压水堆工作场所模拟中子参考辐射场的建立

刘毅娜; 王志强; 李春娟; 刘蕴韬; 陈军; 李玮; 骆海龙

doi:10.7538/yzk.2020.youxian.0465

压水堆工作场所模拟中子参考辐射场的建立

中国原子能科学研究院计量测试部,计量与校准技术国防科技重点实验室,北京102413

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出版历程
- 刊出日期: 2020-12-19

Establishment of Simulated Neutron Reference Radiation Field for Workplaces of Pressurized Water Reactor

Radiation Metrology and Measurement Division, National Key Laboratory for Metrology and Calibration Techniques, China Institute of Atomic Energy, Beijing 102413, China

摘要

摘要: 利用串列加速器T(d,n)⁴He反应产生的14.8 MeV中子，以及适当的中子慢化散射装置建立了目前国内唯一的压水堆典型工作场所模拟中子参考辐射场。对不同中子慢化散射材料组合下的中子能谱及中子周围剂量当量进行了测量，并校准了2台典型结构的中子周围剂量当量率仪。将模拟中子参考辐射场下的校准因子和放射性核素中子源参考辐射场下的校准因子进行比较，发现放射性核素中子源参考辐射场下的校准因子明显偏高，且仪表类型不同，偏高的程度也有所区别，这主要是由于不同类型仪表的能量响应不同。相比之下，模拟中子参考辐射场更适合用于反应堆工作场所的中子剂量仪表的校准。
- 中子慢化散射装置 ,
- 模拟中子参考辐射场 ,
- 中子周围剂量当量率仪 ,
- 校准因子
Abstract: A simulated neutron reference field for typical workplaces of the pressurized water reactor was established with 14.8 MeV neutrons from T(d,n)⁴He reaction and a neutron moderating and scattering assembly. The neutron energy spectrum and ambient dose equivalent were measured with the assembly in different material combinations. Two typical neutron ambient dose rate meters were calibrated in this field. Calibration factors were compared with the results from the radionuclide neutron reference field. The results show that the calibration factors from the radionuclide neutron reference field are larger than the simulated neutron reference field, and different for two types of meters due to their energy responses. By contrast, the simulated neutron reference field is more appropriate to calibrate neutron dose meters which are used in reactor workplaces.
- neutron moderating and scattering assembly ,
- simulated neutron reference radiation field ,
- neutron ambient dose rate meter ,
- calibration factor

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参考文献(9)

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