ML22068A248
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| Issue date: | 03/05/2022 |
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Text
EFFLUENTMONITORINGAND ENVIRONMENTALSURVEILLANCEPROGRAMS
ANNUALREPORT
2021
(Revision0)
March5,2022
GEHitachiNuclearEnergy,LLC M220022 USNRC 3/5/2022
NOTICEANDDISCLAIMER
TheGEHitachiNuclearEnergy,LLC(GEH)preparedthisdocument.GEHandcontributorstothisdocumentdonot:
makeanywarrantyorrepresentation,expressedorimplied,thattheuseofanyinformationdisclosed maynotinfringeprivatelyownedrights;or
assumeresponsibilityforliabilityordamageofanykind,whichmayresultfromtheuseofany informationdisclosed.
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TABLEOFCONTENTS
TABLEOFCONTENTS.....................................................................................................................................................ii
LISTOFFIGURESANDTABLES.......................................................................................................................................iii
ABSTRACT.....................................................................................................................................................................iv
1.0INTRODUCTION
........................................................................................................................................................1
1.1 EffluentMonitoringProgram 1 1.2 EnvironmentalSurveillanceProgram 2
2.0EFFLUENTMONITORINGDATA................................................................................................................................4
EffluentData 4
3.0ENVIRONMENTALSURVEILLANCEDATA...............................................................................................................13
3.1 Groundwater 13 3.2 StreamBottomSediments 13 3.3 Vegetation 13 3.4 GammaMonitoring 13 3.5 AmbientAirMonitoring 13 3.6 GaseousEffluentMonitoring 13
4.0REFERENCES
...........................................................................................................................................................14
4.1 UnitedStatesNuclearRegulatoryCommission(USNRC)LicenseSNM960 14 4.2 UnitedStatesNuclearRegulatoryCommission(USNRC)LicenseR33 14 4.3 StateofCaliforniaRadiologicHealthBranchLicense001701 14
5.0DEVIATIONS...........................................................................................................................................................15
5.1 LostEnvironmentalDosimetryBadges 15
6.0
SUMMARY
.............................................................................................................................................................16
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LISTOFFIGURESANDTABLES
FigureNo.
1 TopographicMapOfVNC 2 SanitaryandIndustrialDischargeTreatmentFacility 3 WaterSamplingLocations 4 AirSamplingLocationsandGammaMonitoringPoints 5 AnalyticalResults,AirSamples 6 AnalyticalResults,StackMonitoring(Stack4,Bldg.102) 7 AnalyticalResults,StackMonitoring(Stack16,NTR) 8 AnalyticalResults,StackMonitoringComposite(AllExceptStacks4And16)
TableNo.
1 SampleCollectionSchedule 2 GroundwaterWellInformation 3 StackSpecifications 4 RadiologicalEffluentSamples 5 GroundWaterSamples 6 StreamBottomSedimentSamples 7 VegetationSamples 8 StormWaterSamples 9 DosimetryResults-GammaMonitoring 10 AmbientAirMonitoring
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ABSTRACT
Annual,2021 Thisreportpresentsthedatacollectedforthecalendaryearof2021.Theoriginalcopiesoflaboratoryreportsare onfileatVNC.
Treatedsanitaryandindustrialwastewaterwasdisposedofonsitebyanirrigationsystem.Nosurfacerunoffof sanitaryorindustrialwasteswasobservedduringthereportperiod.
Basedontheanalyticalresultsofradiologicalsamplescollectedfromlocationsonandoffsiteduringthereporting period,VNCisincompliancewithlicensesissuedbytheU.S.NuclearRegulatoryCommissionandCalifornia DepartmentofHealth,RadiologicHealthBranch.
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1.0INTRODUCTION
ThisreportsummarizesactivitiesperformedanddatacollectedfortheEffluentMonitoringandEnvironmental SurveillanceProgramsatVallecitosNuclearCenter(VNC).Section1.0presentsbackgroundinformation.Data collectedduringthereportingperiodispresentedinSection2.0through4.0.Thisreporthasbeenpreparedto demonstratecompliancewithstateandfederalrequirements.
