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Application of local monte carlo method in neutronics calculation of EAST radial neutron camera

Plasma Science and Technology 2022年第2期24卷 172-179页

作者： Liangsheng HUANG Liqun HU Luying NIU Mengjie ZHOU Bing HONG Kai LI Ruixue ZHANG Guoqiang ZHONG Institute of Plasma Physics Hefei Institutes of Physical ScienceChinese Academy of SciencesHefei 230031People's Republic of China University of Science and Technology of China Hefei 230026People's Republic of China Sichuan Engineering Laboratory for Nuclear Facilities Decommissioning and Radwaste Management Nuclear Power Institute of ChinaChengdu 610005People's Republic of China

The local monte carlo(LMC)method is used to solve the problems of deep penetration and long time in the neutronics calculation of the radial neutron camera(RNC)diagnostic system on the experimental advanced superconducting tokamak(EAST),and the radiation distribution of the RNC and the neutron flux at the detector positions of each channel are *** with the results calculated by the global variance reduction method,it is shown that the LMC calculation is reliable within the reasonable error *** calculation process of LMC is analyzed in detail,and the transport process of radiation particles is simulated in two *** the first step,an integrated neutronics model considering the complex window environment and a neutron source model based on EAST plasma shape are used to support the *** particle information on the equivalent surface is analyzed to evaluate the rationality of settings of equivalent surface source and *** on the characteristic that only a local geometric model is needed in the second step,it is shown that the LMC is an advantageous calculation method for the nuclear shielding design of tokamak diagnostic systems.

关键词： equivalent surface source radial neutron camera EAST local monte carlo method

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