秦山第二核电厂大修期间场所弱贯穿辐射调查

辐射防护 ›› 2019, Vol. 39 ›› Issue (4): 287-296.

秦山第二核电厂大修期间场所弱贯穿辐射调查

曾进忠¹, 韦应靖², 何俊男¹, 赵鹏飞¹, 刘立业², 王川¹, 张强¹, 谷伟刚², 湛昆¹, 刘杰¹

1.中核核电运行管理有限公司,浙江海盐 314300;
2.中国辐射防护研究院,太原 030006

收稿日期:2018-07-16 出版日期:2019-07-15 发布日期:2019-10-29
通讯作者: 韦应靖。E-mail:weiyj531@sina.com
作者简介:曾进忠(1972—),男,1993年毕业于南京工业学校电子技术应用专业,高级工程师。E-mail:zengjz@cnnp.com.cn

Investigation on weak penetration radiation in site during outagesin Qinshan phase II nuclear power plant

ZENG Jinzhong¹, WEI Yingjing², HE Junnan¹, ZHAO Pengfei¹, LIU Liye², WANG Chuan¹, ZHANG Qiang¹, GU Weigang², ZHAN Kun¹, LIU Jie¹

1.CNNC Nuclear Power Operations Management Co., Ltd., Zhejiang Haiyan 314300;
2.China Institute for Radiation Protection, Taiyuan 030006

Received:2018-07-16 Online:2019-07-15 Published:2019-10-29

摘要/Abstract

摘要： 在秦山第二核电厂多次大修期间,对泵类设备、反应堆换料水池、蒸汽发生器、阀门类设备的辐射源项和弱贯穿辐射进行了监测。这些设备表面主要沉积的是⁵⁸Co、⁶⁰Co、⁵⁴Mn、⁵¹Cr、⁹⁵Nb、⁹⁵Zr、¹²⁴Sb、⁵⁹Fe、⁵⁷Co和^110mAg等放射性核素,发射的β射线能量主要在100 keV~500 keV范围内。给出了所监测设备表面的$\dot{H}$·^*(10)、$\dot{H}$·′(0.07)和$\dot{H}$·′(3)值,3种泵类设备的$\dot{H}$·′(3)/$\dot{H}$·^*(10)平均值为1.31±0.09,$\dot{H}$·′(0.07)/$\dot{H}$·^*(10)平均值为7.8±0.4;蒸汽发生器热端衬板和冷端衬板的$\dot{H}$·′(3)/$\dot{H}$·^*(10)平均值为1.40±0.20,$\dot{H}$·′(0.07)/$\dot{H}$·^*(10)平均值为15.1±3.2;4种阀门类设备的$\dot{H}$·′(3)/$\dot{H}$·^*(10)平均值为1.32±0.17,$\dot{H}$·′(0.07)/$\dot{H}$·^*(10)的平均值为14.6±3.5;堆芯水池和换料水池的$\dot{H}$·′(3)/$\dot{H}$·^*(10)平均值为1.29±0.10,$\dot{H}$·′(0.07)/$\dot{H}$·^*(10)平均值为8.5±1.1。所有弱贯穿调查设备的$\dot{H}$·′(3)/$\dot{H}$·^*(10)总体平均值为1.32±0.12,$\dot{H}$·′(0.07)/$\dot{H}$·^*(10)总体平均值为11.4±4.1。结合测量结果,建议主泵、余排泵、蒸汽发生器检修人员和换料水池去污人员,开展眼晶体剂量和皮肤剂量监测。

关键词: 核电厂, 泵类设备, 反应堆换料水池, 蒸汽发生器, 弱贯穿辐射

Abstract: Radiation source and weak penetrating radiation from pumps, reactor refueling pools, steam generators and valves were monitored during several outages in Qin Shan phase II nuclear power plant. Radionuclides such as⁵⁸Co,⁶⁰Co,⁵⁴Mn,⁵¹Cr,⁹⁵Nb,⁹⁵Zr,¹²⁴Sb,⁵⁹Fe,⁵⁷Co and ^110mAg are mainly deposited on the surface of these devices. The emitted beta-ray energy is mainly in the range of 100 keV to 500 keV.$\dot{H}$·^*(10),$\dot{H}$·′(0.07) and $\dot{H}$·′(3) values on the surface of monitored equipment are given. The average value of $\dot{H}$·′(3)/$\dot{H}$·^*(10) of the three pumping equipment is 1.31±0.09,$\dot{H}$·′(0.07)/$\dot{H}$·^*(10) average is 7.8±0.4. The average value of$\dot{H}$·′(3)/$\dot{H}$·^*(10) of steam generator is 1.40±0.20,$\dot{H}$·′(0.07)/$\dot{H}$·^*(10) average is 15.1±3.2. The average values of $\dot{H}$·′(3)/$\dot{H}$·^*(10) of the four types of valve equipment is 1.32±0.17,$\dot{H}$·′(0.07)/$\dot{H}$·^*(10) average is 14.6±3.5. The average value of $\dot{H}$·′(3)/$\dot{H}$·^*(10) of the refueling cavity is 1.29±0.10,$\dot{H}$·′(0.07)/$\dot{H}$·^*(10) average is 8.5±1.1. The overall average value of $\dot{H}$·′(3)/$\dot{H}$·^*(10) of all weak penetrating radiation investigation equipment is 1.32±0.12,and the overall average value of $\dot{H}$·′(0.07)/$\dot{H}$·^*(10) is 11.4±4.1. Combined with the measurement results,it is suggested that the maintenance personnel in reactor coolant pump,the residual heat removal pump,and the steam generator should carry out the monitoring of ocular lens dose and skin dose, so should the decontamination personnel in the changing pool.

