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我国尚无MOX燃料的工程经验,需开展大量的论证工作。以国内M310型堆芯为对象,对使用30%MOX燃料的堆芯燃料管理方案进行分析,比较含MOX燃料堆芯和全UO2堆芯的衰变热、乏燃料水池热负荷和堆芯裂变产物积存量的特性差异。结果表明,堆芯衰变热、乏燃料水池热负荷变化较小,都不会超过原来的15%,堆芯裂变产物积存量中少量核素偏差较大,135Xe、136Cs等超过40%,其余核素变化较小。研究表明,含MOX燃料堆芯的辐射特性存在一定差异,但变化非常有限,不会对电厂的运行和安全产生影响。
There is no MOX fuel engineering experience in our country, and a great deal of demonstration work needs to be carried out. Based on the domestic M310 core, the core fuel management scheme with 30% MOX fuel was analyzed to compare the decay heat of MOX fuel core and UO2 core, the thermal load of spent fuel pool and the accumulation of core fission products The difference in the amount of characteristics. The results show that the decay heat of the core and the change of the thermal load in the spent fuel pool are small, all of which will not exceed 15% of the original ones. A small amount of nuclides in the core fission product inventory deviate greatly, with 135Xe and 136Cs being more than 40% Change is smaller. Studies have shown that there are some differences in the radiation characteristics of MOX-containing fuel cores, but the changes are very limited and do not affect the operation and safety of power plants.