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
Pages
16
From page
117
To page
132
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
Serial Year
2003
Journal title
Nuclear Engineering and Design Eslah
Record number
894556
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