Emergency shutdown protecting system for heavy metal cooling reactor

Abstract

The invention discloses an emergency shutdown protecting system for a heavy metal cooling reactor. The emergency shutdown protecting system comprises a heavy metal cooling reactor body, a duct, a partition and a plurality of neutron absorption balls, wherein multiple groups of fuel components are arranged in the reactor body; the duct is used for allowing heavy metal coolant to flow from bottom to top, and the fuel components are arranged on the outer periphery of the duct; the partition is arranged in the duct and located at a position below the lower end faces of the active sections of the fuel components; the neutron absorption balls are arranged in the duct and blocked by the partition; when the partition is opened, the neutron absorption balls in the heavy metal coolant floats up to the interval position, in the duct, of the active sections of the fuel components so as to absorb neutrons to achieve emergency shutdown of the heavy metal cooling reactor. The emergency shutdown protecting system can be put into operation in an active or passive manner to introduce sufficient negative reactivity to a reactor core so as to guarantee that the reactor core is constantly is a reactivity controllable state.

Description

technical field [0001] The invention relates to the field of nuclear power, in particular to an emergency shutdown protection system for a heavy metal cooling reactor. Background technique [0002] In the prior art, the emergency shutdown protection of the heavy metal cooling reactor mainly adopts the following structural scheme, 1. The structural scheme composed of the control rod emergency shutdown subsystem, wherein: the shutdown circuit breaker of the control rod emergency shutdown subsystem and the reactor The protection system is connected to receive the emergency shutdown signal sent by the reactor protection system and realize the control rod drop. 2. A structural scheme for shutting down the reactor with a temperature-triggered function, wherein: when the temperature of the coolant at the core outlet exceeds the Curie point temperature of the soft magnetic material, the soft magnetic material loses its magnetism due to its own physical properties, and the soft magne...

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Problems solved by technology

[0003] The above problems in the emergency shutdown protection of heavy metal cooled reactors are: the heavy metal coolant has a high density, and the control rod assembly needs to add counterweight materials to ensure that the control rod assembly is inserted into the core; the control rod assembly has the risk of sticking rods, resulting in some Control rods cannot be inserted into the core smoothly

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