BWR Loss of Coolant Integral Tests with Two Bundle Loop, (II) : Effect of ECCS Activation Modes on Thermal-Hydraulic Characteristics
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概要
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Simulation tests of a BWR loss-of-coolant accident (LOCA) by a postulated full size, double-ended break of a recirculation suction line were conducted using the Two Bundle Loop (TBL) with two full size, electrically heated bundles. In the tests, single failure of emer-gency core cooling systems (ECCSs) was assumed. The following results were obtained from the tests :<BR>(1) The rods heated up early in one of the two bundles, while heatup initiations were delayed in the other. The difference was observed for any ECCS activation mode.<BR>(2) The peak cladding temperature (PCT) of each bundle was expressed as a linear func-tion of integrated power during the heatup period.<BR>(3) The highest PCT in the tests was 861 K under the assumption of an HPCS (high pressure core spray) failure, which was well below the licensing limitation of 1, 473 K.
著者
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Naitoh Masanori
Energy Research Laboratory Hitachi Ltd.
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MURASE Michio
Energy Research Laboratory, Hitachi Ltd.
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