Table of Content

20 February 2017 Volume 37 Issue 1

  

Process Research and Related Equipment Design for Primary Loop Related Water Filter Cartridge Replacement and Transport of AP1000 Nuclear Power Unit

You Xiangfei, Gu Zhouzhou, Meng Lei Xing Jiansheng

RADIATION PROTECTION BULLETIN. 2017, 37(1):  1-7. 

Abstract ( 20 )  

References | Related Articles | Metrics

On the basis of a brief introduction of AP1000 Nuclear Power Unit primary loop related water filters and related equipments, the whole operation process of taking out a spent filter cartridge from its container, transferring it to the storage area and installing a new one was studied and analyzed. A reasonable and feasible filter cartridge replacing and transporting operation process was then proposed, and the related equipment design performed at the same time. The combination of a reasonable operating process and equipments with perfectly shielding canminimize exposure risk to operating personnel, and effectively prevent operating equipments and the surrounding environment from radioactive contamination. Some suggestions for improvement are also provided for follow-up projects, considering existed problems in filter cartridge replacement and transport process.

A Statistical Analysis of Atmospheric Aerosol Radioactivity in Guangdong Province

Li Qiaoqin, Zhang Yanjin, Deng Fei, Jiang Lan, Feng Yingsi, Lin Qing

RADIATION PROTECTION BULLETIN. 2017, 37(1):  8-13. 

Abstract ( 18 )  

References | Related Articles | Metrics

According to the monitoring results ofambient air aerosol in the surrounding area of nuclear power plants, uranium mining areas, control areas without large-scale release of radioactive materials,statistical analyses were carried out for gross α, gross β and ⁷Be in aerosol samples from around Daya Bay NPP, Yangjiang NPP, Taishan NPP (not running), uranium mining areas, Guangzhou City, Maoming City and Shaoguan City. The changes of aerosol radioactivity levels before and after the operation of nuclear facilities, and those for Fukushima nuclear accident, were compared.

An Overview of Near-Earth Space Radiation and its Protection

Cheng Pengchao, Min Rui

RADIATION PROTECTION BULLETIN. 2017, 37(1):  14-21. 

Abstract ( 29 )  

References | Related Articles | Metrics

The radiation conditions in space andwithin space stations were overviewed. On account of all kinds of space radiation, there are lots of measures for protection, including choosing suitable shielding material,adopting launch timing and orbit, using of various radiation protection methods and biochemical protective agents.

Preparation Practices for Clearance of Slightly Contaminated Materials in Ningde NPP

Chen Jianbo, Chen Jian

RADIATION PROTECTION BULLETIN. 2017, 37(1):  22-26. 

Abstract ( 19 )  

References | Related Articles | Metrics

Aiming at the minimization of radioactive waste, the strategy and management procedures were developed for clearance of slightly contaminated materials in Ningde NPP, in accordance with the relevantstandards. Classification management and measurements were conducted for wasteresin of APG, ventilation filter framework and personal protective equipment, asa practical preparation for implementation of clearance.

Design Improvements for Radiation Control Area Access of AP1000NPPs

Ren Huiting, Lin Faxiong

RADIATION PROTECTION BULLETIN. 2017, 37(1):  27-31. 

Abstract ( 28 )  

References | Related Articles | Metrics

The paper introduces the composition,functionalities and main equipments of radiation control area access (RCA) of AP1000 NPPs, analyzes the existing problems of the RCA layout. Combined with the operation management experiences on NPP RCA in China, the improved layout of RCAwas put forward for AP1000 NPPs.

Cosmic Ray Response Factor Measurement for High Pressure Ionization Chambers

Song Haiqing, Zhang Weizhu, Liao Jianhua, Lin Weiwei, He Yi, Lin Guang, Yangjiang

RADIATION PROTECTION BULLETIN. 2017, 37(1):  32-35. 

Abstract ( 23 )  

References | Related Articles | Metrics

By taking part in a comparison measurement held at Hedi reservoir in Lianjiang City, Guangdong Province, the values ofcosmic ray response factor were further verified for six RSS-131 high pressureionization chambers in use in Guangdong Environmental Radiation Monitoring Center (GERC). The results show that the value range is 0.609－0.713, with an average of 0.651 and a standard deviation of 0.036. It indicates that the cosmic ray response factor is stable, and, with theoretical calculations combined, can be easily obtained for different regions, so as to solve the difficulties in cosmic ray measurement.

Radiation Protection for Control Rod Characterization in Late-life ofa Research Reactor

Ma Zhongsheng, Zeng Junhui, Dan Guiping, Chen Zhilin, Su Rongbo, He Yanrong, Wang Jianjun

RADIATION PROTECTION BULLETIN. 2017, 37(1):  36-39. 

Abstract ( 19 )  

References | Related Articles | Metrics

The source term, and radiation hazardsin the sampling process, of control rod in late-life of a research reactor were analyzed, and the radiation monitoring and protection scheme during the operation was worked out. In the whole sampling process, the maximum individual accumulated dose was 61 μSv, the collective dose was 229 μSv·person. These resultsindicate that the radiation protection measures for sampling effectively ensuredthe safety of worker.