快中子脉冲堆用快速响应保护仪

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Fast Response Safety Instrument of Fast Neutron Burst Reactor

Institute of Nuclear Physics and Chemistry, China Academy of Engineering Physics, Mianyang, Sichuan, 621900, China;National Engineering Research Center of Nuclear Technology Application in Industry, Mianyang, Sichuan, 621900, China

摘要: 为了保证快中子脉冲堆在爆发脉冲后迅速停堆,研制了快速响应保护仪。该仪器采用ST401快速响应塑料闪烁体配以GDB-44F型光电倍增管作为探测器,通过电流放大后输入触发器单元,在功率超过保护设定值后12μs内输出触发信号,触发主安全块在100ms内下降5mm,使堆处于深次临界状态。在CFBR-II堆的200余次脉冲运行中,快速响应保护仪触发主安全块下降5mm的时间小于90ms,保障了堆的安全。
- 快中子脉冲堆 /
- 快速响应 /
- 保护仪
Abstract: To ensure the fast neutron burst reactor being sub-critical state immediately after fission burst, a fast response safety instrument is developed. The instrument consists of scintillation detector, photomultiplier, preamplifier, amplifier and trigger. The trigger signal can be produced in 12μs after the preset threshold value is exceed, and then trigger the safety block to drop 5mm in 100ms. The instrument was applied at CFBR-II reactor, and has given out scram signal in time more than 200 times burst operation. The fast response safety instrument triggers safety block to drop 5mm less than 90ms to ensure the safety of reactor.
- Fast neutron burst reactor /
- Fast response /
- Safety instrument