中子发生器辐射环境影响估算

Radiation Environmental Impact Assessment of Neutron Generators

摘要: 目的：本文运用理论计算方法，估算测井作业过程中子发生器对周围人员和环境产生影响。方法：利用文献推荐的估算模式，计算停机后1 h中子发生器外表面0.3 m处的辐射剂量率水平。结果：估算的职业人员所受年附加有效剂量当量率为0.046 mSv/a，公众人员受到的附加有效剂量当量率为0.005 mSv/a。结论：估算结果均低于《电离辐射防护与辐射源安全基本标准》(GB18871-2002)中的规定的职业人员剂量约束值5 mSv/a，公众人员管理限值0.1 mSv/a，中子发生器测井过程中不会对环境和公众产生危害。

Abstract: Objective: In this paper, the theoretical calculation method is used to estimate the influence of the neutron generator on the people and the environment. Methods: The radiation dose rate at 0.3 m on the external surface of the neutron generator was calculated at 1 h after shutdown using the estimation model recommended in the literature. Results: The estimated annual additional effective dose equivalent rate was 0.046 mSv/a for professionals and 0.005 mSv/a for the general public. Conclusion: The estimated results are all lower than the occupational personnel dose constraint value of 5 mSv/a and the public personnel management limit value of 0.1 mSv/a specified in the basic standard for ionizing radiation protection and radiation source safety (GB18871-2002). The neutron generator logging process will not cause harm to the environment and the public.