The Study of Methodology for SGTR Dose Estimation based on New Idea

In this study, without the renormalization, RCS inventory, RCS concentration and secondary side concentration itself are directly used for the SGTR dose calculation. The iodine spike is very complicated in calculation process. In this study, easier calculation method is introduced using RADTRAD 3.03. The basic idea is based on the concept of NUREG 0409. Specially, the source term and scenario are used the standard problemgiven in NUREG 0409. In order to calculate the SGTR dose, easer method is carried out by RCS inventory specific nuclides activity methodology. From this study, some findings are as below: a. RCS inventory specific activity is directly applied to RADTRAD input. b. Release fraction time file can control Iodine spiking effect source term in the new idea. c. The ratio between RCS inventory and nuclide inventory is directly used in the release fraction time input in the new idea. d. Source term control and spiking effect control is much easier in the new idea method than in the general method from Table2 and Table3. e. The comparisons between the currently method and the new method are in good agreement. From "b" to "d" of these results, we can find that the new-idea SGTR dose analysis methodology is very simple and much easier than the general method.