Radiation dose distribution of liquid fueled thorium molten salt reactor
PUBLICATION: NUCLEAR SCIENCE AND TECHNIQUES
AUTHORS: Li, CY; Xia, XB; Cai, J; Zhang, ZH; Zhang, GQ; Wang, JH; Qian, ZC
A liquid fueled thorium molten salt reactor (TMSR-LF), one of the Generation IV reactors, was designed by the Shanghai Institute of Applied Physics, Chinese Academy of Sciences. This study uses the`rt code to calculate the neutron and gamma dose rate distributions around the reactor. Multiple types of tallies and variance reduction techniques were employed to reduce calculation time and obtain convergent calculation results. Based on the calculation and analysis results, the TMSR-LF1 radiation shield with a 60-cm serpentine concrete layer and a 120-cm ordinary concrete layer is able to meet radiation requirements. The gamma dose rate outside the reactor biological shield was 16.1 mSv h(-1); this is higher than the neutron dose rate of 3.71 x 10(-2) mSv h(-1). The maximum thermal neutron flux density outside the reactor biological shield was 1.89 x 10(3) cm(-2) s(-1), which was below the 1 x 10(5) cm(-2) s(-1) limit.