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本文分析计算了200MW 低温核供热站堆芯裸露事故序列及其发生频率。低温核供热堆具有良好的固有安全性,因而其失水事故进展极其缓慢,即使在失去全部热阱情况下,两天之内不采取修复或站外补水等补救措施而导致的堆芯裸露频率低于2.6×10~(-10)/堆。年,若两天内采取修复或站外补水措施,堆芯裸露频率即降到可以忽略的1×10~(-12)/堆。年以下。
This paper analyzes and calculates the sequence and frequency of bare core accidents in a 200MW nuclear power plant. Low-temperature nuclear heating reactors have good intrinsic safety and therefore their water-loss incidents have progressed very slowly, leaving bare core exposed without remedial measures such as repairs or off-site replenishment within two days without full heat traps Frequency less than 2.6 × 10 ~ (-10) / heap. In the next two days, if the measures of repairing or replenishing water outside the station are taken, the bare core frequency will drop to 1 × 10 ~ (-12) / heap which can be neglected. Years or less.