TheVNCsiteisseveralhundredacresinsize.ItislocatedonthenorthernsideofVallecitosValleyasshownin Figure1,atopographicmapofVNCandthesurroundingarea.Mostofthesiteisundevelopedwithhillsrangingin elevationfromapproximately1,000to1,300feetabovemeansealevel.Approximately135acresinthesouthwest cornerandsituatedbetweenthe400and600foottopographiccontoursaredeveloped.Thegroundsurfaceof thisportionofthesiteslopestothesouthwest.
VNCutilizesthreedrainagesystems:industrial,sanitary,andstorm.Theindustrialandsanitarysystemsdischarge nonradeffluentintooneoffour50,000gallonretentionbasinslocatedinthesouthwestcornerofthesite(Figure 2).Thestormdrainagesystem,essentiallynaturalditches,dischargesstormwaterintoaditchparallelwith VallecitosRoad(StateRoute84).StormdrainsfromBuildings103,104,and106dischargetothewestdrainage ditch,whilesomestormdrainsintheBuilding102,105,200,and300areasdischargetotheeastdrainageditch.
AsshowninFigures2and3,theseditchesmergepriortoexitingthesouthwestcornerofthesite.
Groundwaterlevelsofthedevelopedsitevaryfrom2to3feetbelowgroundsurface(duringwinternear RetentionBasins2and3)to30to40feet(duringthesummernorthwestoftheroadleadingtothewatertank).A USGSgeologystudyshowsthatgroundwatergenerallyflowstowardthesouthwest.Thevelocityofgroundwater isestimatedbyUSGStobeabout0.01ft/dayinclaysto8ft/dayingravels.Inareaswheregravelswitha considerablemixtureofclay(mostofdevelopedsite)aresaturatedclosetothelandsurface,southwesterly movementoccursatanaveragerateofapproximately2ft/day1.
1.1 EffluentMonitoringProgram ThepurposeoftheEffluentMonitoringProgramistoensurethatVNCsitereleaselimitsforeffluentarenot exceeded.TheProgramincludesmeasuringradioactiveconstituentsinwaterdischargedthroughthesitesanitary andindustrialwastewatersystems.Measurementsaredeterminedbycollectingsamplesofeffluent.The scheduleofsamplecollectionispresentedinTable1.
TheUnitedStatesNuclearRegulatoryCommission(NRC)haveestablishedradiologicalreleaselimits.Theselimits arelistedin10CFR20,AppendixB.
EffluentCharacteristics EffluentdischargefromVNCismadeupofindustrialwastewaterandcleanwater.Dischargesofindustrial wastewaterconsistprimarilyofnoncontactcoolingwater.Thedischargesareeitherheldinoneofthreeavailable 50,000gallonretentionbasinsandorusedfornonpotablepurposes,suchaslandscapewatering.AfterJuly1st, 2003nodischargestosurfacewatershavebeenmadefromthesesources.Samplesarecollectedfromeachbasin priortodischargetoonsiteirrigation.Inaddition,samplesfromallbasindischargesareaccumulatedand analyzedatspecifiedintervalsforavarietyofconstituents.
Dischargesofcleanwaterconsistofstormwaterrunoffandsmallquantitiesofwaterknowntocontainno contaminants.ThesewatersflowdirectlytodrainageditchesthatenterVallecitosCreek.
SanitaryWasteHandling Sanitarywaste(sludge)iscollectedinanImhofftankbeforeundergoingsandfiltrationandchlorination(by additionofsodiumhypochloritesolution).Samplesofsanitarywaste(sludge)arecollectedbeforeeachImhoff Tankcleanout.TherewerenocleanoutsperformedontheImhofftankduring2020.Processedsanitary
1Adelayofover2yearsfromthenearestpostulatedspillpointtothesiteboundary.
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wastewaterissprayedontoVNCpropertybyanirrigationsysteminadesignatedarea(Figure2).Theprocedureis monitoredsothatnosurfacerunoffoccurs.
GaseousEffluentMonitoring
Severaloperationsatthesiteutilizeexhauststacks.Airiscollectedfromsingleormultipleoperatingareasviaa ventilationsystem.Theventilationsystemisgenerallycomprisedofductwork,particulatefiltrationsystems, blowers,andanexhauststack.Thegaseouseffluentismonitored.Thespecificationsofeachstackarelistedin Table3.
Thevarioussiteoperatinglicenses(SNM960,R33,andState001701)andfederalregulationsrequirethatthe gaseouseffluentsreleasedtounrestrictedareasbelimitedandcontrolledtomaintaintheconcentrationsof radioactivematerialintheunrestrictedareaaslowasreasonablyachievablebutatleastnogreaterthanthe valuesinAppendixB,TableIIof10CFR20.
