ML23061A037
| ML23061A037 | |
| Person / Time | |
|---|---|
| Site: | 07000754 |
| Issue date: | 03/01/2023 |
| From: | GE Hitachi Nuclear Energy |
| To: | Office of Nuclear Material Safety and Safeguards |
| Shared Package | |
| ML23061A032 | List: |
| References | |
| M230031 | |
| Download: ML23061A037 (1) | |
Text
GEHitachiNuclearEnergy,LLC
EFFLUENTMONITORINGAND ENVIRONMENTALSURVEILLANCEPROGRAMS
2022ANNUALREPORT
March1,2023
M230031 USNRC 3/2/2023
i NOTICEANDDISCLAIMER
TheGEHitachiNuclearEnergy,LLC(GEH)preparedthisdocument.GEHandcontributorstothisdocumentdonot:
makeanywarrantyorrepresentation,expressedorimplied,thattheuseofanyinformationdisclosed maynotinfringeprivatelyownedrights;or
assume responsibility for liability or damage of any kind, which may result from the use of any informationdisclosed.
M230031 USNRC 3/2/2023
ii TABLEOFCONTENTS LISTOFFIGURESANDTABLES......................................................................................................................................iii ABSTRACT.....................................................................................................................................................................iv
1.0INTRODUCTION
.......................................................................................................................................................5 1.1 EffluentMonitoringProgram 5
1.2 EnvironmentalSurveillanceProgram 6
1.3 LaboratoryAnalyses 3
2.0EFFLUENTMONITORINGDATA................................................................................................................................8 2.1 WaterEffluent 4
2.2 AirEffluent 4
3.0ENVIRONMENTALSURVEILLANCEDATA.................................................................................................................9 3.1 Groundwater 9
3.2 StreamBottomSediments 9
3.3 Vegetation 9
3.4 GammaMonitoring 9
3.5 AmbientAirMonitoring 9
4.0REFERENCES
...........................................................................................................................................................10 5.0DEVIATIONS...........................................................................................................................................................11 5.1 SamplesNotTaken 7
5.2 SamplesExceeingActionLevels 7
6.0
SUMMARY
...............................................................................................................................................................8
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LISTOFFIGURESANDTABLES Figure Title Page 1
TopographicMapOfVNC 9
2 SanitaryandIndustrialDischargeTreatmentFacility 10 3
WaterSamplingLocations 11 4
AirSamplingLocationsandGammaMonitoringPoints 12
Table Title Page 1
SampleCollectionSchedule 13 2
GroundwaterWellInformation 14 3
StackSpecifications 15 4
MonthlyWaterEffluentSamples 16 5
GroundwaterSamples 17 6
StreamBottomSedimentSamples 19 7
VegetationSamples 19 8
GammaMonitoringDosimetryResults 20 9
AmbientAirMonitoring 21 10 StackAirMonitoringParticulates 22 11 StackAirMonitoringNobleGases 23 12 StackAirMonitoringHalogens 23
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iv ABSTRACT This report summarizes activities performed and data collected forthe EffluentMonitoring andEnvironmental SurveillanceProgramsatVallecitosNuclearCenter(VNC)duringthe2022calendaryear.Theprogramanalyzes water, air, sediment, and vegetation samples and measures radiological doses around the site perimeter for compliancewithregulatorylimits.
Basedontheanalyticalresultsofradiologicalsamplescollectedfromlocationsonandoffsiteduringthereporting period, VNC is compliant with all licenses issued by the U.S. Nuclear Regulatory Commission and California DepartmentofHealth,RadiologicHealthBranch.
CopiesoflaboratoryanalysisreportsareonfileatVNC.
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1.0INTRODUCTION
This report summarizes activities performed and data collected forthe EffluentMonitoring andEnvironmental SurveillanceProgramsatVallecitosNuclearCenter(VNC)duringthe2022calendaryear.Thisreporthasbeen prepared to demonstrate compliance with state and federal license requirements. Section 1.0 presents backgroundinformation,andsections2.0and3.0presentdatacollectedduringthemonitoringperiod.
