ML17010A057
| ML17010A057 | |
| Person / Time | |
|---|---|
| Site: | Texas A&M University |
| Issue date: | 01/09/2017 |
| From: | Mcdeavitt S Texas A&M Univ |
| To: | Document Control Desk, Office of Nuclear Reactor Regulation |
| References | |
| 2017-0001 | |
| Download: ML17010A057 (61) | |
Text
Nuclear Science Center 1095 Nuclear Science Road, 3575 TAMU College Station, TX 77843-3575 Tel. (979) 845-7551 1
NUCLEAR SCIENCE CENTER Dr. Sean M. McDeavitt Director, TEES Nuclear Science Center Texas A&M University Texas A&M Engineering Experiment Station 1095 Nuclear Science Road, 3575 TAMU College Station, TX 77843-3575 January 9, 2017 2017-0001 Docket Number 50-59 / License No. R-23 U.S. Nuclear Regulatory Commission ATTN: Document Control Desk Washington, DC 20555 Ref: 10 CFR 50.90
SUBJECT:
Final Status Survey Report Supplemental Information for the Zachry Engineering Center Attn:
Mr. Alexander Adams Jr., Chief, Research and Test Reactors Branch Office of Nuclear Reactor Regulation Mr. Patrick M. Boyle, Project Manager, Research and Test Reactors Branch Office of Nuclear Reactor Regulation By letter dated November 21, 2016 (ADAMS Accession No. ML16326A447), as supplemented by two letters dated December 16, 2016 (ADAMS Accession Nos. ML16351A502 and ML16352A00),
Texas A&M University (TAMU) submitted a license amendment request (LAR) to Operating License No. R-23, Docket 50-59, seeking U.S. Nuclear Regulatory Commission (U.S. NRC) approval for the unrestricted release of the Zachry Engineering Center located on the TAMU Campus. The approval of this LAR will result in the removal of the Zachry Engineering Center site from the R-23 license.
During a phone call on January 9, 2017, the U.S. NRC staff requested additional information be added to the Final Status Survey (FSS) report. Specifically, the U.S. NRC requested additional detector data be added to Table A-1 in the FSS report. In addition, the U.S. NRC staff requested that the static measurements summary and related survey information be included in the FSS. These actions have been completed. Enclosure 1 contains the FSS with the required additional information.
Should you have any questions regarding the LAR, please contact me or Mr. Jerry Newhouse at (979) 845-7551 or via email at mcdeavitt@tamu.edu or newhouse@tamu.edu.
Nuclear Science Center 1095 Nuclear Science Road, 3575 TAMU College Station, TX 77843-3575 Tel. (979) 845-7551 2
NUCLEAR SCIENCE CENTER Oath of Affirmation I declare under penalty of perjury that the foregoing is true and correct to the best of my knowledge.
Sincerely, Sean M. McDeavitt, PhD Director, TEES Nuclear Science Center Submitted with Level 2 Delegate Authorization from Dr. Yassin Hassan in letter dated February 8, 2016 (ADAMS Accession No. ML16043A048)
- Final Status Survey Summary Results Updated for the Unrestricted Release of the Zachry Engineering Center CC: next page
Nuclear Science Center 1095 Nuclear Science Road, 3575 TAMU College Station, TX 77843-3575 Tel. (979) 845-7551 3
NUCLEAR SCIENCE CENTER cc:
William Dean, Office Director United States Nuclear Reactor Commission Office of Nuclear Reactor Regulation Michael Young, President Texas A&M University 1246 TAMU College Station, TX 77843-1246 Dr. M. Katherine Banks, Vice Chancellor and Dean Dwight Look College of Engineering 3126 TAMU College Station, TX 77843-3126 Dr. Yassin Hassan, Department Head, Nuclear Engineering Texas A&M University Nuclear Engineering Department 3133 TAMU College Station, TX 77843-3133 Dr. John Hardy Reactor Safety Board Chairman Texas A&M University 3255 TAMU College Station, TX 77843-3255 Dr. Latha Vasudevan Radiological Safety Officer, Texas A&M University Environmental Health and Safety 1111 Research Parkway College Station, TX 77843-4472 Jerry Newhouse NSC Assistant Director Texas A&M Engineering Experiment Station 3575 TAMU College Station, TX 77843-3575 Scott Miller NSC Manager of Reactor Operations Texas A&M Engineering Experiment Station 3575 TAMU College Station, TX 77843-3575 Jeremy Osborn AGN-201M Reactor Supervisor Texas A&M University Nuclear Engineering Department 3133 TAMU College Station, TX 77843-3133
Nuclear Science Center 1095 Nuclear Science Road, 3575 TAMU College Station, TX 77843-3575 Tel. (979) 845-7551 4
NUCLEAR SCIENCE CENTER ENCLOSURE 1 TEXAS A&M UNIVERSITY FACILITY LICENSE R-23, DOCKET NO. 50-59 OPERATING LICENSE AGN-201M REACTOR UPDATED FINAL STATUS SURVEY RESULTS
FINALSTATUSSURVEYREPORT:
ZACHRYENGINEERINGCENTER AGN201MREACTORAREAS TEXASA&MUNIVERSITY COLLEGESTATION,TEXAS
UpdatedJanuary9,2017
Preparedby:
ReNukeServices,Inc.
710S.IllinoisAve.,SuiteF104 OakRidge,Tennessee37830
PreparedBy
January9,2017
ReNukeServices Date
Contents 1.0 EXECUTIVE
SUMMARY
....................................................................................................2
2.0 INTRODUCTION
...............................................................................................................2 3.0 PURPOSEANDSCOPE......................................................................................................2 4.0 SITEDESCRIPTION...........................................................................................................3 5.0 RADIOLOGICALCONTAMINANTSANDCRITERIA..........................................................6 6.0 IMPACTEDAREASANDSURVEYUNITS..................................................................................10 7.0 SURVEYAPPROACH................................................................................................................11 7.1 General..................................................................................................................11 7.2 SitePreparation.......................................................................................................11 7.3 IntegratedSurveyStrategy.....................................................................................11 7.4 SurveyInstrumentation..........................................................................................11 7.5 SurfaceScans.........................................................................................................14 7.6 StaticSurfaceActivityMeasurements...................................................................14 7.7 RemovableContaminationMeasurements..........................................................15 7.8 SamplesandAnalyses...........................................................................................15 7.9 QualityAssurance/QualityControl.........................................................................15 7.10 DataEvaluation......................................................................................................15 8.0 SURVEYUNITS..............................................................................................................16 9.0 ISOLATIONANDCONTROL...22 10.0 REPORT....22
11.0 REFERENCES
................................................................................................................22
APPENDIXA-MEASUREMENT&DETECTIONSENSITIVITIES.................................................A1 APPENDIXB-GRIDLAYOUTS(FIELDDRAWINGS)..................................................................B1 APPENDIXC-FSSSTATICMEASUREMENTSANDHEALTHPHYSICSDATA
SUMMARY
.C1
1
ACRONYMSANDABBREVIATIONS
ALARA AsLowAsisReasonablyAchievable C
carbon cm centimeter cm2 squarecentimeter cpm countsperminute Cs cesium dpm disintegrationsperminute Eu europium 3H tritium hr hour keV kiloelectronvolt m
meter m2 squaremeter MARSSIM MultiAgencyRadiationSurveyandSiteInvestigationMDC
minimumdetectableconcentration MDCR minimumdetectablecountrate MeV millionelectronvolts pCi picocurie pCi/g picocuriepergram PuBe plutoniumberyllium(neutronsource)
RSSI RadiationSiteSurveyandInvestigation TAMU TexasA&MUniversity TDSHS TexasDepartmentofStateHealthServices U
uranium U.S.NRC UnitedStatesNuclearRegulatoryCommission Ci microcurie
2
FINALSTATUSSURVEYREPORT ZACHRYENGINEERINGCENTER AGN201MRESEARCHREACTORFACILITY TEXASA&MUNIVERSITY,COLLEGESTATION,TX
1.0 EXECUTIVE
SUMMARY
AspartoftheTAMUrenovationandexpansionoftheZachryEngineeringCenter,theAGN201M reactor(U.S.NRCFacilityLicenseR23)hasbeendefueled,packagedandplacedinsecureoffsite storage,andisawaitingreinstallationinanewfacility.ThePart50licenseofrecord(R23)isnotbeing terminatedbuthasbeenamendedtoreflectthecurrentstoragearrangements.Associatedmaterials andequipmentpreviouslyinthereactorfacilityhavebeensurveyed,removed,anddispositionedin accordancewiththeTAMUreleasecriteria.Extensiveradiologicalsurveyshavebeenconductedin accordancewithaFinalStatusSurveyPlan,revisedindocumentdatedNovember10,2016(ADAMs AccessionNumberML16316A002).Noradioactivesurfacecontaminationhasbeenidentifiedandno neutronactivationofthebuildingstructureshasbeendetected;asummaryofsurveyandsampling dataispresentedinsection5,RadiologicalContaminantsandCriteria.Baseduponthesurveyresults relativetothe60Coscreeningvaluesselectedfortheproject,TAMUconcludestheformerreactor areasoftheZachryEngineeringCentermeettheapplicablereleasecriteriapresentedinSubpartEto 10CFR20,CriteriaforLicenseTermination,andrequestsunrestrictedreleaseoftheseareasfrom LicenseR23controls.
2.0 INTRODUCTION
Extensive alpha and beta surface contamination surveys were conducted using gas proportional detectors and swipes were collected and evaluated, all in accordance with the FSS Plan. No contamination over background was detected. Concrete samples from shield blocks previously positionedaroundthereactorsupportskirt,fromwallsinthereactorroom,andfromthefloordirectly underthereactorwerecollectedandsubmittedforanalysesbyanoffsitelaboratorytoconfirmno neutronactivationproductsarepresentatlevelsofconsequence.Noactivationproductshavebeen detected, with minimum detectable concentrations all less than 10% of the NUREG 1757 (Ref 1) screeningvaluesdevelopedforsoilcontamination.Thesoilscreeningvaluesweredirectlyapplicable, asdemolitionofablockwallwasnecessaryforremovalofthereactorshieldtank.
3.0 PURPOSEANDSCOPE
ThepurposeofthereleasesurveysistodemonstratethatareasoftheTexasA&MUniversityZachry Engineering Center that previously housed the AGN201M reactor and associated facilities satisfy criteriaoftheNuclearRegulatoryCommission,TexasDepartmentofStateHealthServices,andTexas A&M University Radiological Safety, Environmental Health and Safety for unrestricted release. By satisfyingthesecriteria,theremainingstructurecanbedemolishedorreusedwithoutradiological restrictions.
3
TAMUhasusedtheScreeningLimitsfor60Co,aspublishedinNUREG1757,Volume2,Consolidated DecommissioningGuidance,asupperlimitsfortheprojecttocomplywiththerequirementsof10CFR 20.1402, radiological criteria for the unrestricted release. In accordance with this rule, the site is consideredacceptable for unrestricted use if the residualradioactivity that is distinguishable from backgroundradiationresultsinatotaleffectivedoseequivalent(TEDE)toanaveragememberofthe publicthatdoesnotexceed25mrem(0.25mSv)peryear.Nocontaminationhasbeendetectedonany surfacesorcomponentsduringextensiveFinalStatusSurveys.Theseresultsareconsistentwithsurveys conductedinsupportofdefuelingandduringearlierscopingsurveys.
Site characteristics support the use of these values, as only superficial surface contamination was deemedtobepotentiallypresent.Inaddition,therearenoburiedpipesorpotentiallycontaminated structures,andnounusualradionuclideshavebeenidentifiedorconsideredlikely.Thescreeningvalues havebeendeterminedbytheU.S.NRCtobeALARA;nofurtherpathwaysevaluationsarerequired (AppendixNtoNUREG-1757,Volume2).TAMUsselfimposedreleasecriteriaaremorelimiting (contaminationisnottoexceedtwicebackground,usingappropriateinstrumentation),asexplained below.
4.0 SITEDESCRIPTION
Figure1isasitemapoftheTexasA&Mcampus,indicatingthelocationoftheZachryEngineeringCenter onBizzellStreetnearUniversityDrive.TheAGN201Mreactor(Fig.2)wasdesignedandinstalledasa fullyselfcontainedunit,withnoexternalcoolantorsampleirradiationsystems.ItwaslocatedinRoom 61Bonthegroundfloor,inthesouthwestportionofthebuilding(Fig.3).Themaximumauthorized steadystateoperatingpowerlevelforthereactoris5watts.Thereactordidnotoperateforseveral yearspriortodefuelingandremovalfromthebuilding.ThedesignoftheAGN201Mreactorprecluded thepossibilityofgroundwaterorsoilcontamination,astherearenoexternalcoolantpumps,heat exchangers,coolantmakeup/cleanupsystems,ornoexternalirradiationloops.Inaddition,thebasic designeliminatestheneedforradioactivewasteprocessingsystems(e.g.,nowastecompaction,liquid wastetreatment,orcontaminatedoffgastreatmentsystems).Accordingly,theFSSPlandidnotaddress soilorgroundwatersampling.
