The objective of this study is to determine if a circumferential rupture in the hot leg piping just downstream of the block valve, accompanied by complete lateral displacement of the pipe ends such that the exhaust flows do not oppose each other, will result in excessive pressure differentials across the reactor core.nA secondary objective of this study is to validate the conclusions of Study IV-303-2, in which a complete circumferential failure downstream of the attemperator was considered. This validation is necessary because of design changes in the attemperator.
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