VNCisseveralhundredacresinsize.ItislocatedonthenorthernsideofVallecitosValleyasshowninFigure1.
Mostofthesiteisundevelopedwithhillsranginginelevationfromapproximately1,000to1,300feetabovesea level.Approximately135acresinthesouthwestcornerandsituatedbetweenthe400and600foottopographic contoursaredeveloped.Thegroundsurfaceofthisportionofthesiteslopestothesouthwest.
VNCutilizesthreedrainagesystems:industrial,sanitary,andstorm.Theindustrialandsanitarysystemsdischarge effluentwaterintooneoffour50,000gallonretentionbasinslocatedinthesouthwestcornerofthesite(Figure 2).Thestormdrainagesystem,consistingofnaturalditches,dischargesstormwaterintoaditchparallelwith VallecitosRoad(StateRoute84).StormdrainsfromBuildings103,104,and106dischargetothewestdrainage ditch,andstormdrainsintheBuilding102,105,200,and300areasdischargetotheeastdrainageditch.Asshown inFigures2and3,theseditchesmergepriortoexitingthesouthwestcornerofthesite.Althoughincludedin previousreports,stormwatersampleanalysisresultsarenotincludedherein.Copiesoflaboratoryanalysisreports fromstormwatersamplesareonfileatVNC.
Groundwater levels of the developed site vary from 2 to 3 feet below ground surface (during winter near RetentionBasins2and3)to30to40feet(duringthesummernorthwestoftheroadleadingtothewatertank).A U.S.GeologicalSurvey(USGS)studyshowsthatgroundwatergenerallyflowstowardthesouthwest.Thevelocity ofgroundwaterisestimatedbyUSGStobeabout0.01ft/dayinclaysto8ft/dayingravels.Inareaswheregravels withaconsiderablemixtureofclay(mostofdevelopedsite)aresaturatedclosetothelandsurface,southwesterly movementoccursatanaveragerateofapproximately2ft/day1.
1.1 EffluentMonitoringProgram TheEffluentMonitoringProgramensuresthatVNCeffluentreleaselimitsarenotexceeded.TheProgramincludes measuring radioactive constituents in water discharged through the site sanitary and industrial wastewater systemsandairdischargedthroughbuildingexhauststacks.
TheUnitedStatesNuclearRegulatoryCommission(NRC)haveestablishedradiologicalreleaselimits.Theselimits arelistedin10CFR20,AppendixB.
WaterDischarges Effluent discharge from VNC is made up of industrial wastewater, sanitary wastewater, and clean water.
Measurementsaredeterminedbycollectingeffluentsamples.Thescheduleofsamplecollectionispresentedin Table1.
Dischargesofindustrialwastewaterconsistprimarilyofnoncontactcoolingwater.Thedischargesareheldinone ofthreeavailable50,000gallonretentionbasinsandorusedfornonpotablepurposes,suchasonsiteirrigation.
AfterJuly1st,2003nodischargestosurfacewaterhavebeenmadefromthesesources.Samplesarecollected from each basin prior to discharge to onsite irrigation. In addition, samples from all basin discharges are accumulatedandanalyzedatspecifiedintervalsforavarietyofconstituents.
Discharges of clean water consist of storm water runoff and small quantities of water with no known contaminants.ThesewatersflowdirectlytodrainageditchesthatenterVallecitosCreek.
1Adelayofover2yearsfromthenearestpostulatedspillpointtothesiteboundary.
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Sanitarywaste(sludge)iscollectedinanImhofftankbeforeundergoingsandfiltrationandchlorinationbyaddition ofsodiumhypochloritesolution.SludgesamplesarecollectedbeforeeachImhoffTankcleanout.Therewereno cleanoutsperformedontheImhofftankduring2022.Processedsanitarywastewaterisdischargedbyanonsite irrigationsysteminadesignatedarea(Figure2).Theprocedureismonitoredsothatnosurfacerunoffoccurs.
