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        <ProgramServicesAmt>37244</ProgramServicesAmt>
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        <EOYAmt>49636</EOYAmt>
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        <EOYAmt>1278</EOYAmt>
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      <AccountsPayableAccrExpnssGrp>
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        <EOYAmt>4250</EOYAmt>
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      <DeferredRevenueGrp>
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        <EOYAmt>78035</EOYAmt>
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      <OtherLiabilitiesGrp>
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        <EOYAmt>0</EOYAmt>
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      <TotalLiabilitiesGrp>
        <BOYAmt>104470</BOYAmt>
        <EOYAmt>82285</EOYAmt>
      </TotalLiabilitiesGrp>
      <OrganizationFollowsFASB117Ind>X</OrganizationFollowsFASB117Ind>
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        <EOYAmt>812501</EOYAmt>
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      <DonorRestrictionNetAssetsGrp>
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        <EOYAmt>137781</EOYAmt>
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      <TotalNetAssetsFundBalanceGrp>
        <BOYAmt>1047711</BOYAmt>
        <EOYAmt>950282</EOYAmt>
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      <TotLiabNetAssetsFundBalanceGrp>
        <BOYAmt>1152181</BOYAmt>
        <EOYAmt>1032567</EOYAmt>
      </TotLiabNetAssetsFundBalanceGrp>
      <ReconcilationRevenueExpnssAmt>-97429</ReconcilationRevenueExpnssAmt>
      <MethodOfAccountingAccrualInd>X</MethodOfAccountingAccrualInd>
      <AccountantCompileOrReviewInd>false</AccountantCompileOrReviewInd>
      <FSAuditedInd>false</FSAuditedInd>
      <FederalGrantAuditRequiredInd>false</FederalGrantAuditRequiredInd>
    </IRS990>
    <IRS990ScheduleC documentId="IRS990ScheduleC-01">
      <SubstantiallyAllDuesNondedInd>false</SubstantiallyAllDuesNondedInd>
      <OnlyInHouseLobbyingInd>true</OnlyInHouseLobbyingInd>
      <AgreeCarryoverPriorYearInd>false</AgreeCarryoverPriorYearInd>
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    <IRS990ScheduleD documentId="IRS990ScheduleD-01" softwareId="21013422">
      <FederalIncomeTaxLiabilityAmt>0</FederalIncomeTaxLiabilityAmt>
      <TotalLiabilityAmt>0</TotalLiabilityAmt>
      <FootnoteTextInd>X</FootnoteTextInd>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Pt X, Line 2</FormAndLineReferenceDesc>
        <ExplanationTxt>The Organization is exempt from federal income tax under Section 501(c)(6) of the Internal Revenue Code. Accordingly, no provision for income taxes is provided. The Organization has reviewed tax positions taken in filings with federal and state jurisdictions and believes those positions would be sustained should the filings be examined by the relevant taxing authority. For federal income tax purposes, the returns remain open for possible examination three years after they are filed. The Organization's policy is to recognize interest and penalties on unrecognized tax benefits in other expense in the statement of activities. No interest and penalties were recorded during the year ended September 30, 2022.</ExplanationTxt>
      </SupplementalInformationDetail>
    </IRS990ScheduleD>
    <IRS990ScheduleO documentId="IRS990ScheduleO-01" softwareId="21013422">
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Other</FormAndLineReferenceDesc>
        <ExplanationTxt>THE INSTITUTE OF NUCLEAR MATERIALS MANAGEMENT WAS FORMED IN 1958 TO ENCOURAGE THE ADVANCEMENT OF NUCLEAR MATERIALS MANAGEMENT IN ALL ITS ASPECTS, TO PROMOTE RESEARCH IN THE FIELD OF NUCLEAR MATERIALS MANAGEMENT, ESTABLISH STANDARDS AND IMPROVE THE QUALIFICATIONS OF THOSE ENGAGED IN NUCLEAR MATERIALS MANAGEMENT AND SAFEGUARDS THROUGH HIGH STANDARDS OR PROFESSIONAL ETHICS, EDUCATION, AND ATTAINMENT, THE RECOGNITION OF THOSE WHO MEET SUCH STANDARDS, AND TO INCREASE AND DISSEMINATE INFORMATION THROUGH MEETINGS, PROFESSIONAL CONTACTS, REPORTS, PAPERS, DISCUSSIONS AND PUBLICATIONS.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Pt VI, Line 3</FormAndLineReferenceDesc>
        <ExplanationTxt>INMM CONTRACTS WITH A MANAGEMENT COMPANY TO PROVIDE OFFICE FACILITIES, MANAGEMENT, ACCOUNTING, STAFFING AND SUPPORT SERVICES. THE ASSOCIATION'S MANAGEMENT FEE IS COMPARED TO DATA FROM THE ASAE BENCHMARKING SERIES PUBLICATION-OPERATING RATIO REPORT AND IS APPROVED DURING THE BUDGETED PROCESS.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Pt VI, Line 6</FormAndLineReferenceDesc>
        <ExplanationTxt>THE MEMBERSHIP OF INMM CONSISTS OF REGULAR MEMBERS, STUDENT MEMBERS, EMERITUS MEMBERS, SUSTAINING MEMBERS AND HONORARY MEMBERS IN THE FIELD OF NUCLEAR MATERIALS MANAGEMENT.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Pt VI, Line 7a</FormAndLineReferenceDesc>
        <ExplanationTxt>MEMBERS ARE SENT BALLOTS FOR THE ELECTION OF OFFICERS AND OTHER ELECTED POSITIONS.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Pt VI, Line 7b</FormAndLineReferenceDesc>
        <ExplanationTxt>MEMBERS ARE SENT BALLOTS FOR ANY PROPSOED CHANGES TO INMM BYLAWS.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Pt VI, Line 11b</FormAndLineReferenceDesc>
        <ExplanationTxt>FORM 990 IS FIRST REVIEWED BY INMM ACCOUNTING STAFF AND EXECUTIVE DIRECTOR. IT IS THEN REVIEWED BY THE INMM TREASURER AND PROVIDED TO THE OTHER MEMBERS OF THE EXECUTIVE COMMITTEE PRIOR TO FILING.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Pt VI, Line 8b</FormAndLineReferenceDesc>
        <ExplanationTxt>THE ORGANIZATION'S BOARD MEMBERS MEET REGULARLY AND TAKE THE MINUTES OF ALL MEETINGS.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Pt VI, Line 19</FormAndLineReferenceDesc>
        <ExplanationTxt>THE ORGANIZATION'S GOVERNING DOCUMENTS AND FINANCIAL STATEMENTS ARE AVAILABLE TO THE PUBLIC UPON REQUEST.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Pt VI, Line 12c</FormAndLineReferenceDesc>
        <ExplanationTxt>ALL MEMBERS OF THE BOARD OF DIRECTORS COMPLETE AN ANNUAL QUESTIONARIE.</ExplanationTxt>
      </SupplementalInformationDetail>
    </IRS990ScheduleO>
  </ReturnData>
</Return>
