CN-122000108-A - High-temperature neutron irradiation device

CN122000108ACN 122000108 ACN122000108 ACN 122000108ACN-122000108-A

Abstract

The application relates to a high-temperature neutron irradiation device, and belongs to the technical field of irradiation. The high-temperature neutron irradiation device comprises a plurality of irradiation containers, two heat insulation pieces and a shell, wherein a cavity for accommodating irradiation samples is arranged in each irradiation container, protruding pieces are arranged at two ends of each irradiation container along a preset direction, each irradiation container is made of zirconium, the two heat insulation pieces are respectively arranged at two ends of each irradiation container along the preset direction, the heat insulation pieces are simultaneously sleeved outside the protruding pieces of the irradiation containers, so that the irradiation containers are circumferentially distributed around the preset direction and adjacent irradiation containers are abutted to each other, the two ends of the shell along the preset direction are detachably connected with end covers, each irradiation container and each heat insulation piece are accommodated in the shell, and one end, far away from each irradiation container, of each heat insulation piece is detachably connected with the corresponding end cover. The device can realize high-temperature irradiation and irradiation environment at normal temperature outside the high-temperature shell in the shell, flexibly select samples placed in each irradiation container according to experimental requirements, has strong applicability, is convenient to assemble and has stable structure.

Inventors

LIU XIANKUN
LI HANG
ZHANG XIAOLONG
HUANG HUAN
QIAN DAZHI
FAN JIE
YAN ZHANFENG
ZHENG JIAN
Tian Jiting
WANG HAO
FENG QIJIE

Assignees

中国工程物理研究院核物理与化学研究所

Dates

Publication Date: 20260508
Application Date: 20260114

Claims (10)

1. A high temperature neutron irradiation device, comprising: the irradiation device comprises a plurality of irradiation containers, wherein each irradiation container is internally provided with a cavity for accommodating an irradiation sample, and two ends of each irradiation container along a preset direction are provided with protruding parts; The two heat insulation pieces are respectively arranged at two ends of the plurality of irradiation containers along the preset direction, and are used for being sleeved outside the protruding pieces of the plurality of irradiation containers at the same time so that the plurality of irradiation containers are circumferentially arranged around the preset direction and adjacent irradiation containers are abutted to each other; the irradiation container and the heat insulating pieces are all used for being contained in the shell, and one end of each heat insulating piece far away from the irradiation container is detachably connected with the corresponding end cover respectively.
2. The apparatus of claim 1, wherein the heat insulator is zirconia.
3. The apparatus according to claim 1, wherein the heat insulating member is adapted to be simultaneously engaged with the plurality of protruding members when being simultaneously sleeved outside the plurality of protruding members of the irradiation container.
4. The apparatus according to claim 3, wherein the heat insulating member is configured to simultaneously cover the plurality of protruding members of the irradiation container, and the plurality of protruding members located at the same end in the predetermined direction are circumferentially arranged around the predetermined direction and form a ring structure together; The heat insulating piece is provided with a through hole penetrating through the heat insulating piece along the preset direction, and the annular structure is used for being clamped with the inner wall of the through hole of the corresponding heat insulating piece.
5. The high temperature neutron irradiation device of claim 4, wherein each end cover is provided with a boss on a surface facing the heat insulating member, and an inner wall of the through hole of one end of the heat insulating member away from the irradiation container is clamped with the boss of the corresponding end cover.
6. The apparatus according to any one of claims 1 to 5, wherein one end of the irradiation container in the predetermined direction has a cover detachably connected to a base of the irradiation container and adapted to close the cavity, and the protruding member is provided on a surface of the cover away from the base.
7. The high temperature neutron irradiation device according to claim 6, wherein a limiting piece is arranged on the end face of the base body facing the sealing cover, and the limiting piece is provided with a limiting groove; the sealing cover is provided with a connecting part, and the connecting part stretches into the limiting groove and is clamped with the groove wall of the limiting groove.
8. The apparatus of claim 7, wherein the base has two limiting members disposed on opposite sides of the base, and the connecting portions of the cover are respectively configured to extend into the corresponding limiting grooves of the limiting members.
9. The high temperature neutron irradiation device of claim 6, wherein the end face of the base body facing the cover is provided with a groove, and the groove is communicated with the cavity; the irradiation container is also provided with a limiting plug, one end of the limiting plug is used for extending into the cavity, and the other end of the limiting plug is used for being clamped to the groove wall of the groove.
10. The high-temperature neutron irradiation device according to any one of claims 1 to 5, wherein the number of the irradiation containers is 4, each irradiation container is of a 1/4 cylindrical structure, and the 4 irradiation containers form a cylindrical structure when circumferentially arranged around the preset direction.