AirEffluentMonitoring SeveraloperationsatVNCuseexhauststacks,showninTable3.Airiscollectedfromsingleormultipleoperating areasviaaventilationsystem.Theventilationsystemisgenerallycomprisedofductwork,particulatefiltration systems,blowers,andanexhauststack.Theaireffluentismonitored.
Thevarioussiteoperatinglicenses(SNM960,R33,andState001701)andfederalregulationsrequirethatair effluentsreleasedtounrestrictedareasbelimitedandcontrolledtomaintaintheconcentrationsofradioactive material in the unrestricted area as low as reasonably achievable but at least no greater than the values in AppendixB,TableIIof10CFR20.
Releasesaredeterminedtobewithintheselimitsbyestablishingaveragereleaselimitsandcontrolvaluesforeach stackandmeasuringtheaveragereleasesthroughmonitoringand/orsamplingoftheeffluents.Thecontrolvalues aregenerallyestablishedas10%ofthelicensereleaselimits.
Samplingandmonitoringtechniquesareusedtodetermineaireffluentreleases.Samplingsystemsareusedto determineparticulateandhalogenreleases.Noblegasreleases,whichareprimarilyArgon41,areobtainedfrom chartsorelectronicintegratorsonmonitoringequipment.
TheCOMPLYcomputercodeisusedtodeterminethedoseatthesiteboundaryfromannualairborneeffluents.
Thisevaluationwasformerlyrequiredwhen40CFR61SubpartIappliedtoNRClicensees,whichincludedVNC.The regulation was since amended to exclude NRC licensees, but VNC continues to run the COMPLY code to demonstrate compliance with the constraint rule per Regulatory Guide 4.20 and 10CFR20.1101(d) to verify compliancewithannualpublicdoseper10CFR20.1301,DoseLimitsforIndividualMembersofthePublic.
1.2EnvironmentalSurveillanceProgram TheEnvironmentalSurveillanceProgramdeterminesifdischargesfromVNCaredetectableintheenvironment.
TheProgramincludesmeasuringradioactiveconstituentsinneighboringstreams,wells,andsoilsatlocationsnear orbeyondthesiteperimeter.Samplesofgroundwater,streambottomsediments,andvegetationarecollectedat periodicitiesshowninTable1.
GroundwaterMonitoring GroundwaterismonitoredbycollectingandanalyzingsamplesfromeightwellslocatedonornearVNC.Samples areanalyzedforradiologicalcontaminants.In2022,wellsweresampledquarterlyexceptforMW1andMW7, whicharesampledonanannualbasis.Abackgroundwell,MW10R,wasaddedin2022whichisalsosampledon anannualbasis.Wellidentificationnumbers,correspondingCaliforniaStateWellNumbers,anddescriptionsof locationsarelistedinTable2.WelllocationsareshowninFigure3.
VegetationMonitoring VegetationismonitoredbycollectingandanalyzingsamplesofvegetationattwolocationsdesignatedV2andVal IV.V2islocatedontheeasternmoststreamcrossingthesouthboundaryofVNC.VALIVislocatedwestofthe VNCboundary,about500feetdownLittleValleyRoad.
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StreamBottomSedimentMonitoring StreambottomsedimentismonitoredbycollectingandanalyzingsamplesatonelocationdesignatedasS4.S4is locatedattheoutfalloftheretentionbasinsatsouthboundaryofsite.
AirMonitoring There are four air monitoring stations at VNC designated as A1 through A4. The stations are positioned approximately90apartaroundtheoperatingfacilitiesofthesite.Thelocationsofthestationsareshownin Figure4.
Tocollectsamples,eachstationisequippedwithamembranefilterandanactivatedcharcoalcartridge.Thefilter ischangedweekly2andcountedforgrossalphaandgrossbetaradiation.Thecartridgeisremovedandanalyzed onlyintheeventofasuspectedradioactiveiodinerelease.
