Spiral ultra-long cooling loop irradiation device

Abstract

The invention discloses a spiral ultra-long cooling loop irradiation device, which is characterized in that an inner-layer annular space is formed between an inner-layer irradiation tank and a middle-layer irradiation tank, and an outer-layer annular space is formed between the middle-layer irradiation tank and an outer-layer irradiation tank; a sample is arranged on a clamping block, and the clamping block is arranged in the inner-layer annular space; an outer-layer cooling pipe and an inner-layer cooling pipe are both wound on the outer wall of the middle-layer irradiation tank; a water outlet of the outer-layer cooling pipe is communicated with the outer-layer annular space at the bottom of the outer-layer irradiation tank; a water outlet of the inner-layer cooling pipe is communicatedwith the bottom of the inner-layer irradiation tank; the inner-layer irradiation tank is communicated with the outer-layer annular space through a one-way valve; a circulating water outlet pipe is arranged at the top of the outer-layer irradiation tank and is communicated with the outer-layer annular space. According to the spiral ultra-long cooling loop irradiation device, the problem that the axial temperature of an irradiation device is not uniform is solved, the inner spiral cooling circulation loop and the outer spiral cooling circulation loop are arranged to control the temperature in the irradiation device, and it is guaranteed that the temperatures of all material samples in the irradiation device are close.

Description

technical field [0001] The invention relates to the technical field of nuclear industry, in particular to a spiral super-long cooling circuit irradiation device. Background technique [0002] The nuclear industry has entered a stage of vigorous development, and the demand for various new nuclear materials continues to increase. Before the new material is put into use, it is necessary to verify the physical and chemical properties of the material on the test reactor to ensure that the new material can meet the design and operation requirements of the reactor. For the irradiation of samples in the pile, the samples cannot be directly placed in the pile for testing. It is necessary to process the irradiated materials into irradiated samples that meet various performance tests, arrange and clamp them according to certain rules, and then enter into the pile with the irradiation device. inside the heap. [0003] At present, the irradiation devices in the test reactor mostly use ...

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Problems solved by technology

[0004] The technical problem to be solved by the present invention is that due to the structural characteristics of the reactor itself, there is a difference in the neutron fluence in the axial direction of the irradiation tunnel, resulting in uneven temperature in the axial direction, and there is a difference in the temperature of the material sample in the irradiation device. The purpose is to provide A spiral ultra-long cooling circuit irradiation device to solve the above problems

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