Malfunction prevention valve and nuclear equipment comprising same

A nuclear equipment, comprising:

• a reactor;
• a containment vessel in which the reactor is disposed;
• a main valve disposed inside the containment vessel so as to be connected to an interior of the reactor, the main valve being configured to be opened and closed so that the interior of the reactor and an interior of the containment vessel are selectively in communication with each other, to be closed when a working fluid is supplied and to be opened when the working fluid is discharged;
• a reset valve configured to open to allow the working fluid to be supplied to the main valve;
• a trip valve configured to open to allow the working fluid to be discharged from the main valve;
• a malfunction prevention valve configured such that, when the reset valve is opened, the working fluid is allowed to flow to the main valve, and when the trip valve is opened, the working fluid is allowed to be discharged from the main valve, and the main valve is not opened when the trip valve is opened while the reactor is in normal operation;
• and
• a working fluid passage portion configured to provide a passage such that the working fluid flows between two or more of the main valve, the reset valve, the trip valve, or the malfunction prevention valve,
• wherein the malfunction prevention valve is configured to be opened and closed according to a difference in pressure between the reactor and the interior of the containment vessel.