核电厂安全壳喷射碎片问题研究

Research on containment jet induced debris of nuclear power plant

本文结合法规规范的要求,针对核电厂安全壳喷射碎片问题,在充分研究了国外试验和分析技术的基础上,提出了喷射碎片问题相关的碎片源项材料确定方法和一种通用的碎片喷射试验方案。基于工程经验安全壳内的所有材料都可能是碎片源项材料,可采用直接排除、破坏压力比对、喷射试验等方法来确定喷射造成的碎片数量和类型。破口喷射后的滞止压力与破口尺寸无关,喷射试验时应确保影响区域的球体半径与破口直径的比值L/D值一致。分析结果表明,温度越低滞止压力越大,因此喷射试验时应选取温度较低处的破口参数。可保守采用空气喷射的方法来开展喷射试验,空喷试验台架的储罐体积、喷嘴尺寸和初始压力配合选取后能满足试验模化准则要求。

For the issue of containment jet induced debris,according to the requirements of the codes and regulations,on the basis of full study of foreign tests and analysis techniques,this paper puts forward the de⁃bris source material determination and a general debris jet test scheme related to debris jet problem.The re⁃sults show that all materials in the containment may be debris source material,which can be directly elimi⁃nated,through destroyed pressure comparison and jet test to determine the number and type of debris caused by jet.The stagnation pressure after jet is independent of the size of the break,and the L/D(spherical radius of ZOI/break diameter)value should be ensured to be the same in injection test.The results show that the lower the temperature is,the higher the stagnation pressure is.Therefore,the break parameters at the lower temperature should be selected in the jet test.The air jet test can be carried out conservatively.The size of tank,nozzle and initial pressure of the air jet test bench can meet the test modeling criteria.