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An emergency shutdown system and method for a subcritical reactor system

An emergency shutdown and reactor technology, applied in the field of reactor protection, can solve the problem of multiple supporting systems, and achieve the effect of emergency shutdown

Active Publication Date: 2021-04-16
CHINA NUCLEAR POWER TECH RES INST CO LTD +2
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

With this method, when a large amount of concentrated boron water is injected into the core, the reactor cannot be restarted immediately, and the core boron concentration must be diluted before the reactor can be started, and many supporting systems are required

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  • An emergency shutdown system and method for a subcritical reactor system
  • An emergency shutdown system and method for a subcritical reactor system
  • An emergency shutdown system and method for a subcritical reactor system

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Embodiment Construction

[0026] The following descriptions of the various embodiments refer to the accompanying drawings to illustrate specific embodiments in which the invention may be practiced.

[0027] The Accelerator Driven Subcritical Reactor System (ADS) is a new type of nuclear energy utilization device, which uses the high-energy protons generated by the accelerator to bombard heavy metal targets to generate high-energy spallation neutrons to drive the nuclear material in the subcritical reactor to undergo nuclear reactions and maintain the operation of the subcritical reactor. . The reactor is driven by the accelerator beam and the whole reactor is in a subcritical state. The system design does not use the control rod assembly and related driving mechanism for reactivity control, but uses a chopper to adjust the duty cycle of the proton beam pulse to change Accelerator proton beam intensity to realize the regulation and control of reactor power.

[0028] Please refer to figure 1 As shown, ...

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Abstract

The present invention provides an emergency shutdown system and method suitable for an accelerator-driven subcritical reactor system, wherein the emergency shutdown system includes a first emergency shutdown subsystem for controlling shutdown according to an emergency shutdown signal issued by a reactor protection system. The reactor circuit breaker cuts off the path between the proton source of the accelerator and the power supply system of the accelerator, and the second emergency shutdown subsystem is used to control the accelerator chopper to switch the proton beam of the accelerator to the The flow pulse duty cycle is set to the minimum value. The present invention can adopt the second emergency shutdown subsystem to realize emergency shutdown when the first emergency shutdown subsystem fails to realize emergency shutdown, thereby greatly improving the safety of the reactor.

Description

technical field [0001] The invention relates to the technical field of reactor protection, in particular to an emergency shutdown system and method for an accelerator-driven subcritical reactor system. Background technique [0002] Under the accident condition of nuclear power plant, realizing emergency shutdown is an important prerequisite to protect the safety of the reactor. For existing mature PWRs, the main way to realize emergency shutdown is to insert control rods composed of neutron poisons into the core of the reactor. Bring the reactor into a subcritical state. The process of relying on control rods to achieve emergency shutdown is: once an accident occurs in the nuclear power plant that endangers the safe operation of the reactor, the reactor protection system sends an emergency shutdown drive signal to trigger the reactor circuit breaker to trip. After the circuit breaker is opened, the control rod drive mechanism power supply After being cut off, under the acti...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G21C9/02
CPCG21C9/02G21C9/022Y02E30/30
Inventor 杨宇奇王源熊国华王洪涛郭永飞陆秀生彭锋李忠意沈超
Owner CHINA NUCLEAR POWER TECH RES INST CO LTD
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