Themethodbywhichreleasesaredeterminedtobewithintheselimitsistoestablishaveragereleaselimitsand controlvaluesforeachstackandthenmeasuretheaveragereleasesthroughmonitoringand/orsamplingofthe effluents.Thecontrolvaluesare,ingeneral,establishedas10%ofthelicensereleaselimits.
Bothsamplingandmonitoringtechniquesareusedtodeterminegaseouseffluentreleases.Releaseresults reportedtoregulatoryagenciesforparticulatesandhalogensareobtainedfromsamplingsystems.Noblegas resultsareobtainedfromchartsorelectronicintegratorsonmonitoringequipment.
TheCOMPLYcomputercodeisruntodeterminethedoseatthesiteboundaryfromannualairborneeffluents.
Thisevaluationwasformerlyrequiredwhen40CFR61SubpartIappliedtoNRClicensees,whichincludedVNC.The regulationwasamendedtoexcludeNRClicensees.However,VNChascontinuedtoruntheCOMPLYcodeto demonstratecompliancewiththeconstraintruleperRegulatoryGuide4.20and10CFR20.1101dandwithannual publicdoselimitsper10CFR20.1301,DoseLimitsforIndividualMembersofthePublic.
1.2 EnvironmentalSurveillanceProgram ThepurposeoftheEnvironmentalSurveillanceProgramistodetermineifdischargesfromVNCaredetectablein theenvironment.TheProgramincludesmeasuringradioactiveconstituentsinneighboringstreams,wells,and soilsatlocationsnearorbeyondthesiteperimeter.Samplesofgroundwater,streambottomsediments,and vegetationarecollected.ThescheduleofsamplecollectionispresentedinTable1.
GroundwaterMonitoring GroundwaterismonitoredbycollectingandanalyzingsamplesfromeightwellslocatedonornearVNC.Samples areanalyzedforradiologicalcontaminants.Wellidentificationnumbers,correspondingCaliforniaStateWell Numbers,anddescriptionsoflocationsarelistedinTable2.
VegetationMonitoring VegetationismonitoredbycollectingandanalyzingsamplesofvegetationattwolocationsdesignatedV2andVal IV.
Station Description V2 Easternmoststreamcrossingsouthboundaryofsite VALIV Westofsiteboundary,500feetdownLittleValleyRoad StreamBottomSedimentMonitoring StreambottomsedimentismonitoredbycollectingandanalyzingsamplesatonelocationdesignatedasS4.The locationisattheoutfalloftheretentionbasinsatsouthboundaryofsite.
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AirMonitoring Therearefourairmonitoringstations,designatedasA1throughA4,acrossthesite.Thestationsarepositioned approximately90apartaroundtheoperatingfacilitiesofthesite.Thelocationsofthestationsareshownin Figure4.
Tocollectsamples,eachstationisequippedwithamembranefilterandanactivatedcharcoalcartridge.Thefilter ischangedweekly2andcountedforgrossalphaandgrossbetaradiation.Thecartridgeisremovedandanalyzed onlyintheeventofasuspectedradioactiveiodinerelease.
GammaMonitoring Thereare20monitoringstationsonsiteformeasuringgammaradiationintheenvironment.Eachstationis constructedofasteelmailboxandequippedwithadosimeter.Thedosimeterissealedinplastic.Thedosimeters areexchangedannually.ThelocationsofthestationsareshowninFigure4.
Forreportingpurposes,thedosimetersaredistributedasfollows:
SouthBoundary Stations1,2,3 EastBoundary Stations4,5,6 NorthBoundary Stations7,12,13 WestBoundary Stations8,9,10,11 BackgroundDosimeters Stations14,15,16,17,18,19,20 Thedosimetervendorreportsthemeasurementsofeachdosimeteranddeterminesthebackground measurement.Backgroundisdeterminedbyusingadosimeterthathasbeenexposedtobackgroundradiationat thisfacilityandisfromthesamebatchofOSLmaterialasthedosimetersexposedatVNC.
1.3 LaboratoryAnalyses
OnsiteandexternallaboratoriesperformtheanalysesofsamplescollectedatVNCasrequiredfortheprograms.
