Test apparatus and method for safety valve

Abstract

An apparatus and method for testing the performance of a safety valve perform tests under the same operation conditions as a pressurizer safety valve installed on a reactor coolant system of a nuclear power plant. The apparatus for testing the performance of a safety valve, i.e., a set pressure test, a seat tightness test, a flow rate test, a blow-down test, a water discharge test of a loop seal, a discharge load test, etc. on the safety valve, includes an accumulator 21 including at least one electric heater 22 for heating a predetermined amount of water filled therein, and storing steam produced by the electric heater 22 under high pressure, a test vessel 41 storing the steam supplied from the accumulator 21 under high pressure, and providing test pressure to a subject safety valve 48, the steam being supplied after flow rate and pressure thereof are controlled, a condensing tank 81 storing demineralized water to be supplied to the accumulator 21, and condensing and collecting the steam discharged from the subject safety valve 48, and a water-supply pump 111 supplying the water stored in the condensing tank 81 to the accumulator 21.

Description

technical field [0001] The present invention generally relates to an apparatus and method for testing the performance of a pressurizer safety valve installed on a reactor coolant system of a nuclear power plant, and more particularly relates to a method for testing the safety valve Apparatus and methods capable of performing set pressure tests, seat tightness tests, flow tests, blow-down tests, loop seals on regulator safety valves Drainage test, discharge load test (discharge load test), etc. Background technique [0002] Generally, a safety valve is a pressure relief device that is automatically operated by positive pressure on the inlet side and is characterized by momentary opening. Such safety valves usually have a built-in spring and are opened or closed by force acting on the spring. Such safety valves are used to maintain a constant pressure or prevent overpressure in equipment handling fluids. [0003] In particular, a pressurizer safety valve for a reactor coola...

AI Technical Summary

Problems solved by technology

In this way, the construction of safety valve testing facilities requires relatively high cost and relatively wide space

Also, excessive noise (for example, 130 decibels or more) is generated when the discharge port of the target safety valve is exposed to air

Therefore, it is difficult to install testing facilities near residential areas

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