Loop testing system and method thereof

Abstract

The invention discloses a loop testing system used for carrying out thermal transient impact tests and high-temperature durability tests on a tested pump. The loop testing system comprises a cold source supply loop assembly, a hot source supply loop assembly and a controller, wherein the cold source supply loop assembly and the hot source supply loop assembly are connected to the tested pump through pipelines respectively; the controller is connected to the tested pump, an electric appliance part of the cold source supply loop assembly and an electric appliance part of the hot source supply loop assembly through circuits. The invention further discloses a testing method of the loop testing system. The system has the self-feedback adjusting function, test temperature and time requirements can be precisely controlled, and meanwhile operation safety is improved; a method for balancing the temperature through cold and heat mixing is adopted, the thermal transient impact tests and the high-temperature durability tests are realized in the same loop testing system, and the operation method is simple and convenient.

Description

technical field [0001] The invention relates to the field of nuclear safety level equipment test verification, in particular to a test loop system and a method thereof. Background technique [0002] Containment sprinkler pumps, low-pressure safety injection pumps and top-charge pumps with nuclear safety functions in nuclear power plants, under abnormal conditions (such as LOCA accidents), the fluid medium transported will change from a low-temperature state (the minimum temperature is generally set to 7 °C) to instantaneously switch to the high temperature state of containment pit water (not lower than 120 °C), that is to say, these pumps must not only be able to operate normally at low temperatures, but also be able to withstand the thermal transient impact of the fluid medium and the Continued normal operation at elevated temperatures. In order to verify whether these nuclear safety level pumps meet the above functional requirements, passing the test is a relatively relia...

AI Technical Summary

Problems solved by technology

[0004] (1) The test function realized is single, either only the impact test of thermal transient can be realized, or the durability test under high temperature condition can only be realized;

[0005] (2) Poor adjustability. Some test benches can carry out both thermal transient impact test and continuous normal operation test at high temperature, but du

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