The WRNM(wide range neutron monitoring)is a newly developed neutron monitoring channel which was initially conceived as a means to meet Regulatory Guide 1.97 requirements for post-accident neutron monitoring.The scope...The WRNM(wide range neutron monitoring)is a newly developed neutron monitoring channel which was initially conceived as a means to meet Regulatory Guide 1.97 requirements for post-accident neutron monitoring.The scope was expanded to include the startup monitoring function with the aim of replacing both the source and IRMs(intermediate range monitors)in BWRs(boiling water reactors).The WRNMs,consisting of a newly designed fixed incore regenerative sensor and new electronics,which include both counting and MSV(mean square voltage)channels,have been tested in several reactors and its capabilities have been confirmed.The channel will cover the neutron flux range from 103 nv to 1.5×103 nv;it has greater than 1 decade overlap between the counting and MSV channels.Because of the regenerative fissile coating the sensor,even though fixed incore,has a life of approximately 6.0 full power years in a 51 kW/L BWR and similar situation has been proposed for newly designed small modular reactor such as BWRX-300 of General Electric Hitachi reactor.展开更多
压水堆(pressurized water reactor,PWR)核电站一次侧运行水化学的优化控制是减少辐射剂量,防止关键设备腐蚀损伤,保持燃料性能的最经济、最有效的途径之一,其本质是通过水化学与设备材料的交互作用改善材料表面氧化膜的特性.综述了PWR...压水堆(pressurized water reactor,PWR)核电站一次侧运行水化学的优化控制是减少辐射剂量,防止关键设备腐蚀损伤,保持燃料性能的最经济、最有效的途径之一,其本质是通过水化学与设备材料的交互作用改善材料表面氧化膜的特性.综述了PWR核电站一次侧主冷却剂水化学与设备材料腐蚀损伤关系的研究现状及问题,介绍了近年来在PWR一次侧注Zn水化学(Zn-injected water chemistry,ZWC)方面的应用基础研究进展.展开更多
文摘The WRNM(wide range neutron monitoring)is a newly developed neutron monitoring channel which was initially conceived as a means to meet Regulatory Guide 1.97 requirements for post-accident neutron monitoring.The scope was expanded to include the startup monitoring function with the aim of replacing both the source and IRMs(intermediate range monitors)in BWRs(boiling water reactors).The WRNMs,consisting of a newly designed fixed incore regenerative sensor and new electronics,which include both counting and MSV(mean square voltage)channels,have been tested in several reactors and its capabilities have been confirmed.The channel will cover the neutron flux range from 103 nv to 1.5×103 nv;it has greater than 1 decade overlap between the counting and MSV channels.Because of the regenerative fissile coating the sensor,even though fixed incore,has a life of approximately 6.0 full power years in a 51 kW/L BWR and similar situation has been proposed for newly designed small modular reactor such as BWRX-300 of General Electric Hitachi reactor.
文摘压水堆(pressurized water reactor,PWR)核电站一次侧运行水化学的优化控制是减少辐射剂量,防止关键设备腐蚀损伤,保持燃料性能的最经济、最有效的途径之一,其本质是通过水化学与设备材料的交互作用改善材料表面氧化膜的特性.综述了PWR核电站一次侧主冷却剂水化学与设备材料腐蚀损伤关系的研究现状及问题,介绍了近年来在PWR一次侧注Zn水化学(Zn-injected water chemistry,ZWC)方面的应用基础研究进展.