池壳式研究堆长期余热排出途径研究

Study of Heat Remove Approach for Tank in Pool Research Reactor during Long Time

大多数研究堆正常运行时冷却剂从上向下流过堆芯,流量反转和长期余热导出是面临的重要热工问题。池壳式布置常用于较高功率和较高压力的研究堆,堆本体采用压力壳方式,同时将压力壳浸入水池,这有利于采用非能动方式导出堆芯余热,并且在事故后的长期阶段,此类研究堆还有多种可能的余热导出方式。本文对池壳式研究堆长期余热导出途径进行了研究,分析了不同方式下的余热导出能力及堆芯安全状态,论证得到了一个较为安全、高效、简化的余热排出方案。

Flow inversion and residual heat removal is both important problem for research reactor, as during normal operation, coolant flow up to down in the core. Tank in pool layout is usually used in high power and high pressure research reactor, the process of those problems is more complicated. For these reactors, the pressure vessel is immerged in the reactor pool, it is better choosing passive residual heat removal method, during long time after shutdown, there are many method to remove residual heat. The heat removal method during long time for tank in pool research reactor was studied in the paper, many ways was researched for the ability of heat removal and safety of core, a more safe, efficient and simplified way was achieved in the paper.