So the impact of fuel assemblies burn-up on core fissionneutronsource parameters shall be considered in the neutron transportation calculation.
因此，在中子输运计算中，必须考虑组件燃耗对堆芯的裂变中子源参数的影响。
2
For the neutron transportation calculation, accurate fissionneutronsource is the prerequisite and fundament ensuring that the calculation results are reliable.
在中子输运计算中，准确的裂变中子源是保证计算结果可靠性的前提和基础。
3
A numerical method of the statistics fluctuation problem of fission chains is studied for fission system driven by a weak neutronsource.