GammaMonitoring There are 20 monitoring stations on site for measuring gamma radiation in the environment. Each station is constructedofasteelmailboxcontainingadosimetersealedinplastic.Thedosimetersareexchangedannually.
ThelocationsofthestationsareshowninFigure4.
Forreportingpurposes,thedosimetersaredistributedasfollows:
SouthBoundary:Stations1through3 EastBoundary:Stations4through6 NorthBoundary:Stations7,12,and13 WestBoundary:Stations8through11 BackgroundDosimeters:Stations14through20 The dosimeter vendor (Landauer) reports the dose measurements of each dosimeter and determines the backgrounddosemeasurement.Backgroundisdeterminedusingdosimetersexposedtobackgroundradiationat VNCfromthesamebatchofOSLmaterialastheotherdosimetersexposedatVNC.
1.3LaboratoryAnalyses OnsiteandexternallaboratoriesperformtheanalysesofsamplescollectedatVNCasrequiredfortheprograms.
Samplesanalyzedarereportedasameasuredvalueoraslessthanminimumdetectableactivity(MDA)values.
Valueswithinthestatisticalbackgroundmaybelistedaszerooraspositiveornegativenumbers.Allanalysesare performedusingapprovedU.S.EnvironmentalProtectionAgencymethodologywithminimumsensitivitiesequal toorlessthanpermitlimits.RecordsofallanalyticalresultsaremaintainedatVNC.
OnsiteLaboratoryAnalyses TheonsitelaboratoryatVNCanalyzesfortotal(gross)alphaemittingradioactivityandtotal(gross)betaemitting radioactivity.
OffsiteLaboratoryAnalyses External laboratories contracted to analyze VNC samples are GEL Laboratories, located in Charleston, South Carolina,andDaviLabs,locatedinHercules,California.GELLaboratoriesperformsradiologicalanalysesonwater samples.DaviLabsperformsradiologicalanalysesonsamplesofwater,streambottomsamples,andvegetation.
2Duringdustyconditions,filtermaybechangedmorefrequentlyasdeterminedbyRadiologicalMonitoringTechnicians.
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2.0EFFLUENTMONITORINGDATA Effluentsamplescollectedduringthereportingperiodandtheanalyticalresultsoftestsdemonstratecompliance withpermitlimitsandairbornereleaselimits.Localactionlevelsforradioactivityareestablishedbasedona measurementabovebackgroundvariationatthe95%confidencelevel.
Treatedsanitaryandindustrialwastewaterwasdischargedviaanonsiteirrigationsystem.Nosurfacerunoffof sanitaryorindustrialwasteoccurredduringthereportingperiod.
Basedontheanalyticalresultsofradiologicalsamplescollectedfromlocationsonandoffsiteduringthereporting period, VNC is compliant with all licenses issued by the U.S. Nuclear Regulatory Commission and California DepartmentofHealth,RadiologicHealthBranch.
2.1WaterEffluent Resultsofsamplingofindustrialandsanitaryeffluentwaterforradiologicalcontaminatespriortoreleasefromthe propertyissummarizedinTable4.VNChasnoradiologicalliquideffluentpathwaysandsamplingforradiological contaminationinindustrialeffluentisnotrequiredbytheStateofCalifornia.Themonthlyspecificactivitiesare fromcompositesamplestakenofdailywaterreleases.
2.2AirEffluent AireffluentsaremonitoredateachstackshowninTable3.Analyticalresultsofstackairsamplesfromthestacks listedinTable3arelistedinTables10through12.
UsingtheparametersofTable3andTables10through12,thecalculatedEffectiveDoseEquivalentatScreening Level2resultingfromtheannualmeasuredreleases,ascalculatedbytheEPAsCOMPLYCode,are:
PropertyLine:
0.3mrem/yearduetoallemissions 8.1E05mrem/yearfromiodine SiteDevelopedArea:
1.8mrem/yearduetoallemissions,and 6.1E04mrem/yearfromiodine.
