Journal of Radiation Research and Radiation Processing, Volume. 41, Issue 3, 030601(2023)
Radiation protection for foreign body salvage work in primary of nuclear power plant
Figures & Tables(8)
Fig. 1. Physical and chemical transformation process of corrosion products
Fig. 2. Design of special transfer shielding device 1. Head plugs；2. Lug fixing buckle；3. Chain link buckle；4. Filter cartridge；5. Cabinet；6. Base fixing buckle；7. Latch；8. Push-pull handle；9. Pedestal；10. Brake；11. Mobile wheels；12. Flared shape
Fig. 3. schematic diagram of the high discharge waste storage container
Table 1. Radiation risk of foreign body salvage operation in one-loop
View tableView in ArticleTable 1. Radiation risk of foreign body salvage operation in one-loop
作业关键点
Assignment key points
辐射风险
Radiation risk
解决措施
Solution measures
异物出水
Foreign body out of the water
异物失去水体的屏蔽作用，附近区域的辐射水平会快速上升
The foreign body loses the shielding effect of the water body and the
radiation level in the nearby area will rise rapidly
设计专用的转运屏蔽装置
Design of special transit shields
异物转运
Foreign body transfer
转运过程会导致附近区域的辐射水平升高
The transshipment process can lead to elevated radiation levels in the
immediate area
划定转运隔离区域
Delineate the transfer
isolation area
异物贮存
Foreign body storage
异物导入至贮存容器后，会造成贮存容器附近的辐射水平升高
storage container will cause an increase in radiation levels in the vicinity of the storage container
设计高放废物贮存容器
Design of high discharge waste storage containers
Table 2. Nuclear power plant first circuit salvage foreign body out of water and transfer during the isolation area control requirements
View tableView in ArticleTable 2. Nuclear power plant first circuit salvage foreign body out of water and transfer during the isolation area control requirements
专用转运屏蔽装置接触剂量率
Posure dose rate
隔离区域范围和管控要求
Isolation area scope and control requirements
H*≤200 Sv/h 对2 m内的影响范围进行隔离，隔离区域内无关人员进行清场
Isolation of the impact area within 2 meters, the isolation of the area of irrelevant personnel to clear the field
200<H*≤600 Sv/h 对3 m内的影响范围进行隔离，隔离区域内无关人员进行清场
Isolation of the impact area within 3 meters, the isolation of the area of irrelevant personnel to clear the field
600<H*≤
1 000 Sv/h
对反应堆大厅进行隔离，隔离区域内无关人员进行清场
Isolation of the reactor's hall and clearing of extraneous personnel in the isolation area
H*>1 000 Sv/h 禁止出水，需要制定专门的处理方案（如先放至乏燃料水池内等）
Prohibit the discharge of water and require a special treatment plan (e.g., first release into the spent fuel pool, etc.)
Table 3. Shielding attenuation multiplier for storage containers and additional shielding sleeves
View tableView in ArticleTable 3. Shielding attenuation multiplier for storage containers and additional shielding sleeves
设备
Equipment
屏蔽层厚度
Shield
thickness
/ cm
屏蔽材料
Shielding materials
等效混凝土厚度
Equivalent
concrete thickness / cm
减弱倍数
Weakening multiplier
贮存容器
Storage containers
52 钢筋混凝土
Reinforced concrete
79.7 1.4×103 附加屏蔽套
Additional shielding sleeve
14 碳钢
Carbon Steel
46.5 2.696×105 贮存容器+附加屏蔽套Storage container +
additional shielding sleeve
52+14 钢筋混凝土+碳钢
Reinforced concrete + carbon steel
126.2 2.7×105
Table 4. Comparison of theoretical calculations and measured values
View tableView in ArticleTable 4. Comparison of theoretical calculations and measured values
接触剂量率
/ (mSv∙h-1)
Exposure dose rate
不使用屏蔽容器1 m处剂量率理论计算值 / (mSv∙h-1)
Theoretical calculation of dose rate at 1 m without shielding container
使用转运屏蔽容器剂量率（1 m处）理论计算值 / (μSv∙h-1)
Theoretical calculation of dose rate (at 1 m) using transit shielding container
实测值
/ (μSv∙h-1)
Measured value
使用高放废物容器贮存剂量率（1 m处）理论计算值 / (μSv∙h-1)
Theoretical calculation of dose rate (at 1 m) using high discharge waste containers for storage
实测值
/ (μSv∙h-1)
Measured value
1 300 13 13 11.6 9.3 8.6 >400 4 4 3.6 2.9 2.5
Tools
Get Citation
Copy Citation Text
Weiping XIE, Xihuan ZHAO, Hao CHEN, Quanli CHEN, Shenglong LIU. Radiation protection for foreign body salvage work in primary of nuclear power plant[J]. Journal of Radiation Research and Radiation Processing, 2023, 41(3): 030601
Paper Information
Category: Research Articles
Received: Aug. 1, 2022
Accepted: Sep. 7, 2022
Published Online: Jul. 24, 2023
The Author Email: XIE Weiping (xieweiping2008@163.com)
© Copyright 2018-2021 | Chinese Laser Press.
All Rights Reserved 沪ICP备15018463号-20