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In-reactor neutron detector assembly for passive starting of nuclear power plant

A technology for neutron detectors and detector components, applied in nuclear power generation, nuclear reactor monitoring, reactors, etc., can solve the problems of high price, difficult transportation, storage, limited import of primary neutron sources, etc., to ensure safety. Effect

Inactive Publication Date: 2021-02-26
NUCLEAR POWER INSTITUTE OF CHINA
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The technical problem to be solved by the present invention is: the primary neutron source has the disadvantages of restricted import, difficult transportation and storage, and high price.

Method used

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  • In-reactor neutron detector assembly for passive starting of nuclear power plant
  • In-reactor neutron detector assembly for passive starting of nuclear power plant
  • In-reactor neutron detector assembly for passive starting of nuclear power plant

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Embodiment Construction

[0030] Before any embodiment of the invention is described in detail, it is to be understood that the invention is not limited in application to the details of construction shown in the following description or in the accompanying drawings. The invention is capable of other embodiments and of being practiced or of being carried out in various ways. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative improvements belong to the protection scope of the present invention.

[0031] An in-core neutron detector assembly for passive start-up of nuclear power plants, such as Figure 1-3 As shown, the detector assembly runs through the top cover of the pressure vessel, the detector assembly includes a core body 6, and the core body 6 includes a plurality of fission chambers 4 sensitive to neutrons, and the fission chambers 4 are immersed in the core active part.

[0032] Further, it also incl...

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Abstract

The invention discloses an in-reactor neutron detector assembly for passive starting of a nuclear power plant, relates to the field of passive starting in-reactor neutron detectors, and solves the problem of primary neutron source monitoring. The device comprises a detector assembly penetrating through a top cover of the pressure vessel, wherein the detector assembly comprises a core body (6), thecore body (6) comprises a plurality of fission chambers (4) sensitive to neutrons, and the fission chambers (4) are located at an active section of a reactor core. According to the invention, the nuclear power plant can cancel a neutron source for the first time in the reactor core loading and critical reaching process, the whole reactor core state is monitored by monitoring neutrons generated byspontaneous fission of the new fuel assembly, and the safety of the nuclear reactor is ensured.

Description

technical field [0001] The invention relates to a neutron detector in a passive start-up reactor, in particular to a neutron detector assembly in a reactor for passive start-up of a nuclear power plant. Background technique [0002] At present, nuclear power plants at home and abroad (except Russia's VVER reactor type) will introduce a neutron source into the core to increase the level of neutron fluence rate in the core during the first fuel loading and reaching the critical process, so that the whole reactor can be monitored by corresponding instruments. The state of the core during core charging and critical process is monitored to ensure the safety of the reactor. [0003] The primary neutron source has disadvantages such as restricted import, difficult transportation and storage, and high price. Cancellation of primary neutron sources will become a trend in the development of nuclear power technology, which will greatly improve the advanced nature, economy and safety o...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G21C17/10
CPCG21C17/10Y02E30/30
Inventor 林超蒋朱敏蒋天植秦雪李文平王帅李海颖王华金周金满苟拓张芸王银丽黄有骏沈峰喻恒
Owner NUCLEAR POWER INSTITUTE OF CHINA
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