Spent fuel pool emergency water supplement diesel engine pump set and system for nuclear power plant

Abstract

The invention discloses a spent fuel pool emergency water supplement diesel engine pump set and system for a nuclear power plant. The pump set comprises a motor, a single-stage pump body and a water tank. According to the a spent fuel pool emergency water supplement diesel engine pump set and system for the nuclear power plant, the motor and the single-stage pump body are connected through a diaphragm coupling so that the transmission precision and stability between the motor and the single-stage pump body can be guaranteed; a flow meter is arranged, so that the working applicability of the diesel engine pump set is improved; a mechanical seal is arranged, the mechanical seal is a single-end-face balance type cartridge mechanical seal, and then the service life of the mechanical seal can be prolonged; different types of bearings are selected for a non-driving-end bearing and a driving-end bearing according to different stressed forces, and the operation reliability of the diesel enginepump set is improved while the operation stability of the single-stage pump body is improved; and a water tank is arranged, and when a water inlet system breaks down, the diesel engine pump set can still be started to implement normal operation.

Description

technical field [0001] The invention belongs to the technical field of diesel engine pump sets, and in particular relates to a diesel engine pump set and system for emergency replenishment of water in a spent pond used in a nuclear power plant. Background technique [0002] Spent fuel is spent nuclear fuel that has been exposed to radiation, usually from nuclear reactors in nuclear power plants. Spent fuel contains large amounts of radioactive elements and is therefore radioactive, which, if not properly disposed of, can seriously affect the environment and the health of those who come into contact with them. [0003] Spent fuel has a high specific activity and releases a large amount of decay heat. It must be stored for a period of time until the radioactivity and residual heat drop to a certain level before operating and processing. According to the storage method, there are wet storage and dry storage for spent fuel storage; among them, in the wet storage, the diesel en...

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Problems solved by technology

According to the storage method, there are wet storage and dry storage for spent fuel storage; among them, in the wet storage, the diesel engine pump set for emergency water replenishment in the spent pool is indispensable, and the diesel engine pump set for emergency water replenishment in the spent pool is used for operation within 2.5 hours after the accident. However, the use environment of the diesel engine pump set for emergency water replenishment in the spent pool will reduce its mission, and the connection between the components of the diesel engine pump set and the selection of component materials will also affect the efficiency of the diesel engine pump set for emergency water replenishment in the spent pool. performance has a big impact

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