition>9955516 - Disclosure - Revenue (Tables)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="CommitmentsandContingenciesTables" roleURI="http://www.nuscalepower.com/role/CommitmentsandContingenciesTables">
        <link:definition>9955517 - Disclosure - Commitments and Contingencies (Tables)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="NatureofBusinessDetails" roleURI="http://www.nuscalepower.com/role/NatureofBusinessDetails">
        <link:definition>9955518 - Disclosure - Nature of Business (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="SummaryofSignificantAccountingPoliciesDetails" roleURI="http://www.nuscalepower.com/role/SummaryofSignificantAccountingPoliciesDetails">
        <link:definition>9955519 - Disclosure - Summary of Significant Accounting Policies (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="EquityandLossPerShareScheduleofNonControllingInterestsDetails" roleURI="http://www.nuscalepower.com/role/EquityandLossPerShareScheduleofNonControllingInterestsDetails">
        <link:definition>9955520 - Disclosure - Equity and Loss Per Share - Schedule of Non-Controlling Interests (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="EquityandLossPerShareNarrativeDetails" roleURI="http://www.nuscalepower.com/role/EquityandLossPerShareNarrativeDetails">
        <link:definition>9955521 - Disclosure - Equity and Loss Per Share - Narrative (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="EquityandLossPerShareBasicandDilutedLossPerShareDetails" roleURI="http://www.nuscalepower.com/role/EquityandLossPerShareBasicandDilutedLossPerShareDetails">
        <link:definition>9955522 - Disclosure - Equity and Loss Per Share - Basic and Diluted Loss Per Share (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="FairValueMeasurementScheduleofFinancialAssetsDetails" roleURI="http://www.nuscalepower.com/role/FairValueMeasurementScheduleofFinancialAssetsDetails">
        <link:definition>9955523 - Disclosure - Fair Value Measurement - Schedule of Financial Assets (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="AccountsandOtherReceivablesDetails" roleURI="http://www.nuscalepower.com/role/AccountsandOtherReceivablesDetails">
        <link:definition>9955524 - Disclosure - Accounts and Other Receivables (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="LeasesBalanceSheetClassificationofLeaseAssetsandLiabilitiesDetails" roleURI="http://www.nuscalepower.com/role/LeasesBalanceSheetClassificationofLeaseAssetsandLiabilitiesDetails">
        <link:definition>9955525 - Disclosure - Leases - Balance Sheet Classification of Lease Assets and Liabilities (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="LeasesSupplementalBalanceSheetDetails" roleURI="http://www.nuscalepower.com/role/LeasesSupplementalBalanceSheetDetails">
        <link:definition>9955526 - Disclosure - Leases - Supplemental Balance Sheet (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="LeasesRemainingLeasePaymentsDetails" roleURI="http://www.nuscalepower.com/role/LeasesRemainingLeasePaymentsDetails">
        <link:definition>9955527 - Disclosure - Leases - Remaining Lease Payments (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="LeasesRemainingLeasePaymentsDetails_1" roleURI="http://www.nuscalepower.com/role/LeasesRemainingLeasePaymentsDetails_1">
        <link:definition>9955527 - Disclosure - Leases - Remaining Lease Payments (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="LeasesNarrativeDetails" roleURI="http://www.nuscalepower.com/role/LeasesNarrativeDetails">
        <link:definition>9955528 - Disclosure - Leases - Narrative (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="PropertyPlantandEquipmentScheduleofPropertyPlantandEquipmentDetails" roleURI="http://www.nuscalepower.com/role/PropertyPlantandEquipmentScheduleofPropertyPlantandEquipmentDetails">
        <link:definition>9955529 - Disclosure - Property, Plant and Equipment - Schedule of Property, Plant and Equipment (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="PropertyPlantandEquipmentNarrativeDetails" roleURI="http://www.nuscalepower.com/role/PropertyPlantandEquipmentNarrativeDetails">
        <link:definition>9955530 - Disclosure - Property, Plant and Equipment - Narrative (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="PropertyPlantandEquipmentNarrativeDetails_1" roleURI="http://www.nuscalepower.com/role/PropertyPlantandEquipmentNarrativeDetails_1">
        <link:definition>9955530 - Disclosure - Property, Plant and Equipment - Narrative (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="LongLeadMaterialWorkInProcessDetails" roleURI="http://www.nuscalepower.com/role/LongLeadMaterialWorkInProcessDetails">
        <link:definition>9955531 - Disclosure - Long-Lead Material Work In Process (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="PartnershipMilestonesAgreementwithENTRA1Details" roleURI="http://www.nuscalepower.com/role/PartnershipMilestonesAgreementwithENTRA1Details">
