Table of Content

20 April 2014 Volume 34 Issue 2

  

Issues

A Novel Access Mode—EVEREST

Li Xuefeng, Ren Xueming

RADIATION PROTECTION BULLETIN. 2014, 34(2):  1-6. 

Abstract ( 27 )   PDF (753KB) ( 54 )  

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A novel access mode, EVEREST mode, toNPPS controlled zone is described. This mode shows a unique advantage and meanwhile poses more stringent requirements for the management of NPPs. This emergingmode is to be first employed at Taishan NPP in our country.

Progresses

Applicability Analysis and Suggestions on the CORMIX Applications in Environmental Assessment of NPPs

Liu Yongye, Yang Yang, Qiao Yahua, Liu Fudong, Chen Xiaoqiu

RADIATION PROTECTION BULLETIN. 2014, 34(2):  7-11. 

Abstract ( 26 )   PDF (556KB) ( 20 )  

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The main function modules,main development principles and foreign application profiles of the Cornell mixing zone expert system (CORMIX) were briefly described in this paper, as well as the applicability analysis of CORMIX. In addition, suggestions on the software applicationsin the environmental assessment of liquid effluents from the domestic NPPs wereput forward.

Articles

Calculation of Containment Radionuclide Concentration in Core Damage Assessment

Li Wenjing, Long Liang

RADIATION PROTECTION BULLETIN. 2014, 34(2):  12-15. 

Abstract ( 31 )   PDF (384KB) ( 20 )  

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Calculation of containment radionuclide concentration is an important part of estimating containment radiation dose rate, and the latter is a primary parameter for core damage assessment. This paperprovides the calculation of concentration of three typical nuclides within containment post-accident in both simplified analytical method and indirect methodwith ORIGEN2 code. The results show that the indirect method can simulate the release and decay of radionuclides and the transformation among them, and suggests it can be used in the early core damage assessment. But if the containment radionuclide concentration is evaluated after a long time since the accident, whenthe nuclides with short half-lives have little effects on the result, the simplified method is appropriate.

Gamma Spectrometry of Vaporization-Concentrated ¹³¹I from Pear River Water

Deng Fei, Chen Wentao, Li Lingjuan, Song Haiqing, Lin Qing, Mo Guanghua, Chen Zhidong, Hu Deqing, Li Jinlin

RADIATION PROTECTION BULLETIN. 2014, 34(2):  16-19. 

Abstract ( 20 )   PDF (455KB) ( 7 )  

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¹³¹I was measured by gamma spectrometer for water in Pear River in Guangzhou. 15 L water was vaporized in condition of pH=7 and 0.5 mg/L iodine. The recovery rate of ¹³¹I is 95%and the lower detection limit is 0.004 Bq/L. The concentration of ¹³¹Iis 0.03-0.20 Bq/L during 2011-2013.

Relative Calibration of Point Source for In-Situ Equipment Measuring Radioactivity in Water

Liu Mingjian, Luo Ming, Yan Xuekun, Gu Tienan

RADIATION PROTECTION BULLETIN. 2014, 34(2):  20-23. 

Abstract ( 21 )   PDF (437KB) ( 11 )  

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To address the problems in efficiencycalibration of in-situ radioactivity measuring equipment, an approach to efficiency calibration was presented using point source in lieu of liquid volume source. Through Monte Carlo calculation, photoelectric count efficiency of lanthanumbromide detector to point and volume sources are obtained respectively and the relationship of calibration efficiency were established between point and volumesources for simplified use of efficiency calibration in practice.

Reviews

Mechanisms and Role of Genomic Instability in Radiation-induced Carcinogenesis

Yuan Yayi, Zuo Yahui

RADIATION PROTECTION BULLETIN. 2014, 34(2):  24-27. 

Abstract ( 23 )   PDF (342KB) ( 32 )  

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Ionizing radiation induces genomic stability, which is transmitted over many generations after irradiation. Since induced genomic instability accumulates gene mutations, it has been thought to playa role in radiation-induced carcinogenesis. Understanding the mechanism of genomic instability will provide unique opportunities to identify new diagnosis andtherapeutic targets. This review focuses on recent discoveries on the mechanismsgoverning the formation of genomic instability.

Advance of Metabonomics and its Application in Radiation Protection

Chen Zhongmin, Nan Xinzhong, Liu Bo, Liu Liang

RADIATION PROTECTION BULLETIN. 2014, 34(2):  28-31. 

Abstract ( 25 )   PDF (342KB) ( 123 )  

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Metabolomics is an important biological technology. This technology is increasingly and widely applied in the field ofradiation protection,with many focusing on identifying the radiation dose-related biomarkers in metabolites. This paper introduces the concept, metabonomics,research methods and features, as well as the progress in biomarker research ofanimal and human in the radiation protection area.

Experiences

Gene Expression of Human Lymphocyte Cells Following Heavyion Irradiations

Liu Jiangong, Liu Hongyan, Dang Xuhong, Zhang Zhongxin, Zhang Huifang, Duan Zhikai, Zuo Yahui

RADIATION PROTECTION BULLETIN. 2014, 34(2):  32-34. 

Abstract ( 23 )   PDF (261KB) ( 17 )  

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To study the effect of heavyion on expression of MDM2 and GADD45A in human lymphocyte cell. Gene expression was expression of MDM2 and GADD45A exposure to heavyion at different time was measured byreal-time quantitative PCR. Expression of MDM2 and GADD45A was at different times, furthermore, showed up regulation in human lymphocyte cell irradiated by heavy ion at 12 hours later. MDM2 and GADD45A can be induced by heavyions at 12 hours later and may play an important role in apoptosis.

Calculation of ³H Leak from Liquid Tank at a NPPs

Wang Zhiyu, Du Xiaoli, Xu Xiangjun, Deng Anchang, Chen Hailong, Wang Huijuan, Zhang Aiming

RADIATION PROTECTION BULLETIN. 2014, 34(2):  35-38. 

Abstract ( 26 )   PDF (783KB) ( 25 )  

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This paper describes the visual modflow that was used to build a three dimensional groundwater flow field for simulating the waste tank with ³H leakage at a NPP site in case of an accident. The results show that the migration of ³H in geological condition is slowerand it need 8 years for its peak of concentration to get into river. The migration of ³H is dominant in horizontal direction and minor in vertical direction.

Reports

Investigation of Chronic Diseases Morbidity of Retired Radiation Workers in a Certain Factory

Wu Xiaoyan, Shi Xiangxing, Zhan Jinming, Liu Zhanqi, Jiang Ruyi

RADIATION PROTECTION BULLETIN. 2014, 34(2):  39-41. 

Abstract ( 20 )   PDF (316KB) ( 27 )  

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An investigation was conducted on themortality of the workers in a factory to research the health effections of the occupational factor on the retired radiation workers. A cross-section study wasadopted to study the population consisting of all retired radiation workers on the register from the year of 2000. The morbidity of the chronic diseases were calculated. The chronic diseases mainly show circulatory system and tumor, the morbidity of the circulatory system and tumor were 1 146.8/10⁵ and 114.4/10⁵, respectively. The results shows the occupational factor has no influence on the retired radiation workers.