Nuclear reactors cooling agent pump mechanical sealing leakage amount abnormity quick processing method

Abstract

The invention is a rapid processing method for mechanically sealing leakage exception of refrigerant pump in the nuclear reactor, which comprises the prior detecting method. When the leakage exception of a shaft gland component is detected, the method adjusts the filled water temperature of the shaft gland component within the temperature allowing range of the filling water in the shaft gland component, thus recovering the leakage of the shaft gland component to a normal range. The method can process the exceptional leakage of sealing leakage of the refrigerant pump in the nuclear reactor timely and rapidly, adjust the leakage of the sealing component, and control the leakage in the original normal standard, thus guaranteeing the normal operation of the reactor.

Description

technical field [0001] The invention relates to a safety maintenance method of a nuclear power plant, in particular to a method for dealing with abnormal leakage of a mechanical seal of a reactor coolant pump in a nuclear power plant. Background technique [0002] The reactor coolant pump (hereinafter referred to as the nuclear main pump) is an important equipment of the nuclear power plant, and is called the heart of the reactor cooling system. The flow resistance ensures that the reactor coolant circulates continuously in the primary circuit. On the one hand, the core is cooled, and on the other hand, the heat generated by the reactor is transmitted to the steam generator through the coolant. [0003] The shaft seal assembly is the most vulnerable component on the nuclear main pump. According to the investigation of the working conditions of the main pump, more than 70% of the failures come from the shaft seal, and the continuous increase or decrease of the leakage of th...

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Problems solved by technology

[0004] However, in the current usage, the normal level of No. 1 seal leakage can only be guaranteed through regular inspection and maintenance, because during the normal operation of the nuclear power plant, the reactor cannot be shut down, and the seal components must be worn and damaged during operation. Only in the regular maintenance process can the worn seal assembly be replaced to achieve its normal operation effect. In case of abnormal wear or the leakage of No. 1 seal exceeds the specified alarm value range, only the machine must be shut down. Stack, replace the sealing components, otherwise unpredictable consequences will occur

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