Heat treatment recovery technology for radiation damage of reactor device

Abstract

A heat treatment recovery technology for radiation damage of a reactor device. By virtue of the heat treatment technology and device, radiation damage of important apparatuses, for example, a main container of a molten salt reactor and reactor fuel element cladding, in a reactor core can be repaired for many times either in the field of a reactor or near an apparatus in situ, either in a working state or a non-working state, and either in an integral manner or a part manner; radiation defects of the apparatuses are reduced or eliminated, and the original performances of the apparatuses are partially or fully recovered, thereby significantly expanding the radiation resistant use range and prolonging the service life of existing materials and achieving designed function requirements of a radiation resistant dosage which cannot be achieved before by using the existing materials: for example, achieving high fuel consumption; prolonging the service life of the overall reactor and the like; and reducing the operation cost of the reactor and improving the overall benefits thereof. No cladding materials can achieve requirements of the high fuel consumption reactor at present, so that the designed function requirements cannot be achieved. Application of the technology makes it possible to develop and achieve those advanced reactors which must achieve high fuel consumption.

Description

technical field [0001] The invention relates to a technology for recovering radiation damage of device materials in the reactor core, in particular to a technology for recovering the radiation damage of devices in the core of a high burnup reactor by in-situ or on-site heat treatment. Background technique [0002] The reactor is a complex multi-technology, multi-system integrated large system. Can use solid nuclear fuel or liquid nuclear fuel, also can use thermal neutron or fast neutron energy spectrum. Therefore, the technologies involved in the different types of reactors vary greatly. But there are also commonalities. [0003] The working conditions in the reactor core, especially in the fast neutron reactor core, are mostly high temperature, high corrosion, high pressure and high radiation intensity. The difficulty and the cost of using and updating these materials. [0004] Fast neutrons will knock atoms in alloy structural materials etc. away from the original lat...

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Problems solved by technology

[0009] In order to overcome the short service life of the structural materials in the core of the existing reactor, especially the structural materials in the core of the fast neutron reactor, which cannot meet the research and development requirements of advanced reactors, the invention provides a recovery technology for material radiation damage, especially In-situ or on-site heat treatment recovery technology for materials such as cladding, molten salt reactor main vessel and components, etc., which can not only repair radiation damage to materials in the core, but also in-situ or on-site repair materials in the core radiation damage, greatly extend the service life of devices in the core, reduce reactor operating costs and device renewal costs, and achieve high benefits, high efficiency and high burnup

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