FIELD: nuclear power engineering. SUBSTANCE: device designed for use as passive element of hydraulic and pneumatic systems to prevent heavy loss of coolant in case of emergency depressurization of pipelines by shutting off depressurized section of circulating circuit in emergency situations has shut-off valve and check valve mounted, respectively, in inlet and outlet pipelines of loop being shut off. Pulse line connects outlet pipeline of loop being shut off (on section up to check valve along coolant flow) to damping chamber of shut-off valve. EFFECT: improved reliability. 2 dwg
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