| Yang Yong.Evaluation and design of volume of intermittent decay pool for nuclear medical radioactive waste water[J].Chinese Journal of Radiological Medicine and Protection,2022,42(3):219-224 |
| Evaluation and design of volume of intermittent decay pool for nuclear medical radioactive waste water |
| Received:December 02, 2021 |
| DOI：10.3760/cma.j.cn112271-20211202-00470 |
| KeyWords:Nuclear medicine Radioactivity waste water Intermittent decay pool |
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| Abstract:: |
| Objective To provide the calculation method for evaluating and designing the volume of nuclear medicine intermittent decay pool, so as to provide technical reference for medical institutions, environmental impact assessment institutions and management departments, etc. Methods By constructing a mathematical model and deriving the calculation formula, the relationship between the volume of intermittent decay pool and the radioactivity level of wastewater was established. Results There were differences in the number of diagnosis and treatment of patients, the amount of nuclide used and the amount of waste water produced in the nuclear medicine department at different medical institutions, so the evaluation and design of the intermittent decay pool were also different as a result. But the result should meet the relevant requirements of the standards GB 18871-2002 and HJ 1188-2021: the total activity discharged every month ≤ 10 ALImin, and the activity discharged once ≤ 1 ALImin; gross alpha activity ≤ 1 Bq/L, gross β activity ≤ 10 Bq/L, 131I activity concentration ≤ 10 Bq/L; the temporary storage time after filled with radioactive wastewater ≥ 10 times longest half-life, and the temporary storage time of 131I in patient waste water ≥ 180 d. The calculation method provided in this paper can be used to evaluate and design the volume of intermittent decay pool in nuclear medicine departments. |
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