关于北哈萨克斯坦斯捷尔诺戈尔斯克地区室外环境 γ 剂量率的研究及其对公众外照射的评估。

STUDIES ON GAMMA DOSE RATES IN OUTDOOR ENVIRONMENT AND ASSESSMENT OF EXTERNAL EXPOSURE TO PUBLIC IN STEPNOGORSK AREA, NORTHERN KAZAKHSTAN.

机构信息

International Department of Nuclear Physics, New Materials and Technology, L.N. Gumilyov Eurasian National University, Nur-Sultan 010008, Kazakhstan.

Institute of Radiobiology and Radiation Protection, nCJSC Astana Medical University, Nur-Sultan 010000, Kazakhstan.

出版信息

Radiat Prot Dosimetry. 2022 Oct 25;198(18):1387-1398. doi: 10.1093/rpd/ncac180.

DOI:10.1093/rpd/ncac180

PMID:36062465

Abstract

The present study is based on a pilot study, which showed that the Stepnogorsk area of Northern Kazakhstan represents sources of potential contamination of the living environment. The aim of the study was measurement of outdoor gamma radiation levels, activity concentration in soil samples and assessment of external exposure to the public. According to our analysis, the highest ${\boldsymbol{H}}^{\ast}$(10) values ∼2870 nGy h-1 were detected in the Aqsu school territory, which were slightly higher than the control readings for this region. The average 226Ra, 232Th and 40K activities were 617.8 ± 3.2 Bq kg-1, 188.3 ± 2.9 Bq kg-1 and 731.5 ± 6.2 Bq kg-1, respectively. The annual effective dose received by the Aqsu population ranged from 0.08 to 3.5 mSv y-1, which was found higher by an order of magnitude than the upper annual dose limit. Changes in radiation background are an unfavourable factor for the population and may possibly become potential radiation risks for long-term effects.

摘要

本研究基于一项初步研究，该研究表明哈萨克斯坦北部的斯捷普诺戈尔斯克地区是潜在环境污染源。本研究的目的是测量室外伽马辐射水平、土壤样本中的活度浓度并评估公众的外照射。根据我们的分析，在阿克苏学校区域检测到最高的 ${\boldsymbol{H}}^{\ast}$(10) 值 ∼2870 nGy h-1，略高于该地区的对照读数。226Ra、232Th 和 40K 的平均活度分别为 617.8 ± 3.2 Bq kg-1、188.3 ± 2.9 Bq kg-1 和 731.5 ± 6.2 Bq kg-1。阿克苏居民的年有效剂量在 0.08 到 3.5 mSv y-1 之间，这比上限剂量高一个数量级。辐射背景的变化对人群来说是一个不利因素，并且可能会成为长期影响的潜在辐射风险。