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首页> 美国政府科技报告 >An Assessment of Residual Heat Removal and Containment Spray Pump Performance under Air and Debris Ingesting Conditions.
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An Assessment of Residual Heat Removal and Containment Spray Pump Performance under Air and Debris Ingesting Conditions.

机译：空气和碎屑吸收条件下余热排出和容纳喷雾泵性能的评估。

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This report presents an assessment of the performance of Residual Heat Removal (RHR) and Containment Spray (CS) pumps during the recirculation phase of reactor core and containment cooldown following a Loss-of-Coolant Accident (LOCA). The pumped fluid is expected to contain debris such as insulation and may ingest air depending on sump conditions. Findings show that for pumps at normal flow rates operating with sufficient Net Positive Suction Head (NPSH), pump performance degradation is negligible if air ingestion quantities are less than 2% by volume. If air ingestion quantities exceed this amount, degradation may be severe depending on pump design, speed and flow rate. Small quantities of air will increase NPSH requirements for these pumps. For the types and quantities of debris likely to be present in the recirculating fluid, pump performance degradation is expected to be negligible. In the event of shaft seal failure due to wear or loss of cooling fluid, seal safety bushings limit leakage rates.

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