Active and non-active combined core water injection heat lead-out device

Abstract

The invention belongs to the reactor design technology, particularly relates to an active and non-active combined core water injection heat lead-out device which structurally comprises a safety injection pipe respectively connected with a refueling water tank and a heat pipe section and a cooling pipe section of a loop. A safety injection pump is arranged on the safety injection pipe, the safety injection pump comprises two independent medium-pressure safety injection pumps and two independent low-pressure safety injection pumps, the refueling water tank is arranged at the position of a pit below an inner core of a containment vessel, the safety injection pump is arranged on the outer portion of the containment vessel, a non-active safety injection tank and a core water compensating tank are further arranged above a reactor in the containment vessel, the safety injection tank is connected with the cooling pipe section of the loop through a pipe with a control valve, and the core water compensating tank is connected between the heat pipe section and the cooling pipe section of the loop through a pipe with a control valve. The active and non-active combined core water injection heat lead-out device enables active and non-active advantages to be combined, has the advantages of redundancy, diversity, high reliability and the like, and improves safety of a nuclear power plant.

Description

technical field [0001] The invention belongs to reactor design technology, in particular to a core water injection heat derivation device combining active and passive. Background technique [0002] As a special safety facility for PWR nuclear power plants, in the event of a design basis accident, the active safety injection system can provide continuous cooling for the core and dissipate the heat in the core through a long-term cycle. In the event of an accident, the high-pressure safety injection pump automatically starts after receiving the safety injection signal, absorbs water from the refueling water tank, and injects boron-containing water into the reactor coolant system; during the recirculation injection stage, the low-pressure safety injection pump absorbs water from the pit to Achieve long-term recirculation injection. The structure of the existing reactor safety injection system is as follows: figure 1 As shown, the refueling water tank 1 is placed outside the c...

AI Technical Summary

Problems solved by technology

[0005] The safety injection system of traditional PWR nuclear power plants and the passive core make-up water tank cannot fully guarantee the safety and reliability of nuclear power plants under various accident conditions. Therefore, it is necessary to rationally integrate these systems and combine new design points. Further improve the safety redundancy of the system

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