[3I09-13] Reactor Design, Nuclear Power Plant Construction and Seismic Resistance 2

3:30 PM - 3:45 PM JST(6:30 AM - 6:45 AM UTC)

[3I12] Study on structural feasibility of BWRX-300 Reactor Building under Japanese severe seismic conditions

*Yutaka Hirota¹, Yusuke Shimizu¹, Yoshitaka Nagayama¹, Hiroyuki Kamio², Ryosuke Miyoshi², Mamoru Itou² (1. Hitachi-GE Nuclear Energy, Ltd., 2. KAJIMA CORPORATION)

Keywords:

BWRX-300,seismic design,SMR,3D-FEM,soil interaction,seismic response,nonlinear

The BWRX-300, a small module reactor, is a new type of reactor with a significantly simplified system compared to conventional BWRs in order to overcome the disadvantages of scale and pursue high economic. The R/B is characterized by a cylindrical building buried deep underground, which allows for increased resistance to APC and soil pressure while still having a small area due to simplified systems. In this study, a seismic feasibility study was conducted on the R/B of BWRX-300 under Japan's high seismic condition, whose detailed design is progressing for the North America. The input was set up as a seismic condition of design basis accident, which is a max acceleration of 1300 Gal, so that a seismic condition of domestic site can be roughly enveloped at the maximum acceleration. An evaluation was conducted using a 3D FEM model including the building and surrounding ground, and an ultimate state evaluation was performed for seismic condition of design basis accident and a prospect for the feasibility of the structural design against earthquake loads was obtained.