Study on the Containment Performance of MOX Fuel Processing Glovebox in Earthquake -Loading and Leakage Tests for Window Panels-
Akihiro Matsuda*1, Yuichi Uchiyama*2, Masakatsu Inagaki*2,
Susumu Tsuchino*3, Hiroyuki Umetsu*4, and Koji Shirai*5
*1Graduate School of Systems and Information Engineering, University of Tsukuba, 1-1-1 Tennodai, Tsukuba, Ibaraki 305-8573, Japan
*2Seismic Safety Division, Japan Nuclear Energy Safety Organization, Tokyo, Japan
*3Nuclear Energy System Safety Division, Japan Nuclear Energy Safety Organization, Tokyo, Japan
*4Fuji Electric Systems Co., Ltd, Power Plant Business Headquarters, Kanagawa, Japan
*5Civil Engineering Research Laboratory, Central Research Institute of Electric Power Industry, Chiba, Japan
This paper shows the results of the leakage tests and the large deformation analysis of a full-scale glovebox window to establish the capacity of the containment of the MOX fuel manufacturing glovebox during an earthquake. In leakage tests, the stainless steel container installed on the reverse of the glovebox window was pressurized with a halogen-air mixture after deformation was applied to the upper part of window frame using 6 micro handy jacks, and to the four glove-ports using electrical actuators. A numerical model for the rubber seal was obtained with biaxial loading tests of chloroprene sheet specimens. Tensile loading tests of acrylic resin specimens were conducted to measure the material modulus. The FEM code ABAQUS was applied to the numerical simulation and the user-subroutine function for the hyperelastic model was used to predict the deformation of the rubber seal. These tests demonstrated that a glovebox window constructed with a rubber seal and a resin panel shows no leakage larger than 0.1 vol%/h with large static deformation. The results of the numerical simulation showed that the rubber seal resolved the effects of deformation of a window panel on the containment barrier, and that two lips of the rubber seal play a key role on the containment of the glovebox.
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