Spent fuel extractant alpha particle irradiation system based on cyclotron and irradiation method thereof

Abstract

The invention discloses a spent fuel extractant alpha particle irradiation system based on a cyclotron and an irradiation method thereof. The irradiation system comprises the cyclotron, a beam energyreduction and transmission system, a solid / liquid extractant irradiation target chamber and an online measurement and control system which are connected in sequence; the solid / liquid extractant irradiation target chamber comprises a vacuum chamber and solid / liquid extractant sample chambers installed in the vacuum chamber. The online measurement and control system comprises a beam measurement chamber, a temperature control assembly connected with the solid / liquid extractant sample chamber, a gas phase mass spectrometer connected with the solid extractant sample chamber, a liquid circulation control assembly connected with the liquid extractant sample chamber, and a liquid phase mass spectrometer connected with the liquid circulation assembly. The spent fuel extractant alpha particle irradiation effect under the real working condition can be accurately simulated, alpha particle irradiation can be conducted on the liquid extractant and the solid extractant, and the purpose of online measurement and analysis of radiolysis products of the extractants is achieved.

Description

technical field [0001] The invention belongs to the technical field of nuclear fuel cycle research and application, and relates to the irradiation technology of spent fuel extractant, in particular to a cyclotron-based spent fuel extractant α particle irradiation system and an irradiation method thereof. Background technique [0002] The spent fuel produced by nuclear energy utilization contains highly radioactive nuclides such as U and Pu, which has become a long-term safety hazard. How to reprocess spent fuel safely, effectively and economically has become a major scientific and engineering issue for the sustainable development of nuclear energy. The main candidate for disposal of spent fuel is the addition of extraction processes to the nuclear fuel cycle. The selection of extractant is the basis for engineering application, which should not only have excellent extraction performance, but also have good radiation stability and reliability. In the process of spent fuel r...

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Problems solved by technology

[0007] Aiming at the technical problems existing in the existing particle accelerator-based extraction agent α-particle irradiation system, such as difficulty in accurately simulating the α-particle irradiation effect of the extractant, inability to analyze radiolysis products on-line, and inability to control the irradiation temperature of the extraction agent, the invention’s The purpose is to provide a cyclotron-based spent fuel extraction agent α particle irradiation system and its irradiation method, which can accurately simulate the actual working conditions in accordance with the technical requirements of the extraction agent α particle irradiation effect under actual working conditions. α-particle irradiation effect of the spent fuel extractant, and online acquisition of the relationship between the irradiation temperature and the gas-phase or liquid-phase radiolysis products, and the irradiation effect of the extractant

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