Heat exchanger, reactor simulation system and experimental methods of maximum and minimum passive operation capabilities of reactor

Abstract

The invention provides a heat exchanger adopted in an experiment, a reactor simulation experimental system and experimental methods of the maximum and minimum passive operation capabilities of a reactor. An experimental device comprises a first reactor and a second loop simulation system. Main equipment comprises a reactor simulator, a steam generator, a main circulation pump, a condenser, the heat exchanger, a water feed pump and a corresponding flow and temperature measuring device. The experimental methods comprise the loop heating and boosting method, the passive operation condition building method, the maximum passive operation capability experimental method and the minimum passive operation capability experimental method. The maximum passive operation capability is determined when the reactor inlet and outlet temperature difference reaches the allowed maximum value, and the minimum passive operation capability is determined when the deviation between two loop steam generator steam yields reaches the allowed maximum value. By adopting the experimental method, the maximum and minimum passive operation capabilities of the reactor coolant system can be obtained, and therefore the application range of the reactor passive operation mode can be obtained.

Description

technical field [0001] The invention belongs to the technical field of reactor thermal hydraulics and safety, and in particular relates to a heat exchanger used in a reactor simulation system, a reactor simulation system and a test method for its maximum and minimum passive operation capabilities. Background technique [0002] Passive operation is an operation mode in which the reactor coolant of a nuclear power plant flows in the pipeline driven only by the gravity pressure head formed by its own density difference and height difference. Since the passive operation does not depend on an external power source, the ability of the reactor to deal with safety accidents such as failure of the main pump can be improved, and the inherent safety of the reactor is improved. But on the other hand, since the passive operation does not rely on the circulation pump, its active adjustment ability and fault tolerance are relatively poor. Therefore, extensive testing is required before a ...

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Problems solved by technology

test results obtained under such conditions do not fully reflect the passive operation capability of the reactor system due to power limitations

In engineering practice, it is possible to adopt the passive operation mode when the power range exceeds the design. If the limit capacity of the passive operation of the reactor is not understood, it is likely to make a wrong decision and cause an accident.

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