Microfission chambers loaded with highly enri-ched fissile materials are widely used for measuring power in reactors.The neutron sensitivity of the microfission chamber is a key parameter that determines the accuracy of the power measurement.To evaluate the performance of the FC4A microfission chamber,in this work,we intro-duced an accurate and validated model of the microfission chamber,a performed Monte Carlo simulation of the neutron sensitivity of the microfission chamber with GEANT4 code,and conducted an irradiation experiment on the neutron irradiation effect platform#3 of the Xi'an Pulsed Reactor.We compared the simulated sensitivity with the experimental results,which showed that the sen-sitivity obtained from the simulation was in good agree-ment with the experimental results.In addition,we studied the impact of the design parameters of the fission chamber on the calculated neutron sensitivity of the microfission chamber.

Ze-Peng Wu;Xin-Biao Jiang;Wen-Shou Zhang;Chun-Lei Su;Yong-Gang Zhang-Sun;Li-Hong Bao

State Key Laboratory of Simulation and Effect for Intense Pulse Radiation,Northwest Institute of Nuclear Technology,Xi'an 710024,China

核技术（英文版）

[1]Ze-Peng Wu;Xin-Biao Jiang;Wen-Shou Zhang;Chun-Lei Su;Yong-Gang Zhang-Sun;Li-Hong Bao-.Monte Carlo simulation of neutron sensitivity of microfission chamber in neutron flux measurement)[J].核技术（英文版）,2022(06):128-138

microfission,Microfission,enri,ched,fissile,FC4A,platform#3

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