Room60Cwasprimarilyusedforofficespaceandaccesscontrol.Room61Awasusedinsupportof reactoroperations(e.g.,safeguardslaboratorywork,experimentpreparation).Room61Bcontained thereactorcontrolconsoleandasmallinnerroomwhereradioactivesourceswerestored.Accessto thetopofthereactorwasthroughRoom135(Fig.4)onthe1stfloorlevel,directlyabovethereactor room. Rooms 60C, 61A, 61B, and room 135 (which previously contained three ion accelerators) constitutetheprimarysitesecurityboundariesforthereactor.Figures3and4showthelayoutsofthe reactorfacility;boldedoutlinesindicatePrimaryReactorSiteboundaries.
Duringnormalpoweroperation,ventilationforthereactorareawasprovidedbyaventilationfanthat pulled air through a grated opening in the Room 61B ceiling and into Room 135. Portions of the ventilationsystemductexternaltothereactorfacilityweresurveyedinearly2016during laboratory facilitysurveys,andfoundtomeettheapplicablereleasecriteria.
4
Figure1.MapofTexasA&MCampus,indicatinglocationofZachryEngineering
5
Figure2.CutawayView(left)andphoto(right)ofAGN201MReactor
Figure3 Reactor Facility Ground Floor; Bolded outline indicates SecurityBoundaryandareassubjecttoFinalStatusSurveys
Sampled exterior block wall
27 ------------
48 --------------------
High density interior block walls
6
Figure4.ReactorFacilityFirstFloor;BoldedoutlineindicatesprimarySecurityBoundaryandareas subjecttoFinalStatusSurveys
5.0 RADIONUCLIDECONTAMINANTSANDCRITERIA
AGN201MreactoroperationsintheZachryEngineeringCenterbeganin1972andconcludedin2014.
RecordsandanecdotalinformationfromtheformerSeniorReactorOperatorhavenotrevealedany reactorincidentsoroccurrenceswhichmayhaveresultedincontaminationofsurfacesexternalto thereactorshieldtank.SurveysperformedbytheTAMURadiologicalSafetystaffdidnotidentifyany detectable removable contamination on reactor components or reactor room surfaces. Recent scoping surveys did not detect any fixed or removable contamination on surfaces in potentially impactedrooms.Consideringthelowpowerlevelandlimitedoperatingtime,thelowneutronfluence rate,inherentshieldingprovidedbythereactorcomponentsandcontainmenttank,andthedecay time since last operation, the likelihood of detectable activity in facility structural media was considerednegligible.
Conservative bounding calculations estimate 152Eu (likely the predominant activation product in concrete)specificactivityintherangeof103pCi/ginconcreteshieldblocksthatwerelocatedaround thereactorsupportskirt.Samplingandanalyseswereconductedtovalidatethecalculationbased conclusionthatnoactivationproductsarepresentatdetectablelevels.Candidateradionuclidesfor concrete activation include 152Eu, 154Eu, 60Co, 134Cs, 3H, and 14C. Laboratory analyses (gamma spectrometryandliquidscintillationcounting)ofsamplesaresummarizedinTable1.Samplesincluded coresfromfourinnermostshieldblocksfromthereactorskirt,onecorefromthereactorroomwall acrossfromthenorthgloryhole(areactoropening),Threecoresfromthesouthblockwallinlinewith
48 ---------------------------
27 -------------
7
Table1.
VolumetricSampleData (SampleswereanalyzedbyGeneralEngineeringLaboratoriesofCharleston,S.C.)
134Cs,pCi/g 60Co,pCi/g 152Eu,pCi/g 154Eu,pCi/g 3H,pCi/g 14C,pCi/g
Result (uncertainty)
MDC Result (uncertainty)
MDC Result (uncertainty)
MDC Result (uncertainty)
MDC Result (uncertainty)
MDC Result (uncertainty)
MDC Wall:hallway(noneutronirrad.)
2.17E02 (3.05E02) 5.82E02 9.05E03 (4.07E02) 7.23E02 8.93E04 (6.84E02) 1.12E01 5.03E02 (8.19E02) 1.73E01 4.54E01 (3.08) 5.43E+00 3.5E01 (8.15E01) 1.41E+00 Wall:Nside,oppgloryhole 1.58E02 (4.87E02) 8.97E02 5.32E03 (5.28E02) 9.91E02 8.47E02 (1.28E01) 1.90E01 7.42E02 (1.54E01) 2.97E01 2.24 (3.01) 5.44E+00 4.78E01 (7.88E01) 1.37E+00 S.Wall1:IW1(wallremoved) 5.74E04 (2.75E02) 4.77E02 6.36E03 (2.22E02) 4.30E02 1.44E02 (5.56E02) 1.09E01 1.65E02 (5.1E02 1.01E01 2.11 (4.23) 7.63E+00 3.68E01 (3.73E01) 6.26E01 S.Wall2:IW2(wallremoved) 2.84E03 (2.03E02) 4.52E02 1.24E03 (1.62E02) 4.11E02 1.2E02 (7.1E02) 1.40E01 5.85E02 (7.39E02) 1.30E01 1.58 (4.38) 7.85E+00 1.33E01 (3.54E01) 6.01E01 S.Wall3:IW3(wallremoved) 3.0E02 (3.15E02) 7.01E02 1.83E03 (3.19E02) 6.72E02 4.68E02 (7.23E02) 1.29E01 7.18E02 (9.79E02) 2.26E01 3.10E01 4.61 8.08E+00 4.62E01 (3.72E1) 6.21E01 Reactorshieldblock:E1 2.91E02 (3.84E02) 7.87E02 3.16E03 (3.94E02) 7.69E02 4.82E02 (7.42E02) 1.31E01 2.03E03 (1.09E01) 2.17E01 2.26E01 (4.52) 7.96E+00 1.38E01 (3.53E01) 5.98E01 Reactorshieldblock:S1 2.98E03 (4.15E02) 8.06E02 9.55E04 (3.54E02) 7.64E02 2.08E02 (9.69E02) 1.70E01 2.81E02 (8.95E02) 1.86E01 8.24E01 (4.63) 8.07E+00 4.06E01 (3.67E01) 6.14E01 Reactorshieldblock:N1 7.06E03 (2.54E02) 5.54E02 3.98E04 (4.03E02) 7.87E02 1.16E01 (1.17E1) 1.64E01 2.8E02 (1.09E01) 1.99E01 2.78 (4.34) 7.88E+00 3.01E01 (3.61E01) 6.07E01 Reactorshieldblock:W1 2.13E03 (3.17E02) 6.01E02 2.61E02 (3.35E02) 5.80E02 4.69E03 (6.45E02) 1.30E01 1.65E02 (9.46E02) 1.84E01 9.02E01 (4.54) 8.06E+00 5.79E02 (3.53E01) 6.01E01 Reactorpadconcrete1 1.01E02 (2.76E02) 5.89E02 4.68E03 (2.55E02) 5.19E02 5.15E03 (6.32E02) 1.26E01 2.28E02 (6.52E02) 1.55E01 5.41E01 (3.47) 6.85E+00 3.06E01 (3.77E01) 6.34E01 Reactorpadconcrete2 1.65E02 (2.48E02) 5.59E02 1.91E02 (3.00E02 5.20E02 4.01E03 (5.66E02) 1.14E01 4.81E04 (6.63E02) 1.41E01 4.83E01 (2.99) 6.30E+00 2.25E01 (3.76E01) 6.35E01 Floorunderreactorpad,1 3.35E02 (6.00E02) 9.17E02 1.59E02 (3.61E02) 6.72E02 8.95E02 (8.77E02) 1.77E01 4.36E2 (8.98E2) 2.07E01 1.70 (3.45) 6.27E+00 2.35E01 (3.77E01) 6.51E01 Floorunderreactorpad,2 4.98E03 (3.45E02) 6.87E02 2.55E03 (2.21E02) 5.17E02 5.05E03 (9.56E02) 1.69E01 2.99E02 (1.06E01) 1.98E01 1.13 (3.48) 6.58E+00 3.33E01 (3.75E01) 6.30E01 Ceilingplug (ThermalColumn) 1.36E02 (1.95E02) 4.95E02 1.34E02 (1.89E02) 5.28E02 2.11E02 (5.93E02) 1.16E01 2.57E03 (5.57E02) 1.30E01 7.42E01 (3.46) 6.71E+00 3.26E01 (3.81E01) 6.40E01
Table1Notes:
ValuesarepresentedinunitsofpCi/gforeachradionuclide,foreachsample,andarethelowestvaluesdistinguishablefrombackgroundwitha95%
certaintyofdetection.
Minimumdetectableconcentrationsforeachoftheradionuclidesofinterestarelessthan10%oftheNUREG1757soilscreeningvalues.EuropiumMDCs werealso<10%oftheEPAlimitingvaluesforresidentialsoils.
Thesoilscreeningvaluesaredirectlyapplicabletotheproject,asthesouthwallofroom61Bwasdemolishedtoremovethereactortank.
8
thegloryhole(thiswaswaslaterdemolished),twocoresfromtheconcretereactorpad,twocores fromtheconcretefloordirectlyunderthereactorpad,onecorefromtheoverheadconcreteshield plug,andonecorefromthewallintheaccesshallway,anareawithnosignificantneutronexposure.
Noneofthesampleswerefoundtocontaindetectableactivationproducts.
Coveringshavenotbeenappliedoveranyknownlocationofcontamination.Basedupondocumented neutron dose rates (as incorporated in facility Safety Analysis Report), the location in the facility considered mostlikely tohavebeenimpacted byreactor operationsistheconcretefloor directly beneaththereactorshieldtank.Radionuclidesintheabovetabledominatethepotentialsourceterm, andthereisnohistoryofcontaminationbyotherradionuclidesonsurfacesexternaltothereactor.
Section17.1.4ofNUREG1537establishesthefollowingcriteriatoreleasenonpowerreactorfacilities forunrestricteduse
- 1. a)nomorethan5microremperhourabovebackgroundat1mfromthesurface measured forindoorgammaradiationfieldsfromconcrete,components,and structures,or
b)nomorethan10milliremperyearforgammaemittersabovebackgroundabsorbed dosetoanyperson,consideringreasonableoccupancyandproximity(U.S. NRCletters dated March17,1981andApril21,1982).
- 2. ResidualsurfacecontaminationconsistentwithRegulatoryGuide1.86.
RegulatoryGuide1.86waswithdrawnbyU.S.NRC,effectiveAugust12,2016,howeverthe tableofacceptablesurfacecontaminationvalueshasbeenretained(seeTable2)forthe projectasthesevaluesarealsoinTexasRegulation25TAC§289.202(ggg)(6),Acceptable surface contamination levels (Ref 2), and are applicable to Statelicensed activities at TAMU.
Table2.
AcceptableSurfaceContaminationLevels Nuclidea Total Removable Unat,U235,U238,andassociateddecay products 5000 dpm/100 cm2 1000dpm/100 cm2 Transuranics,Ra226,Ra228,Th230,Pa231,Ac 227, I125,I129 100dpm/100cm2 20dpm/100cm2 Thnat,Th232,Sr90,Ra223,Ra224,U232,I126, I 131,I133 1000dpm/100cm2 200dpm/100cm2 Betagamma emitters (nuclides with decay modesotherthanalphaemissionorspontaneous fission) exceptSr90andothersnotedabove 5000dpm/100cm2 1000dpm/100cm2
- a. Wheresurfacecontaminationbybothalphaandbetagammaemittingradionuclidesexist,thelimits establishedforalphaandbetagammaemittingradionuclidesapplyindependently.
9
TheTAMUradiationsafetyprogramhasapolicyofnodetectableactivityforunrestricteduseand release.NodetectableactivityisinterpretedbyTAMUasnotexceedingtwicethebackgroundlevel (Ref3).
Nomaterialsspecificbackgroundcountratesweresubtractedduringscanningsurveysoffacilitysurfaces; ambient background counting rates were used. Note that 2step surveys were used for static measurements,asdescribedinsection7.3,IntegratedSurveyStrategy.
Thenominalambientbackgroundvalueswereusedtocalculatethesensitivityofthescanningsurveysto ensuretheyareadequaterelativetothesurfacecontaminationScreeningValuespresentedNUREG1757, AppendixH.Becausenoresidualradioactivitywasidentifiedduringextensivesurveysofthereactor, associatedcomponents,andthefacility,nospecificradionuclidesofinterestcouldbeidentified.The NUREG 1757, Appendix H surface contamination screening value for 60Co (7,100 dpm/100 cm2) was conservativelychosenforevaluationofpotentialbuildingcontamination.Table3presentsasummaryof the minimum detectable surface contamination, the U.S. NRC screening value, and the surface contaminationlevelscorrespondingtotwicethebackgroundlevels(theTAMUconstraint).
