Spatial interpolation of gamma dose in radioactive waste storage facility

International Nuclear Science, Technology and Engineering Conference 2017

原子能学

Harun, Nazran^1 ; Sujan, Muhammad Fathi^1 ; Ibrahim, Mohd Zaidi^1

Waste Technology Development Centre (WasTeC), Waste and Environmental Technology Division, Malaysian Nuclear Agency, Bangi Kajang

43000, Malaysia^1

关键词: External radiation;    License Requirements;    Protection requirements;    Radiation dose measurements;    Radiation workers;    Shielding design;    Spatial interpolation;    Storage facilities;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/298/1/012047/pdf
DOI  :  10.1088/1757-899X/298/1/012047

来源: IOP

【 摘 要 】

External radiation measurement for a radioactive waste storage facility in Malaysian Nuclear Agency is a part of Class G License requirement under Atomic Licensing Energy Board (AELB). The objectives of this paper are to obtain the distribution of radiation dose, create dose database and generate dose map in the storage facility. The radiation dose measurement is important to fulfil the radiation protection requirement to ensure the safety of the workers. There are 118 sampling points that had been recorded in the storage facility. The highest and lowest reading for external radiation recorded is 651 microSv/hr and 0.648 microSv/hour respectively. The calculated annual dose shows the highest and lowest reading is 1302 mSv/year and 1.3 mSv/year while the highest and lowest effective dose reading is 260.4 mSv/year and 0.26 mSv/year. The result shows that the ALARA concept along time, distance and shield principles shall be adopted to ensure the dose for the workers is kept below the dose limit regulated by AELB which is 20 mSv/year for radiation workers. This study is important for the improvement of planning and the development of shielding design for the facility.