Samplesanalyzedbytheonsitelaboratoryarereportedasmeasuredvalueorlessthanminimumdetectable activity(MDA)values,whilesamplesanalyzedbytheexternallaboratoriesarereportedasactualmeasuredvalues.
Valueswithinthestatisticalbackgroundmaybelistedaszeroorasapositiveornegativenumbers.Allanalyses areperformedusingapprovedUSEPAmethodologywithminimumsensitivitiesequaltoorlessthanpermitlimits.
AllrecordsofanalyticalresultsaremaintainedatVNC.
OnsiteLaboratoryAnalyses Thefollowinglistofanalysesareperformedbytheonsitelaboratory:
TotalAlphaEmittingRadioactivity TotalBetaEmittingRadioactivity OffsiteLaboratoryAnalyses Theexternallaboratoriesthathavebeencontractedtoanalyzesamplescollectedfortheprogramare:GEL, locatedinCharleston,SouthCarolina,toperformradiologicalanalysesonsamplesofwater,andDaviLab,located inHercules,California,toperformradiologicalanalysesonsamplesofwater,streambottomandvegetation.
2Duringdustyconditions,thefiltersarechangedasdeterminedbytheRMT,FacilitiesProtection.
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2.0EFFLUENTMONITORINGDATA
ThissectionpresentsthedischargeinformationandanalyticalresultsforsamplescollectedfortheEffluent MonitoringProgramduringthereportingperiod.
EffluentData ComplianceSummary Requiredsamplescollectedduringthereportingperiodandtheanalyticalresultsoftestsareincompliancewith Permitlimits.Treatedsanitaryandindustrialwastewaterwasdisposedofonsitebyanirrigationsystem.No surfacerunoffofsanitaryorindustrialwasteoccurredduringthereportperiod.
Basedontheanalyticalresultsofradiologicalsamplescollectedfromlocationsonandoffsiteduringthereporting period,VNCisincompliancewithalllicensesissuedbytheU.S.NuclearRegulatoryCommissionandCalifornia DepartmentofHealth,RadiologicHealthBranch.
NonradiologicalAnalyticalResults SummariesofdatarelatingtononradioactiveeffluentparametersaregiveninTable5through9.Theresults indicatethatallconstituentsofconcernareincompliancewithregulatorylimits.
Table4SampleAnalysis
Resultsofsamplingofindustrialeffluentwatersforradiologicalcontaminatespriortoreleasefromthepropertyis summarizedinTable4.TheVNChasnoradiologicalliquideffluentpathwaysandsamplingforradiological contaminationinindustrialeffluentisnotrequiredbytheStateofCalifornia.Theprovidedmonthlyspecific activitiesaresummedtotalsfromsamplestakenofdailywaterreleases.Entriesofzero(0)indicateresultsbelow thedetectionlimitsoflaboratoryinstruments.Noradiationwasdetectedthatexceededregulatorylimits.
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3.0ENVIRONMENTALSURVEILLANCEDATA
Thissectionpresentstheanalyticalresultsforsamplesofgroundwater,streambottomsediments,andvegetation collectedfortheEnvironmentalSurveillanceProgramduringthereportingperiod.
3.1 Groundwater AnalyticalresultsofgroundwatersamplescollectedfromthewellsasindicatedinTable2duringthereporting periodarelistedinTable5.
3.2 StreamBottomSediments AnalyticalresultsofstreambottomsedimentsamplescollectedduringthereportingperiodarelistedinTable6.
3.3 Vegetation AnalyticalresultsofvegetationsamplescollectedduringthereportingperiodarelistedinTable7.
3.4 GammaMonitoring TheresultsofgammamonitoringduringthereportingperiodarelistedinTable8.
3.5 AmbientAirMonitoring Analyticalresultsofenvironmentalairsamplescollectedduringthereportingperiodaregraphicallypresentedin Figure5,datainTable9.
3.6 GaseousEffluentMonitoring StackMonitoring Analyticalresultsofgaseouseffluentsamplescollectedforstackmonitoringduringthereportingperiodare graphicallypresentedinFigures6through8.
EffectiveDoseEquivalent ThecalculatedEffectiveDoseEquivalentatScreeningLevel2resultingfromtheannualmeasuredreleases,as calculatedbytheComplyCode,are:
PropertyLine 0.5mRem/yearduetoallemissions,and 3.4E04mRem/yearfromiodine.