Duringscanningsurveys,netcountratesexceeding450cpmbetawereusedasscanninglimitswhenusing the126cm2detectors,or800cpmbetaforthe580cm2detector(i.e.,contaminationexceedingthe screeningvaluefor60Co).Noinstancesofelevatedscanningcountrateswereobserved.
Grossactivitysurveyslimitswereapplied(i.e.,nottoexceedtwicebackground,alphaandbetagamma activityevaluatedindependently).Also,notethatnetcountratesexceeding3cpmalphaor250cpmbeta whenusingthe126cm2detectors,or9cpmalphaor300cpmbetaforthe580cm2detector,were establishedaslimitsindicativeofcontaminationexceedingtheTAMUcriteria(twicebackground).No individualFSSmeasurementsexceededthesethresholdvaluesandnoremedialactionwasrequired.
Table3-Summarydata Detector/Application MDA (dpm/100cm2)
U.S.NRCCo60 DefaultScreening Value (dpm/100cm2)
TAMUtwice background equivalent (netdpm/100cm2) 126cm2gas proportional/scan AlphaN/A*
1500beta AlphaN/A*
7100 N/A 3000 126cm2gas proportional/static 63alpha 470beta AlphaN/A*
7100 26alpha(<MDC) 2200beta 580cm2gas proportional/scan AlphaN/A*
2280beta (fora100cm2spot)
AlphaN/A*
7100 A>2xbackground readingwillbe investigatedwitha126 cm2detector Laboratory counter/removableactivity 19alpha 90beta AlphaN/A*
710 4alpha 500beta
- Nopotentialalphaemittingcontaminantshavebeenidentified
10
MeasuredbackgroundexposurerateswithintheZachryEngineeringCenterare5to8microR/hr.Surveys confirmedthatdoseratesfrombackgroundplusresiduallicensedmaterialarenomorethan10microR/h, measured at 1 m from building surfaces, confirm compliance with the TAMU less than twice backgroundcriterion.Theobserveddoseratesarealsoconsistentwiththepreviouslynoted guidance fromNUREG1537.
6.0 IMPACTEDAREASANDSURVEYUNITS
TheMARSSIM(Ref4)defines impactedareasasthosewithapossibilityofresidualradioactivityinexcess of background levels. Radiological surveys of impacted areas are required to demonstrate that established criteriahavebeensatisfied.Nonimpactedareasarethosewithnoreasonableexpectation ofresidualcontamination;nosurveysofnonimpactedareasare required.Impactedareasareclassified astocontaminationpotentialasfollows:
Class 1: Areas that have, or had prior to remediation, a potential for radioactive contamination (based on site operating history) or known contamination(basedon radiologicalsurveys)expectedtobeinexcessof establishedunrestrictedrelease criteria.
Class 2: Areas that have, or had prior to remediation, a potential for radioactive contaminationorknowncontamination,butarenotexpectedto exceedestablished criteria.
Class3:Areasthatarepotentiallyimpactedbutarenotexpectedtocontain any residualradioactivity,orareexpectedtocontainlevelsofresidualactivity atasmall fractionoftheestablishedcriteria,basedonsiteoperatinghistory andprevious radiologicalsurveys.
Table4presentstheAGN201Mreactorfacilityimpactedareasandsurvey units. Categorizationwas basedonusehistory,previousmonitoringrecords,andscreeningsurveysconductedduringremovalof furnishings,materials,andequipmentfromthefacility.
Table4 ImpactedAreasandSurveyUnits Class Level Room(s)
Surfaces Numberof SurveyUnits Class1 Ground 61A Floorandlowerwalls 1
Ground 61B Floorandlowerwalls 1
First 135 Floorandlowerwalls 2
Class2 Ground 61Aand61B Upperwallsandceiling 1
Class2 First 135 Upperwallsandceiling 1
Class3 Ground 60C All 1
11
7.0 SURVEYAPPROACH 7.1 General
Asurveyplanwaspreparedinaccordancewithguidelinesandrecommendations,presented intheMulti AgencyRadiationSurveyandSiteInvestigationManual(Ref4). Theprocessdescribedin thisreference emphasizesandincorporatestheuseofDataQualityObjectivesandData QualityAssessment,alongwith aqualityassurance/qualitycontrolprogram. Agradedapproachwasimplementedtoassurethatsurvey effortsweremaximizedinthoseareashavingthegreatest potentialforresidualcontaminationorthe highestpotentialforadverseimpactsofresidual contamination.
Trained and qualified radiological technicians conducted field measurements, following standard proceduresandusingcalibratedinstruments appropriate for detecting and measuring thepotential contaminant.
7.2 SitePreparation
Furnishings, materials and equipment were removed from the facility in accordance with TAMU RadiationSafetyProgramprocedures. Following disassembly, defueling, removal and transfer of the reactorandassociatedcomponents,drains,ducts,grates,cabletrays, etc.,wereaccessedandsurveyed.
Nominal100cm2dualphosphordetectors(LudlumInstrumentsModel4393)havebeenusedwithdual channelscaler/ratemeters(LudlumInstrumentsModel2360)forhealthphysicssurveysconductedin supportofdefuelingandcleanupwork.Backgroundandefficienciesforthesescintillationdetectorsare identicaltothegasflowproportionaldetectorsselectedforfinalstatussurveys.Useofthemodel4393 scintillation detectors was augmented with thinwindow pancake GeigerMueller detectors with scaler/ratemeters(LudlumInstrumentsModel439detectorswithModel3scaler/ratemeters)toaccess smallerdiameterpenetrations(e.g.,usedforelectriccables,watersupplylines,naturalgaslines,etc.).
Nodetectableresidual activitywasidentifiedonbuildingsurfaces,withMDCswellbelowtheU.S.NRC andTAMUreleasecriteriaaspresentedinTable2andnoremediationwasrequired.Buildingsurfaces wereappropriately griddedat1m intervals,aspracticalfortheconditions. Gridoriginsarelocatedin thesouthwestcornerofeachsurveyunit.
7.3 IntegratedSurveyStrategy
Radiologicalsurveysconsistedof:
Surfacescansforelevatedlevelsofgrossalpha,beta,andgammaradiationlevels, Staticmeasurementsofgrossalphaandgrossbetaactivity, Smearsforremovablegrossalphaandgrossbetaactivity,and Samplingforlaboratoryanalysisofspecificradionuclidecontaminants.
Table5indicatesthesurveyrigorused.Facilityoperatinghistoryandsurveysperformedinsupportof reactordisassemblysupporttheselectedgradedapproach.
12
Table5.
SurveyRigorforEachSurveyUnit Contamination SurveyClass Alpha,Beta&
GammaScan StaticAlphaandBeta Removable Alpha&Beta 1
100% all structure surfaces Systematic static measurement at a minimum of 18 locationsandatadditionallocationsof highest potentialcontamination,basedon professional judgmentandscanresults Ateachstatic measurement location 2
50%floorand lowerwalls; 10%upperwalls andceiling surfaces Systematicstaticmeasurementataminimumof 18 locationsandatadditionallocationsof highest potentialcontamination,basedon professional judgmentandscanresults Ateachstatic measurement location 3
10%floorand 1m2around eachstatic measurement locationon lowerwalls Onefloormeasurementand1lowerwall measurementper10m2offloorareaineach room,andmeasurementsandatadditional locationsofpotentialcontamination,basedon professionaljudgmentandscanresults (minimumof18datapointspersurveyunit).
Ateachstatic measurement location
Because the TAMU acceptable release criterion of twice background is very low, Scenario B, as recommendedbyNUREG1505(Ref5),isthebasisforthesurveydesign. TheNullHypothesis forthat Scenariois:
Thesurveyunitmeetsthereleasecriterion.
TheobjectiveofthereleasesurveyistoacceptthisNullHypotheses,bydemonstratingata TypeI()
decisionerrorlevelof0.05andaTypeII()decisionerrorlevelof0.025thatresidual contaminationis lessthantwicebackground. Multiplebuildingsurfacetypes (e.g.,concrete,metal,glass)arepresentin mostsurveyunitsandbackgroundlevels,particularlyradondaughters,exhibitedvariabilitybyinstrument, material, time of day, and location within the facility. To facilitate adjusting measurements for appropriatelocalizedbackgroundcontributions,apairedmeasurementapproach wasusedfor static measurements. Toperformpairedmeasurements,ameasurementwasfirstperformedbyplacinga pieceofnominal1/4inmetalshieldmaterialbetweenthesurfaceandtheLudlum4368detectorface.The staticmeasurementwasrepeatedwithouttheinterveningshieldmaterial,andthe differencebetween thesecondandfirstmeasurementisthenetcontaminationmeasurement.
Noindividualstaticmeasurementidentifieddetectableactivityinexcessoftheprojectlimits(e.g.,allnet measurementsmustbelessthanthe3alphaand250 betacpmnominalcountrates,asmeasuredwith the4368detectorsthemorerestrictiveTAMUlimits). Nostatisticaltestsarerequiredtodemonstrate compliance withreleasecriteria.
Toestablishthenumberofmeasurementsneededtodemonstratethatresidualcontamination criteria have been satisfied, a parameter known as the relative shift, which effectively describes the
13
distributionoffinalsampledata,iscalculated,asfollows:
/=(DCGLLBGR)/,
[1]
/
=relativeshift DCGLCriteria =cleanupcriteria LBGR
=lowerboundofthegrayregionandisdefinedintheDQOsas50 percent oftheDCGL. Wherefinalsampledataarenotyetavailable, MARSSIM guidance(Section5.5.2.2)assignsavalueofonehalfof theDCGLfortheLBGR.
= standarddeviationofthesampleconcentrationsinthesurveyunit.
Wherefinalsampledataarenotyetavailable,MARSSIMguidance (Section5.5.2.2)recommendsavalueof30percentoftheDCGL.
UsingtheequationforrelativeshiftandMARSSIMguidanceforsituationswherefinalsample dataare notyetavailable,therelativeshiftfordesignpurposesis(1-0.5)/0.3foravalueof1.67. Basedonthe relativeshiftof1.67andTypeIandTypeIIdecisionerrorsof0.05and 0.025,respectively,thenumber ofrequireddatapointsfromeachsurveyunittoperformthe evaluation,asobtainedfromMARSSIM guidance(Table5.5)is18.
ForstaticmeasurementlocationsonClass1andClass2 roomsurfaces,arandomstartpoint was identified on the floor and additional measurement locations were systematically selected on a triangularspacingfromthatstartpoint.Spacingdistance,L,wasdeterminedby:
L=[(SurveyUnitArea)/0.866xnumberofdatapoints]0.5
[2]
Ductwork and piping was removed, or internals were accessed, scanned, and static measurements performedattheopenendsandadditionalpointsatafrequencyof1 measurement/4m2ofinternal surfacearea.
Static measurement locations in Room 60C, the only Class 3 unit, were at locations of highest contaminationpotential,baseduponareausesandasselectedbyprofessionaljudgment.
AppendixBpresentsthegridlayoutfielddrawingsforeachsurveyunit,derivedasdescribedabove.
7.4 FSSSurveyInstrumentation
Table6isalistofradiologicalsurveyinstrumentationusedfortheAGN201Mreactorfacilitysurveys.
Theseinstrumentsaremaintained,calibrated,andoperated inaccordancewithwrittenprocedures.For applicationtounrestrictedrelease,instrument response(efficiency)isbasedonNIST-traceablesources of 99Tc(betaEMAX =292keV)and230Th(alphaE=4.68MeV). Theenergiesoftheseradionuclidesare
14
representativeofthe dominantpotentialcontaminants.Notethatthe126cm24368gasflowproportional detectorshaveefficienciesandambientbackgroundcountratesthatareidenticaltothe100cm24393dual phosphorscintillationdetectorsusedforhealthphysicssurveysduringfacilitypreparationsforrelease;survey dataaredirectlycomparable.
Table6.
InstrumentationforFinalStatusSurveys Detector Display Application Ludlum4337 Ludlum2360 Alpha/betascans Ludlum4368 Ludlum2360 Alpha/betascans Ludlum4368 Ludlum2360 Alpha/betastaticmeasurements Ludlum4310 Ludlum2929 Removablealpha/betameasurements(scaler)
Ludlum19 N/A Gammascans/directgammameasurements
Forfieldmeasurementapplications,calibrationrepresents2response.Effectsofsurface conditionson measurementsareintegratedintotheoverallinstrumentresponsethroughuse ofasourceefficiency factor,inaccordancewiththeguidanceinISO75031(Ref6)and NUREG/CR1507(Ref7). Default surfaceefficienciesof0.25foralphaemittersand0.25forbeta emitterswillbeused.
Detection sensitivities are estimated using the guidance in MARSSIM and NUREG/CR1507.
Instrumentationandsurveytechniquesarechosenwiththeobjectiveofachievingdetection sensitivities of<50%ofthecriteriaforstructuresurfaces,forbothscanninganddirect measurement.Thesedetection sensitivities assure identification of areas potentially exceeding the established project criteria.