        <link:definition>9955532 - Disclosure - Partnership Milestones Agreement with ENTRA1 (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="SegmentInformationDetails" roleURI="http://www.nuscalepower.com/role/SegmentInformationDetails">
        <link:definition>9955533 - Disclosure - Segment Information (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="RevenueScheduleofDisaggregationofRevenueDetails" roleURI="http://www.nuscalepower.com/role/RevenueScheduleofDisaggregationofRevenueDetails">
        <link:definition>9955534 - Disclosure - Revenue - Schedule of Disaggregation of Revenue (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="RevenueNarrativeDetails" roleURI="http://www.nuscalepower.com/role/RevenueNarrativeDetails">
        <link:definition>9955535 - Disclosure - Revenue - Narrative (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="EmployeeBenefitsDetails" roleURI="http://www.nuscalepower.com/role/EmployeeBenefitsDetails">
        <link:definition>9955536 - Disclosure - Employee Benefits (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="IncomeTaxesDetails" roleURI="http://www.nuscalepower.com/role/IncomeTaxesDetails">
        <link:definition>9955537 - Disclosure - Income Taxes (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="EquityBasedCompensationDetails" roleURI="http://www.nuscalepower.com/role/EquityBasedCompensationDetails">
        <link:definition>9955538 - Disclosure - Equity-Based Compensation (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="RelatedPartyTransactionsDetails" roleURI="http://www.nuscalepower.com/role/RelatedPartyTransactionsDetails">
        <link:definition>9955539 - Disclosure - Related Party Transactions (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="CommitmentsandContingenciesNarrativeDetails" roleURI="http://www.nuscalepower.com/role/CommitmentsandContingenciesNarrativeDetails">
        <link:definition>9955540 - Disclosure - Commitments and Contingencies - Narrative (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="CommitmentsandContingenciesScheduleofPrincipalCashObligationsandCommitmentsDetails" roleURI="http://www.nuscalepower.com/role/CommitmentsandContingenciesScheduleofPrincipalCashObligationsandCommitmentsDetails">
        <link:definition>9955541 - Disclosure - Commitments and Contingencies - Schedule of Principal Cash Obligations and Commitments (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
    </xs:appinfo>
  </xs:annotation>
  <xs:element id="smr_InProcessResearchAndDevelopment" abstract="false" name="InProcessResearchAndDevelopment" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="smr_InventoryWorkInProcessNoncurrent" abstract="false" name="InventoryWorkInProcessNoncurrent" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="smr_DepartmentOfEnergyCostShare" abstract="false" name="DepartmentOfEnergyCostShare" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="smr_StockIssuedDuringPeriodSharesExerciseOfCommonShareOptionsAndVestedRSUs" abstract="false" name="StockIssuedDuringPeriodSharesExerciseOfCommonShareOptionsAndVestedRSUs" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:sharesItemType"/>
  <xs:element id="smr_StockIssuedDuringPeriodValueExerciseOfCommonShareOptionsAndVestedRSUs" abstract="false" name="StockIssuedDuringPeriodValueExerciseOfCommonShareOptionsAndVestedRSUs" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="smr_ExchangeOfCombinedInterestsIntoClassACommonStockShares" abstract="false" name="ExchangeOfCombinedInterestsIntoClassACommonStockShares" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:sharesItemType"/>
  <xs:element id="smr_RebalancingOfOwnershipPercentageBetweenControllingAndTheNoncontrollingInterests" abstract="false" name="RebalancingOfOwnershipPercentageBetweenControllingAndTheNoncontrollingInterests" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="smr_ForeignIncomeTaxWithholdingToNoncontrollingInterests" abstract="false" name="ForeignIncomeTaxWithholdingToNoncontrollingInterests" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="smr_LongLeadMaterialWorkInProcess" abstract="false" name="LongLeadMaterialWorkInProcess" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="smr_IncreaseDecreaseInLongLeadMaterialLiability" abstract="false" name="IncreaseDecreaseInLongLeadMaterialLiability" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="smr_IncreaseDecreaseInRightOfUseAssetsAndLeaseLiability" abstract="false" name="IncreaseDecreaseInRightOfUseAssetsAndLeaseLiability" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="smr_ProceedsFromIssuanceOfCommonStockNetOfIssuanceFees" abstract="false" name="ProceedsFromIssuanceOfCommonStockNetOfIssuanceFees" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="smr_InvestmentsThatConvertedInToShortTermInvestments" abstract="false" name="InvestmentsThatConvertedInToShortTermInvestments" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="smr_AccruedForeignIncomeTaxWithholdingToNoncontrollingInterests" abstract="false" name="AccruedForeignIncomeTaxWithholdingToNoncontrollingInterests" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="smr_NoncontrollingInterestAndLossPerShareAbstract" abstract="true" name="NoncontrollingInterestAndLossPerShareAbstract" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:stringItemType"/>
