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专利、报告等 Analysis of ECC delivery. [PWR]
ECC交付分析。[压水堆]
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作者:JA Block,PH Rothe,MW Fanning,CJ Crowley,GB Wallis 摘要:An analytical model for calculating the time-dependent rate of delivery of ECC water to the lower plenum is developed and compared with data obtained from a /sup 1///sub 15/-scale experimental apparatus simulating the cold legs, downcomer, and lower plenum regions of a PWR. The analysis considers several phenomena that may influence the refill stage of a LOCA, including reverse core steam flow and the heat transfer from initially superheated walls. Data from nominally steady-state, counter-current flow tests are used to determine three empirical coefficients that are then used unchanged in the analysis to calculate transient rates of lower plenum filling. The analytical model correctly predicts the effects of various geometric, hydraulic, and thermal parameters on the timing and rate of delivery of water to the lower plenum in the /sup 1///sub 15/-scale tests. |
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