Minimumdetectableactivitylevelsareadequatefortheproject.RefertoAppendixAforderivationof applicableMDAs 7.5 SurfaceScans HandheldLudlumModel4368gasproportionaldetectors(126cm2) usedwithLudlumModel2360 scaler/ratemeters were used for alpha and beta surface scanning to identify locations of potential residualsurface.AlargeareacartmountedLudlumModel4337gasproportionaldetector(580cm2)was usedwitha LudlumModel2360scaler/ratemetertoscanthefloorsurfaces. Thesmallerhandheld detectorwasalsousedtosurveyfloorareasnotaccessiblewiththelargerdetector.Alpha/betascanning wasperformedby maintainingthedetectorwithin1/4inofthesurfaceandmovingthedetectoroverthe surface atarateofapproximatelyhalfofthedetectorwidthpersecond,whilemonitoringtheaudible outputof thescaler/ratemeterforimmediateidentificationofincreasesincountrate. When2alpha countsaredetectedwithinapproximately2s,thedetectormovementwashaltedatthelocationfor approximately10 secondstodetectapossibleelevatedcountrate.ThisisconsistentwithAppendixJ guidanceintheMARSSIMdocument(NUREG1575).
Ambientbackgroundlevelswereusedduringscanningsurveysofthefloorsandtheremainderofthe facilitysurfaces(primarilypouredconcretewalls,steelandglass).Nomaterialsspecificbackground countratesweresubtractedfromscanningsurveysoffacilitysurfaces.
15
ALudlumModel19MicroRgammasurveyinstrumentwasusedforgammascans. Generalareagamma monitoringwasperformedwiththeinstrumentapproximately1mabovethefloor.
7.6 StaticSurfaceActivityMeasurements
StaticmeasurementsofalphaandbetasurfaceactivitywereperformedusingtheLudlumModel 4368 gasproportionaldetectorswithLudlumModel2360scaler/ratemeters.Measurementswereconducted byholdingthedetectorinpositionwithin1/4inofthe surfaceandintegratingthecountovera2min period. Two measurements, one shielded and one unshielded, were performed at each static measurementlocation,withthenetcountratebeingthedifferencebetweenthetwomeasurements, foralphaandbetadetection.
7.7 RemovableContaminationSurveys
Asmearforremovableactivitywasperformedateachstaticsurfaceactivitymeasurement location. A 100cm²surfaceareawaswipedwithanominal2indiameterclothsmear,usingmoderatepressure.
7.8 SwipeSampleAnalyses
Smearswereanalyzedonsiteforgrossalphaandgrossbetaactivitybyperforming2minuteintegrated countsusingaLudlumModel 2929scalerwithaModel43101dualscintillationdetector(orequivalent instrumentation).
7.9 QualityAssurance/QualityControl
Measurementswereperformedinaccordancewiththesurveyplanbyqualifiedpersonnel following writteninstrumentoperatingprocedures.InstrumentcalibrationpracticesmeetANSIstandardsanddaily backgroundandsourceresponsechecksofinstrumentswereperformedtoverifyconsistentacceptable operation. Forqualitycontrolpurposes,replicate staticandremovableactivitymeasurementswere obtainedat2locationsineachsurveyunit.
ARadiochemistryTechnicalCaseNarrativewasprovidedbythelaboratoryforeachsampleset,and includedaDataSummaryandQualityControlInformationrelatedtoanalyticalworkperformed.The analyticaldatareportswerereviewedandaccepted.
7.10 DataEvaluation
Surfacecontaminationmeasurementdatawasadjustedforambientbackgroundand convertedtounits ofnetcountsperminute. Datawasassessed during collection and during survey reviewstoverify consistencywiththesurveyplananddesignassumptions. Individual datapointshavebeencompared withthecountratelimitderivedfromNUREG1757surfacecontaminationscreeningvaluesfor60Coand theTAMUcriteriaoftwicebackground-nosurveypointsfailed.Becauseeachsurveypointindividually passedtheacceptancecriteria,nostatisticalevaluationofthedatasetisrequired.
16
EvaluationofvolumetricsampledatahasbeenpresentedinSection4,RadionuclideContaminantsand Criteria.Noactivationproductsweredetectedinthebuildingstructure.
Becausealloftheindividualsurveypointsmeettheconservativelyselected60Cosurfacecontamination screeningvalues,andwithnoactivationproductsdetected,TAMUfindsthatRooms60C,61A,61B,and 135meetconditionsnecessaryforunrestrictedreleasefromlicensecontrols.TheanticipatedTEDEtoan averagememberofthecriticalgroupdoesnotexceed25mremperyear,asdeterminedinthederivation oftheNUREG1757screeningvalues,andconsistentwith10CFR20,SubpartEcriteriafortermination oflicensecontrols.Inaddition,withMDCsforprincipalconcreteactivationproductall<10%ofthe screeningvalues,the10mrem/yearlimitinNUREG1537isalsometwithnofurtheranalysesneeded (theresultantdosewillnotexceed3mrem/y,witha95%confidence).
8.0 SURVEYUNITS
Asummarydescriptionandreviewofeachsurveyunitfollows.
8.1 Room61B,ReactorRoom Room61B(Fig.5)isaClass1surveyunitthatpreviouslyhousedtheAGN201Mreactor,theassociated controlconsole,andasmallsourcestorageroom.Thisisanominal66m2Class1surveyunitcomprised ofthefloorandwallsupto8feetabovethefloor.Aminimumof18staticmeasurementandswipes wererequired,asderivedusingthemethodologydescribedinsection7.3,IntegratedSurveyStrategy; 23staticmeasurementandswipelocationswereused.Allfloorandwallscanswerelessthantwice backgroundandwithinthe 60Coscreeningvalues,asweretheassociatedstaticmeasurementsand swipes.Measuredradiationlevelswerewithinbackgroundlevelsof3to5microR/h.
Figure5. Room61B,reactorroomaftereverythingwasremoved,cleanuedupandthewallresealed.
17
Noreactorprocesspipingorductworkwaspresentinthearea,astheAGN201Misaselfcontained devicewithnoexternalsampleirradiationorcoolingpipingsystems.
Twoelectricalconduits(4inand6inID)arepresentinthefloorandterminatedinsealedconnection boxesandruntotheadjacentroom(61A).Thesewereusedforreactorcontrolwiringwhenthereactor control console was located outside room 61B, but have not been used in the recent past. The terminationboxeswereopenedandsurveyed,withnodetectablesurfacecontaminationinexcessof backgroundidentified.Eachendoftheconduitwasdirectlymonitoredforsurfacecontamination,with nodetectablesurfacecontaminationinexcessofbackgroundidentified.Largeareaswipeswerepulled throughthelengthofeachofthetwoconduitsandtheclothwassurveyed;nodetectablecontamination inexcessofbackgroundwasidentified.
Afloordraininthereactorroomislocatedadjacenttothereactorpadandwaspipedtoadedicated polyethylenecollectiontank.Thiswasacontingencyforcollectionofthechromatedwaterusedfor shielding in the AGN201M outer shield tank. The system was never used. As part of the facility disassemblywork,thenominal4inPVCdrainlinewascutintoshortsectionsandtheplastictankwas sectionedtofacilitateconfirmationcontaminationsurveys.Nocontaminationoverbackgroundlevels wasdetectedonthepipesectionsorthetank.Thefloordraingrillwasremovedandthedrainbowl surveyedinplace.Aswiththeassociatedpipingandcollectiontank,nocontaminationoverbackground wasidentified.
Theformersourcestorageareaincludedthreesourcestoragewells(Fig.6),constructedusingnominal 9insidediameterironsleevesembeddedapproximately4ftintheconcretefloor.Thediameterwas sufficientlylargetopermitsurveyswiththehandheldgasproportionaldetectors.Directmeasurements ofsidesandbottomweremadeandswipeswereobtained;nodetectablecontaminationinexcessof backgroundwasidentified.
Figure6.
Sourcestoragewells.
Agrateintheceilingoverthereactorshieldtankprovidedtheonlyairflowpathwayfromtheroom.This wasnotaductedexhaust,butdischargedintoroom135(theformeracceleratorroom)throughagrate in the room 135 floor. The walls of this penetration were thoroughly surveyed; no detectable contaminationinexcessofbackgroundwasidentified.
Amultisegmentsteppedshieldplugispartoftheceilingofroom61B,andwasthoroughlysurveyed whenopenedforreactordisassembly.Itisaddressedfurtherintheroom135surveysummary.
18
Asnotedabove,allfloorandwallscanswerelessthantwicebackgroundandwithinthe60Coscreening values,asweretheassociatedstaticmeasurementsandswipes.Measuredradiationlevelswerewithin backgroundlevelsof3to5microR/h.
8.2 Room61A,safeguardslaboratory
Room61AisaClass1surveyunitthatwaspreviouslyusedforpreparationofreactorexperiments.This isanominal60m2(includingtheaccesshallway)Class1surveyunitcomprisedofthefloorandwallsup to8feetabovethefloor;theaccesshallwaywasincludedinthesurveyunit.Aminimumof18static measurementandswipeswererequired,asderivedusingthemethodologydescribedinsection7.3, IntegratedSurveyStrategy;20staticmeasurementandswipelocationswereused.Allfloorandwall scanswerelessthantwicebackgroundandwithinthe60Coscreeningvalues,asweretheassociated staticmeasurementsandswipes.
Noreactorassociatedprocesspipingorductworkwaspresentinthearea.Twoelectricalconduits(4in and6inID)areinstalledinthefloorandterminatedinsealedconnectionboxesandruntotheadjacent room(61B).Thesewereusedforreactorcontrolwiringpriortothereactorcontrolconsolebeingmoved intoroom61B.Theyhavenotbeenusedintherecentpast.Theterminationboxeswereopenedand surveyed,withnodetectablesurfacecontaminationinexcessofbackgroundidentified.Eachendofthe conduitwasdirectlymonitoredforsurfacecontamination,withnodetectablesurfacecontaminationin excessofbackgroundidentified.Largeareaswipeswerepulledthroughthelengthofeachofthetwo conduits and the cloth was surveyed; no detectable contamination in excess of background was identified.Ashortelectricalconduitpenetrationalsorunsthroughthewestwallintoroom60C,the original location of the reactor console. Each end of this conduit was surveyed with handheld instrumentation and swipes were obtained from the interior surfaces, include wiring that remains present.Nocontaminationoverbackgroundlevelswasdetected.
Radiologically unimpacted sealed cooling lines and wiring associated with former ionimplant acceleratoroperationsranfromtheoverheadroom135throughalargediameterpenetrationinthe room61Aceilingandexitedroom61Athroughawallpenetration.Thecoolinglineswereremoved, surveyedandconfirmedtobefreeofdetectablesurfacecontamination.Penetrationswereaccessible andsurveyedduringtheFSSworkinroom135.
Achemistrybenchwaslocatedinthenorthwestcornerofroom61A(Fig.7);itwasthoroughlysurveyed during scoping and characterization work, and was removed/disposed as nonradiological waste.
Utilities(naturalgas,potablewater,compressedair)andaglassdrainlinewerepreviouslyconnected tothebench.Followingconfirmatorysurfacecontaminationsurveys,theutilitylineswereterminated andremoved.Theglassdrainlinewasremovedinsectionsalongwiththetrapunderthebench.No contaminationoverbackgroundwasdetectedinthesink,thesinktrap,orconnectionjoints.Surveys includedconfirmatoryliquidscintillationcountingofsamplesbyTAMU,withnoactivity(includinglow energybetaemitters)detected.Theassociateddrainsumphadbeenpreviouslyreleasedaspartof decommissioningactivitiesassociatedwithStatelicensedadjacentlaboratories.
19
Allfloorandwallscanswerelessthantwicebackgroundandwithinthe60Coscreeningvalues,aswere theassociatedstaticmeasurementsandswipes.Measuredradiationlevelswerewithinbackground levelsof3to5microR/h.
Figure7. Room61A,safeguardslaboratory(panoramainducedcurvature).
8.3 Room60C,accesscontrolandofficearea Room60CisaClass3 surveyunitthatwasprimarilyusedforcontrollingaccesstothesafeguards laboratoryandreactorroom.Itwasalsotheinitiallocationforthereactorcontrolpanelpriortomoving itinsidethereactorarea.AsmallofficefortheSeniorReactorOperatorwasaddedwithin60Cinthe late1990s.Aminimumof18staticmeasurementsandswipeswererequired,asderivedusingthe methodologydescribedinsection7.3,IntegratedSurveyStrategy;21staticmeasurementsandswipe locationswereused.Inadditiontoprescribedstaticmeasurementsonthelowerwallsandfloor,100%
ofthefloorwasscanned.Wiringpenetrationsinthewallfromroom61Aweresurveyedprimarilyfrom room61A,withconfirmatorysurveysperformedin60C.