SiteDevelopedArea 3.3mRem/yearduetoallemissions,and 2.3E03mRem/yearfromiodine.
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4.0REFERENCES
ThissectionhasthereferencesthatarerequiredtobemetbythisEnvironmentalMonitoringReport.
Licenses
4.1 UnitedStatesNuclearRegulatoryCommission(USNRC)LicenseSNM960
4.2 UnitedStatesNuclearRegulatoryCommission(USNRC)LicenseR33
4.3 StateofCaliforniaRadiologicHealthBranchLicense001701
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5.0DEVIATIONS
Thissectionpresentsanomalies,deficienciesordeviationinadherencetotheEffluentMonitoringand EnvironmentalSurveillanceProgramsatVNCforthereportingperiod.
5.1 LostEnvironmentalDosimetryBadges ConditionReportNumber38540.Badgenumber1wasnotfound.
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6.0
SUMMARY
ThissectionpresentsasummaryoftheresultsofthewaterMonitoringProgramforthereportingperiod.
Theanalyticalresultsofradiologicalsamplescollectedduringthereportingperiodindicatethateffluentdischarges fromVNCwereincompliancewithWaterPermitlimitsandairbornereleaseswereincompliancewithlicenses issuedbytheU.S.NuclearRegulatoryCommission.
Additionally,neithersurfacerunoffofprocessedsanitarywastewater,norindustrialwastewaterwasobserved.
TheEffluentMonitoringandEnvironmentalSurveillanceProgramscontinuetobeeffective.
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TABLE1.SAMPLECOLLECTIONSCHEDULE
Designation Constituent SampleType Frequency Location
E001andE002 GrossAlpha Grab Eachdischarge (Basin1-4) GrossBeta Grab Eachdischarge GrossAlpha Composite Monthly GrossBeta Composite Monthly
StationE003 GrossAlpha Grab Twiceeachhalfofreportingyear (StormWater) GrossBeta Grab Twiceeachhalfofreportingyear Tritium Grab Twiceeachhalfofreportingyear
S4 GrossAlpha Grab Annually,usuallyFirstweekinMay StreamBottom GrossBeta Grab Annually,usuallyFirstweekinMay (Sediments) Co60,Cs137
V2&VALIV GrossAlpha Grab Annually,usuallyFirstweekinApril (Vegetation) GrossBeta Grab Annually,usuallyFirstweekinApril
Groundwater GrossAlpha Grab Quarterly Wells GrossBeta Grab Quarterly Tritium Grab Quarterly Sr90 Grab Quarterly
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TABLE2-GROUNDWATERWELLINFORMATION
SiteWellNo. CaliforniaStateWellNo. LocationDescription GN 4S/1E2N1 SoutheastofBuilding105 GA 4S/1E10A1 SouthwestofBuilding102 GP 4S/1E10P3 0.6milessouthwestofsiteentranceonprivateproperty MW1 4S/1E3R2 Bldg.102ParkingLot MW7 4S/1E10G3 SouthwestfromBasins MW8 4S/1E2M01 SouthwestofGETRReactor MW9S 4S/1E2P1 SouthwestofEVESRandVBWRReactors MW9D 4S/1E2P2 SouthwestofEVESRandVBWRReactors EVESRSE NA 20fteastofEVESRatsouthwestexteriorcorner
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TABLE3-STACKSPECIFICATIONS
Flow Stack Height Diameter Rate Number Location ComponentsServiced (feetags) (inches) (cfm) 4 Bldg.102A RemoteHandlingOperation, 75 66 IsotopeProductionFacility, 36,302.6 Radiochemistry, RemoteHandlingOperations RadioactiveMaterialsStorage Room 12 Bldg.103 MetallurgyandCeramics 48 60 25,987.7 Laboratories, ChemistryLaboratories 16 Bldg.105 NuclearTestReactor 45 13.5x13.5 1,536.7
26 Area200 GeneralElectricTestReactor 29 19 NA (GETR) 30 WasteLiquidWasteEvaporator 25 13x17.75 2,988.8 Evaporator 34 WasteWasteStorageFacility 25 13x17.75 NA Storage (SandblastRoom)
37 HSFBunker BunkerAreaofHillsideStorage 40 35 NA Facility Notes:
ags-abovegroundsurface cfm-cubicfeetperminute Stacks26,34,and37didnotoperateduring2021.