Key words: pump equipment, reactor refueling pool, steam generator, weak penetrating radiation

中图分类号:

TL75+1

曾进忠, 韦应靖, 何俊男, 赵鹏飞, 刘立业, 王川, 张强, 谷伟刚, 湛昆, 刘杰. 秦山第二核电厂大修期间场所弱贯穿辐射调查[J]. 辐射防护, 2019, 39(4): 287-296.

ZENG Jinzhong, WEI Yingjing, HE Junnan, ZHAO Pengfei, LIU Liye, WANG Chuan, ZHANG Qiang, GU Weigang, ZHAN Kun, LIU Jie. Investigation on weak penetration radiation in site during outagesin Qinshan phase II nuclear power plant[J]. RADIATION PROTECTION, 2019, 39(4): 287-296.

参考文献

[1] 李景云. 肢端剂量计和核设施弱贯穿辐射(主要是β辐射)的辐射防护监测[J]. 辐射防护,2003,23(5):300-307.
LI Jingyun. Extremity closemeter and radiation protection monitoring in nuclear installations for weakly penetrating radiation, especially beta radiation[J]. Radiation Protection, 2003,23(5):300-307.
[2] 韦应靖,赵鹏飞,倪伟,等.一些常用个人防护用品的弱贯穿辐射防护性能评价[J]. 辐射防护,2018,38(6):480-485.
WEI Yingjing,ZHAO Pengfei,NI Wei, et al. Evaluation of protection performance against weak penetration by some personal protective equipment[J]. Radiation Protection, 2018, 38(60):480-485.
[3] 杨俊武,杨茂春,顾景智,等. 大亚湾核电厂弱贯穿辐射监测评价[J]. 辐射防护,2006,26(3):137-142.
YANG Junwu, YANG Maochun, GU Jingzhi, et al. Weakly penetrating radiation monitoring and assessment at Daya Bay nuclear power plant[J]. Radiation Protection, 2006,26(3):137-142.
[4] 韦应靖,刘立业,赵鹏飞,等.秦山第二核电厂一回路稳压器弱贯穿辐射调查[J].中国辐射卫生,2019,28(1):76-79.
[5] 韦应靖,方登富,孙训,等. 一种基于薄塑料闪烁体探测器的定向剂量当量率监测仪研制[J]. 辐射防护,2019,39(1):7-12.
WEI Yingjing, FANG Dengfu, SUN Xun, et al. Development of a directional dose equivalent rate monitor based on thin plastic scintillation detector[J]. Radiation Protection, 2019, 39(1):7-12.
[6] 韦应靖,张强,李厚文,等. 核设施β-γ混合场中定向剂量当量率的现场监测方法[J]. 辐射防护,2019,39(1):1-6.
WEI Yingjing,ZHANG Qiang,LI Houwen,el al. The on-site monitoring method of directional dose equivalent rate H·′(0.07) in the β-γ mixed field of nuclear facilities[J]. Radiation Protection, 2019, 39(1):1-6.
[7] 王川,韦应靖,倪伟,等. 秦山第二核电厂阀门类设备弱贯穿辐射调查[J]. 辐射防护,2018,38(6):457-465.
WANG Chuan, WEI Yingjing, NI Wei, et al. Investigation on weak penetration radiation of valves in Qinshan phase Ⅱ nuclear power plant[J]. Radiation Protection, 2018,38(6):457-465.
[8] Heinzelmann M. Experiences and problems of skin irradiation at workplaces in germany[J]. Radiat Prot Dosim,1991,39:173.
[9] 中国医学科学院放射医学研究所. X、γ、β射线和电子束所致眼晶体剂量估算规范:WS/T 117—1999 [S]. 北京:中国标准出版社,1999.