Aglassdrainlinefromroom135(theformeracceleratorlaboratory)ranthroughasectionofroom60C, butwasnotutilizedinanywaywithin60C.Thedrainlinewasremovedinitsentiretyaspartofthe scopingworkforroom135;noactivitywasdetectedontheinsideoroutsidesurfaces.
Allfloorandwallscanswereatbackgroundlevels,asweretheassociatedstaticmeasurementsand swipes.Measuredradiationlevelswerewithinbackgroundlevelsof3to5microR/h.
8.4 Room135,acceleratorlaboratory Room135(Figs.8and9)consistsoftwoindividualClass1surveyunitsforfloorandlowerwallsurveys, andasingleClass2surveyunitfortheceilingandupperwalls.Itwaslastusedprimarilyforionimplant acceleratorexperimentation.Italsoprovidedaccess,viaheavy,steppedconcretefloorplugs,tothe thermalcolumnatthetopoftheAGN201Mreactor.DiscussionswithTAMUstaffindicatethatthis accesspointhasnotbeenutilizedsincethelate1990s.Inadditiontothethermalcolumnaccessplug, thereisalsoanominal24inx24inpenetrationthroughthefloor,gratedatbothends,toprovideair flowfromthereactorroom(61B)totheacceleratorroom.Asinglepointventilationintakehousingwas locatedatthesouthwestcornerinroom135.Itwasequippedwithahighefficiencyparticulateair
20
filtrationcabinetandservicedbyasingleblowerontheroof.Therewasnodirectconnectionprovided forreactoroperationsinroom61B.Thefilterhousingwasthoroughlysurveyedduringearlyfacility characterization work, but no activity was identified. The throughwall exhaust penetration in the southwestcornerandthemakeupairpenetrationinthenortheastcornerwerethoroughlysurveyed; noactivityinexcessofbackgroundwasidentified.
Figure8. Room135acceleratorroom,lookingnorth.
Figure9.Room135acceleratorroom,lookingsouth.
Achemistrybenchwaslocatedinthenorthwestcornerofroom135.Itwasthoroughlysurveyedduring scopingandcharacterizationwork,andremoved/disposedasnonradiologicalwaste.Utilities(natural gas,potablewater,compressedair)andaglassdrainlinewerepreviouslyconnectedtothebench.
21
Followingconfirmatorysurfacecontaminationsurveys,theutilitylineswereterminatedandremoved fromtheirrespectivethroughwallmetalsleeves.Theglassdrainlinewasremovedinsectionsalong withthetrapunderthebench.Thedrainpenetrationranthroughroom60C;thedrainlinewasalso removedfromtheceilingofroom60C.Nocontaminationoverbackgroundwasdetectedinthesink,the sinktrap,orconnectionjoints,orinthehorizontalsectionsremovedfrom60C.Additionalsurveywork includedconfirmatoryliquidscintillationcountingbyTAMUstaffofliquidsamplesobtainedfromthe draintrap;noactivity(includinglowenergybetaemitters)overbackgrounddetected.Theassociated drainsumphadbeenpreviouslyreleasedaspartofdecommissioningactivitiesassociatedwithState licensed adjacent laboratories. Adjacent floor penetrations allowed for routing of nonradiological acceleratorcoolinglinestothelowerelevations.Thecoolinglineswereremovedandsurveyed,along withtheinteriorofthelargefloorpenetration;noactivityinexcessofbackgroundwasdetectedonthe acceleratorcoolinglinesorinsidethepenetration.
Severalelectricalconduitboxesarelocatedinthesouthwestsectionofwall.Surveysinsidetheboxes, includingswipes,didnotidentifyactivityinexcessofbackgroundlevels.
Thebuildingdesignincludedstepped,4pieceremovableconcreteshieldplugsdirectlyoverthereactor topermitaccesstoreactorsthermalcolumn(Fig.10).Theshieldplugsectionsremainedundisturbed forthelast15years,butwereremovedinSeptemberaspartofthereactordisassemblyanddefueling work.Thoroughsurveyswereperformedduringtheremovalandpriortoreassemblyoftheshield,and includeddirectandremovablesurfacecontaminationmeasurementsontheindividualshieldsections andthesteppedlandsinthefloor.Noactivityinexcessofbackgroundwasidentified.Thebottomshield closesttothereactorwasalsosampledforactivationproducts(sampleceilingpluginTable1).No activationproductsweredetected.
Figure10. Shieldplugdetails:(left)Thethirdoffourshieldplugsbeingremovedand(right)theopen floorpenetrationabovetheAGN201Mshowingsteps.
22
Alarge,3toncapacityoverheadbridgecranewasinstalledintheroom.Surveyswereconductedonthe bridgeandtrolleysteel,exposedcableonthecabledrum,andonthecranehook.Noactivityinexcess ofbackgroundwasidentified.
Aminimumof18staticmeasurementsandswipeswererequiredineachClass1surveyunit,asderived usingthemethodologydescribedinsection7.3,IntegratedSurveyStrategystatic.18measurementand swipe locations were used in each of the 2 Class 1 survey units. All floor and wall scans were at backgroundlevels,asweretheassociatedstaticmeasurementsandswipes.
Obtainingrepresentativeceilingmeasurementswasinitiallycomplicatedbybuildupofradondaughters ontheplasticlightcovers(a35minuteapparenthalflifewasnotedwhenthelampswereextinguished).
Scanningandstaticmeasurementsontheceilingweresubsequentlyperformedwiththeassociated lightingbankdeenergizedforanextendedperiodpriortothestartofsurveywork.Asaconservative measure,thenumberofstaticmeasurementsontheceiling(asingleClass2surveyunit)wasdoubled from 18 to 36, effectively mimicking the floor grids (2 Class 1 survey units). Ceiling scans, static measurements,andswipesmettheacceptancecriteria.
In summary, all floor,wall, andceiling scanswere less than twice background and withinthe 60Co screeningvalues,asweretheassociatedstaticmeasurementsandswipes.Floorshieldplugsandlands were previously (October 2016) demonstrated the meet the same criteria and closed. Measured radiationlevelsinRoom135werewithinbackgroundlevelsof3to5microR/h.
9.0 ISOLATIONANDCONTROL
FollowingcompletionoftheFinalStatusSurveys,andtheU.S.NRCdirectedconfirmatorysurveys,the facilitywaslockedandaccesscontrolledbyTAMUpendingU.S.NRCapprovalforunrestrictedrelease.
TheseareaswillnotbeavailableforgeneralaccessorworkuntilU.S.NRCapprovalforunrestricted releaseisobtained.
10.0 REPORT
This report provides a survey data summary and technical justification to demonstrate acceptable conditions for unrestricted release in accordance with criteria presented in 10 CFR 20, Subpart E, Radiologicalcriteriaforunrestricteduse.
11.0 REFERENCES
- 1. Consolidated Decommissioning Guidance Characterization, Survey, and Determination of RadiologicalCriteria,NUREG1757,Vol.2,Rev.1,U.S.Nuclear RegulatoryCommission,2006.
- 2. TexasRegulationsforacceptablecontaminationlevelsforunrestricteduse,25TAC§289.202(ggg)(6).
- 3. Radiological Safety Program Manual, Radiological Safety Environmental Health and Safety Department,TexasA&MUniversity,July2004.
- 4. MultiAgencyRadiationSurveyandSiteInvestigationManual(MARSSIM),NUREG1575 (Rev.1),U.S.
23
NuclearRegulatoryCommission,2000.
- 5. A Nonparametric Statistical Methodology for the Design and Analysis of Final Status DecommissioningSurveys,NUREG1505(Rev1)U.S.NuclearRegulatoryCommission, 1998.
- 6. Evaluation of Surface Contamination - Part 1: Beta Emitters and Alpha Emitters, ISO 75031, InternationalOrganizationforStandardization,1988.
- 7. Minimum Detectable Concentrations with Typical Radiation Survey Instruments for Various ContaminantsandFieldConditions,NUREG/CR1507,U.S.NuclearRegulatory Commission,1997.
A1
AppendixA
Measurement/DetectionSensitivitiesofSurveyTechniques
ThemethodsforcalculatingsurveydetectionsensitivitiesarepresentedinMARSSIM(Ref4)andNUREG 1507 (Ref 7). Detector parameters used in these calculation are background count rate, efficiency (instrumentresponseandsurfacecorrectionfactors),anddetectorarea.TableA1presentstypicalvalues oftheseparametersfordetectorsusedforsurveysofconcretestructuresurfacesoftheAGN201Mreactor facility.Backgroundlevelsforconcretearethehighestforsurfacemediaremaininginthisfacility,and therefore direct measurements on other media will be more sensitive than those presented here for concrete.
TableA1. TypicalDetectorParametersforSiteSurveysofConcreteSurfances
Detector/
Instrument ProbeArea(cm2)
Background(cpm)
Detectorefficiency Surfacecorrection
alpha Beta alpha beta alpha Beta 4337 580 9
300 0.50 0.46 0.25 0.25 4368 126 3
250 0.36 0.36 0.25 0.25
- 4393 100 3
250 0.37 0.35 0.25 0.25 2929 N/A 1
25 0.25 0.20 N/A N/A
- The4393detectorwasnotusedduringfinalstatussurveys,butwasusedforhealthphysicssupportsurveysandduring reactordisassembly.Thespecificationsareincludedheretoallowdatatobecomparedwithfinalstatussurveys.MDCsare comparabletothe4368gasflowproportionaldetectors.
AlphaScans
SurfacescansforalphaactivityareconductedusingLudlumModel4337andModel4368gasproportional detectors,coupledwithLudlumModel2360scaler/ratemeters.MARSSIMrecommendstheuseofPoisson summationstatisticstoestimatetheprobabilityofdetectingasmallnumberofcountsthatmayindicate thepossiblepresenceofalphacontaminationduringarelativelyshortobservationperiod.Theequation forestimatingtheprobabilityofdetecting1ormorecountsis:
P(n>1)=1-e[((GE+B)t))/60]
[A.1]
where:
P(n>1)=Probabilityofgetting1ormorecountsduringthetimeinterval G=Sourceactivity(disintegrationsperminute,dpm)
B=Backgroundcountrate(countsperminute,cpm)
E=Detectorefficiency(counts/disintegration) t=Dwelltimeoversource(sec)
A2
Theprobabilityofdetecting2ormorecountsisgivenby:
P(n>2)=1-(e[((GE+B)t)]/60]-((GE+B)(t))/60).e[((GE+B)t)]/60]
[A.2]
Usingtheseparameters,detectionprobabilitycalculationsforacontaminationlevelof100dpm/100cm2 wereperformedforascanrateofhalfofdetectorwidthpersecond(i.e.,dwelltimesof2seconds).The probabilitiesofdetectingasinglealphacountduringa2sdwelltimeareapproximately33%forthe4368 detectorand52%forthe4337detector.Becauseofthehigherbackgroundcountrateassociatedwiththe 4337floormonitordetector,MARSSIM(AppendixI)recommendsusing2countsasascreeningvaluewhen scanningforalphacontamination.Theprobabilityofdetecting2countswiththelargerdetectorincreases to approximately 82%. Whenever a count is detected, the detector is paused over the surface for 10 secondstodeterminewhetherthereisactuallyelevatedalphaactivitypresent,inwhichcase,astatic measurementisthenperformed.A10secondpauseresultsina90%orgreaterprobabilityofidentifying the presence of alpha activity exceeding 100 dpm/100 cm2. Although the calculated scan detection probabilities may appear relatively low, it should be noted that historic records and characterization surveyshavenotidentifiedanypotentialforalphacontaminationinthisfacility.
AlphaActivityStaticMeasurements
Static measurements of alpha surface activity are performed using 4368 detectors, with the same backgroundandresponsecharacteristicsasindicatedaboveforalphascanning.Astaticmeasurementis performedbyplacingthedetectoronthesurfacefora2minuteintegratedcount.Theminimumdetectable alphacontaminationlevel(MDC)iscalculatedasfollows:
MDC=[3+4.65(BKGD)1/2]/(efficiencyfactors)(detectorarea/100)(counttime) [A.3]
Theresultingvalueisapproximately63dpm/100cm2.
BetaScans
SurfacescansforbetaactivityareconductedusingLudlumModel4337andModel4368gasproportional detectors,coupledwithLudlumModel2360scaler/ratemeters.Thedetectorispassedoverthesurfaceat a rate of 0.5 detector width/sec, while maintaining the distance from the detector to the surface at approximately0.5cm.Theaudiblesignalfromtheinstrumentismonitoredbythesurveyor.Detectable changesinthecountratearenoted,andtheimmediatearearesurveyedatareducedspeedtoconfirmthe changeinaudiblesignaland,ifapplicable,toidentifytheboundaryoftheimpactedarea.Theminimum detectablecountrate(MDCR)isafunctionofthebackgroundcountrate(BKGD)incountsperminute(cpm) andthetime(i)insecondsthatthedetectoriswithincloseproximitytothesourceofradiation.Equation 66ofNUREG1507providesthefollowingrelationship:
MDCR=d[BKGD*i/60]1/2*60/i
[A.4]
A high probability (95%) of true detection is the objective, and the survey is willing to accept a high
A3
probabilityoffalsepositivedetections(60%)withresultinginvestigations.Thevalueofdisselectedfrom Table6.1inNUREG1507tobe1.38.
