[3L10-14] Safety Analysis

[3L10] Reduced Order Model of Severe Accident Analysis Code for SBO aiming Probabilistic Safety Margin Analysis

Development of an efficient data sampling method for ROM construction

*Masaki Matsushita¹, Tomohiro Endo¹, Akio Yamamoto¹ (1. Nagoya University)

Keywords:Reduced order model, Singular value decomposition, Severe accident analysis, RELAP5/SCDAPSIM, SBO

For probabilistic safety margin analysis, we developed a reduced order model (ROM) that reconstruct calculation results of typical severe accident progressions obtained by the severe accident analysis code, RELAP5/SCDAPSIM. In order to construct ROM with minimum calculation costs, an algorithm of efficient data sampling is developed. The ROM is applied to the station black out (SBO) with loss of feed water capabilities. This study shows an efficient method of ROM construction which considers the uncertainties of the RCIC down / recovery time and decay heat.