RADIATION PROTECTION BULLETIN

Research progress of cell senescence in the occurrence and development of radiation injury

NIU Xiaofeng, YANG Siyu, DENG Lijuan, REN Zheng, BI Chengliu, YANG Jun

RADIATION PROTECTION BULLETIN. 2024, 44(6): 1-9.

Abstract ( 10 )

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Radiation injury is a common complication of radiotherapy for cancer patients. Radiation injury has a relative high incidence and is difficult to prevent and to be treated, which may seriously affects the life quality of patients. Cell senescence is a state in which the cell cycle is stagnated, and radiation therapy usually makes cells enter a state of senescence, which facilitates the removal of tumor cells in the body while may also causing damage to normal cells. With the progress of research, the role of ionizing radiation-induced cell senescence in radiation injury has received more and more attention, and the research progress of cell senescence in radiation injury is reviewed in this paper.

Overview of in-situ marine radiation monitoring technology

GUO Qing

RADIATION PROTECTION BULLETIN. 2024, 44(6): 10-14.

Abstract ( 5 )

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The current status of international in-situ marine radiation monitoring technology is investigated. Three kinds of in-situ radiation monitoring technology, namely buoy, ship-borne and ship-towed, are briefly summarized. The advantages and disadvantages of the three monitoring technologies and their application scenes are analyzed.

Analysis of thyroid function, thyroid nodule prevalence, and their occupational correlation among radiological workers in selected first class hospitals in Tianjin

MU Bowen, HUANG Lei, WANG Andong, ZHAO Shiyi, WANG Dayu

RADIATION PROTECTION BULLETIN. 2024, 44(6): 15-21.

Abstract ( 6 )

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To investigate the thyroid function and thyroid nodule status among radiological workers in medical applications, and preliminary explore their correlation with radiological factors, with the aim to provide evidence for radiological protection management. Occupational health examination results of radiological workers from a first class hospital were collected. The participants were grouped based on gender, job positions (classified according to the Occupational Exposure Classification Codes), and years of radiological work experience. The thyroid function test results and thyroid nodule detection rates from thyroid ultrasonography were statistically analyzed. Non-radiological workers served as the control group for comparative analysis. There was no statistically significant difference in thyroid nodule positivity between the observation group and the control group. However, within the observation group, differences in thyroid nodule positivity were observed between males and females. Compared with the control group, TSH levels were different in interventional radiologists (2E) and nuclear medicine personnel (2C), with P<0.05 and P<0.01, respectively. FT₄ levels in interventional radiologists (2E) were lower than those in the control group, with P<0.05. The thyroid nodule positivity rate differed between the group with 21-40 years of radiological work experience and the control group, with P<0.05. TSH levels differed between the control group and those with 1-10 years and 21-30 years of radiological work experience, with P<0.05 and P<0.01, respectively. Thyroid nodules among radiological workers may not be occupationally related. Differences in TSH levels were observed between the control group and nuclear medicine (2C) and interventional radiology (2E) personnel in the observation group, which may be associated with gender and years of radiological work experience. Whether the elevation of TSH in nuclear medicine personnel is related to exposure to radionuclide iodine requires further investigation.

Challenges and countermeasures for emergency response of nuclear power plant accidents under pandemic scenarios

NI Zhiyong, GUO Mingzhi

RADIATION PROTECTION BULLETIN. 2024, 44(6): 22-27.

Abstract ( 4 )

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:Nuclear emergency is the last line of defense for nuclear safety, and it is necessary to anticipate the combination of pandemic and nuclear accidents response methods in advance when the risk of pandemic is increasing. This article starts with the characteristics of pandemic prevention and nuclear accident emergency response, taking into consideration of the actual emergency response and disposal work, analyzes the challenges faced by nuclear emergency under pandemic scenarios. Exploratory solutions or suggested response measures have been proposed to address potential difficulties identified from five aspects: emergency plan integration, emergency command and coordination, emergency assistance and resettlement, public psychological counseling, and safe operation of non accident reactor units. These measures could provide a reference for improving nuclear emergency plan for responding whole hazard risks in the future.

Control experience on collective dose during outage of CPR1000 unit

ZHOU Yuqing, NIU Xiaoqing

RADIATION PROTECTION BULLETIN. 2024, 44(6): 28-33.

Abstract ( 4 )

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This article analyzes the two main factors affecting collective dose during outage of nuclear power units- namely the reactor unit radiation levels and the total maintenance working hours -and their control methods. This article summarizes the experience gained from controlling collective dose during ten outages of two CPR1000 units at a particular nuclear power plant. Which includes enhancing radiation protection organizations, allocating collective dose targets, conducting hot spot flushing, developing innovative maintenance tools and techniques, improving maintenance processes, and managing high level radiation areas. These experiences have been validated through practical implementation and proven to be effective.

Analysis on abnormal dose values of individual dose monitoring for radiation workers in some medical institutions in Jieyang City from 2020 to 2022

CHEN Xi

RADIATION PROTECTION BULLETIN. 2024, 44(6): 34-40.

Abstract ( 7 )

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To analyze abnormal dose values of individual dose monitoring for radiation workers in some medical institutions in Jieyang City from 2020 to 2022, and to provide recommendations from three aspects, namely radiation workers, medical institutions as well as health administration and supervision, in order to reduce the abnormal monitoring data of individual dose and to reduce the risk of exposure to ionizing radiation for radiation workers. Individual dose monitoring results exceeding 1.25 mSv in a single monitoring cycle were collected from selected medical facilities in Jieyang from 2020 to 2022. Radiological workers with abnormal monitoring data were investigated and analyzed. A total of 100 abnormal dose values were identified from 2020 to 2021, with an abnormal rate of 1.27%, among which workers of diagnostic radiology accounted for 89%. 76% of abnormal dose values is mainly between 1.25 and 5 mSv. The first three causes of abnormal dose were that personal dosimeter had been retained in the radiation workplace (36.00%), that personal dosimeter had been worn while supporting patients receiving radiation examination (20.00%), and that the personal workload during wearing dosimeter increased significantly (13.00%). It is necessary to strengthen the protection consciousness of radiation workers and their awareness of the importance of personal dose monitoring, to improve the management system of radiation health and to strengthen the publicity and education, and to strengthen the health supervision and law enforcement, in order to reduce the incidence of individual dose abnormalies.

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