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3.0ENVIRONMENTALSURVEILLANCEDATA ThEnvironmentalSurveillanceprogramdeterminesifdischargesfromVNCaredetectableingroundwaterwells, neighboring streams, vegetation at locations near or beyond the site perimeter. Local action levels for radioactivityareestablishedbasedonameasurementabovebackgroundvariationatthe95%confidencelevel.
3.1Groundwater AnalyticalresultsofgroundwatersamplescollectedfromthemonitoringwellslistedinTable2arelistedinTable5.
3.2StreamBottomSediments AnalyticalresultsofstreambottomsedimentsamplesarelistedinTable6.
3.3Vegetation AnalyticalresultsofvegetationsamplescollectedarelistedinTable7.
3.4GammaMonitoring DoseresultsfromgammamonitoringarelistedinTable8.
3.5AmbientAirMonitoring AnalyticalresultsofenvironmentalairsamplescollectedareinTable9.
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4.0REFERENCES
LicensescontainingrequirementsforthisEnvironmentalMonitoringReportareasfollows:
- 1. UnitedStatesNuclearRegulatoryCommission(USNRC)LicenseSNM960
- 2. UnitedStatesNuclearRegulatoryCommission(USNRC)LicenseR3
- 3. StateofCaliforniaRadiologicHealthBranchLicense001701
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5.0DEVIATIONS This section presents anomalies, deficiencies, or deviations in adherence to the Effluent Monitoring and EnvironmentalSurveillanceProgramsatVNCforthe2022calendaryear.
5.1SamplesNotTaken Thefourthquarterwellsampleforwell4S/1E10A1(GA)wasnottakenbecausethewellwasdryatthetimeof sampling.
5.2SamplesExceedingActionLevels There were three air samples and one vegetation sample which exceeded local action levels. In these cases, resamplingandreanalysisisperformedbylocalproceduretoverifytheactivityincreaseisnotattributabletoVNC operations.
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6.0
SUMMARY
Basedonthe2022analyticalresultsofwater,air,sediment,andvegetationsamplesandmeasuredradiological doses around the VNC perimeter, VNC is compliant with all licenses issued by the U.S. Nuclear Regulatory Commission and California Department of Health, Radiologic Health Branch. The effluent monitoring and environmentalsurveillanceprogramsinplaceatVNCcontinuetobeeffective.
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Figure3.WaterSamplingLocations
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Figure4.AirSamplingLocationsandGammaMonitoringPoints
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TABLE1 SAMPLECOLLECTIONSCHEDULE
Location Constituent SampleType Frequency E001andE002 (Basin1-4)
GrossAlpha GrossBeta GrossAlpha GrossBeta Grab Grab Composite Composite Eachdischarge Eachdischarge Monthly Monthly S4 StreamBottom (Sediments)
GrossAlpha GrossBeta Co60,Cs137
Grab Grab Grab