Toaccountforlessthanidealsurveyperformance,asurveyorefficiencyfactor(p)of(0.5)1/2wasalso incorporatedintothefinalcalculationofbetascansensitivityasfollows:
.. / /
[A.5]
Theresultingvaluesareapproximately1500dpm/100cm2forthe4368detectorandanaverageof390 dpm/100cm2forthe4337detector.Ifonlyasingle100cm2areaispresent,thescansensitivityforthe43 37detectorwouldbeapproximately2280dpm.
BetaActivityStaticMeasurements
Staticmeasurementsofbetasurfaceactivityareperformedusing4368detectors.Astaticmeasurement is performed by placing the detector on the surface for a 2minute integrated count. The minimum detectablebetacontaminationlevel(MDC)iscalculatedasfollows:
MDC=[3+4.65(BKGD)1/2]/(efficiencyfactors)(detectorarea/100)(counttime)
Theresultingvalueisapproximately470dpm/100cm2.
RemovableAlphaandBetaActivityMeasurements
Smearsforremovableactivityarecountedfor2minutesinaLudlumModel2929alpha/betacounter.The backgroundsare1alphacpmand25betacpm;4detectionefficienciesare0.25alphaand0.20beta.Using thesameequation(withoutprobeareacorrection)asabovefordirectmeasurementsyieldsremovable activityMDCsofapproximately19alphadpm/100cm2and90betadpm/100cm2.
B1 AppendixB
LayoutofIndividualSurveyUnitGrids (FieldDrawingsBasedUponNUREG1757Guidance)
Room60C,AccessControlandOfficeArea,SurveyClass3
B2
Room61A,SafeguardsLaboratory,SurveyClass1
Room61B,ReactorRoom,SurveyClass1 (Refertopage8forinitialroomlayout)
B3
Rooms61Aand61B,CeilingGridReactor&LaboratoryAreas,SurveyClass2
B4
Room135,AcceleratorRoom(North),SurveyClass1
Room135,AcceleratorRoom(South),SurveyClass1
B5
Room135,CeilingGrid,SurveyClass2
Appendix C - Zachry Engineering Center FSS Static Measurements and Health Physics Survey Data Summary
C1 InstrumentandMeasurementInformationforFSSwork:
AllstaticmeasurementwerepreformedusingLudlumInstruments4368gasproportional detectorsandModel2360scaler/ratemeters.
Allstaticmeasurementswere2minuteintegratedcounts,oneshieldedandoneunshielded, perlocation
60Co(abetaemitter)istheselectedradionuclideofconcern,butgrossalphameasurements werealsoconducted
ForFSSsimultaneousalpha/betastaticmeasurements,themanufacturer'salpha backgroundspecificationof3cpmwasusedunlessahighershieldedalphameasurement wasobserved
Surveyunitdatasetsummariesincludemeasurementsmadewithbothinstruments.
Allinstrumentswereresponsecheckedatthestartandendofeachshift.
SurveylocationsarenotedinAppendixBtotheFSS(circledlocationsaretherandom startingpoints)
TheTAMURadiologicalSafetyProgramspecifiesaresidualcontaminationlimitsasfollows:
- a. nodetectablecontaminationabovebackground,i.e.,notmorethantwice backgroundlevels
- b. thedeterminationofnodetectablecontaminationabovebackgroundmustbe madewithadetectorwhichhasbeenresponsecheckedwithinthepast12months andswhichissuitableformeasuringthetype(s)ofradiationexpected(page30of the2004revisiontotheRSPManual)
Instrumentation:
M2360scaler/ratemeter:
276980
M2360scaler/ratemeter:
268488 4368gaspropdetector 95080
4368gaspropdetector 94819 calibrationdue:
6/1/2017
calibrationdue:
5/31/2017
Appendix C - Zachry Engineering Center FSS Static Measurements and Health Physics Survey Data Summary
C2
Room60C OfficeArea,Class3 datafrom2minuteintegratedcounts Meetsrelease criteria?
staticpoint#1 unshieldedcpm 0.5 unshieldedcpm 150.5 shieldedcpm 3
shieldedcpm 149 netcpm 2.5 netcpm 1.5 TRUE staticpoint#2 unshieldedcpm 3
unshieldedcpm 168.5 shieldedcpm 3
shieldedcpm 157 netcpm 0
netcpm 11.5 TRUE staticpoint#3 unshieldedcpm 3
unshieldedcpm 184 shieldedcpm 3
shieldedcpm 154 netcpm 0
netcpm 30 TRUE staticpoint#4 unshieldedcpm 0.5 unshieldedcpm 153 shieldedcpm 3
shieldedcpm 154 netcpm 2.5 netcpm 1
TRUE staticpoint#5 unshieldedcpm 0.5 unshieldedcpm 164.5 shieldedcpm 3
shieldedcpm 106 netcpm 2.5 netcpm 58.5 TRUE staticpoint#6 unshieldedcpm 0.5 unshieldedcpm 136 shieldedcpm 3
shieldedcpm 130.5 netcpm 2.5 netcpm 5.5 TRUE staticpoint#7 unshieldedcpm 3.5 unshieldedcpm 180 shieldedcpm 3
shieldedcpm 110 netcpm 0.5 netcpm 70 TRUE staticpoint#8 unshieldedcpm 4
unshieldedcpm 114 shieldedcpm 3
shieldedcpm 109.5 netcpm 1
netcpm 4.5 TRUE staticpoint#9 unshieldedcpm 3.5 unshieldedcpm 179 shieldedcpm 3
shieldedcpm 153 netcpm 0.5 netcpm 26 TRUE staticpoint#10 unshieldedcpm 2
unshieldedcpm 160 shieldedcpm 3
shieldedcpm 161 netcpm 1
netcpm 1
TRUE staticpoint#11 unshieldedcpm 2
unshieldedcpm 171 shieldedcpm 3
shieldedcpm 168.5 netcpm 1
netcpm 2.5 TRUE
Appendix C - Zachry Engineering Center FSS Static Measurements and Health Physics Survey Data Summary
C3
staticpoint#12 unshieldedcpm 2
unshieldedcpm 102 shieldedcpm 3
shieldedcpm 83.5 netcpm 1
netcpm 18.5 TRUE staticpoint#13 unshieldedcpm 3
unshieldedcpm 119.5 shieldedcpm 3
shieldedcpm 93 netcpm 0
netcpm 26.5 TRUE staticpoint#14 unshieldedcpm 3
unshieldedcpm 184 shieldedcpm 3
shieldedcpm 157 netcpm 0
netcpm 27 TRUE staticpoint#15 unshieldedcpm 2.5 unshieldedcpm 184.5 shieldedcpm 3
shieldedcpm 148 netcpm 0.5 netcpm 36.5 TRUE staticpoint#16 unshieldedcpm 4
unshieldedcpm 154.5 shieldedcpm 3
shieldedcpm 133 netcpm 1
netcpm 21.5 TRUE staticpoint#17 unshieldedcpm 2
unshieldedcpm 93 shieldedcpm 3
shieldedcpm 91 netcpm 1
netcpm 2
TRUE staticpoint#18 unshieldedcpm 3.5 unshieldedcpm 183 shieldedcpm 3
shieldedcpm 151.5 netcpm 0.5 netcpm 31.5 TRUE staticpoint#19 unshieldedcpm 4
unshieldedcpm 165.5 shieldedcpm 3
shieldedcpm 150.5 netcpm 1
netcpm 15 TRUE staticpoint#20 unshieldedcpm 3
unshieldedcpm 157 shieldedcpm 3
shieldedcpm 140 netcpm 0
netcpm 17 TRUE staticpoint#21 unshieldedcpm 1
unshieldedcpm 95 shieldedcpm 3
shieldedcpm 85 netcpm 2
netcpm 10 TRUE
Appendix C - Zachry Engineering Center FSS Static Measurements and Health Physics Survey Data Summary
C4
Room61A SafeguardsLab,Class1 datafrom2minuteintegratedcounts Meetsrelease criteria?
staticpoint#1 unshieldedcpm 1.5 unshieldedcpm 200 shieldedcpm 3
shieldedcpm 144 netcpm 1.5 netcpm 56 TRUE staticpoint#2 unshieldedcpm 2
unshieldedcpm 203 shieldedcpm 3
shieldedcpm 144 netcpm 1
netcpm 59 TRUE staticpoint#3 unshieldedcpm 2
unshieldedcpm 202 shieldedcpm 3
shieldedcpm 140 netcpm 1
netcpm 62 TRUE staticpoint#4 unshieldedcpm 2
unshieldedcpm 159 shieldedcpm 3
shieldedcpm 125.5 netcpm 1
netcpm 33.5 TRUE staticpoint#5 unshieldedcpm 4
unshieldedcpm 159 shieldedcpm 3
shieldedcpm 140 netcpm 1
netcpm 19 TRUE staticpoint#6 unshieldedcpm 1.5 unshieldedcpm 149 shieldedcpm 3
shieldedcpm 127 netcpm 1.5 netcpm 22 TRUE staticpoint#7 unshieldedcpm 2.5 unshieldedcpm 154 shieldedcpm 3
shieldedcpm 143 netcpm 0.5 netcpm 11 TRUE staticpoint#8 unshieldedcpm 0.5 unshieldedcpm 173.5 shieldedcpm 3
shieldedcpm 126 netcpm 2.5 netcpm 47.5 TRUE staticpoint#9 unshieldedcpm 4
unshieldedcpm 110 shieldedcpm 3
shieldedcpm 93 netcpm 1
netcpm 17 TRUE staticpoint#10 unshieldedcpm 3.5 unshieldedcpm 123 shieldedcpm 3
shieldedcpm 86 netcpm 0.5 netcpm 37 TRUE staticpoint#11 unshieldedcpm 1.5 unshieldedcpm 156 shieldedcpm 3
shieldedcpm 148 netcpm 1.5 netcpm 8
TRUE
Appendix C - Zachry Engineering Center FSS Static Measurements and Health Physics Survey Data Summary
C5
staticpoint#12 unshieldedcpm 3
unshieldedcpm 176 shieldedcpm 3
shieldedcpm 137.5 netcpm 0
netcpm 38.5 TRUE staticpoint#13 unshieldedcpm 3
unshieldedcpm 165 shieldedcpm 3
shieldedcpm 125 netcpm 0
netcpm 40 TRUE staticpoint#14 unshieldedcpm 3
unshieldedcpm 137 shieldedcpm 3
shieldedcpm 135.5 netcpm 0
netcpm 1.5 TRUE staticpoint#15 unshieldedcpm 1.5 unshieldedcpm 109 shieldedcpm 3
shieldedcpm 101 netcpm 1.5 netcpm 8
TRUE staticpoint#16 unshieldedcpm 1.5 unshieldedcpm 106.5 shieldedcpm 3
shieldedcpm 94.5 netcpm 1.5 netcpm 12 TRUE staticpoint#17 unshieldedcpm 2
unshieldedcpm 122 shieldedcpm 3
shieldedcpm 89.5 netcpm 1
netcpm 32.5 TRUE staticpoint#18 unshieldedcpm 1.5 unshieldedcpm 104.5 shieldedcpm 3
shieldedcpm 126 netcpm 1.5 netcpm 21.5 TRUE staticpoint#19 unshieldedcpm 0.5 unshieldedcpm 146.5 shieldedcpm 3
shieldedcpm 77 netcpm 2.5 netcpm 69.5 TRUE staticpoint#20 unshieldedcpm 2.5 unshieldedcpm 165 shieldedcpm 3
shieldedcpm 156.5 netcpm 0.5 netcpm 8.5 TRUE
Appendix C - Zachry Engineering Center FSS Static Measurements and Health Physics Survey Data Summary
C6
Room61B ReactorRoom,Class1 datafrom2minuteintegratedcounts Meetsrelease criteria?
