Passive residual heat removal system of marine nuclear power device

Abstract

The invention discloses a passive residual heat removal system of a marine nuclear power device. The passive residual heat removal system comprises a containment and a cooling heat exchanger. The containment is internally provided with a reactor pressure vessel, a loop cool pipe section, a loop heat pipe section, a steam generator, a refueling water tank, a 1# residual heat removal heat exchanger, a 2# residual heat removal heat exchanger and a cooling water pipe bundle; the refueling water tank is arranged at the top of the containment; the reactor pressure vessel and the steam generator are connected with the heat pipe section through the loop cool pipe section; the inlet and the outlet of the 1# residual heat removal heat exchanger are respectively connected with the loop heat pipe section and the loop cool pipe section; a main steam pipeline and a water supply pipeline which are connected with the inlet and the outlet of the 2# residual heat removal heat exchanger are arranged on the steam generator; upper and lower ends of the cooling water pipe bundle are respectively connected with the inlet and the outlet of the cooling heat exchanger. The passive residual heat removal system of the marine nuclear power device is independent from external power, is improved in capability of removing residual heat of reactor core through natural circulation, is improved in safety redundancy, power and operation stability, and guarantees operation safety of nuclear reactor.

Description

technical field [0001] The invention relates to the technical field of reactor safety facilities, in particular to a passive waste heat discharge system of a marine nuclear power plant. Background technique [0002] In today's world where the energy crisis is becoming increasingly prominent and the environment is deteriorating, the use of nuclear energy has attracted more and more attention. Due to the high energy density of nuclear fuel, easy control of the operating characteristics of nuclear power plants, and large power generation, nuclear powered ships have unique advantages over conventional powered ships. The United States, Russia, China, Japan and other countries are vigorously developing nuclear-powered ships. In order to avoid similar Chernobyl nuclear accidents and Fukushima nuclear accidents, the safety of marine nuclear power devices has become a top priority. [0003] After the nuclear reactor is shut down, the fission fragments generated by fission in the cor...

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Problems solved by technology

[0005] The passive waste heat removal system used in the AP1000 nuclear power technology that has been applied to nuclear power plants has the following two problems. One is that the safety redundancy is low, and the waste heat removal heat exchanger is only connected to the primary circuit. The flow rate of the natural circulation is limited, so the speed of waste heat discharge is limited; the second is that the heat is not taken out of the containment, and after absorbing the heat brought by the waste heat discharge heat exchanger, the water in the refueling water tank directly evaporates to the containment space , increasing the difficulty of pressure and temperature control in the containment

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