200MW池式供热堆未能紧急停堆的预期瞬变事故分析

Analysis of ATWS Accidents for 200MW Deep Pool Heating Reactor

利用轻水堆系统通用的热工水力分析程序ＲＥＴＲＡＮ０２ ， 对２００ ＭＷ 池式供热堆的未能紧急停堆的预期瞬变（ＡＴＷＳ） 事故， 即断电ＡＴＷＳ 事故、误提棒ＡＴＷＳ 事故、外负荷丧失ＡＴＷＳ 事故等进行了计算和分析。结果表明， 在事故过程中， 主要参数没有超出允许范围； 不需任何设备动作和人员干预， 反应堆就能自动降功率， 进入热停堆状态并维持长期堆芯冷却， 具有较高的安全性。

The thermal hydrodynamic code RETRAN 02 is used for safety analysis of Anticipated Transients Without Scram (ATWS) accidents for the 200MW Deep Pool heating Reactor (DPR) These ATWS accidents are caused by loss of power,loss of load,and unexpected reactivity insertion The calculation results verify that the major parameters are well within the limits defined by safety criteria with sufficient safety margin,and neither extra safety facility nor human intervention is needed during all transients and accidents The reactor (DPR) itself is able to decrease its power and shut down by means of higher coolant temperature,and keep core cooling for a long term The conclusion is that the DPR has high level of inherent passive safety