本工作建立了快堆缓发中子探测系统、快堆覆盖气体检测实验系统,改造和检修了破损探测实验回路。为快堆元件破损探测实验作了准备。缓发中子探测系统采用了新试制的BF_3正比计数管,改进了前置放大器的结构方案,可消除因潮湿引起的高压漏电干扰,提高了探测器的可靠性和灵敏度。 In this work, a fast reactor slow-release neutron detection system, a fast reactor-covered gas detection experiment system were established, and a damaged detection test circuit was rebuilt and overhauled. Prepared for the fast reactor element damage detection experiment. The delayed neutron detection system uses a new trial-made BF_3 proportional counter tube, which improves the structural scheme of the preamplifier and can eliminate the high-voltage leakage interference caused by moisture and improve the reliability and sensitivity of the detector.