CN-122016384-A - Sampling device and sampling method

CN122016384ACN 122016384 ACN122016384 ACN 122016384ACN-122016384-A

Abstract

The invention relates to the technical field of nuclear equipment. The invention provides a sampling device and a sampling method. The sampling device comprises a supporting component, a mobile execution component and a sampling component, wherein the supporting component is used for being connected with a reactor pressure container, the mobile execution component is connected with the supporting component, a part of structure of the mobile execution component is located outside the reactor pressure container, the mobile execution component is provided with a mobile end extending into the reactor pressure container, the sampling component is located in the reactor pressure container and comprises a connecting part, a sampling part and a counteracting part, the connecting part is connected with the mobile end, the counteracting part and the sampling part are connected with the connecting part, the counteracting part and the sampling part are movable relative to the reactor pressure container under the driving of the mobile end, the sampling part is used for drilling a sampling object, and the counteracting part is used for being fixedly adsorbed with the inner wall of the reactor pressure container so as to counteract the reaction force generated by drilling of the sampling part. Thus, drilling and sampling operations can be completed in situ before disassembly.

Inventors

YUE NING
CHEN JIAN
XU ZIYI
DAI LEI
CAI JIAWEI
CAO JUNJIE
SHEN GUANGMING
CHEN XISAN
HU DONGMEI
HE WEN
WEN XIAOJUN
LONG TAO
ZHANG YONGLING

Assignees

中国核动力研究设计院

Dates

Publication Date: 20260512
Application Date: 20260309

Claims (10)

1. A sampling device, comprising: a support assembly for connection to a reactor pressure vessel; A moving execution assembly connected with the support assembly, part of the moving execution assembly being positioned outside the reactor pressure vessel, the moving execution assembly having a moving end extending into the reactor pressure vessel, and The sampling assembly is located in the reactor pressure vessel and comprises a connecting portion, a sampling portion and a counteracting portion, the connecting portion is connected with the moving end, the counteracting portion and the sampling portion are connected with the connecting portion, the counteracting portion and the sampling portion are driven by the moving end to move relative to the reactor pressure vessel and are used for drilling sampling objects, and the counteracting portion is used for being fixedly adsorbed and counteracted with the inner wall of the reactor pressure vessel so as to counteract reaction force generated by drilling of the sampling portion.
2. The sampling device of claim 1, wherein the sampling portion comprises a first moving member, a second moving member and a sampling member, the first moving member is connected with the connecting portion, the second moving member is connected between the first moving member and the sampling member, the first moving member drives the second moving member and the sampling member to rotate together around an axis, and the second moving member drives the sampling member to move in a direction perpendicular to the axis.
3. The sampling device of claim 2, wherein the second moving member comprises a mounting plate, a guide rail, a sliding table and a driving member, the mounting plate is connected with the first moving member, the guide rail is arranged on the mounting plate, the sliding table is in sliding connection with the guide rail, the sliding table is connected with the sampling member, the output end of the driving member is connected with the sliding table, and the sliding table drives the sampling member to move under the driving of the driving member.
4. A sampling device according to claim 3, wherein the sampling member comprises a drilling member and a drive mechanism for driving the drilling member into operation, the drive mechanism being associated with the slide table, the drilling member comprising a solid boring and/or coring bit.
5. The sampling device of claim 4, wherein the sampling portion comprises a sample collection member comprising a telescoping shield enclosing a sealed space and an elastic member having a drilling end positioned within the sealed space, the elastic member applying a force to the telescoping shield to urge the telescoping shield against a sampling object.
6. The sampling device of claim 5, wherein a connecting frame is arranged on the periphery of the driving mechanism, a telescopic guide column is arranged on the connecting frame, the elastic piece is sleeved on the periphery of the telescopic guide column, the telescopic cover comprises a telescopic cylinder and a sealing cover, the telescopic cylinder is connected with one end, far away from the connecting frame, of the telescopic guide column, the sealing cover is communicated with one end, far away from the telescopic guide column, of the telescopic cylinder, a through hole is formed in one end, far away from the telescopic cylinder, of the sealing cover, the inner diameter of the sealing cover gradually increases from the through hole to the direction of the telescopic cylinder, a suction pipe is connected to the side wall of the sealing cover, the suction pipe is communicated with the sealing space, and a sealing ring surrounding the through hole is arranged on one side, facing the sampling object, of the sealing cover.
7. The sampling device of claim 6, wherein the suction tube is in communication with a pump body, a filter assembly is disposed between the pump body and the suction tube, and both the pump body and the filter assembly are located outside of the reactor pressure vessel.
8. The sampling device of claim 7, wherein the filter assembly comprises a filter housing, a filter screen and a filter cover, wherein an inlet of the filter housing is communicated with the suction tube, an outlet of the filter housing is communicated with the pump body, the filter screen is arranged in the filter housing, the filter screen is positioned between the inlet and the outlet to filter waste liquid flowing through, a disassembly opening is formed in the top of the filter housing, and the filter cover is arranged on the top of the filter housing in an openable and closable manner to expose or seal the disassembly opening.
9. The sampling device of claim 1, wherein the movement execution assembly comprises a mounting frame and a moving member, the mounting frame is connected with the supporting assembly, the moving member is connected with the mounting frame, the moving end is formed at the end of the moving member, the moving member drives the sampling assembly to move in a first direction, a second direction and a third direction relative to the reactor pressure vessel, the moving member drives the sampling assembly to rotate in a preset plane, the first direction, the second direction and the third direction meet a vertical condition, and the preset plane and the third direction meet a vertical condition.
10. A sampling method, characterized in that the sampling object is sampled with a sampling device according to any one of claims 1 to 9.

