Temperature distribution measuring method of shielded nuclear main pump cooling system

Abstract

The invention provides a temperature distribution measuring method of a shielded nuclear main pump cooling system. The method comprises the following steps: establishing an equivalent physical model of the shielded nuclear main pump cooling system, and setting the devices on an upper cooling loop and a lower cooling loop as nodes; obtaining the mass flow rate, equivalent heat effect power and specific heat of the cooling liquid at each node; determining the temperature changes of corresponding nodes; obtaining the flow before the confluence of two branches at each confluence point and the flow after confluence, and determining the temperature change relation at the confluence points according to energy conservation; and selecting one point in the loop as a temperature start point, and serially connecting the temperature changes according to a topological structure to obtain the temperature distribution of the equivalent physical model. By adopting the method provided by the invention, the overall temperature distribution of the shielded nuclear main pump cooling system can be obtained to facilitate system analysis.

Description

technical field [0001] The invention relates to the field of fluid machinery, in particular to a method for measuring temperature distribution of a shielded nuclear main pump cooling system. Background technique [0002] The canned pump is a kind of non-moving sealed pump. The pump and the driving motor are sealed in a pressure vessel filled with the pumped medium. The pressure vessel is statically sealed, and a rotating magnetic field is provided by a wire winding by driving the rotor. Since the structure of the canned pump cancels the rotary shaft sealing device of the traditional centrifugal pump, it can be completely leak-free. [0003] With its technical advantages of no leakage, canned pumps are widely used in many industries such as energy and chemical industry. In the third-generation nuclear power technology, in order to improve the safety of the reactor, a large shielded nuclear main pump is used as a core coolant circulation power source to replace the traditiona...

AI Technical Summary

Problems solved by technology

And at present, the temperature analysis of the large shielded nuclear main pump is limited to a single functional area, such as the bearing area, flywheel area, etc., and there is no systematic temperature detection and analysis

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