Feasibility Study on Base Mat Uplift of Nuclear Power Plants Using Large-Scale Blast Excitations (Part 2: Preliminary Uplift Test of Block Specimen)

摘要

It is important to estimate the base mat uplift for the design of nuclear power plants against severe earthquakes in Japan. JNES (Japan Nuclear Energy Safety Organization) performs a test project focused on the base mat uplift behavior using blast-induced ground motions at a mining site. The investigation of the blast-induced ground motion is reported in part 1[1]in SMiRT-19.In part 1, we selected Black Thunder Mine (BTM) in the U.S.A. as a test site and measured the blast-induced ground motion. As a result it was conformed that the blast-induced ground motions at BTM are enough acceleration level for the base mat uplift test and the observed motions have similar characteristics to the earthquakes.Before the main tests, a preliminary test was executed at the test site in order to confirm that the method to measure the base mat uplift was working fine.