CN111933320A - Method for performing on-pile test verification of neutron detector by using standard detector - Google Patents
Method for performing on-pile test verification of neutron detector by using standard detector Download PDFInfo
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- CN111933320A CN111933320A CN202010807748.8A CN202010807748A CN111933320A CN 111933320 A CN111933320 A CN 111933320A CN 202010807748 A CN202010807748 A CN 202010807748A CN 111933320 A CN111933320 A CN 111933320A
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- G—PHYSICS
- G21—NUCLEAR PHYSICS; NUCLEAR ENGINEERING
- G21C—NUCLEAR REACTORS
- G21C17/00—Monitoring; Testing ; Maintaining
- G21C17/06—Devices or arrangements for monitoring or testing fuel or fuel elements outside the reactor core, e.g. for burn-up, for contamination
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E30/00—Energy generation of nuclear origin
- Y02E30/30—Nuclear fission reactors
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Abstract
The invention discloses a method for performing on-reactor test verification on a neutron detector by using a standard detector, which is used for performing on-reactor test verification and calibration on self-powered detector research and development production and supply products in a reliable and credible mode and can be applied to self-powered detector calibration and test verification for most nuclear power station reactor core instrument systems.
Description
Technical Field
The invention relates to the technical field of on-reactor tests of neutron detectors in reactor cores of nuclear power plants, in particular to a method for on-reactor test verification of neutron detectors by using a standard detector.
Background
The core instrumentation system is a key system for in-core neutron fluence rate measurements during reactor operation. In the normal operation process of the nuclear power station, the reactor pressure vessel is in a harsh environment with high temperature, high pressure and high radiation. When the reactor operating power is above 20% of the rated power, the reactor core instrumentation system is required to continuously monitor the current neutron fluence rate value, remind the operator of the reactor safety margin, and control the reactivity accordingly.
An Incore Instrumentation Thimble Assembly (IITA) is used in an incore instrumentation system. The core instrumentation thimble assembly includes a plurality of self-powered neutron detectors (SPDs) enclosed within a housing. The self-powered detector generates a response proportion current signal in the reactor by absorbing neutrons through the physical characteristics of the sensitive materials therein. And for the key nuclear characteristic parameters of the self-powered detector, corresponding verification must be carried out through on-stack test examination. Sensitivity analysis can be carried out on various parameters of the self-powered detector through on-pile tests, and research, development and production results of the self-powered detector can be visually verified.
At present, nuclear power is greatly developed and the scale is continuously enlarged in China, the demand for reactor core instrument sleeve assemblies (especially internal self-powered detector elements) is increased day by day, and the national rate of production of nuclear measuring instruments is required to be improved. The test method for verifying, producing, researching and developing self-powered detectors by adopting the standard detectors is not applied in China.
The method for performing on-stack test verification on the neutron detector by using the standard detector is characterized in that firstly, the standard detector is calibrated on a reactor, and then on-stack test verification of a developed or produced detector is performed through the standard detector. The invention is suitable for on-reactor test verification of the neutron self-powered detector for the nuclear reactor core instrument system of the nuclear power station by adopting a reliable and credible mode.
Disclosure of Invention
The invention aims to solve the problems in the background art and provides a method for performing on-stack test verification on a neutron detector by using a standard detector.
In order to achieve the purpose, the invention adopts the following technical scheme: a method for performing on-stack test validation of a neutron detector using a standard detector, comprising the steps of:
the method comprises the following steps: the standard detector is placed in the dry type enclosing barrel in a reliable fixing mode, the rear end of the detector is led out through a signal wire and can be connected to acquisition equipment for data collection in the test process;
step two: placing the dry type enclosure barrel in the first step into a pore channel of the test pile;
step three: starting the reactor, increasing the power to a power step set by the test scheme, and performing absolute calibration on the pore channel and the standard detector by adopting a set mature reactor test calibration method;
step four: the self-powered detector element which needs to be subjected to on-pile test verification is reliably fixed around a fixed support, and the rear end of the detector is led out through a signal wire and can be connected to acquisition equipment for data collection in the test process;
step five: and (3) placing the fixing support in the fourth step into the dry type enclosure barrel in the third step, placing the dry type enclosure barrel into a test pore channel, starting the reactor, and raising the power to a power step set by a test scheme to perform relative calibration of the to-be-verified self-powered detector.
In the method for performing on-stack test verification of a neutron detector by using a standard detector, the calibration method in the third step is an active sheet method.
Compared with the prior art, the method for performing on-pile test verification on the neutron detector by using the standard detector has the advantages that:
1. the invention carries out on-reactor test verification and calibration on self-powered detector research and development production and supply products in a reliable and credible mode, and can be applied to self-powered detector calibration and test verification for most nuclear power station reactor core instrument systems.
2. The dry type surrounding barrel with the standard detector can be repeatedly used, and can be used for performing on-pile test calibration on self-powered detectors which are researched and produced in batches.
Drawings
FIG. 1 is a front perspective view of a dry type enclosure of the present invention;
FIG. 2 is a front view of the fixing bracket of the present invention;
fig. 3 is a schematic top view of the fixing bracket of the present invention.
Detailed Description
The following examples are for illustrative purposes only and are not intended to limit the scope of the present invention.
