Fundamental studies on the performance of O-ring for cask

Conclusions obtained from this study are: sealing performance of rubber O-ring should be evaluated by the peak initial contact pressure (Pci*) and compression set test provides reliable estimation of the durability of rubber O-ring. Value of Pc(min) has not been obtained because of lack of experimental data. Practically, Pc(min) is considered to be approximately 5 kgf/cm2 from the result of liquid leakage detection. Consecutive studies on Pc(min) should be developed with regard to the surface conditions at contact zone and elastic property of rubber. Practical guide for the design of groove has been proposed. A method for minute liquid leakage detection has been developed. 2 references, 9 figures