Shielding analyses for the reactor pressure vessel of SMART-P

In Korea, an advanced reactor system of 330 MWt power called SMART is being developed by KAERI to supply energy for seawater desalination as well as electricity generation. As the basic design of SMART has recently been completed, a national project to construct a scaled-down reactor of the SMART system called ‘SMART-P’ for demonstrating the safety and performance of the SMART system is underway. The SMART-P is a small-sized advanced integral PWR that produces a thermal energy of 65.5 MWt under full power operating conditions. A shielding design for the SMART-P reactor assembly is established by two-dimensional discrete ordinates radiation transport analyses. The DORT two-dimensional discrete ordinates transport code is used to evaluate the shielding designs for the reactor assembly of the SMART-P. The SMART-P reactor assembly is divided into three separate calculation models, each of which is modeled by R-Z geometry. The results indicate that the maximum neutron fluence at the bottom of the reactor vessel is 2.0x10¹⁸ n/cm² and that on the radial surface of the reactor vessel is 40x10¹⁷ n/cm². These results meet the requirements, l.OxlO²⁰ n/cm² and the integrity of the SMART-P reactor vessel during the lifetime of the reactor, is confirmed.