辐射防护 ›› 2020, Vol. 40 ›› Issue (2): 115-119.

• 辐射防护方法 • 上一篇    下一篇

中放废物坑扩孔操作的石英砂屏蔽实践

刘登奎1,2, 张劲松1, 李振臣1, 徐江1   

  1. 1.中国核动力研究设计院,成都 610041;
    2.四川省退役治理工程实验室,成都 610041
  • 收稿日期:2019-08-16 发布日期:2020-05-15
  • 作者简介:刘登奎(1972—),男, 1997年7月本科毕业于山东矿业学院电子仪器及测量技术专业,2011年9月获得中国原子能科学研究院辐射防护与环境保护专业同等学力工学硕士学位,高级工程师。E-mail:512777938@qq.com

A shielding practice with silica sands for an intermediate level radioactive waste pit in order to enlarge the opening

LIU Dengkui1,2, ZHANG Jinsong1, LI Zhenchen1, XU Jiang1   

  1. 1. Nuclear Power Institute of China, Chengdu 610041;
    2. Sichuan Engineering Laboratory for Nuclear Facilities Decommissioning and Radwaste Management, Chengdu 610041
  • Received:2019-08-16 Published:2020-05-15

摘要: 为了回取小坑口废物坑中的废物,利用了石英砂的流动性和吸尘器的抽吸功能,用石英砂屏蔽表面辐射水平为4.28 Gy/h的坑内中放废物,将坑口辐射水平降至4.49 μGy/h 后,安全地实现了扩孔操作,实施屏蔽和拆除屏蔽过程都实现了远距离操作,极大降低了人员所受剂量,屏蔽实施与拆除操作人员的集体剂量仅为0.45人·mSv。

关键词: 中放废物坑, 石英砂, 屏蔽

Abstract: In order to retrieve the waste from a waste pit with small opening, the silica sands packaged in a canvas bag was used to shield the intermediate level waste (ILW). The shielding depth was calculated with QAD-CG, and the filling and retrieve of silica sands was well prepared and practiced. The dose rate at the opening was reduced from 4.28 Gy/h to 4.49 μGy/h. The waste retrieve work went on smoothly. The personnel collective dose to set and dismantle the silica sands shielding facility is 0.45 men·mSv in total.

Key words: intermediate level radioactive waste pit, silica sand, shielding

中图分类号: 

  • TL77