Pilot type safety valve jumping monitoring device and method of PWR (Pressured Water Reactor) nuclear power station

Abstract

The invention discloses a pilot type safety valve jumping monitoring device and method of a PWR nuclear power station. The monitoring device comprises a first temperature transmitter, a pressure transmitter and a second temperature transmitter, wherein the first temperature transmitter is arranged at the inlet end of a main valve of the pilot type safety valve; the pressure transmitter is arranged between an upstream isolating valve and a downstream isolating valve of the pilot type safety valve, and used to monitor the pressure parameter at the inlet end of the main valve of the pilot type safety valve; and the second temperature transmitter is arranged between the pressure leading tube end of the main valve of the pilot type safety valve and a control cabinet of the pilot type safety valve, and used to monitor the temperature parameter of fluid at the position of the control cabinet of the pilot type safety valve. The method is used for monitor jumping of the pilot type safety valve. The monitoring device and method of the invention can be used to monitor pressure and temperature change of the pilot type safety valve in real time.

Description

technical field [0001] The invention relates to the field of commissioning and operation of a pressurized water reactor nuclear power plant, and more specifically, the invention relates to a device and method for monitoring take-off of a pilot safety valve of a pressurized water reactor nuclear power plant. Background technique [0002] Compared with ordinary spring-type safety valves, pilot-operated safety valves are more stable and reliable in high-pressure, large-diameter systems, and can effectively avoid the problem that spring-type safety valves do not return to their seats when they take off. In important occasions such as the primary circuit of the pressurized water reactor nuclear power plant, the pilot safety valve is widely used, and the take-off setting value of the pilot safety valve needs to be verified during unit commissioning and start-up. [0003] The role of the pilot safety valve in the system design is mainly to ensure that the relevant process systems a...

AI Technical Summary

Problems solved by technology

[0006] In this known technology, it can only be confirmed through the temperature change of the first temperature transmitter 9 after the pilot-operated safety valve takes off, but the pressure at the pilot-operated safety valve cannot be monitored in real time

At the same time, during the frequent take-off process of the pilot-operated safety valve, the temperature change is not as sensitive as the pressure change, and the temperature curve does not reflect the frequent take-off problem of the valve.

After the pilot-operated safety valve takes off frequently, the specific number of take-offs cannot be accurately obtained, so it is impossible to analyze the damage degree of the pilot-operated safety valve

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