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A multi-irradiation target material irradiation test core structure, arrangement and operation method

A target material and core structure technology, applied in the field of core loading and arrangement, can solve the problems of being unable to simultaneously enter the stack and turn the surface at the same time, so as to achieve economy and high efficiency, ensure the sameness, and meet the requirements of safe operation Effect

Active Publication Date: 2022-03-25
NUCLEAR POWER INSTITUTE OF CHINA
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The technical problem to be solved by the present invention is: at present, in the irradiation of HFETR materials, materials with different target fluence requirements cannot be simultaneously put into the stack, turn the surface at the same time, and leave the stack at the same time. The purpose is to provide a multi-irradiation Target material irradiation tests the core structure and its arrangement method. Through the optimized design of the structure and arrangement method, it can effectively ensure that materials with different target fluence requirements can be put into the pile, turned at the same time, and discharged from the pile at the same time, and reach the target value at the same time and Irradiation test deviation is smaller

Method used

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  • A multi-irradiation target material irradiation test core structure, arrangement and operation method

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Embodiment 1

[0035] A multi-irradiation target material irradiation test core structure, the horizontal row cells of the HFETR core are numbered with letters from A to V from top to bottom, and the oblique row cells of the HFETR core are sequentially numbered from left to right Numbered with numbers from 1 to 12, such as figure 1 shown.

[0036] The improvement of the present invention lies in that on the basis of the original HFETR core arrangement, according to the requirements of the test sample, fast neutron fluence and test temperature of the irradiation test, combined with the structural size and neutron fluence of each irradiation channel According to the calculation of core rate and γ heating rate, the positions of G7, P15 and K7 are selected as irradiation tunnels, and an irradiation device with the target material is installed in the irradiation tunnels.

[0037] According to the structure size of the irradiation tunnel and the operating conditions of the reactor, the irradiatio...

Embodiment 2

[0043] This embodiment provides a method for arranging a core structure for a multi-irradiation target material irradiation test, specifically: using the locally optimally arranged core disclosed in Embodiment 1 to conduct a target material irradiation test, the overall arrangement method as follows:

[0044] Due to the three batches of pressure vessel materials into the reactor, the core neutron fluence rate distribution is not uniform, and the core non-uniformity coefficient is large. Therefore, in order to flatten the core neutron fluence rate distribution and reduce the non-uniformity, close to G07 Add new components to the side of the K07 position, add the old components to the side near the P15 position, and change the original lifting method. The 1SB and 2SB with greater value are finally upgraded. At the same time, in order to ensure that the HFETR has sufficient backup reactivity, the new components are arranged in the central area of ​​the active area as much as poss...

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Abstract

The invention discloses a multi-irradiation target material irradiation test core structure, arrangement and operation method, which solves the problem that materials with different target fluence requirements cannot be simultaneously put into the pile and transferred at the same time in the current HFETR material irradiation. The problem of stacking and stacking at the same time. In the present invention, the horizontal cells of the HFETR core are numbered with letters from A to V from top to bottom, the oblique cells of the HFETR core are numbered with numbers 1 to 12 from left to right, and G7, P15 and K7 are set as irradiation tunnels, and irradiation devices with target materials are installed in the irradiation tunnels; two strong absorber targets are set at the positions adjacent to G7, and one is set at the positions adjacent to K7 A strong absorber target and a beryllium block, and a beryllium block and two strong absorber targets are set adjacent to P15. The present invention can meet the effect that three batches of materials are simultaneously put into the pile, turned and turned out of the pile at the same time, and reach the target value at the same time without changing the number of fuel elements.

Description

technical field [0001] The invention relates to the field of core loading and arrangement methods, in particular to a multi-irradiation target material irradiation test core structure and an arrangement method thereof. Background technique [0002] The High Flux Engineering Test Reactor (HFETR for short) is a pressure shell-type engineering test reactor designed and constructed by my country. There is a great deal of flexibility in the core arrangement. HFETR has been in operation for more than 30 years, and has carried out various experimental research on fuel materials, isotope production and irradiation processing, and has made significant contributions to my country's national defense construction and the development of nuclear energy. [0003] In the past, research reactors irradiated multiple batches of materials with different target values, which needed to be carried out in multiple batches, which was not conducive to the progress of material research and development...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G21C5/12G21C23/00G21K5/00
CPCG21C23/00G21C5/12G21K5/00Y02E30/30
Inventor 徐涛忠朱磊刘水清杨斌邓才玉陈启兵向玉新康长虎张平马立勇
Owner NUCLEAR POWER INSTITUTE OF CHINA
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