摘要
2011年4月,对某射线仪器厂准备退役的放射源室实施了源项调查。调查结果表明:除1号标定室靠近60 Co源的部分墙面和天花板近表面处的γ辐射空气吸收剂量率及表面污染监测值较高外,其他地方的室内物品及构筑物近表面的γ辐射空气吸收剂量率在省本底值范围之内;倒源井水并未被放射性污染;搜寻到5枚放射源,总放射性活度为2.54×1011 Bq,其中3枚为新发现,其总放射性活度为2.99×109 Bq,从而避免了潜在的辐射事故风险。
In April 2011,an investigation of source term was performed for the radioactive source compartment of a ray instrument plant,being set to be decommissioned.The results showed that gamma radiation air absorbed dose rate and surface contamination monitoring values were relatively high in the wall and ceiling near the cobalt source of calibration chamber 1 and the values were at the normal background level in the other area of the compartment.The water in the well was not contaminated by radiation materials.5 radioactive sources in the source compartment were detected with the total activity of 2.54 × 1011 Bq.Among which 3 radioactive sources were reported for the first time with a activity level of 2.99× 109 Bq and then the potential radiation accident can be avoided because of the survey.
出处
《铀矿冶》
CAS
2014年第1期46-50,共5页
Uranium Mining and Metallurgy
关键词
放射源
放射性污染
源项调查
radioactive source
radioactive pollution
source survey