Annually,usuallyfirstweekinMay Annually,usuallyfirstweekinMay Annually,usuallyfirstweekinMay
V2&VALIV (Vegetation)
GrossAlpha GrossBeta
Grab Grab
Annually,usuallyfirstweekinApril Annually,usuallyfirstweekinApril
Groundwater Wells GrossAlpha GrossBeta Tritium Sr90 Grab Grab Grab Grab Quarterly/Annually Quarterly/Annually Quarterly/Annually Quarterly/Annually
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18 TABLE2 GROUNDWATERWELLINFORMATION
SiteWellNumber CaliforniaStateWellNumber LocationDescription GN 4S/1E2N1 SoutheastofBuilding105 GA 4S/1E10A1 SouthwestofBuilding102 GP 4S/1E10P3 0.6milessouthwestofsiteentrance(privateproperty)
MW1 4S/1E3R2 Bldg.102ParkingLot MW7 4S/1E10G3 SouthwestfromBasins MW8 4S/1E2M01 SouthwestofGETRReactor MW9S 4S/1E2P1 SouthwestofEVESRandVBWRReactors MW9D 4S/1E2P2 SouthwestofEVESRandVBWRReactors EVESRSE N/A 20fteastofEVESRatsouthwestexteriorcorner MW10R (Background) 4S1E02L004 EastnortheastoftheGETR,EVESR,andVBWRReactors
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19 TABLE3 STACKSPECIFICATIONS
Stack Number Location ComponentsServiced Height (ftabove ground)
Diameter (in)
FlowRate (cfm) 4 Bldg.102A RemoteHandlingOperation IsotopeProductionFacility Radiochemistry RemoteHandling OperationsRadioactive MaterialsStorageRoom 75 66
37,292.6
12 Bldg.103 MetallurgyandCeramics Laboratories ChemistryLaboratories 48 60 28,012.0 16 Bldg.105 NuclearTestReactor 45 13.5x13.5 1,614.1 26 Area200 GeneralElectricTest Reactor(GETR) 29 19 4,927.8 30 Waste Evaporator LiquidWasteEvaporator 25 13x17.75 2,920.7 341 Waste Storage WasteStorageFacility (SandblastRoom) 25 13x17.75 N/A 371 HSFBunker BunkerAreaofHillside StorageFacility 40 35 N/A
1Stacks34and37didnotoperateduring2022
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20 TABLE4 MONTHLYWATEREFFLUENTSAMPLES
ActionLevels GrossAlpha:7.1pCi/L GrossBeta:7.1pCi/L Tritium:2000pCi/L
ContractedLaboratoryData
MonthlyEffluent(Industrial)
MonthlyEffluent(Sanitary)
(pCi/L)
(pCi/L)
Month GrossAlpha GrossBeta Tritium GrossAlpha GrossBeta Tritium January 3.15 1.26
<MDA 1.67 3.87 23 February 1.72 4.27 46 2.53 4.80 913 March 3.66 4.22 229 NoDischarges April NoDischarges NoDischarges May 4.65 4.25 236 3.15 3.15 539 June NoDischarges NoDischarges July 3.92 4.05 74 3.98 2.47 161 August 2.85 2.44 294 NoDischarges September NoDischarges NoDischarges October 4.29 2.98 146 NoDischarges November 4.80 1.41 374 NoDischarges December 2.62 1.73 352 2.32 2.80 231
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21 TABLE5 GROUNDWATERSAMPLES
ActionLevels GrossAlpha:7.1pCi/L GrossBeta:7.1pCi/L Tritium:2000pCi/L
4S/1E2N1(GN) 4S/1E10A1(GA) 4S/1E10P3(GP)
(pCi/L)
(pCi/L)
(pCi/L)
Month Gross Alpha Gross Beta Sr90 Tritium Gross Alpha Gross Beta Sr90 Tritium Gross Alpha Gross Beta Sr90 Tritium February 3.56 2.98 0.42 136 2.69 3.47 0.66 136 4.71 2.09 0.84 181 May 3.83 2.06 0.79
