Material examination of the pipings in the small leak sodium-water reaction test rig (SWAT-2); Studies of small leak sodium-water reactions (6)

Kanegae, Naomichi*; not registered; not registered; not registered; not registered; not registered; Shimoyashiki, Shigehiro*

The Small Leak Sodium-Water Reaction Test Rig (SWAT-2) has been operated since April 1972, and a total of one hundred and seven (107) experiments of steam injection into sodium were carried out through July 1975. The total accumulative operating time of 2600 hours, the condition of sodium at near 500C, high impurity level (by steam injection), thermal shock considerations due to sodium charge and drain, etc. made it necessary to study the likeliness of the facility life reduction. It is therefore the purpose of this study to evaluate the lifespan of the SWAT-2 facility by material examination of the pipings. The result of the material examination was expected to help the basic understanding of the wastage mechanism due to sodium-water reaction. The result, however, revealed that no detectable amount of caustic corrosion or decrease in material strength were evident.