FAST GAMMA RAY LEAKAGE SPECTRA SIMULATION

摘要

We present the simulation of the decay gamma source leakage spectra. In order to solve this problem we are developing the SGRD code (Spectroscopy, Gamma-ray, Rapid, and Deterministic). The main goal of this software is to perform fast and accurate ID spherical calculation. For this purpose, the collided and uncollided parts of the flux spectrum are calculated separately using the discrete ordinates S_N method. The uncollided part is calculated by transporting each source line and the collided component is computed using the multigroup method. Comparison of gamma leakage spectra with a reference MCNP5 calculation on a typical test problem shows that accurate results are obtained and the computational time is several orders of magnitude shorter with SGRD.