  <xs:element id="smr_NoncontrollingInterestDisclosureAndEarningsPerShareTextBlock" abstract="false" name="NoncontrollingInterestDisclosureAndEarningsPerShareTextBlock" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:textBlockItemType"/>
  <xs:element id="smr_ScheduleOfNonControllingInterestsTableTextBlock" abstract="false" name="ScheduleOfNonControllingInterestsTableTextBlock" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:textBlockItemType"/>
  <xs:element id="smr_ScheduleOfRightOfUseLeaseAssetsAndLeaseLiabilitiesTableTextBlock" abstract="false" name="ScheduleOfRightOfUseLeaseAssetsAndLeaseLiabilitiesTableTextBlock" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:textBlockItemType"/>
  <xs:element id="smr_NumberOfMegawatts" abstract="false" name="NumberOfMegawatts" nillable="true" xbrli:periodType="instant" substitutionGroup="xbrli:item" type="dtr-types:powerItemType"/>
  <xs:element id="smr_OperatingLeaseResidualValueGuarantees" abstract="false" name="OperatingLeaseResidualValueGuarantees" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="smr_NuScaleCorpMember" abstract="true" name="NuScaleCorpMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="smr_NuScaleLLCMember" abstract="true" name="NuScaleLLCMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="smr_NoncontrollingInterestRollForward" abstract="true" name="NoncontrollingInterestRollForward" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:stringItemType"/>
  <xs:element id="smr_NoncontrollingInterestShares" abstract="false" name="NoncontrollingInterestShares" nillable="true" xbrli:periodType="instant" substitutionGroup="xbrli:item" type="xbrli:sharesItemType"/>
  <xs:element id="smr_NoncontrollingInterestExchangeOfCombinedInterestsIntoClassACommonStockShares" abstract="false" name="NoncontrollingInterestExchangeOfCombinedInterestsIntoClassACommonStockShares" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:sharesItemType"/>
  <xs:element id="smr_NoncontrollingInterestIssuanceOfClassACommonStock" abstract="false" name="NoncontrollingInterestIssuanceOfClassACommonStock" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:sharesItemType"/>
  <xs:element id="smr_NoncontrollingInterestExerciseOfOptionsAndWarrantsAndVestedRSUs" abstract="false" name="NoncontrollingInterestExerciseOfOptionsAndWarrantsAndVestedRSUs" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:sharesItemType"/>
  <xs:element id="smr_NoncontrollingInterestOwnershipPercentageRollForward" abstract="true" name="NoncontrollingInterestOwnershipPercentageRollForward" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:stringItemType"/>
  <xs:element id="smr_NoncontrollingInterestOwnershipPercentageByNoncontrollingOwners" abstract="false" name="NoncontrollingInterestOwnershipPercentageByNoncontrollingOwners" nillable="true" xbrli:periodType="instant" substitutionGroup="xbrli:item" type="dtr-types:percentItemType"/>
  <xs:element id="smr_A2026ATMProgramMember" abstract="true" name="A2026ATMProgramMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="smr_ATMProgramMember" abstract="true" name="ATMProgramMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="smr_CommonStockVotingRightPerShare" abstract="false" name="CommonStockVotingRightPerShare" nillable="true" xbrli:periodType="instant" substitutionGroup="xbrli:item" type="xbrli:integerItemType"/>
  <xs:element id="smr_SaleOfStockAuthorizedSharesValue" abstract="false" name="SaleOfStockAuthorizedSharesValue" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="smr_SaleOfStockNumberOfSharesSold" abstract="false" name="SaleOfStockNumberOfSharesSold" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:sharesItemType"/>
  <xs:element id="smr_SaleOfStockConsiderationReceivedOnTransactionGrossAmount" abstract="false" name="SaleOfStockConsiderationReceivedOnTransactionGrossAmount" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="smr_SaleOfStockWeightedAveragePricePerShare" abstract="false" name="SaleOfStockWeightedAveragePricePerShare" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:perShareItemType"/>
