THE STEEL PLATE CONCRETE STRUCTURE OF NUCLEAR REACTOR CONTAINMENT FACILITIES, NUCLEAR REACTOR CONTAINMENT VESSEL USING THE SAME, AND NUCLEAR REACTOR CONTAINMENT FACILITY INTERNAL STRUCTURE

摘要

It suppresses the back pressure which out-of-plane deforms the steel plate resulting from the moisture contained in concrete, and enables observation of concrete during a common period. The steam discharge pipe 6 and the pipe opening part 5 are provided in the steel plate concrete structure which consists of the inner steel plate 1 exposed to a high temperature environment, the outer steel plate 2, the stud 3, and the concrete 4. As shown in FIG. The steam discharge pipe 6 has a small opening 7. The contained water inside the concrete evaporates in a state where the concrete temperature reaches around 100 ° C., becomes steam, gathers near the back surface of the steel sheet 1, and moves from the small opening 7 to the outside of the containment vessel through the steam discharge pipe 6. Is released.