ML21265A249
| ML21265A249 | |
| Person / Time | |
|---|---|
| Site: | Vallecitos Nuclear Center (R-033) |
| Issue date: | 09/22/2021 |
| From: | GE-Hitachi Nuclear Energy Americas |
| To: | Document Control Desk, Office of Nuclear Reactor Regulation |
| Shared Package | |
| ML21265A246 | List: |
| References | |
| M210108 | |
| Download: ML21265A249 (5) | |
Text
Vallecitos NRCNTRLicenseRenewalAuditQuestionsSet2 QUESTION001 1
Provideadescription(andillustration)oftheconfigurationofthesiteretentionbasin(s),asreferencedinSection4of thesubmittedEnvironmentalReport.
The2020VNCAnnualEffluentMonitoringReportcontainstheillustrationprovidedonpage2ofthisresponseandis availableinUSNRCAdamsrecordkeepingsystemunderAccession#ML21060B458.Thereporthasalsobeenuploaded totheGEH/NRCsharedreadingroom.AdditionalinformationontheretentionbasinscanbefoundintheVNC EnvironmentalMonitoringManual,themostrecentversionofwhichhasalsobeenprovidedinthereadingroom.
SanitarywastewateristreatedinanImhofftank,filteredthroughsandbeds,disinfected,andheldbrieflyinoneofthe retentionbasinswhereitistestedforcompliancewithdischargelimitsbeforeitisdischargedontoGEVNCsproperty bysprinklerirrigation.
Industrialwastewater,primarilyoncethroughnoncontactcoolingwaterfromNTR,thewasteevaporator(WEP),
machineshops,laboratoryequipment,andstormwaterisdraineddirectlytooneofthe60,000gallonretentionbasins, whereitispHadjusted,andtestedforcompliancewithdischargelimitsbeforeitisdischargedontoGEVNCsproperty bysprinklerirrigation.
Vallecitos NRCNTRLicenseRenewalAuditQuestionsSet2 QUESTION001 2
Vallecitos NRCNTRLicenseRenewalAuditQuestionsSet2 QUESTION002 1
Provideamoredetailedsummarydescriptionofmonitoringofcoolingwaterandanyothereffluentsdischargedtothe retentionbasinsreferencedinSection4ofthesubmittedEnvironmentalReport.
TheVNCEnvironmentalMonitoringManualhasbeenprovidedinthereadingroom.Section1.3oftheVNC EnvironmentalMonitoringManualcontainsthefollowinginformation:
1.3DescriptionofSamplingLocations Liquidwastefromthevariouslaboratoryfacilitiesisdividedintotwocategories:industrialandsanitary.Therearefour 60,000gallonretentionbasinsinthesystem,includingtheonereservedforsanitarywastewater.Allsiteeffluents,other thanstormdrains,arecollectedinthesebasinsandanalyzedpriortorelease.Oncereleasedfromthebasins,thiswater isrecycledbywayofanonsitesprinklerirrigationsystem.
Therearenoradioactiveliquideffluentsdischargedfromthefacility.Samplingofsources(tanks),effluentstreamsand theenvironmentareusedforconfirmingcontrolandensuringnomeasurableliquidradioactiveliquiddischarges.
1.3.1StationE001SanitaryWastewaterBasin1and4 Atanypointdownstreamfromthedisinfectionfacilitiesforthesanitarywastewater(Waste001),whereadequate disinfectionisassured,andpriortopumpingtothedesignatedsprayareaonsite.Sanitarywastewaterisdischarged throughagravitysystemtothesitesewagetreatmentfacilitywhichconsistsofanImhofftank,sandfilters,andawaste treatmentplantwhereitischlorinatedusingsodiumhypochlorite.CausticisaddedtothebasinforpHcontrolif necessaryandthendischargedviaasprinklersystemonthesouthwestquadrantofthesite.Basin4canbeusedwhen thereisequipmentfailureinbasin1orthereistoomuchwatertouseonlybasin1.
1.3.2StationE002IndustrialWastewaterBasinNo.s2and3.
AtanypointdownstreamfromthepHadjustmentbasinfortheindustrialwastewater/noncontactcoolingwatersystem (Waste002),andpriortopumpingfromtheretentionbasinstothedesignatedsprayareaonsite.Nonradioactive industrialwastewater,primarilynoncontactcoolingwater,isdischargedthroughagravitydrainsystemtothesite retentionbasins.Laboratoryliquidwastepotentiallycontainingradioactivematerialsisretainedinwastetanksinthe generatingfacilitieswhereitissolidifiedatthegeneratingsiteortransferredtotheliquidwasteevaporator(WEP).
1.3.3StationE003StormWaterRunoff Stormwaterrunoffisdefinedasanypointontheoutfallwherestormwater(Waste003)runsoffthesiteboundaryas opposedtoseepingintotheground.Waste003runsviatwomainditchesthatjointogetherandisdischargedtoan unnamedditchtributarytoVallecitosCreekatthesouthwesterncornerofthesite.
TheStormWaterPollutionPreventionPlan(SWPPP)annualreportprovidesadescriptionofpotentialsourcesthatmay beexpectedtoaddsignificantquantitiesofpollutantstostormwaterdischargesfromVNC.
Vallecitos NRCNTRLicenseRenewalAuditQuestionsSet2 QUESTION003 1
Provideasummaryofthelatestresultsfromtheenvironmentalmonitoringprogramincludingrecentmonitoringresults forsurfacewater,groundwater,andsediment;andadescriptionofthefrequencyofsampling.
The2020VNCAnnualEffluentMonitoringReportcontainsalloftherequestedinformation.Thisreportisavailablein USNRCAdamsrecordkeepingsystemunderAccession#ML21060B458.ThereporthasalsobeenuploadedtotheGEH/
NRCsharedreadingroom.
Vallecitos NRCNTRLicenseRenewalAuditQuestionsSet2 QUESTION004 1
Providethehistoryofanyinadvertentreleasesofliquideffluentstotheenvironmentfromthereactor(orstatement thatnosuchreleaseshaveoccurred).
TherehavebeennoinadvertentliquideffluentreleasesfromtheNTR.