  <xs:element id="smr_ClassBCommonSharesMember" abstract="true" name="ClassBCommonSharesMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="smr_ShortTermInvestmentFairValueDisclosure" abstract="false" name="ShortTermInvestmentFairValueDisclosure" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="smr_LeaseRightofUseAsset" abstract="false" name="LeaseRightofUseAsset" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="smr_LesseeOperatingLeaseLiabilityLeaseIncentives" abstract="false" name="LesseeOperatingLeaseLiabilityLeaseIncentives" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="smr_DepreciablePropertyPlantAndEquipmentMember" abstract="true" name="DepreciablePropertyPlantAndEquipmentMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="smr_OfficeAndComputerEquipmentMember" abstract="true" name="OfficeAndComputerEquipmentMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="smr_CFPPLLCMember" abstract="true" name="CFPPLLCMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="smr_LongLeadMaterialContractMember" abstract="true" name="LongLeadMaterialContractMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="smr_PartnershipMilestonesAgreementMember" abstract="true" name="PartnershipMilestonesAgreementMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="smr_ContractualObligationMilestoneContributionOnePercentage" abstract="false" name="ContractualObligationMilestoneContributionOnePercentage" nillable="true" xbrli:periodType="instant" substitutionGroup="xbrli:item" type="dtr-types:percentItemType"/>
  <xs:element id="smr_ContractualObligationMilestoneContributionTwoPercentage" abstract="false" name="ContractualObligationMilestoneContributionTwoPercentage" nillable="true" xbrli:periodType="instant" substitutionGroup="xbrli:item" type="dtr-types:percentItemType"/>
  <xs:element id="smr_ContractualObligationMilestoneContributionThreePercentage" abstract="false" name="ContractualObligationMilestoneContributionThreePercentage" nillable="true" xbrli:periodType="instant" substitutionGroup="xbrli:item" type="dtr-types:percentItemType"/>
  <xs:element id="smr_ContractualObligationRenewalTerm" abstract="false" name="ContractualObligationRenewalTerm" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:durationItemType"/>
  <xs:element id="smr_PaymentOfContractualObligation" abstract="false" name="PaymentOfContractualObligation" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="smr_PowerPlantAndNPMEngineeringDesignAndLicensingServicesAndFeesMember" abstract="true" name="PowerPlantAndNPMEngineeringDesignAndLicensingServicesAndFeesMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="smr_E2CentersMember" abstract="true" name="E2CentersMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="smr_OtherMember" abstract="true" name="OtherMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="smr_DefinedContributionPlanTranchesAxis" abstract="true" name="DefinedContributionPlanTranchesAxis" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrldt:dimensionItem" type="xbrli:stringItemType"/>
  <xs:element id="smr_DefinedContributionPlanTranchesDomain" abstract="true" name="DefinedContributionPlanTranchesDomain" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="smr_DefinedContributionPlanTrancheOneMember" abstract="true" name="DefinedContributionPlanTrancheOneMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="smr_DefinedContributionPlanTrancheTwoMember" abstract="true" name="DefinedContributionPlanTrancheTwoMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="smr_RomanianTaxAuthorityMember" abstract="true" name="RomanianTaxAuthorityMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="smr_ShareBasedCompensationArrangementByShareBasedPaymentAwardNonOptionEquityInstrumentsGrantedAggregatedValue" abstract="false" name="ShareBasedCompensationArrangementByShareBasedPaymentAwardNonOptionEquityInstrumentsGrantedAggregatedValue" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="smr_RelatedPartyTransactionRevenueEarnedPercentage" abstract="false" name="RelatedPartyTransactionRevenueEarnedPercentage" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:percentItemType"/>
  <xs:element id="smr_SalesAndMarketingAgreementsMember" abstract="true" name="SalesAndMarketingAgreementsMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="smr_SupplyChainReadinessAndManufacturingMember" abstract="true" name="SupplyChainReadinessAndManufacturingMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="smr_ContractualObligationAdditionalCommitment" abstract="false" name="ContractualObligationAdditionalCommitment" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="smr_ContractualObligationExtendedPeriod" abstract="false" name="ContractualObligationExtendedPeriod" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:durationItemType"/>
  <xs:element id="smr_CostShareObligationAmount" abstract="false" name="CostShareObligationAmount" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="smr_ServiceCommitmentsAndOthersMember" abstract="true" name="ServiceCommitmentsAndOthersMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="smr_LeaseCommitmentsMember" abstract="true" name="LeaseCommitmentsMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
</xs:schema>