<MDA 4.82 3.13 1.77 469 5.37 4.03 1.98
<MDA August 4.40 3.48 0.75 228 4.90 4.56 0.73 31 3.99 4.12 1.05
<MDA November 2.45 3.36 0.55 649 Dry-NotSampled 4.66 1.82
<MDA
<MDA Annual Average 3.56 2.97 0.63 338 4.14 3.72 1.05 212 4.68 3.02 0.97 181
MW8(4S1E2M01)
MW9S(4S1E2P1)
(pCi/L)
(pCi/L)
Month Gross Alpha GrossBeta Sr90 Tritium Gross Alpha Gross Beta Sr90 Tritium February 1.95 2.41 0.52 725 3.95 2.5 0.63 726 May 4.94 5.96 0.45 194 4.90 2.59 1.87 566 August 4.36 3.64 0.84 331 2.82 4.71 0.51 308 November 1.13 4.43 1.37 539 3.96 0.16 0.76 363 AnnualAverage 3.10 4.11 0.80 447 3.91 2.49 0.94 491
MW9D(4S1E2P2)
EVESRSE
(pCi/L)
(pCi/L)
Month Gross Alpha GrossBeta Sr90 Tritium Gross Alpha Gross Beta Sr90 Tritium February 4.51 2.92 0.67 362 3.03 3.76 0.63 272 May 4.63 3.04 1.10 397 4.62 1.99 0.44 581 August 4.81 2.22 1.07 68 3.87 1.84 0.9 262 November 2.73 1.68 0.48 11 3.29 1.69 1.89 121 AnnualAverage 4.17 2.47 0.83 210 3.70 2.32 0.97 309
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22 TABLE5(CONTINUED)
GROUNDWATERSAMPLES
ActionLevels GrossAlpha:7.1pCi/L GrossBeta:7.1pCi/L Tritium:2000pCi/L
MW1(1E3R2)
MW7(1E10G3)
(pCi/L)
(pCi/L)
Month Gross Alpha Gross Beta Sr90 Tritium Gross Alpha Gross Beta Sr90 Tritium May 5.45 4.49 0.86 102 3.48 3.22 0.39 179
MW10R(1E02L004)
(pCi/L)
Month Gross Alpha Gross Beta Sr90 Tritium November 0.63 2.12 0.88
<MDA
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23 TABLE6 STREAMBOTTOMSEDIMENTSAMPLES
Sample Number Date Collected GrossAlpha (pCi/g)
GrossBeta (pCi/g)
Co60 (pCi/g)
Cs137 (pCi/g)
ActionLevel
11.00 15.00 N/A N/A S4 5/6/2022 10.84 13.17 0.039 0.097
TABLE7 VEGETATIONSAMPLES
Sample Number Date Collected GrossAlpha (pCi/g)
GrossBeta (pCi/g)
ActionLevel
2.40 9.30 V2 3/31/2022 2.701 4.32 VALIV 3/31/2022 0.31 4.40 Average
1.51 4.36 1SampleactivitiesexceedingactionlevelsarereanalyzedpertheVNCEnvironmentalMonitoringManual
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24 TABLE8 GAMMAMONITORINGDOSIMETRYRESULTS
SouthBoundary EastBoundary WestBoundary NorthBoundary
Background
Station (mRem/yr)
Station (mRem/yr)
Station (mRem/yr)
Station (mRem/yr)
Station (mRem/yr) 1 72.0 4
75.6 7
95.0*
8 73.8 14 73.0 2
78.0 5
73.9 12 75.5 9
75.7 15 77.7 3
79.6 6
72.7 13 87.2 10 78.0 16 74.0
11 77.7 17 78.3
18 76.6
19 77.1
20 66.3 Notes:
- DosegreaterthanControlDosimeter Dosimetercollectiondate:December20,2022 Grossvaluesshown(nobackgroundsubtraction)
Controldosimeterreads91.0mRem/yr(locatedinbuilding102B)
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25 TABLE9 AMBIENTAIRMONITORING
ActionLevels Beta:6.6x1014µCi/ml Alpha:5.9x1014µCi/ml
Activity(µCi/ml)
STATIONONE STATIONTWO STATIONTHREE STATIONFOUR
