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| Development and application of a dynamic model for assessment of agriculture consequences of nuclear accident |
| Received:November 13, 2020 |
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| KeyWord:nuclear accident;dynamic assessment model;agricultural consequence;specific activity |
| Author Name | Affiliation | | CUI Hui-ling | China Institute of Radiation Protection, Taiyuan 030006, China | | HUANG Sha | China Institute of Radiation Protection, Taiyuan 030006, China | | Lü Ming-hua | China Institute of Radiation Protection, Taiyuan 030006, China | | ZHAO Duo-xin | China Institute of Radiation Protection, Taiyuan 030006, China | | ZHANG Jun-fang | China Institute of Radiation Protection, Taiyuan 030006, China | | LI Yun-peng | China Institute of Radiation Protection, Taiyuan 030006, China |
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| Abstract: |
| In order to evaluate the impact of nuclear accidents on agricultural ecological environment, a dynamic agricultural radiation assessment model(AgrRAM) was developed. Based on the dynamic model theory, AgrRAM simulates the dynamic transfer process of radionuclides in an agricultural environment from the deposition stage, which reflects real agricultural radiation effects after a nuclear accident. Taking Tianwan nuclear power plant as the epicenter, the simulation of hypothetical accidents in the range of 200 km×200 km was carried out by AgrRAM. The spatial distribution and time series of the specific activities of typical agricultural products were calculated to show the function of AgrRAM as dynamically simulating the agricultural consequences of nuclear accidents. The time of the accident was closely related to the growth characteristics of the agricultural products.The different accident time made the specific activity change by 1~2 orders of magnitude for 134Cs and 1~5 orders of magnitude for 131I. Under the same conditions, the activity of 131I in crops decayed faster than other nuclides, and if the interval between harvest time and accident time was long enough, the radiation damage of 131I was small. The sensitivity tests of the model parameters showed that the transfer factor had a great influence on the activity, especially for crops with only root uptake. The reliability analysis of AgrRAM showed that the deviation between AgrRAM and the conservative equilibrium model was approximately 5 times, which indicates the reliability of AgrRAM. |
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