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TABLE4-MONTHLYEFFLUENTSAMPLES,E002L ActionLevelsGrossAlpha(3.0x108µCi/cc=30pCi/l)GrossBeta(5.0x108µCi/cc=50pCi/l)
Contract Service Data Contract Service Data Monthly Effluent (Industrial) Monthly Effluent (Sanitary)
Composite Sample (pCi/L) Composite Sample (pCi/L)
Gross Gross Gross Alpha Gross Month Alpha Beta Tritium Beta Tritium January No Discharge No Discharge February 2.48 1.57 371 3.71 1.63 201 March 1.08 2.42 24 No Discharge April 1.84 6.14 413 No Discharge May 4.28 1.77 437 2.92 2.98 233 June ND 0.79 183 No Discharge July 3.23 1.85 444 No Discharge August 4.30 4.31 434 No Discharge September 1.55 2.52 26 No Discharge October 1.23 3.85 578 No Discharge November 4.96 4.16 531 No Discharge December 4.15 2.62 633 2.11 5.39 485
FootnotesforTable4:
[1] TherewerenosanitarydischargesmadeduringmonthsofJanuary,March,April,June,July,August,September,October, andNovember.
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TABLE5-QUARTERLYGROUNDWATERSAMPLES ActionLevelsGrossAlpha(3.0x108µCi/cc=30pCi/l)GrossBeta(5.0x108µCi/cc=50pCi/l)
Quarterly 4S/1E-2N1 (GN) 4S/1E-10A1 (GA) 4S/1E-10P3 (GP)
(pCi/L) (pCi/L) (pCi/L)
Month Gross Gross Gross Gross Alpha Beta Sr-90 Tritium Gross Alpha Beta Sr-90 Tritium Gross Alpha Beta Sr-90 Tritium February'21 1.80 1.37 0.05 469 3.86 2.06 0.30 112 2.60 2.12 0.10 604 May'21 3.95 1.35 0.44 41 2.11 1.60 0.32 808 1.19 4.00 0.32 478 August' 21 3.71 2.63 0.61 62 4.70 2.94 0.75 138 4.20 3.00 0.94 452 November' 21 2.51 3.09 0.00 445 4.08 2.90 0.81 246 4.89 1.71 0.70 405 Annual Average 2.99 2.11 0.28 254 3.69 2.38 0.55 326 3.22 2.71 0.52 485
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TABLE5-QUARTERLYGROUNDWATERSAMPLES ActionLevelsGrossAlpha(3.0x108µCi/cc=30pCi/l)GrossBeta(5.0x108µCi/cc=50pCi/l)
Quarterly Sample MW-8 (4S-1E2M01) MW-9S (4S-1E2P1)
(pCi/l) (pCi/l)
Gross Gross Gross Month Alpha Beta Sr-90 Tritium Gross Alpha Beta Sr-90 Tritium February' 21 1.90 1.49 0.35 619 1.85 1.62 0.51 200 May' 21 2.70 1.00 0.00 857 4.45 1.52 0.21 631 August' 21 4.56 2.80 0.58 467 4.90 2.46 0.65 453 November'21 4.59 2.66 0.65 398 0.98 3.64 0.13 161 Annual Average 3.44 1.99 0.40 585 3.05 2.31 0.38 361
Quarterly Sample MW-9D (4S-1E2P2) EVESR-SE (pCi/l) (pCi/l)
Gross Gross Gross Month Alpha Beta Sr-90 Tritium Gross Alpha Beta Sr-90 Tritium February' 21 1.21 1.05 0.65 286 3.84 1.74 0.00 190 May' 21 1.39 1.80 0.05 7 5.77 1.90 0.05 323 August' 21 4.77 3.13 0.81 108 4.38 2.72 0.71 0 November'21 2.77 3.35 0.16 204 2.23 2.95 0.16 304 Annual Average 2.54 2.33 0.42 151 4.06 2.33 0.23 204
Annual Sample MW-1 (1E-3R2) MW-7 (1E-10G3)
(pCi/l) (pCi/l)