Beta Alpha Beta Alpha Beta Alpha Beta Alpha January 5.08E14 1.06E15 6.14E14 1.73E15 5.65E14 1.99E15 4.51E14 1.26E15 February 5.42E14 1.02E15 6.77E141 1.40E15 6.15E14 1.70E15 4.89E14 1.09E15 March 2.94E14 6.89E16 3.59E14 6.72E16 3.03E14 8.33E16 2.56E14 4.66E16 April 2.07E14 4.17E16 2.51E14 6.18E16 2.25E14 5.64E16 2.04E14 7.54E16 May 2.11E14 8.20E16 2.30E14 8.16E16 2.08E14 9.22E16 1.71E14 7.59E16 June 2.00E14 9.75E16 2.07E14 9.70E16 2.12E14 7.89E16 1.76E14 8.30E16 July 1.36E14 5.09E16 1.68E14 9.83E16 1.52E14 6.95E16 1.26E14 5.54E16 August 2.18E14 1.11E15 2.33E14 1.00E15 2.30E14 1.02E15 1.53E14 5.17E16 September 3.49E14 1.48E15 3.43E14 1.40E15 3.54E14 1.32E15 2.23E14 1.21E15 October 4.69E14 1.62E15 4.59E14 1.67E15 4.78E14 1.69E15 4.91E14 7.91E16 November 5.94E14 2.39E15 6.82E141 2.74E15 6.84E141 2.77E15 7.31E14 3.34E15 December 4.39E14 1.43E15 5.42E14 1.61E15 4.99E14 1.65E15 4.88E14 1.46E15 AVERAGE 3.47E14 1.13E15 3.97E14 1.30E15 3.77E14 1.33E15 3.30E14 1.09E15 1SampleactivitiesexceedingactionlevelsarereanalyzedperVNCprocedureVSS7.2,RadioactiveEffluentControl
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26 TABLE10 STACKAIRMONITORINGPARTICULATES
Activity(µCi)
STACK4 STACK12 STACK16 STACK26 STACK30
Beta Alpha Beta Alpha Beta Alpha Beta Alpha Beta Alpha January 7.61E01 1.31E02 1.38E01 2.43E03 6.35E02 5.86E04 StackNotinUse 1.21E02 1.17E04 February 9.99E01 6.37E03 1.79E01 1.12E03 5.20E02 6.81E04 StackNotinUse 1.20E02
<MDA March 7.08E01 3.89E03 1.43E01 1.31E03 3.90E02 8.71E04 StackNotinUse 1.18E02 1.46E04 April 7.34E01 2.84E03 9.00E02 1.12E03 2.34E02 3.97E04 StackNotinUse 1.11E02 1.46E04 May 1.44E00 1.91E02 1.25E01 3.36E03 2.31E02 4.73E04 StackNotinUse 1.39E02 1.20E03 June 9.56E01 1.52E02 9.74E02 5.24E03 2.89E02 1.46E03 StackNotinUse 1.63E02 5.26E04 July 8.33E01 1.13E02 9.76E02 6.54E03 2.03E02 1.01E03 StackNotinUse 1.31E02 1.20E03 August 1.08E00 1.38E02 1.53E01 7.47E03 3.39E02 1.53E03 StackNotinUse 1.70E02 7.60E04 September 1.23E00 1.01E02 1.25E01 6.91E03 3.49E02 1.29E03 8.23E02 2.55E03 1.58E02 9.35E04 October 9.01E01 1.84E02 2.13E01 8.79E03 5.40E02 1.66E03 1.39E01 4.80E03 7.82E02 1.11E03 November 1.03E00 3.69E02 1.38E01 9.16E03 7.31E02 3.02E03 1.10E01 3.67E03 2.91E02 1.37E03 December 6.44E01 1.36E02 1.16E01 5.79E03 1.18E01 2.37E03 2.29E01 8.80E04 2.94E02 8.19E04 TOTAL 1.13E01 1.66E01 1.61E00 5.92E02 5.65E01 1.54E02 3.54E01 1.19E02 2.60E01 8.33E03
M230031 USNRC 3/2/2023
27
TABLE11 STACKAIRMONITORING-NOBLEGASES
NobleGasActivity(Ci)
Month STACK16 January 1.51 February 7.36 March 5.54 April 2.20 May 4.16 June 8.12 July 6.82 August 9.18 September 6.08 October 8.21 November 4.85 December 2.82 TOTAL 66.86
TABLE12 STACKAIRMONITORING-HALOGENS
I131Activity(µCi)
STACK4 STACK12 STACK16 Annual Release
<MDA
<MDA 2.69