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KSNP+ 원자로덮개 5.5m 수직 낙하 시 원자로내부구조물 건전성 평가
남궁인(Ihn Namgung),정승하(Seung Ha Jeong),이대희(Dae Hee Lee),최택상(Taek Sang Choi) 대한기계학회 2003 대한기계학회 춘추학술대회 Vol.2003 No.11
Due to the application of Integrated Head Assembly (IHA) in KSNP+ reactor design, an investigation of<br/> reactor internals integrity is carried out to assure that the adoption of IHA does not affect the safety of reactor<br/> operation. One of the postulated accident events is the R.V. closure head fall from 5.5m high directly above<br/> the reactor vessel that may occur during the refueling operation. The analysis model consists of lumped mass<br/> elements of the entire reactor vessel and internals. Because of extreme load, separate elastic-plastic analyses<br/> are done for the members that undergo plastic deformation. The analysis verified that the stresses of the<br/> reactor internals and the fuel assemblies are within the bound of allowable stress limits and the integrity of the<br/> fuel assemblies is maintained.