Analysis of individual monitoring results of occupational external exposure in a steel group
10.13491/j.issn.1004-714X.2025.03.012
- VernacularTitle:某钢铁集团职业外照射个人剂量监测结果分析
- Author:
Bing QU
1
;
Mengxue LI
2
;
Lei ZHANG
1
;
Jun DENG
2
;
Weidong MA
2
Author Information
1. Anshan Iron & Steel Occupational Safety and Health Services, Anshan 114031, China.
2. National Institute for Radiological Protection, Chinese Center for Disease Control and Prevention, Beijing 100088, China.
- Publication Type:OriginalArticles
- Keywords:
Steel group;
Radiation worker;
Occupational external exposure;
Individual monitoring
- From:
Chinese Journal of Radiological Health
2025;34(3):378-383
- CountryChina
- Language:Chinese
-
Abstract:
Objective To understand the individual radiation dose levels and changes of occupational external exposure among radiation workers in a steel group from 2020 to 2023, and to provide a basis for strengthening radiation protection in the group. Methods According to the Specifications for individual monitoring of occupational external exposure (GBZ 128-2019), individual monitoring was conducted using a thermoluminescent dosimeter, with each monitoring cycle lasting 90 days, totaling four cycles per year. Individual monitoring data of occupational external exposure among radiation workers in the steel group from 2020 to 2023 were collected for statistical analysis. Results A total of 5889 monitoring records were collected from radiation workers across 37 affiliated units of the steel group during the period of 2020-2023. The average annual effective dose was 0.150 mSv, the maximum annual effective dose was 3.84 mSv, and 0.3% monitored workers showed annual effective doses exceeding 1 mSv. The average annual effective dose in 2023 was 0.146 mSv, which was lower than in 2020 but higher than in 2021 and 2022 (Z = −6.657 to 14.129, P < 0.001). The number of monitored workers in industrial and medical sectors accounted for 86.9% and 13.1%, respectively. Their average annual effective doses were 0.152 mSv and 0.140 mSv, respectively, and the difference was statistically significant (Z = −7.969, P < 0.001). In the industrial sector, the average annual effective dose for the monitored workers in industrial radiography was significantly higher than other occupations (Z = −8.094, P < 0.001). There was a significant difference in average annual effective dose among workers of different occupational categories in the medical sector (H = 67.040, P < 0.001). The average annual effective doses were relatively high for diagnostic radiology and nuclear medicine. Additionally, the average annual effective doses for male and female radiation workers were 0.150 mSv and 0.152 mSv, respectively (P > 0.05). Conclusion The average annual effective dose of radiation workers in the steel group was at low levels for four consecutive years, which meet the requirements of the national standard. However, to maintain the individual radiation dose levels of radiation workers as low as reasonably achievable, it remains necessary to strengthen radiation protection management in the steel group.