Examples
A method for performing on-stack test validation of a neutron detector using a standard detector, comprising the steps of:
the method comprises the following steps: the standard detector is placed in the dry type enclosing barrel in a reliable fixing mode, the rear end of the detector is led out through a signal wire and can be connected to acquisition equipment for data collection in the test process;
step two: placing the dry type enclosure barrel in the first step into a pore channel of the test pile;
step three: starting the reactor, increasing the power to a power step set by the test scheme, and performing absolute calibration on the pore channel and the standard detector by adopting a set mature reactor test calibration method;
step four: the self-powered detector element which needs to be subjected to on-pile test verification is reliably fixed around a fixed support, and the rear end of the detector is led out through a signal wire and can be connected to acquisition equipment for data collection in the test process;
step five: and (3) placing the fixing support in the fourth step into the dry type enclosure barrel in the third step, placing the dry type enclosure barrel into a test pore channel, starting the reactor, and raising the power to a power step set by a test scheme to perform relative calibration of the to-be-verified self-powered detector.
The calibration method in the third step is an activated sheet method.
The reactor pool has a test tunnel for on-pile test verification of a self-powered detector. Before the on-pile test verification work is carried out, the test pore channel and the standard detector are calibrated, the main calibration method is an active sheet method, namely, active sheets are attached to the pore channel at certain intervals along the axial direction, irradiation activation is carried out under a set power step after the reactor is started, and activation data are collected after the calibration test is finished so as to carry out test calibration on the pore channel and the standard detector.
And carrying out absolute calibration of the standard detector. As shown in figure 1, a dry-type enclosure barrel is inserted into a reactor pore channel, wherein one or more standard self-powered detectors can be reliably fixed in the dry-type enclosure barrel, the rear ends of the detectors are led out through signal wires, and the detectors can be connected with acquisition equipment for data collection in the test process. And starting the reactor, increasing the power to a power step set by the test scheme, and acquiring the signal of the detector through the signal acquisition equipment and carrying out absolute calibration.
And after the absolute calibration of the standard detector is completed, on-stack test verification of the self-powered detector is carried out. As shown in fig. 2 and 3, the self-powered detector element to be verified is securely fixed around a fixed support, and the rear end of the detector is led out through a signal line and can be accessed to acquisition equipment for data collection during the test. And (3) placing a fixed bracket (containing a fixed to-be-verified self-powered detector) in the dry type enclosure barrel, starting the reactor, raising the power to a power step set by a test scheme, carrying out relative calibration on the to-be-verified self-powered detector, and finally completing on-stack test verification on the self-powered detector through data acquisition and processing.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.
Claims (2)
1. A method for performing on-pile test verification of a neutron detector by using a standard detector is characterized by comprising the following steps:
the method comprises the following steps: the standard detector is placed in the dry type enclosing barrel in a reliable fixing mode, the rear end of the detector is led out through a signal wire and can be connected to acquisition equipment for data collection in the test process;
step two: placing the dry type enclosure barrel in the first step into a pore channel of the test pile;
step three: starting the reactor, increasing the power to a power step set by the test scheme, and performing absolute calibration on the pore channel and the standard detector by adopting a set mature reactor test calibration method;
step four: the self-powered detector element which needs to be subjected to on-pile test verification is reliably fixed around a fixed support, and the rear end of the detector is led out through a signal wire and can be connected to acquisition equipment for data collection in the test process;
step five: and (3) placing the fixing support in the fourth step into the dry type enclosure barrel in the third step, placing the dry type enclosure barrel into a test pore channel, starting the reactor, and raising the power to a power step set by a test scheme to perform relative calibration of the to-be-verified self-powered detector.
2. The method for on-stack test validation of neutron detectors using standard detectors according to claim 1, wherein the calibration method in step three is an active sheet method.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202010807748.8A CN111933320A (en) | 2020-08-12 | 2020-08-12 | Method for performing on-pile test verification of neutron detector by using standard detector |
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| CN202010807748.8A CN111933320A (en) | 2020-08-12 | 2020-08-12 | Method for performing on-pile test verification of neutron detector by using standard detector |
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0587977A (en) * | 1991-09-27 | 1993-04-09 | Toshiba Corp | Method for arranging neutron detector |
| US20110002432A1 (en) * | 2009-07-01 | 2011-01-06 | Westinghouse Electric Company Llc | Incore instrument core performance verification method |
| CN205122203U (en) * | 2015-09-30 | 2016-03-30 | 岭东核电有限公司 | Nuclear power station out -pile neutron measurement system's detector verification, strike -machine device |
-
2020
- 2020-08-12 CN CN202010807748.8A patent/CN111933320A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0587977A (en) * | 1991-09-27 | 1993-04-09 | Toshiba Corp | Method for arranging neutron detector |
| US20110002432A1 (en) * | 2009-07-01 | 2011-01-06 | Westinghouse Electric Company Llc | Incore instrument core performance verification method |
| CN205122203U (en) * | 2015-09-30 | 2016-03-30 | 岭东核电有限公司 | Nuclear power station out -pile neutron measurement system's detector verification, strike -machine device |
Non-Patent Citations (2)
| Title |
|---|
| 李树成,胡铸萱: "CAP 1400核电厂堆芯钒自给能中子探测器设计与验证", 《核电子学与探测技术》, vol. 38, no. 5, 20 September 2018 (2018-09-20), pages 700 * |
| 薛泓元等: "自给能探测器堆上试验方法研究", 《机电信息》, vol. 2020, no. 18, 24 June 2020 (2020-06-24), pages 42 * |
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