Gross Alpha Gross Beta Sr-90 Tritium Gross Gross Sr-90 Tritium Month Alpha Beta May' 21 6.51 1.88 0.94 170 5.81 1.49 0.74 163
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TABLE6-STREAMBOTTOMSEDIMENTSAMPLES
Sample Gross Gross Cs137 Number DateCollected(Ci/g) (Ci/g) Co60(Ci/g)(Ci/g)
ActionLevel 30 N/A 8 15
S-4 4/30/2021 4.73 1.60 0.00 0.00
TABLE7-VEGETATIONSAMPLES
Sample Date Gross Gross Number Collected (Ci/g) (Ci/g)
Actionlevel 10 50
Val-2 3/21/2021 0.21 0.26
Val-IV 3/21/2021 0. 18 0.55
TABLE8-STORMWATER
Sample Gross Gross Number DateCollected(Ci/g) (Ci/g) Tritium(Ci/g)
ActionLevel 30 50 N/A
SW 1/28/2021 3.23 2.53 90
TABLE9-DOSIMETRYRESULTS M220022 USNRC 3/5/2022
GAMMAMONITORING 2021
Background
South Boundary East Boundary West Boundary North Boundary Dosimeters Station Station Station Station Station No. (mRem/yr) No. (mRem/yr) No. (mRem/yr) No. (mRem/yr) No. (mRem/yr) 1 Missing 4 76.9 7 81.4 8 83.8 14 78.9
2 79.2 5 77.5 12 80.8 9 70.1 15 86.3
3 78.6 6 85.3 13 81.3 10 72.2 16 77.2
11 81.3 17 85.1
18 79.7
19 72.8
Notes:
- Dose > Control Dosimeter 20 76.7
See Figure 4 for location.
The dosimeters at each station were collected on December 18, 2021.
Gross Values Represented (No background subtracted from control readings).
Control Dosimeter reads 91.0 mRem/yr (Control Badge is in building 102B).
TABLE10-AMBIENTAIRMONITORING ActionLevelsBeta(6.6x1014)Alpha(5.9x1014)
2021 ENVIRONMENTAL STATIONS, uCi/ml MONTH STATION ONE STATION TWO STATION THREE STATION FOUR (average) BETA ALPHA BETA ALPHA BETA ALPHA BETA ALPHA JAN 4.03E-14 7.66E-16 3.68E-14 1.00E-15 4.35E-14 8.96E-16 3.62E-14 8.28E-16 FEB 2.52E-14 7.30E-16 2.07E-14 4.25E-16 2.20E-14 5.02E-16 2.59E-14 8.73E-16 MAR 2.92E-14 6.60E-16 2.90E-14 8.15E-16 3.41E-14 8.90E-16 3.69E-14 1.07E-15 APR 3.01E-14 1.16E-15 2.80E-14 1.06E-15 4.00E-14 1.17E-15 4.12E-14 1.41E-15 MAY 1.57E-14 5.40E-16 1.26E-14 7.18E-16 2.31E-14 5.85E-16 2.51E-14 6.11E-16 JUN 9.39E-15 2.64E-16 9.54E-15 2.87E-16 1.48E-14 4.60E-16 1.49E-14 3.73E-16 JUL 1.84E-14 7.87E-16 1.73E-14 9.02E-16 2.17E-14 1.07E-15 1.96E-14 1.01E-15 AUG 2.43E-14 1.18E-15 1.92E-14 1.14E-15 2.37E-14 9.31E-16 2.53E-14 1.03E-15 SEP 3.35E-14 1.38E-15 2.87E-14 1.17E-15 3.90E-14 1.65E-15 3.44E-14 1.60E-15 OCT 3.09E-14 9.58E-16 2.98E-14 8.84E-16 3.66E-14 1.30E-15 3.02E-14 1.32E-15 NOV 3.04E-14 6.24E-16 3.92E-14 1.04E-15 3.35E-14 7.67E-16 2.95E-14 8.09E-16 DEC 5.46E-14 2.25E-15 6.47E-14 2.58E-15 5.53E-14 2.51E-15 4.81E-14 2.17E-15 AVERAGE 2.85E-14 9.41E-16 2.80E-14 1.00E-15 3.23E-14 1.06E-15 3.06E-14 1.09E-15
Notes: SeeFigure4forlocation SeeFigure5forgraphicalrepresentation Someindividualweeklyairsamplesexceededthegrossbetaactionlevels.Ineachcase,thesamplewasrecountedand analyzedviagammaspectroscopy.Noplantrelatedradionuclideswereidentified.