• 辐射防护监测 •

### 乏燃料操作大厅的剂量场随屏蔽水位的变化研究

1. 1.苏州热工研究院有限公司,江苏 苏州 215004;
2.大亚湾核电运营管理有限责任公司,广东 深圳 518124
• 收稿日期:2019-11-13 出版日期:2021-03-20 发布日期:2021-05-07
• 作者简介:杨腊腊(1985—),女, 2009年毕业于山西大学热能与动力工程专业,2012年毕业于西安交通大学动力工程及工程热物理专业,获硕士学位,工程师。E-mail: yanglala@cgnpc.com.cn

### Study on variation of dose field with shielding water levels in spent fuel operating hall

YANG Lala1, LIU Shengyong2, YANG Xu1, CHEN Qiuyang1, GAO Yongjun1

1. 1. Suzhou Nuclear Power Research Institute, Jiangsu Suzhou 215004;
2. Daya Bay Nuclear Power Operations and Management Co. Ltd., Guangdong Shenzhen 518124
• Received:2019-11-13 Online:2021-03-20 Published:2021-05-07

Abstract: Under the accident conditions in which the spent fuel pool loses cooling capacity and water supply completely, the dose rate in the spent fuel operating hall of the pressurized water reactor nuclear power plant will gradually increase as the water level of the spent fuel pool decreases. In this paper, the spent fuel pool of a typical pressurized water reactor nuclear power plant is taken as the research object, and the QAD-CGGP program is used to calculate and analyze the distribution of the dose field in the spent fuel operating hall and its variation with the water level. The calculation results show that: (1) In the range of 3.786-7.736 m water layer thickness, the change of dose rate above operating platform with water layer thickness is not obvious. (2) The peak dose rate above spent fuel pool locates above the high-density grid area. (3)In the range of 3.436-4.736 m water layer thickness, the peak dose rate above spent fuel pool changes in the range of 0.914-288 μSv/h and increases exponentially with the decrease of the thickness of the shielded water layer, and dose rate above operating platform meet the radiation zoning requirements of the spent fuel operating hall. (4) The lowest shielding water level needed to meet the radiation zoning requirements of the spent fuel operating hall is +15.77 m.

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