辐射防护 ›› 2018, Vol. 38 ›› Issue (6): 449-455.

• 剂量学基础 •    下一篇

HP(10)次级标准电离室几个重要性能测量及模拟计算

韦应靖1, 安世峰2, 谢文明2, 冯梅1, 张庆利1, 以恒冠1   

  1. 1.中国辐射防护研究院,太原 030006;
    2.辽宁红沿河核电有限公司,辽宁 大连 116319
  • 收稿日期:2018-04-09 出版日期:2018-11-20 发布日期:2020-07-21
  • 作者简介:韦应靖(1980—),男,2004年毕业于兰州大学核物理专业,2009年毕业于中国辐射防护研究院辐射防护及环境保护专业,获硕士学位,副研究员。E-mail:weiyj531@sina.com
  • 基金资助:
    国家自然科学基金资助项目(项目批准号:11605161)。

Measurement and simulation calculation for several important performances of HP (10) secondary standard ionization chamber

WEI Yingjing1, AN Shifeng2, XIE Wenming2, FENG Mei1, ZHANG Qingli1, YI Hengguan1   

  1. 1. China Institute for Radiation Protection, Taiyuan 030006;
    2. Liaoning Hongyanhe Nuclear Power Co., Ltd., Liaoning Dalian 116319
  • Received:2018-04-09 Online:2018-11-20 Published:2020-07-21

摘要: 介绍了T34035型Hp(10)次级标准电离室的结构和技术特性,实验测量了Hp(10)次级标准电离室的校准系数NH和修正因子k(R,α),并评定给出校准系数NH的相对扩展不确定度为4.6%(k=2),修正因子k(R,α)的相对扩展不确定度为6.0%(k=2)。在辐射质入射角≤75 °时,12~1 250 keV范围内能量响应好于±20%;个人剂量当量率非线性在100 μSv/h~3 Sv/h范围内好于±3%。采用 MCNP5模拟计算了该电离室对部分窄谱N系列和低空气比释动能L系列的k(R,α)值,结果表明计算值与实验测量值之间的相对误差在±6%范围内。说明该电离室性能满足次级标准电离室要求,可以直接用于Hp(10)量值的传递。

关键词: Hp(10)次级标准电离室, 校准系数NH, 修正因子k(R,α)

Abstract: The structure and technical characteristics of T34035 Hp (10) secondary standard ionization chamber are introduced. The calibration coefficient NH and correction factor k(R, α) of Hp (10) secondary standard ionization chamber are measured. The uncertainty of the calibration coefficient NH is 4.6% (k=2), and the uncertainty of the correction factor k(R, α) is 6% (k=2). When the radiation incident angle is less than 75 degrees, the energy response is better than ±20% in the range of 12 keV-1 250 keV, and the non-linearity of personal dose equivalent rate is better than ±3% in the range of 100 μSv/h-3 Sv/h. The k(R,α) values of some narrow spectrum N series and low air specific kinetic energy L series are simulated by MCNP5. The results show that the error between the calculated value and the measured value is within the range of ±6%. The ionization chamber meets the requirements of the secondary standard ionization chamber and can be used directly for the transmission of Hp (10) value.

Key words: Hp(10) secondary standard ionization chamber, calibration factor NH, correction factor k(R,α)

中图分类号: 

  • TL84