Title of article :
Predictionoffuelchannel—graphitegas-gapbehaviourinRBMKreactorsOriginalResearchArticle
Author/Authors :
K.L.Hopkinson، نويسنده , , B.J.Marsden، نويسنده , , G.Dundulis، نويسنده , , V. Kopustinskas، نويسنده , , Liaukonis، M. نويسنده , , J.Augutis، نويسنده , , E.Uspuras، نويسنده ,
Issue Information :
روزنامه با شماره پیاپی سال 2003
Abstract :
Tomaintainthermalcontactbetweenthefuelassemblyandthegraphitemoderator,RBMKdesignreactorsemploygraphitesplitrings,whicharealternativelytightonthepressuretubeortightonthegraphitebrickcentralbore.Thesplitinthegraphiteringsallowsahelium/nitrogengasmixturetoflowupthefuelchannel.Thispreventsoxidationofthegraphiteandcanbesampledtodetectpressuretubeleaks.Theinitialclearancebetweentheringsandpressuretubeorgraphitebrickisapproximately2.7mm(1.35mmeachside).Duetomaterialpropertychangesofthepressuretubesandgraphiteduringoperationofthereactor,thesizeoftheclearancebetweentheringsandthepressuretube/brick,calledthe“gas-gap”,varies.ClosureofthesegapshasbeenidentifiedasapossiblesafetycaseissuebyreactordesignersandbyindependentreviewscarriedoutaspartofTACISreviewsandaspartoftheIgnalinaSafetyAnalysisReport.Thereasonsforthisarethatgas-gapclosurewouldcausethepressuretubetobetightlygrippedbythegraphitebricksviathesplitrings,whichcouldleadto:
Journal title :
Nuclear Engineering and Design Eslah
Journal title :
Nuclear Engineering and Design Eslah