Description

High-temperature neutron irradiation device Technical Field The application relates to the technical field of irradiation, in particular to a high-temperature neutron irradiation device. Background The irradiation check test of the nuclear power material is an important link of the research and development of the nuclear power material, and the irradiation material performance data obtained through the irradiation test is important data for analyzing and evaluating the irradiation resistance of the nuclear power material, and is also a powerful support for establishing an irradiation material performance model and evaluating the safety of a reactor. The irradiation examination experiment of the nuclear power material needs to be carried out by adopting an irradiation device. With the continuous development of nuclear power materials, a high-temperature irradiation environment is sometimes needed when an irradiation device performs irradiation examination test, but the self irradiation heat generation rate of some nuclear power materials (such as a long-strip-shaped sheet nickel-based alloy sample and the like) is lower when the nuclear power materials are irradiated, so that the irradiation test is difficult to develop and difficult to realize under a higher temperature state. Disclosure of Invention The application aims to provide a high-temperature neutron irradiation device which can realize high-temperature irradiation and irradiation environment at normal temperature outside a high-temperature shell in the shell, flexibly select samples placed in each irradiation container according to experimental requirements, has strong applicability, and is convenient to assemble and disassemble and stable in structure. The application provides a high-temperature neutron irradiation device which comprises a plurality of irradiation containers, two heat insulation pieces and a shell, wherein a cavity for accommodating irradiation samples is arranged in each irradiation container, protruding pieces are arranged at two ends of each irradiation container along a preset direction, each irradiation container is made of zirconium, the two heat insulation pieces are respectively arranged at two ends of the plurality of irradiation containers along the preset direction and are sleeved outside the protruding pieces of the plurality of irradiation containers at the same time so that the plurality of irradiation containers are circumferentially arranged around the preset direction and adjacent irradiation containers are abutted against each other, end covers are detachably connected to two ends of the shell along the preset direction, each irradiation container and each heat insulation piece are accommodated in the shell, and one end of each heat insulation piece, which is far away from each irradiation container, is detachably connected with the corresponding end cover. The irradiation self-heating of the zirconium irradiation container for the high-temperature neutron irradiation device provided by the application solves the problem that the temperature in the irradiation device is difficult to reach high temperature due to low self-heating rate of a sample, and can be suitable for high-temperature irradiation of long-strip or long-strip lamellar samples. The heat insulation piece is connected with the shell and the irradiation container, so that the problem of high temperature difference between the inside and the outside of the shell is solved, and the irradiation environment with high temperature in the shell and normal temperature outside the shell is realized. In addition, through setting up a plurality of irradiation containers, can select the irradiation sample of placing in every irradiation container according to experimental demand in a flexible way, also can mark different irradiation containers as required simultaneously to distinguish different irradiation samples, the suitability is strong. The heat insulation part and the protruding parts of the plurality of irradiation containers are sleeved, so that the positioning problem between the irradiation containers and the heat insulation part is solved, the plurality of irradiation containers can be directly assembled together through the sleeving of the heat insulation part, the assembled whole structure is stable, and the plurality of irradiation containers are automatically separated after the heat insulation part is taken down, so that the operation is convenient. In an alternative embodiment of the present application, the heat insulating member is made of zirconia. In the technical scheme, the heat insulating piece is made of high-temperature-resistant heat-insulating zirconia, so that a good heat insulating effect can be realized, the problem of high temperature difference inside and outside the shell is effectively solved, and further the irradiation environment of high temperature inside the shell and normal temperature outside the shell is better realized