Table of Content

20 April 2025 Volume 45 Issue 2

  

Research progress on optimization of airborne effluent discharges from nuclearpower plants based on multi-objective decision-making

WU Feifei, KANG Jing, CHEN Hailong, LIAN Bing

RADIATION PROTECTION BULLETIN. 2025, 45(2):  1-5. 

Abstract ( 40 )   PDF (756KB) ( 68 )  

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Effluent discharge optimization is an important basic work of radioactive waste management. The study on effluent discharge optimization can provide a decision-making basis for the safe and orderly development of nuclear energy, with the aim to obtain best economic, environmental and social benefits. Based on the three principles of radiation protection and the theoretical basis of multi-objective optimization decision-making, this study systematically analyzes the multiple influencing factors such as dose, economic and social effect of effluent discharge optimization, compares and analyzes the advantages and disadvantages of traditional optimization methods and intelligent optimization algorithms, such as cost-effectiveness, cost-benefit, multi-attribute utility analysis, and second-generation non-dominant sequencing genetic algorithm, and puts forward future research prospects and enlightenment, with aim to to provide scientific reference for improving the level of optimal management and decision-making of effluent discharges.

Simulation study on the cleaning effect of ultrasonic transducer array for auxiliary system pipeline in nuclear power plant

LI Xuefei, BAI Yunkang, LI Jianyu, ZHAN Jie, HUANG Xinming, CHEN Zhiyuan, YANG Junwu, SHAN Chenyu, ZHANG Chen

RADIATION PROTECTION BULLETIN. 2025, 45(2):  6-14. 

Abstract ( 33 )   PDF (10876KB) ( 15 )  

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This paper proposes a "V-shaped" ultrasonic transducer array for cleaning the inner walls of pipelines in the auxiliary systems of nuclear power plants, aiming to avoid the incomplete cleaning on the opposite side of the pipelines caused by the standing wave effect associated with the traditional "linear" arrangement of multiple transducers in ultrasonic cleaning. Multi-physics coupling simulations were performed by using Comsol to investigate the cleaning effect of the "V-shaped" array in the pipe. The simulation results show that when the ultrasonic excitation voltage is set to 400 V, and the three transducers in the "V-shaped" array are excited with phases of 0°, 45°, and 90°, respectively, the water field in the pipe is more evenly distributed. The maximum sound pressure reaches 157 kPa, exceeding the cavitation threshold, which induces cavitation. Additionally, the force exerted by the transducer array on the pipe′s inner wall deposits varies periodically. Based on these results, the voltage of 400 V and the excitation phases of 0°, 45°, and 90° are proposed as reference parameters for the cleaning process, providing an effective reference for the decontamination process of pipelines in nuclear power plant.

Key items and optimization measures for establishing the radiation control area of Hualong One unit

WANG Wei

RADIATION PROTECTION BULLETIN. 2025, 45(2):  15-21. 

Abstract ( 27 )   PDF (4637KB) ( 56 )  

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The establishment of a radiation control area is one of the necessary conditions for nuclear power plants to load nuclear fuel, and it is also the most important task for the radiation protection department of a power plant during the handover phase. This paper introduces the characteristics and difficulties of Hualong One reactor type in the process of establishing a control area. At the same time, combined with relevant experience of CPR and EPR models in the process of establishing a control area, this paper focuses on analyzing the key items of the establishment of seven controlled areas, such as "control area boundaries", "information signs", "monitoring systems", and "material preparation", and makes a comprehensive summary of the work related to the establishment of control area. The paper discusses the relevant matters that affect the normal operation of the control area in the later stage, such as the adjustment of the functional position and renovation of the BAX room, and provides solutions for reference. In addition, the paper also explains some typical situations that may be overlooked during the establishment of the control area and lead to unplanned accidental exposure risks, such as the original design defects of the grille door of the outer ring corridor of the fuel transfer channel, which leads to incomplete isolation during fuel transfer.

