Radiological consequences assessment of a hypothetical accident during transportation of spent nuclear fuel

Bo Cao, Weijie Cui
2019 Nuclear Technology and Radiation Protection  
Sci en tific pa per https://doi.org/10.2298/NTRP180917003C Dur ing the trans por ta tion of spent nu clear fu els, the po ten tial re lease of the ra dio ac tive ma teri als into the at mo sphere in the case of an ac ci dent be comes a se ri ous threat to pub lic health and the en vi ron ment. In China, a com mer cial re pro cess ing plant is planned to be com missioned around 2025 based on the China nu clear roadmap. Af ter be ing cooled on site the spent nu clear fu els are trans ported to
more » ... trans ported to the re pro cess ing plant by train or truck. This re quires the assess ment of ra dio log i cal con se quences of such ac ci dents dur ing trans por ta tion, there fore dose cal cu la tions un der hy po thet i cal ac ci dent con di tions have been pre sented in this pa per. The to tal ef fec tive dose equiv a lent and ground de po si tion are cal cu lated us ing the HotSpot health phys ics com puter code with site-spe cific me te o ro log i cal con di tions. The re sults in dicate that the to tal ef fec tive dose equiv a lent and ground de po si tion are both de creased with the in crease of the down wind dis tance. The max i mum of the to tal ef fec tive dose equiv a lent is about 1.4×10 1 Sv, which is larger than the reg u la tion limit for the pub lic. The TEDE coun ter plot shows that the in ner re gions marked with dose con tours of 1.0×10 -3 Sv are higher than the reg u la tion lim its for the pub lic, how ever this needs no in ter ven tion but any un nec es sary trip to this area should be avoided. Key words: ra dio log i cal con se quences as sess ment, at mo spheric dis per sion mod el ling, spent nu clear fuel, to tal ef fec tive dose equivalent, HotSpot B. Cao, et al.: Ra dio log i cal Con se quences As sess ment of a Hy po thet i cal ... 94
doi:10.2298/ntrp180917003c fatcat:6rzw2lpg6vb7tcldra55peldna