Description

Sampling device and sampling method Technical Field The invention relates to the technical field of nuclear equipment, in particular to a sampling device and a sampling method. Background The reactor pressure vessel and the internals are the core radioactive structural components of the nuclear reactor, and the retirement disposal of the reactor requires the acquisition of accurate material composition and nuclide distribution data before the waste classification, packaging and final disposal can be performed. Currently, the technology for processing reactor pressure vessels and internals mainly employs cutting and breaking up and integral packaging. The large-scale structural members such as the reactor pressure vessel, the in-pile members and the like are divided into a plurality of large blocks or sections which are convenient to transport and dispose through special cutting equipment, and the divided members or the whole undetached members are sealed and wrapped so as to realize safe transport and dispose. However, the disassembly device belongs to a large-scale disassembly operation, the whole structure size of the adopted disassembly device is large, and the operation in a narrow space of a reactor is difficult to implement. In addition, the precision of the disassembly operation is low, the cutting product can not meet the requirement of a refined sample required by nuclide analysis, and the sampling before disassembly or in situ can not be realized. Disclosure of Invention In order to at least partially solve the problems of the prior art, according to one aspect of the present invention, a sampling device is provided. The sampling device comprises: The support assembly is used for being connected with the reactor pressure vessel; A movable execution assembly connected with the support assembly, part of the movable execution assembly is arranged outside the reactor pressure vessel and provided with a movable end extending into the reactor pressure vessel, and The sampling assembly is located in the reactor pressure vessel and comprises a connecting portion, a sampling portion and a counteracting portion, the connecting portion is connected with the moving end, the counteracting portion and the sampling portion are connected with the connecting portion, the counteracting portion and the sampling portion are movable relative to the reactor pressure vessel under the driving of the moving end, the sampling portion is used for drilling a sampling object, and the counteracting portion is used for being fixedly adsorbed to the inner wall of the reactor pressure vessel to counteract the reaction force generated by drilling of the sampling portion. The sampling portion includes a first moving member, a second moving member, and a sampling member, where the first moving member is connected to the connecting portion, the second moving member is connected between the first moving member and the sampling member, the first moving member drives the second moving member and the sampling member to rotate together around an axis, and the second moving member drives the sampling member to move in a direction perpendicular to the axis. The second moving part comprises a mounting plate, a guide rail, a sliding table and a driving part, wherein the mounting plate is connected with the first moving part, the guide rail is arranged on the mounting plate, the sliding table is in sliding connection with the guide rail, the sliding table is connected with the sampling part, the output end of the driving part is connected with the sliding table, and the sliding table drives the sampling part to move under the driving of the driving part. Illustratively, the sampling member includes a drilling member and a drive mechanism for driving the drilling member into operation, the drive mechanism being coupled to the slide table, the drilling member including a drilling and boring integrated cutter and/or a core drill. Illustratively, the sampling portion includes a sample collection member including a telescoping shield enclosing a sealed space and an elastic member having a drilling end located in the sealed space, the elastic member applying a force to the telescoping shield to urge the telescoping shield against the sampling object. Illustratively, the periphery of actuating mechanism is provided with the link, be provided with flexible guide post on the link, the periphery of flexible guide post is located to the elastic component cover, flexible cover includes flexible section of thick bamboo and sealed cowling, flexible section of thick bamboo is kept away from the one end of link with flexible guide post and is connected, sealed cowling is kept away from the one end intercommunication of flexible guide post with flexible section of thick bamboo, the sealed cowling is kept away from the one end of flexible section of thick bamboo and is had the opening, the internal diameter of sealed cowling is crescent from the direction of op