staticpoint#1 unshieldedcpm 3
unshieldedcpm 163 shieldedcpm 3
shieldedcpm 125 netcpm 0
netcpm 38 TRUE staticpoint#2 unshieldedcpm 3.5 unshieldedcpm 167 shieldedcpm 3
shieldedcpm 149 netcpm 0.5 netcpm 18 TRUE staticpoint#3 unshieldedcpm 4.5 unshieldedcpm 168 shieldedcpm 3
shieldedcpm 141 netcpm 1.5 netcpm 27 TRUE staticpoint#4 unshieldedcpm 5
unshieldedcpm 167.5 shieldedcpm 3
shieldedcpm 136.5 netcpm 2
netcpm 31 TRUE staticpoint#5 unshieldedcpm 3
unshieldedcpm 182.5 shieldedcpm 3
shieldedcpm 144 netcpm 0
netcpm 38.5 TRUE staticpoint#6 unshieldedcpm 2.5 unshieldedcpm 158 shieldedcpm 3
shieldedcpm 164.5 netcpm 0.5 netcpm 6.5 TRUE staticpoint#7 unshieldedcpm 2
unshieldedcpm 175.5 shieldedcpm 3
shieldedcpm 135.5 netcpm 1
netcpm 40 TRUE staticpoint#8 unshieldedcpm 2
unshieldedcpm 186 shieldedcpm 3
shieldedcpm 166.5 netcpm 1
netcpm 19.5 TRUE staticpoint#9 unshieldedcpm 1.5 unshieldedcpm 174 shieldedcpm 3
shieldedcpm 161.5 netcpm 1.5 netcpm 12.5 TRUE staticpoint#10 unshieldedcpm 3.5 unshieldedcpm 166 shieldedcpm 3
shieldedcpm 132 netcpm 0.5 netcpm 34 TRUE staticpoint#11 unshieldedcpm 1
unshieldedcpm 173 shieldedcpm 3
shieldedcpm 150.5 netcpm 2
netcpm 22.5 TRUE
Appendix C - Zachry Engineering Center FSS Static Measurements and Health Physics Survey Data Summary
C7
staticpoint#12 unshieldedcpm 0.5 unshieldedcpm 185.5 shieldedcpm 3
shieldedcpm 158 netcpm 2.5 netcpm 27.5 TRUE staticpoint#13 unshieldedcpm 2.5 unshieldedcpm 177.5 shieldedcpm 3
shieldedcpm 151 netcpm 0.5 netcpm 26.5 TRUE staticpoint#14 unshieldedcpm 3.5 unshieldedcpm 148.5 shieldedcpm 3.5 shieldedcpm 127 netcpm 0
netcpm 21.5 TRUE staticpoint#15 unshieldedcpm 4
unshieldedcpm 167 shieldedcpm 3
shieldedcpm 146.5 netcpm 1
netcpm 20.5 TRUE staticpoint#16 unshieldedcpm 6
unshieldedcpm 176 shieldedcpm 3
shieldedcpm 127.5 netcpm 3
netcpm 48.5 TRUE staticpoint#17 unshieldedcpm 5.5 unshieldedcpm 169 shieldedcpm 3
shieldedcpm 152 netcpm 2.5 netcpm 17 TRUE staticpoint#18 unshieldedcpm 4
unshieldedcpm 167.5 shieldedcpm 3
shieldedcpm 148.5 netcpm 1
netcpm 19 TRUE staticpoint#19 unshieldedcpm 3
unshieldedcpm 222.5 shieldedcpm 3
shieldedcpm 147 netcpm 0
netcpm 75.5 TRUE staticpoint#20 unshieldedcpm 1
unshieldedcpm 108.5 shieldedcpm 3
shieldedcpm 107.5 netcpm 2
netcpm 1
TRUE staticpoint#21 unshieldedcpm 2
unshieldedcpm 120 shieldedcpm 3
shieldedcpm 89 netcpm 1
netcpm 31 TRUE
Appendix C - Zachry Engineering Center FSS Static Measurements and Health Physics Survey Data Summary
C8
Room61A&BCeiling,Class2 datafrom2minuteintegratedcounts Meetsrelease criteria?
staticpoint#1 unshieldedcpm 2
unshieldedcpm 135 shieldedcpm 3
shieldedcpm 124.5 netcpm 1
netcpm 10.5 TRUE staticpoint#2 unshieldedcpm 1
unshieldedcpm 139 shieldedcpm 3
shieldedcpm 99 netcpm 2
netcpm 40 TRUE staticpoint#3 unshieldedcpm 2
unshieldedcpm 133 shieldedcpm 3
shieldedcpm 112 netcpm 1
netcpm 21 TRUE staticpoint#4 unshieldedcpm 1.5 unshieldedcpm 177 shieldedcpm 3
shieldedcpm 141 netcpm 1.5 netcpm 36 TRUE staticpoint#5 unshieldedcpm 2.5 unshieldedcpm 120.5 shieldedcpm 3
shieldedcpm 99 netcpm 0.5 netcpm 21.5 TRUE staticpoint#6 unshieldedcpm 1
unshieldedcpm 140 shieldedcpm 3
shieldedcpm 119.5 netcpm 2
netcpm 20.5 TRUE staticpoint#7 unshieldedcpm 1.5 unshieldedcpm 124.5 shieldedcpm 3.5 shieldedcpm 133.5 netcpm 2
netcpm 9
TRUE staticpoint#8 unshieldedcpm 3
unshieldedcpm 152 shieldedcpm 3
shieldedcpm 127 netcpm 0
netcpm 25 TRUE staticpoint#9 unshieldedcpm 4
unshieldedcpm 126 shieldedcpm 3
shieldedcpm 94 netcpm 1
netcpm 32 TRUE staticpoint#10 unshieldedcpm 0
unshieldedcpm 155.5 shieldedcpm 3
shieldedcpm 132.5 netcpm 3
netcpm 23 TRUE staticpoint#11 unshieldedcpm 1
unshieldedcpm 158 shieldedcpm 3
shieldedcpm 137.5 netcpm 2
netcpm 20.5 TRUE
Appendix C - Zachry Engineering Center FSS Static Measurements and Health Physics Survey Data Summary
C9
staticpoint#12 unshieldedcpm 1
unshieldedcpm 146.5 shieldedcpm 3
shieldedcpm 120 netcpm 2
netcpm 26.5 TRUE staticpoint#13 unshieldedcpm 1
unshieldedcpm 121.5 shieldedcpm 3
shieldedcpm 117 netcpm 2
netcpm 4.5 TRUE staticpoint#14 unshieldedcpm 3
unshieldedcpm 177 shieldedcpm 3
shieldedcpm 115.5 netcpm 0
netcpm 61.5 TRUE staticpoint#15 unshieldedcpm 3
unshieldedcpm 118 shieldedcpm 3
shieldedcpm 134.5 netcpm 0
netcpm 16.5 TRUE staticpoint#16 unshieldedcpm 2.5 unshieldedcpm 126.5 shieldedcpm 3.5 shieldedcpm 129.5 netcpm 1
netcpm 3
TRUE staticpoint#17 unshieldedcpm 2
unshieldedcpm 138.5 shieldedcpm 3
shieldedcpm 115.5 netcpm 1
netcpm 23 TRUE staticpoint#18 unshieldedcpm 1.5 unshieldedcpm 117.5 shieldedcpm 3
shieldedcpm 129.5 netcpm 1.5 netcpm 12 TRUE
Appendix C - Zachry Engineering Center FSS Static Measurements and Health Physics Survey Data Summary
C10
Room135,NFloor,AccelRoom,Class1 datafrom2minuteintegratedcounts Meetsrelease criteria?
staticpoint#1 unshieldedcpm 1
unshieldedcpm 149 shieldedcpm 3
shieldedcpm 86 netcpm 2
netcpm 63 TRUE staticpoint#2 unshieldedcpm 4
unshieldedcpm 167.5 shieldedcpm 3
shieldedcpm 110 netcpm 1
netcpm 57.5 TRUE staticpoint#3 unshieldedcpm 4
unshieldedcpm 140.5 shieldedcpm 3
shieldedcpm 116 netcpm 1
netcpm 24.5 TRUE staticpoint#4 unshieldedcpm 4.5 unshieldedcpm 153 shieldedcpm 3
shieldedcpm 105.5 netcpm 1.5 netcpm 47.5 TRUE staticpoint#5 unshieldedcpm 6
unshieldedcpm 157.5 shieldedcpm 3
shieldedcpm 99.5 netcpm 3
netcpm 58 TRUE staticpoint#6 unshieldedcpm 2
unshieldedcpm 140.5 shieldedcpm 3
shieldedcpm 103 netcpm 1
netcpm 37.5 TRUE staticpoint#7 unshieldedcpm 1
unshieldedcpm 148.5 shieldedcpm 3.5 shieldedcpm 111.5 netcpm 2.5 netcpm 37 TRUE staticpoint#8 unshieldedcpm 1.5 unshieldedcpm 198 shieldedcpm 3
shieldedcpm 102 netcpm 1.5 netcpm 96 TRUE staticpoint#9 unshieldedcpm 2.5 unshieldedcpm 148.5 shieldedcpm 3
shieldedcpm 111.5 netcpm 0.5 netcpm 37 TRUE staticpoint#10 unshieldedcpm 1.5 unshieldedcpm 136.5 shieldedcpm 3
shieldedcpm 90 netcpm 1.5 netcpm 46.5 TRUE staticpoint#11 unshieldedcpm 1.5 unshieldedcpm 153.5 shieldedcpm 3
shieldedcpm 102.5 netcpm 1.5 netcpm 51 TRUE
Appendix C - Zachry Engineering Center FSS Static Measurements and Health Physics Survey Data Summary
C11
staticpoint#12 unshieldedcpm 1.5 unshieldedcpm 144.5 shieldedcpm 3
shieldedcpm 101.5 netcpm 1.5 netcpm 43 TRUE staticpoint#13 unshieldedcpm 2.5 unshieldedcpm 135.5 shieldedcpm 3
shieldedcpm 104 netcpm 0.5 netcpm 31.5 TRUE staticpoint#14 unshieldedcpm 2.5 unshieldedcpm 138.5 shieldedcpm 3
shieldedcpm 98 netcpm 0.5 netcpm 40.5 TRUE staticpoint#15 unshieldedcpm 5
unshieldedcpm 132 shieldedcpm 3
shieldedcpm 107.5 netcpm 2
netcpm 24.5 TRUE staticpoint#16 unshieldedcpm 6
unshieldedcpm 144.5 shieldedcpm 3.5 shieldedcpm 109 netcpm 2.5 netcpm 35.5 TRUE staticpoint#17 unshieldedcpm 3
unshieldedcpm 199 shieldedcpm 3
shieldedcpm 181.5 netcpm 0
netcpm 17.5 TRUE staticpoint#18 unshieldedcpm 1.5 unshieldedcpm 153.5 shieldedcpm 3
shieldedcpm 102 netcpm 1.5 netcpm 51.5 TRUE
Appendix C - Zachry Engineering Center FSS Static Measurements and Health Physics Survey Data Summary
C12
Room135,SFloor,AccelRoom,Class1 datafrom2minuteintegratedcounts Meetsrelease criteria?
staticpoint#1 unshieldedcpm 2
unshieldedcpm 117 shieldedcpm 3
shieldedcpm 73 netcpm 1
netcpm 44 TRUE staticpoint#2 unshieldedcpm 3.5 unshieldedcpm 126 shieldedcpm 3
shieldedcpm 88.5 netcpm 0.5 netcpm 37.5 TRUE staticpoint#3 unshieldedcpm 3.5 unshieldedcpm 145.5 shieldedcpm 3
shieldedcpm 83.5 netcpm 0.5 netcpm 62 TRUE staticpoint#4 unshieldedcpm 1
unshieldedcpm 160.5 shieldedcpm 3
shieldedcpm 91.5 netcpm 2
netcpm 69 TRUE staticpoint#5 unshieldedcpm 2.5 unshieldedcpm 145.5 shieldedcpm 3
shieldedcpm 96 netcpm 0.5 netcpm 49.5 TRUE staticpoint#6 unshieldedcpm 1.5 unshieldedcpm 155.5 shieldedcpm 3
shieldedcpm 94 netcpm 1.5 netcpm 61.5 TRUE staticpoint#7 unshieldedcpm 3
unshieldedcpm 150.5 shieldedcpm 3.5 shieldedcpm 108.5 netcpm 0.5 netcpm 42 TRUE staticpoint#8 unshieldedcpm 2
unshieldedcpm 157.5 shieldedcpm 3
shieldedcpm 96 netcpm 1
netcpm 61.5 TRUE staticpoint#9 unshieldedcpm 3.5 unshieldedcpm 165.5 shieldedcpm 3
shieldedcpm 104 netcpm 0.5 netcpm 61.5 TRUE staticpoint#10 unshieldedcpm 1
unshieldedcpm 118 shieldedcpm 3
shieldedcpm 90.5 netcpm 2
netcpm 27.5 TRUE staticpoint#11 unshieldedcpm 2
unshieldedcpm 117 shieldedcpm 3
shieldedcpm 101.5 netcpm 1
netcpm 15.5 TRUE
Appendix C - Zachry Engineering Center FSS Static Measurements and Health Physics Survey Data Summary
C13 staticpoint#12 unshieldedcpm 1.5 unshieldedcpm 128 shieldedcpm 3
shieldedcpm 101 netcpm 1.5 netcpm 27 TRUE staticpoint#13 unshieldedcpm 0.5 unshieldedcpm 142 shieldedcpm 3
shieldedcpm 91.5 netcpm 2.5 netcpm 50.5 TRUE staticpoint#14 unshieldedcpm 4.5 unshieldedcpm 146 shieldedcpm 3.5 shieldedcpm 91.5 netcpm 1
netcpm 54.5 TRUE staticpoint#15 unshieldedcpm 1.5 unshieldedcpm 145 shieldedcpm 3
shieldedcpm 93 netcpm 1.5 netcpm 52 TRUE staticpoint#16 unshieldedcpm 4.5 unshieldedcpm 153.5 shieldedcpm 3
shieldedcpm 108 netcpm 1.5 netcpm 45.5 TRUE staticpoint#17 unshieldedcpm 2.5 unshieldedcpm 138 shieldedcpm 3
shieldedcpm 106.5 netcpm 0.5 netcpm 31.5 TRUE staticpoint#18 unshieldedcpm 1
unshieldedcpm 153.5 shieldedcpm 3
shieldedcpm 105.5 netcpm 2
netcpm 48 TRUE
Appendix C - Zachry Engineering Center FSS Static Measurements and Health Physics Survey Data Summary
C14
Room135,NCeiling,AccelRoom,Class2datafrom2minuteintegratedcounts Meetsrelease criteria?
