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 plan

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