Problems and improvement of the localization of radiation protection monitoring instrument in nuclear power plants

FU Can

RADIATION PROTECTION BULLETIN. 2025, 45(2):  22-25. 

Abstract ( 24 )   PDF (719KB) ( 48 )  

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Due to the high requirements of radiation safety control and technical difficulties in radiation protection monitoring of nuclear power plants, some radiation monitoring instruments have been imported for a long time. This paper reviews domestic radiation protection monitoring equipment and analyzes the possible risks from the perspective of technology and function. Facing the problems identified, some management and control measures for classification and graded approach have been formulated. Through the tracking and supervision of the whole process, the performance of the domestic instrument basically meets the use requirements of nuclear power plant.

Decommissioning of ⁶⁰Co radioactive source in a large γ irradiation facility

SONG Hui, FANG Kai, MO Mo, ZHANG Yong, DENG Chao, LI Wenge

RADIATION PROTECTION BULLETIN. 2025, 45(2):  26-32. 

Abstract ( 25 )   PDF (4286KB) ( 47 )  

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The decommissioning of cobalt sources in large γ-irradiation facility is accompanied with some risk, and the radiation safety of operators and the environment during decommissioning should be considered. The experience of the cobalt source decommissioning operation completed by Hunan Irradiation Center in the first half of 2024 is summarized in this paper. The decommissioning operation plan design, operation practice, risk analysis, emergency management and other aspects are described. Good decommissioning practices ensure the health of radiation workers and environmental safety; the good practice can be used as reference for the decommissioning of radioactive source of irradiation equipment.

Practice and suggestions on decontamination training for nuclear emergency worker

CHEN Bing, HE Panhong, LIU Xujiao

RADIATION PROTECTION BULLETIN. 2025, 45(2):  33-38. 

Abstract ( 22 )   PDF (1852KB) ( 88 )  

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Decontamination is a crucial method for rescuing personnel and preventing the spread of contamination during nuclear emergency response. Decontamination can effectively and rapidly eliminate radioactive material from human body and equipment, significantly reduce the possibility of external and internal exposure. This discussion focuses on current decontamination standards, working principles, equipment and agents, operation procedures, classified personnel decontamination, area control measures, as well as practical suggestions for personnel protection, training, standardized material configuration, intelligent equipment research and development, and the establishment of a socialized decontamination force system.

Exploration and practice of bone marrow form of acute radiation sickness from external exposure

WANG Xinmiao, HE Guangcui, YI Hai

RADIATION PROTECTION BULLETIN. 2025, 45(2):  39-41. 

Abstract ( 39 )   PDF (706KB) ( 68 )  

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Bone marrow is an ionizing radiation (IR) sensitive organ and short-term exposure to a certain dose of IR could cause damage to hematopoietic system, resulting in rapid decrease in white blood cells and platelets. In severe cases, IR may lead death due to serious bleeding and infection. Hematopoietic stem cell transplantation (HSCT) is important specialist treatment technology in bone marrow form of acute radiation sickness (ARS) from external IR. However, there are currently very few actual rescue cases available for reference. In order to improve the treatment ability of ARS patients, some research and exploration on the application of HSCT in the therapy of ARS were carried out, so as to further accumulate experience and technology related to the management of ARS.

The radiation protection system and the United Nations Sustainable Development Goals (SDGs)

LI Juan, SUN Quanfu, ZHANG Yong

RADIATION PROTECTION BULLETIN. 2025, 45(2):  42-44. 

Abstract ( 28 )   PDF (703KB) ( 230 )  

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The Sustainable Development Goals (SDGs) are a series of goals formulated by the United Nations to address major global challenges, aiming to guide member states and the international community to achieve sustainable development in the economic, social, and environmental fields. On September 25, 2015, leaders from 193 member states unanimously adopted "Transforming Our World: The 2030 Agenda for Sustainable Development", officially establishing 17 Sustainable Development Goals (SDGs), which cover the three dimensions of economy, society, and environment. As an important part of ensuring human health and environmental safety, the radiation protection system is closely related to several of the SDGs.