Title of article :
Therelationshipbetweenirradiationinduceddimensionalchangeandthecoefficientofthermalexpansion:amodifiedSimmonsrelationshipOriginalResearchArticle
Author/Authors :
GHall، نويسنده , , B.JMarsden، نويسنده , , S.LFok، نويسنده , , JSmart، نويسنده ,
Issue Information :
روزنامه با شماره پیاپی سال 2003
Abstract :
the1960s,atheoreticalrelationshipbetweenthedimensionalchangesandthecoefficientofthermalexpansionofirradiatedgraphitewasderivedbyJ.H.W.Simmons.Thetheorywasshowntobecomparablewithexperimentalobservationsatlowirradiationdoses,butshowntodivergeathigherirradiationdoses.However,variousmodifiedversionsofthistheoryhavebeenusedasthefoundationofdesignandlifepredictioncalculationsforgraphite-moderatedreactors.
Thispaperre-examinestheSimmonsrelationship,summarisingitsderivationandassumptions.Therelationshipwasthenmodifiedtoincorporatethehighdose,highstrainchangesthatwereassumedtoberepresentedinthechangesinYoung’smoduluswithirradiationdose.Byscrutinisingthebehaviouroffiniteelementanalyses,itwaspossibletouseamodifiedSimmonsrelationshiptopredictthedimensionalchangesofanisotropicandanisotropicgraphitetohighirradiationdoses.
Theseissuesareimportanttopresenthigh-temperaturereactors(HTRs)asthelifeofHTRgraphitecomponentsisdependentupontheirdimensionalchangebehaviour.Agreaterunderstandingofthisbehaviourwillhelpintheselectionanddevelopmentofgraphitematerials.
Journal title :
Nuclear Engineering and Design Eslah
Journal title :
Nuclear Engineering and Design Eslah
