Current status of R and D program of spent fuel storage technology in CRIEPI

1. Introduction In 1997, a new study program of demonstrative tests for interim storage of spent fuel had been started, which is mainly related to concrete cask storage technology. Concrete cask storage system is considered to essentially have an economical advantage. This paper introduces the current status of CRIEPI's R and D program of spent fuel storage technology on concrete cask, particularly aiming at the realization of dry storage away from reactor in 2010. 2. Demonstration program for qualification of concrete cask performance (FY1998- 2003) To propose 'safety standards for concrete cask structures, systems, components', the following demonstration program for qualification of concrete cask performance has been in progress. Schedule of this program is shown in Table.1. a. Basic design of Japanese type concrete cask Basic design of two types of concrete cask, reinforced-concrete type (RC type) and concrete filled steel type (CFS type) to store the high burn-up spent fuel have been terminated. b. Fabrication of full-scale concrete cask Two types of full-scale concrete cask and multi-purpose canister are being fabricated to apply to the demonstration tests. c. Demonstration tests Heat removal test of concrete cask considering the normal, ab-normal and accidental events, impact test of the metal canister are planned. Seismic test with scale-model cask has been also executed. d. Safety Analysis To contribute to 'safety standards for concrete modular structures, systems, components', safety analysis will be performed using the acknowledgements obtained in demonstrative tests. This work has been executed under contract with Ministry of Economy and Trade Industry