Title of article
Safetyanalysisofmultiple-failureofpassivesafetysystemsinSBWR-1200SBLOCAOriginalResearchArticle
Author/Authors
Y.Xu، نويسنده , , M.Ishii، نويسنده , , M.A.Feltus، نويسنده ,
Issue Information
روزنامه با شماره پیاپی سال 2004
Pages
13
From page
107
To page
119
Abstract
Thedesignofthesimplifiedboilingwaterreactor(SBWR-1200)ischaracterizedbyutilizingfullypassivesafetysystems.Theemergencycorecoolingisrealizedbythegravitydrivencorecoolingsystem,andthedecayheatremovalisdonebythepassivecontainmentcoolingsystemandisolationcondensersystem.Allofthesystemshavemultipleunitsandcouldbepartiallyfailed.TheobjectiveofthispaperistoanalyzethesystemresponseunderthemultiplemalfunctionsofpassivesafetysystemsintheSBWR-1200.
Thechosenaccidentscenarioisasmallbreaklossofcoolantaccidentwithoneofthreegravitydrivencorecoolingsystemdrainlinesblockedandoneofthreepassivecontainmentcoolingsystemcondensersdisabled.AnintegraltesthasbeencarriedoutinthePUMAfacilityfor16h.Thefacilityisdesignedforlowpressure,longtermcoolingoperationwiththemultiplesafetyrelatedcomponents;therefore,ithastheflexibilitytodemonstratetheasymmetricormultiple-failureeffectswiththecombinationofdisabilityofsafetysystems.Thetestinitialconditionsat1MPa(150psi)areobtainedfromRELAP5/MOD3.2codesimulationfortheSBWR-1200withappropriatescalingconsiderations.
Comparisonshavebeenfirstmadebetweenthemultiple-failuretestandasingle-failuretestpreformedpreviously.Itshowsthatthecorehasbeencoveredwithliquidcoolantduringallofaccidenttransienteventhoughthereisanapparentcoolantinventoryreductioninthemultiple-failuretest.Thedecayheatremovalhasnosignificantdifferencebecausetheremainingtwopassivecontainmentcoolingcondensersincreasetheircoolingcapacities,andeventhedrywellpressureisslightlylowerduetothecoldwaterinjectionfromthesuppressionpool.Comparisonshavealsobeenmadebetweenthescaled-uptestdataandthecodesimulationattheprototypiclevel.TheprototypicsimulationisdonebyRELAP5/MOD3.2.Agreementsbetweenthecodesimulationandthescaled-uptestdataconfirmthecodeapplicabilityandthefacilityscalabilityforthisaccidentscenario.
Journal title
Nuclear Engineering and Design Eslah
Serial Year
2004
Journal title
Nuclear Engineering and Design Eslah
Record number
894727
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