staticpoint#1 unshieldedcpm 2.5 unshieldedcpm 107 shieldedcpm 3
shieldedcpm 84.5 netcpm 0.5 netcpm 22.5 TRUE staticpoint#2 unshieldedcpm 2
unshieldedcpm 96 shieldedcpm 3
shieldedcpm 92 netcpm 1
netcpm 4
TRUE staticpoint#3 unshieldedcpm 1
unshieldedcpm 102 shieldedcpm 3
shieldedcpm 96.5 netcpm 2
netcpm 5.5 TRUE staticpoint#4 unshieldedcpm 1.5 unshieldedcpm 100.5 shieldedcpm 3
shieldedcpm 105 netcpm 1.5 netcpm 4.5 TRUE staticpoint#5 unshieldedcpm 3
unshieldedcpm 96 shieldedcpm 3
shieldedcpm 116.5 netcpm 0
netcpm 20.5 TRUE staticpoint#6 unshieldedcpm 3
unshieldedcpm 90.5 shieldedcpm 3
shieldedcpm 82 netcpm 0
netcpm 8.5 TRUE staticpoint#7 unshieldedcpm 6.5 unshieldedcpm 107 shieldedcpm 3.5 shieldedcpm 102.5 netcpm 3
netcpm 4.5 TRUE staticpoint#8 unshieldedcpm 3
unshieldedcpm 102.5 shieldedcpm 3
shieldedcpm 100 netcpm 0
netcpm 2.5 TRUE staticpoint#9 unshieldedcpm 1.5 unshieldedcpm 91.5 shieldedcpm 3
shieldedcpm 79 netcpm 1.5 netcpm 12.5 TRUE staticpoint#10 unshieldedcpm 2
unshieldedcpm 101 shieldedcpm 3
shieldedcpm 93 netcpm 1
netcpm 8
TRUE staticpoint#11 unshieldedcpm 2
unshieldedcpm 94.5 shieldedcpm 3
shieldedcpm 94 netcpm 1
netcpm 0.5 TRUE
Appendix C - Zachry Engineering Center FSS Static Measurements and Health Physics Survey Data Summary
C15
staticpoint#12 unshieldedcpm 2
unshieldedcpm 82 shieldedcpm 3
shieldedcpm 90 netcpm 1
netcpm 8
TRUE staticpoint#13 unshieldedcpm 3.5 unshieldedcpm 102.5 shieldedcpm 3
shieldedcpm 88.5 netcpm 0.5 netcpm 14 TRUE staticpoint#14 unshieldedcpm 2.5 unshieldedcpm 96 shieldedcpm 3
shieldedcpm 89 netcpm 0.5 netcpm 7
TRUE staticpoint#15 unshieldedcpm 1.5 unshieldedcpm 95.5 shieldedcpm 3
shieldedcpm 94 netcpm 1.5 netcpm 1.5 TRUE staticpoint#16 unshieldedcpm 2.5 unshieldedcpm 101.5 shieldedcpm 3
shieldedcpm 108.5 netcpm 0.5 netcpm 7
TRUE staticpoint#17 unshieldedcpm 2
unshieldedcpm 89.5 shieldedcpm 3.5 shieldedcpm 88.5 netcpm 1.5 netcpm 1
TRUE staticpoint#18 unshieldedcpm 2
unshieldedcpm 92 shieldedcpm 3
shieldedcpm 92.5 netcpm 1
netcpm 0.5 TRUE
Appendix C - Zachry Engineering Center FSS Static Measurements and Health Physics Survey Data Summary
C16
Room135,SCeiling,AccelRoom,Class2datafrom2minuteintegratedcounts Meetsrelease criteria?
staticpoint#1 unshieldedcpm 0.5 unshieldedcpm 84.5 shieldedcpm 3
shieldedcpm 90.5 netcpm 2.5 netcpm 6
TRUE staticpoint#2 unshieldedcpm 2
unshieldedcpm 101.5 shieldedcpm 3
shieldedcpm 75.5 netcpm 1
netcpm 26 TRUE staticpoint#3 unshieldedcpm 2
unshieldedcpm 88.5 shieldedcpm 3
shieldedcpm 87 netcpm 1
netcpm 1.5 TRUE staticpoint#4 unshieldedcpm 1
unshieldedcpm 145 shieldedcpm 3
shieldedcpm 145.5 netcpm 2
netcpm 0.5 TRUE staticpoint#5 unshieldedcpm 2
unshieldedcpm 86.5 shieldedcpm 3
shieldedcpm 125.5 netcpm 1
netcpm 39 TRUE staticpoint#6 unshieldedcpm 2
unshieldedcpm 93.5 shieldedcpm 3
shieldedcpm 85 netcpm 1
netcpm 8.5 TRUE staticpoint#7 unshieldedcpm 2.5 unshieldedcpm 104.5 shieldedcpm 3.5 shieldedcpm 99.5 netcpm 1
netcpm 5
TRUE staticpoint#8 unshieldedcpm 0.5 unshieldedcpm 107 shieldedcpm 3
shieldedcpm 102.5 netcpm 2.5 netcpm 4.5 TRUE staticpoint#9 unshieldedcpm 0
unshieldedcpm 94 shieldedcpm 3
shieldedcpm 80.5 netcpm 3
netcpm 13.5 TRUE staticpoint#10 unshieldedcpm 1.5 unshieldedcpm 96 shieldedcpm 3
shieldedcpm 85.5 netcpm 1.5 netcpm 10.5 TRUE staticpoint#11 unshieldedcpm 3
unshieldedcpm 98 shieldedcpm 3
shieldedcpm 89.5 netcpm 0
netcpm 8.5 TRUE
Appendix C - Zachry Engineering Center FSS Static Measurements and Health Physics Survey Data Summary
C17
staticpoint#12 unshieldedcpm 2
unshieldedcpm 88 shieldedcpm 3
shieldedcpm 89.5 netcpm 1
netcpm 1.5 TRUE staticpoint#13 unshieldedcpm 3.5 unshieldedcpm 86.5 shieldedcpm 4
shieldedcpm 97 netcpm 0.5 netcpm 10.5 TRUE staticpoint#14 unshieldedcpm 2
unshieldedcpm 94 shieldedcpm 3
shieldedcpm 94.5 netcpm 1
netcpm 0.5 TRUE staticpoint#15 unshieldedcpm 1.5 unshieldedcpm 102.5 shieldedcpm 3
shieldedcpm 89.5 netcpm 1.5 netcpm 13 TRUE staticpoint#16 unshieldedcpm 1
unshieldedcpm 105.5 shieldedcpm 3
shieldedcpm 92 netcpm 2
netcpm 13.5 TRUE staticpoint#17 unshieldedcpm 1.5 unshieldedcpm 90.5 shieldedcpm 3
shieldedcpm 100 netcpm 1.5 netcpm 9.5 TRUE staticpoint#18 unshieldedcpm 3
unshieldedcpm 90 shieldedcpm 3
shieldedcpm 91.5 netcpm 0
netcpm 1.5 TRUE
Appendix C - Zachry Engineering Center FSS Static Measurements and Health Physics Survey Data Summary
C18
InstrumentandMeasurementInformationforhealthphysicssupportandscopingwork:
Allstaticmeasurementswere2minuteintegratedcounts.
Allinstrumentswereresponsecheckedatthestartandendofeachshift.
TheTAMURadiologicalSafetyProgramspecifiesaresidualcontaminationlimitsasfollows:
a.nodetectablecontaminationabovebackground,i.e.,notmorethantwice backgroundlevels b.thedeterminationofnodetectablecontaminationabovebackgroundmustbemadewitha detectorwhichhasbeenresponsecheckedwithinthepast12monthsandswhichissuitablefor measuringthetype(s)ofradiationexpected (page30ofthe2004revisiontotheRSPManual)
Thisdefinitionwasusedforhealthphysicssurveystodetermineareaandequipmentcontaminationstatus andformonitoringofpersonnel.
Instrumentation:
M2360scaler/ratemeter:
268494 M2360scaler/ratemeter:
202442 4393scint.Detector 268604 4393scint.Detector 182266 calibdue:
12/29/2016 calibdue:
12/7/2016 M2929Dualchannelscaler 99045 M3Ratemeter 269208 Detector:43101 133007 449GMpancakedetector ES0054 calibdue:
2/4/2017 calibdue:
6/28/2017 LudlumMeasurmentsModel449pancakeGMdetectorsandModel3scaler/ratemeterwereusedto evaluatesmallerareasinaccessbilewiththe4393detectors AllstaticmeasurementwerepreformedusingLudlumInstruments4393dualphosphordetectorsand Model2360scaler/ratemeters.
60Co(abetaemitter)istheselectedradionuclideofconcern,butgrossalphameasurementswerealso conducted
Appendix C - Zachry Engineering Center FSS Static Measurements and Health Physics Survey Data Summary
C19 MiscSurveyData,Class1Areas Meetsrelease criteria?
Room61Aglassreducer grosscpm 4
grosscpm 85 bkgcpm 3
bkgcpm 105 netcpm 1
netcpm 20 TRUE Room61Aglassdraintrap grosscpm 1
grosscpm 109 bkgcpm 3
bkgcpm 105 netcpm 2
netcpm 4
TRUE Room61Aglasselbow grosscpm 2
grosscpm 93 bkgcpm 3
bkgcpm 105 netcpm 1
netcpm 12 TRUE Room61A,glasselbow@twist grosscpm 4
grosscpm 99 bkgcpm 3
bkgcpm 105 netcpm 1
netcpm 6
TRUE Room61A,glassline unshieldedcpm 3
unshieldedcpm 102 shieldedcpm 3
shieldedcpm 105 netcpm 0
netcpm 3
TRUE Room61A,glassline@clamp unshieldedcpm 3
unshieldedcpm 83 shieldedcpm 3
shieldedcpm 105 netcpm 0
netcpm 22 TRUE Sixswipescollected:maximumcountrates=1ncpmalpha,4ncpmbetagamma.
Pipingandassociatedhardwarewasremovedanddisposedasnonradioactivewaste.
Room61Boverheadshieldplugunshieldedcpm 1
unshieldedcpm 81 shieldedcpm 1
shieldedcpm 74 netcpm 0
netcpm 7
TRUE Room61BsourceroomwellWunshieldedcpm 2
unshieldedcpm 84.5 (staticmeasurementatbottomshieldedcpm 3
shieldedcpm 86 netcpm 1
netcpm 1.5 TRUE Room61BsourceroomwellWunshieldedcpm 1
unshieldedcpm 63.5 (staticmeasurementatbottomshieldedcpm 3
shieldedcpm 70 netcpm 2
netcpm 6.5 TRUE Room61BsourceroomwellWunshieldedcpm 3.5 unshieldedcpm 70.5 (staticmeasurementatbottomshieldedcpm 3
shieldedcpm 67 netcpm 0.5 netcpm 3.5 TRUE
Appendix C - Zachry Engineering Center FSS Static Measurements and Health Physics Survey Data Summary
C20
Appendix C - Zachry Engineering Center FSS Static Measurements and Health Physics Survey Data Summary
C21 ExampleFieldSurveys:
ScopingsurveyinfoRoom135(AccelRoom)swipedata
ScopingsurveyinfoRooms61A&61B(SafeguardsLab&
ReactorRoom)Miscequipmentsurveydata
Appendix C - Zachry Engineering Center FSS Static Measurements and Health Physics Survey Data Summary
C22
ScopingsurveyinfoRoom61B(ReactorRoom)Storageareasource wells
Appendix C - Zachry Engineering Center FSS Static Measurements and Health Physics Survey Data Summary
C23 61BReactorRoom-Conduitpenetrationsurveys:initialandfollowup:
Appendix C - Zachry Engineering Center FSS Static Measurements and Health Physics Survey Data Summary
C24 Scopingsurveyinfo-Room135(AccelRoom)floorshieldplugpenetrationsoverthereactor: