Core temperature measurement equipment for 1e-level reactors used in nuclear power plants

Abstract

The invention discloses 1E-grade reactor pile core temperature measurement equipment for a nuclear power plant. The 1E-grade reactor pile core temperature measurement equipment comprises an armored thermocouple, an armored thermocouple compensation cable and a connector for connecting the thermocouple and the compensation cable, wherein the connector comprises a plug and a socket; the plug and the socket are connectors with a contact pin and a jack; the contact pin of the plug is inserted into the jack of the socket and the contact pin of the socket is inserted into the jack of the plug, so that electric connection is realized; the peripheries of the jacks are covered with insulating materials; shells of the plug and the socket are fixedly connected through threads, and an interface is sealed by adopting a sealing ring; two clamping sleeves, which are in overlapping joint, are arranged at inner hole parts in the tail ends of the plug and the socket; and a pressing part is in thread connection with the tail ends of the plug and the socket, is tightly pressed through the clamping sleeves and penetrates through a threading running cable at the tail end. The measurement equipment can reach nuclear safety-grade requirements and has the advantages of good insulating property, strong anti-interference capability and radiation resistance.

Description

technical field [0001] The invention relates to a nuclear power plant 1E level reactor core temperature measuring device. Background technique [0002] According to the design requirements of pressurized water reactor nuclear power plants, the core temperature measurement equipment of 1E reactors should be of nuclear safety level. According to the requirements of nuclear safety level instrumentation equipment, the measurement equipment should reliably provide core Coolant outlet temperature. In the case of a dehydration accident, the environment inside the containment is extremely harsh, and the containment is filled with water vapor and boron-containing water at a temperature of about 150-180°C and a pressure of 0.5 MPa, with a humidity as high as 100% and strong radioactivity; In the event of an earthquake accident, due to the strong vibration of the reactor equipment and components, the connection between the components in the measurement equipment may be loosened or dis...

AI Technical Summary

Problems solved by technology

In the case of a dehydration accident, the environment inside the containment is extremely harsh, and the containment is filled with water vapor and boron-containing water at a temperature of about 150-180°C and a pressure of 0.5 MPa, with a humidity as high as 100% and strong radioactivity; In the event of an earthquake accident, due to the strong vibration of the reactor equipment and components, the connection between the components in the measurement equipment may be loosened or disconnected, resulting in measurement failure

However, the connectors of existing industrial armored thermocouples are not shock-resistant, not resistant to radiation, and not sealed at high temperatures, so they cannot work normally in the harsh environment in the containment; the insulation resistance of conventional K-type armored thermocouples It does not meet the nuclear level requirements, so it cannot work normally in the environment of pressure vessels and containment vessels

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