Table of Content

20 April 2015 Volume 35 Issue 2

  

Radwaste Treatment Technologies at Sanmen Nuclear Power Plant

Jin Hairui

RADIATION PROTECTION BULLETIN. 2015, 35(2):  1-6. 

Abstract ( 54 )   PDF (698KB) ( 128 )  

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Radwaste treatment processes at Sanmennuclear power plant are presented, which include a passive airborne waste process, a liquid waste process with online and offline systems combined, and also aprocess for solid waste. The latter is designed as a set of centralized treatment systems that separately collect waste in the fore-end and share a super compactor and grouting/cementation device in the back-end.

An Introduction to Emergency Evacuation Time Estimates of American NPPs

Li Wenting, Hou Jie, Lin Quanyi, Gao Jianwei, Wang Ruiying, Yang Ling

RADIATION PROTECTION BULLETIN. 2015, 35(2):  7-12. 

Abstract ( 37 )   PDF (579KB) ( 117 )  

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The regulation and relevant technicalbasis on emergency evacuation time estimates of American NPPs is studied, and the development and methodology of NPP surrounding population evacuation time analysis is illustrated. By comparing different calculation methods, the factors that influence the emergency evacuation time can be identified. With an American NPP taken as an example, the calculation code and processes are introduced. Some suggestions are put forward for NPP surrounding population evacuation time estimate in China.

A Study on Gene Expression of CDKN1A from Human Peripheral Blood Induced by ⁶⁰Co γ-rays

Liu Jiangong, Dang Xuhong, Zhang zhongxin, Yang biao, Duan Zhikai

RADIATION PROTECTION BULLETIN. 2015, 35(2):  13-15. 

Abstract ( 26 )   PDF (263KB) ( 58 )  

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To explore the effect of ionizing radiation on CDKN1A gene expression in human peripheral blood, blood samples were exposed to ⁶⁰Co γ-rays at different doses. The resulted CDKN1A mRNA expression change was observed by real time PCR. For a dose of 0～2 Gy, the relationship between the CDKN1A-dose represents certain line correlation. A linear regression equation(Y=0.8465+1.1015D,R=0.93,p<0.01) and curvilinear regression equation (Y=0.6273+3.0883D-0.7485D²,R=0.96,p<0.05) has been obtained using regression analysis methods. γ-ray can induced CDKN1A gene expression changed and increase dose-dependently, but the stabilityof regression equation should be tested further.

Development of In-service Chemical Decontamination Technologies forPWR NPPs

Liu Bin, Li Xinmin, Song Lijun, Zheng Wenyuan

RADIATION PROTECTION BULLETIN. 2015, 35(2):  16-20. 

Abstract ( 16 )   PDF (415KB) ( 39 )  

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With respect to contaminations commonly found in the primary loop and auxiliary systems of PWR NPPs, typical in-service chemical decontamination technologies in the world are briefly reviewed, including HP/CORD-UV, AP-CITROX, CAN-DEREM, LOMI, and E MMAC. The formulation, process, material compatibility, waste treatment, and potential risk related are carefully evaluated. Suggestions are provided for the development and applicationof these technologies.

Application of Defoaming Agent in Seawater Circulating Cooling Systemof Coastal NPPs

Wang Xixu, Zhu Xuefeng, Zuo Shengli, Mei Miao

RADIATION PROTECTION BULLETIN. 2015, 35(2):  21-24. 

Abstract ( 26 )   PDF (380KB) ( 37 )  

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The cause of foaming in seawater circulating cooling system at coastal NPPs is analysized and main defoaming methods commonly used are reviewed, with chemical defoaming agents and their properties highlighted. Suggestion on selection of defoaming agents is then provided.

Development and Operation Management of Radioactive Waste Repository in Yunnan Province

Zhang Hui, Luo Jing, Li Yunyan

RADIATION PROTECTION BULLETIN. 2015, 35(2):  25-28. 

Abstract ( 22 )   PDF (435KB) ( 85 )  

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The design, construction, operation management, security and safety, as well as radiation protection of radioactive waste repository in Yunnan Province is introduced.

Project Management of Nuclear and Radiation Environmental Monitoring Capacity Building in China

Chen Qunhua, Qian Rui

RADIATION PROTECTION BULLETIN. 2015, 35(2):  29-31. 

Abstract ( 23 )   PDF (355KB) ( 158 )  

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In order to meet the continuous development demand of nuclear and radiation environmental protection in the new situation, and to further enhance the capability of nuclear and radiation environmental monitoring and supervision, the Ministry of Environmental Protection (former State Environmental Protection Administration) organized and implemented more than 10 major capability building projects on nuclear and radiation monitoring during the "Tenth-Five", "Eleventh-Five" and "Twelfth-Five" periods. Project management is strictly implemented in the whole process. This paper summarized the experiences involved. The strategies for application of advanced project management methods are also discussed preliminarily, combined with the international development direction and China's actual situation.

An Environment Radioactivity Survey in and around a Uranium Enrichment Area in Guangdong Province

Sun Gongming, Li Guanchao, Bai Shuming, Yang Bo, Lin Jian

RADIATION PROTECTION BULLETIN. 2015, 35(2):  32-36. 

Abstract ( 33 )   PDF (469KB) ( 18 )  

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A survey of environment radioactivityin and around a uranium enrichment area of approximately 700 km² in GuangdongProvince has been made. The result shows that the gamma radiation dose rate is far higher than the provincial natural radioactivity level. ²³⁸U, ²³²Th, ²²⁶Ra in some soil samples are more concentrated than thebackground in Guangdong. There is a river with too higher content of radionuclide, of which U is 15.7 times than the reported value for Beijiang River in the province. The U concentration in effluents from some uranium ore occurrences anda hydrometallurgy factory exceeds the nuclear industrial limit.

Program Design of Code CRAMTRA for Radioactive Material Transport Consequence Assessment

Wang Renze, Li Guoqiang, Zhang Jiangang, Wang Xuexin, Zhuang Dajie, Sun Hongchao, Sun Shutang, Meng Dongyuan

RADIATION PROTECTION BULLETIN. 2015, 35(2):  37-40. 

Abstract ( 25 )   PDF (719KB) ( 67 )  

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Some codes have been introduced from western countries since 1980s, as an important tool for radioactive material transport consequence assessment. There isn't, however, a homemade code with independent intellectual property rights in China. Program design of code CRAMTRA in this respect is presented, with its physical model, flow chart and UML diagram included. This lays a solid basis for its code development.

Environmental Radiation Level Survey of a Remediated Uranium Mining Area in Xinjiang

Zhao Qiwen, Wang Guoquan

RADIATION PROTECTION BULLETIN. 2015, 35(2):  41-43. 

Abstract ( 21 )   PDF (409KB) ( 26 )  

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The environmental radiation level of auranium mining area, once remediated, was surveyed. It is showed that ²²⁶Ra content in soil samples from some locations exceeds the limit requirement, and measures are needed to be taken to have the area further remediated.

Absorbed Dose Rate Survey of Uranium Exploration Sites in Yili, Xinjiang

Zhao Qiwen, Lei Xuejie

RADIATION PROTECTION BULLETIN. 2015, 35(2):  44-46. 

Abstract ( 17 )   PDF (429KB) ( 6 )  

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The gamma radiation level at uranium exploration sites in Yili, Xinjiang was surveyed. It is showed that the surficialgamma absorbed dose rate remains normal local background level.