Nuclear reactor containment vessel and nuclear power plant using same

Abstract

A nuclear reactor containment vessel (8) comprises a nuclear reactor's primary containment vessel (3) which contains a nuclear reactor pressure vessel (2), a nuclear reactor's secondary containment vessel (4) which is disposed outside the nuclear reactor's primary containment vessel (3) and which has the pressure resistant properties and the air-tightness which are equivalent to those of the nuclear reactor's primary containment vessel (3), an airbag (5) which is disposed within the nuclear reactor's secondary containment vessel (4) and which, when a failure occurs in the nuclear reactor's primary containment vessel (3), expands while receiving and encapsulating a high-pressure gas discharged from the inside of the nuclear reactor's primary containment vessel (3), and a gas phase vent pipe (6) which connects the nuclear reactor's primary containment vessel (3) and the airbag (5).

Description

technical field [0001] The present invention relates to a reactor containment vessel of a boiling water type light water reactor and a nuclear facility using the same. Background technique [0002] Generally speaking, a boiling water light water reactor (BWR) adopts a pressure-suppressed reactor primary containment vessel, which has the advantage of being able to reduce the volume of the reactor primary containment vessel. In the boiling water type light water reactor, the atmosphere in the primary containment vessel of the reactor is replaced with nitrogen, and the oxygen concentration is lowered than normal air to operate. Therefore, even if the core fuel becomes high temperature during an accident and reacts with the coolant to generate hydrogen, there is no need to worry about detonation or deflagration occurring in the primary containment vessel of the reactor. In addition, in the boiling water type light water reactor, since the primary containment vessel of the react...

AI Technical Summary

Problems solved by technology

In this case, during the normal operation of the facility, the operator cannot stand in the space including the operation platform and carry out work such as transferring fuel

Or, in the case of an air atmosphere, a large amount of hydrogen in a serious accident is passed through a fuel such as an igniter or a recombiner or recombined, but this is accompanied by a large amount of heat release, so the temperature of the reactor containment vessel becomes 200 Above ℃, it may be damaged by heating

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