NUCLEAR REACTOR FACILITY AND ELECTRIC INTERCONNECTION PENETRATION MECHANISM

PROBLEM TO BE SOLVED: To suppress leakage of radioactive materials by setting a temperature of an electric interconnection penetration part to a design temperature or lower against a containment atmosphere or a local heat source of which the temperature is higher than the design temperature.SOLUTION: An electric interconnection penetration mechanism 10 for preventing overheating of an electric interconnection penetration part 11 of a nuclear reactor containment 2 includes: a containment penetration sleeve 3; a water stop part 13 which constitutes a closed space 18 together with the containment penetration sleeve 3 and the electric interconnection penetration part 11; a water filling pipe 15 which is connected to the containment penetration sleeve 3 and supplies cooling water for cooling to the closed space 18; and a discharge pipe 16 which is connected to the containment penetration sleeve 3 and discharges cooling water which has cooled the electric interconnection penetration part 11, from the closed space 18. In addition, the electric interconnection penetration mechanism 10 may further include a cooling water supply mechanism which supplies cooling water to the closed space 18 when an accident occurs.