Study of Delayed Neutron Emission in Slightly Super-Prompt-Critical System with Analog Monte Carlo Method

Q. L. XieChina Academy of Engineering Physics, Mianyang, Institute of Nuclear Physics and Chemistry P.O. Box 919-210, Mianyang 621900, China

X. Q. FanChina Academy of Engineering Physics, Mianyang, Institute of Nuclear Physics and Chemistry P.O. Box 919-210, Mianyang 621900, China

H. G. LiuChina Academy of Engineering Physics, Mianyang, Institute of Nuclear Physics and Chemistry P.O. Box 919-210, Mianyang 621900, China

C. D. YangChina Academy of Engineering Physics, Mianyang, Institute of Nuclear Physics and Chemistry P.O. Box 919-210, Mianyang 621900, China

R. F. HeChina Academy of Engineering Physics, Mianyang, Institute of Nuclear Physics and Chemistry P.O. Box 919-210, Mianyang 621900, China

Abstract

The burst initiation time and emission rate of delayed neutrons for the Godiva I assembly in the presence of a weak neutron source, which is 5[c-slash] above prompt criticality, were calculated using an analog Monte Carlo method. The initiation time of the simulation is consistent with the result of the experiment. The calculated emission rate of delayed neutrons is included, and an extended probability model of the initiation time is derived based on point kinetics, which well explains the experimental measurement.

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Study of Delayed Neutron Emission in Slightly Super-Prompt-Critical System with Analog Monte Carlo Method

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Study of Delayed Neutron Emission in Slightly Super-Prompt-Critical System with Analog Monte Carlo Method

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