Table of Content

20 February 2025 Volume 45 Issue 1

  

Progress and commentary

Preliminary feasibility analysis of phytoremediation of radium contaminated soil

YUAN Han, QIAO Xinyan, CAO Shaofei, SHANG Zhaorong

RADIATION PROTECTION BULLETIN. 2025, 45(1):  1-9. 

Abstract ( 17 )   PDF (5507KB) ( 12 )  

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Plant remediation technology has become an effective means of controlling heavy metal and radioactive nuclide contamination due to its low cost and environmental friendliness. ²²⁶Ra produced during uranium mining and smelting is an alpha nuclide with a long half-life. Once released into the environment, ²²⁶Ra may pose a potential threat to human health through food chain. Therefore, studying the absorption and transport mechanisms of ²²⁶Ra in the soil plant system and its influencing factors is crucial for carrying out plant remediation work on ²²⁶Ra contaminated soil. By conducting research on the biogeochemical cycle of radium, the absorption and transport mechanisms of radium from soil to plants, and their influencing factors both domestically and internationally, this study analyzed the plant remediation strategies and feasibility of radium contaminated soil, and proposed suggestions to improve the efficiency of plant remediation of radium contaminated soil.

Research progress on germplasm resources screening of uranium concentrated plants

ZHANG Chao, QIAO Xinyan, CAO Shaofei

RADIATION PROTECTION BULLETIN. 2025, 45(1):  10-18. 

Abstract ( 20 )   PDF (781KB) ( 53 )  

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Uranium contaminated soil treatment is a hot issue in uranium mine environmental management. Phytoremediation technology is a new method dedicated to the remediation of heavy metal pollution in soil. The study of uranium concentration in plants is the focus of phytoremediation of uranium contaminated soil, and it is particularly important to screen plants with strong concentration ability. By investigating the concentration plants under different soil pH values and soil organic matter content conditions, germplasm resources of high-quality uranium-concentrated plants can be obtained. At the same time, it can be combined with soil amendment, plant-microbe remediation, and inter-cropping remediation methods to improve the plant′s ability to concentrate uranium. The research results show that Cyperaceae, Poace, Malvaceae, Brassicaceae, Asteraceae, and Commelinaceae perform well in uranium concentration and can be used as germplasm resources for uranium-concentrated plants.

Ariticles

Screening assessment research on public exposure due toC-14 airborne effluent discharge

YUE Qi, LIAN Bing, WANG Yan, YANG Jie, CHEN Jiachen, MENG Binchi, WU Feifei

RADIATION PROTECTION BULLETIN. 2025, 45(1):  19-27. 

Abstract ( 17 )   PDF (3310KB) ( 3 )  

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To implement a conservative and rapid assessment of public exposure due to airborne effluent discharge from nuclear facilities under the conditions of limited environmental parameters of facility site, this study develops a graded screening assessment model based on the screening assessment strategy proposed in the IAEA Safety Report Series No.113, which can implement a conservative to realistic assessment of public exposure due to airborne effluent discharge to atmosphere. A case study of airborne C-14 effluent release scenarios from Hualong One nuclear reactor was established and the assessment results of different public exposure assessment models were compared. The results of the study demonstrate the robustness of the developed screening assessment model. The model can be used for screening assessment of airborne effluent discharge from different types of nuclear facilities when assessment parameters are not available, and for independent review of assessment results by regulatory agencies.

Experiences

Analysis of abnormal gas source term in area radiation monitoring in a nuclear power plant

ZHANG Jingzhi, WU Zhifeng, WANG Liang

RADIATION PROTECTION BULLETIN. 2025, 45(1):  28-33. 

Abstract ( 14 )   PDF (5084KB) ( 11 )  

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The KRT0036MA is the channel for monitoring radioactive gas activity concentration, mainly used for radioactive monitoring in the ventilation pipeline of the main control area in nuclear power plant. During operation, the 4^th branch activity rised and was confirmed as real radiation level increase. This study analyzed the DVN system (NX ventilation system) layout, on-site operation and maintenance time line, working process and source term comparison, and identified the cause of the activity increase. By optimizing the sampling operation process and other measures, the radiation safety of the working environment for on-site personnel has been ensured.

Reports

Analysis of soil radioactivity level and estimation of external exposure levelin major cities of Inner Mongolia Autonomous Region

WANG Wei, LI Xin, ZHENG Xin, LI Yan, ZHU Yunlong, GAO Rong

RADIATION PROTECTION BULLETIN. 2025, 45(1):  34-39. 

Abstract ( 15 )   PDF (2818KB) ( 6 )  

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This paper analyzes the radioactivity levels in the surface soil of 12 major cities in Inner Mongolia Autonomous Region from 2016 to 2023 (from the 13th Five-year Plan to the middle of the 14th Five-year Plan). The results show that there is no significant change of ²³⁸U, ²³²Th, ²²⁶Ra, ⁴⁰K radioactivity level in 12 major cities compared with the range of the survey results of the natural radioactivity level in the soil of Inner Mongolia Autonomous Region from 1983 to 1990, and no abnormalities were observed in the artificial radionuclide ¹³⁷Cs. Evaluation of γ radiation levels in 12 major urban environments were made by using external exposure index and equivalent radium concentration. The evaluation results showed that the external exposure index and the equivalent radium concentration in 12 major cities were within the allowable value range. The external exposure level of soil in the 12 major cities in Inner Mongolia Autonomous Region is in compliance with national regulation.

Study on the significant difference of cumulative dose withseasons in a North China region

LIU Zehui, WANG Ruijun, SONG Qinnan

RADIATION PROTECTION BULLETIN. 2025, 45(1):  40-42. 

Abstract ( 13 )   PDF (969KB) ( 5 )  

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The cumulative dose data are often used in radiation environmental assessment. Whether there is a significant difference in cumulative dose in different seasons is significant for the evaluation of cumulative dose involved in subsequent radiation environmental assessment. This paper collected the cumulative dose data from April 2021 to May 2022 in a North China region, conducted seasonal classification and studied the significant differences of the cumulative dose in different seasons. Through one-way analysis of variance, it was concluded that there were significant differences in the cumulative dose in different seasons.