JP2021179435A - 中性子同時計数に基づく、ウラン・プルトニウム溶液系プルトニウム濃度推算方法およびモニタリングシステム - Google Patents
中性子同時計数に基づく、ウラン・プルトニウム溶液系プルトニウム濃度推算方法およびモニタリングシステム Download PDFInfo
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- 229910052778 Plutonium Inorganic materials 0.000 title claims abstract description 39
- OYEHPCDNVJXUIW-UHFFFAOYSA-N plutonium atom Chemical compound [Pu] OYEHPCDNVJXUIW-UHFFFAOYSA-N 0.000 title claims abstract description 38
- 238000012544 monitoring process Methods 0.000 title claims abstract description 33
- 238000000034 method Methods 0.000 title claims abstract description 30
- 229910052770 Uranium Inorganic materials 0.000 title abstract 4
- JFALSRSLKYAFGM-UHFFFAOYSA-N uranium(0) Chemical compound [U] JFALSRSLKYAFGM-UHFFFAOYSA-N 0.000 title abstract 4
- 238000001514 detection method Methods 0.000 claims abstract description 21
- 238000005259 measurement Methods 0.000 claims abstract description 12
- 238000004364 calculation method Methods 0.000 claims abstract description 7
- WJWSFWHDKPKKES-UHFFFAOYSA-N plutonium uranium Chemical compound [U].[Pu] WJWSFWHDKPKKES-UHFFFAOYSA-N 0.000 claims description 40
- 238000007405 data analysis Methods 0.000 claims description 21
- 238000011065 in-situ storage Methods 0.000 claims description 6
- 238000013480 data collection Methods 0.000 claims description 3
- 238000012545 processing Methods 0.000 claims description 3
- 238000004458 analytical method Methods 0.000 claims 1
- 230000004992 fission Effects 0.000 abstract description 28
- 230000002269 spontaneous effect Effects 0.000 abstract description 14
- 230000003595 spectral effect Effects 0.000 abstract description 5
- 238000010521 absorption reaction Methods 0.000 abstract description 2
- 230000000694 effects Effects 0.000 abstract description 2
- 239000000243 solution Substances 0.000 description 46
- 238000012986 modification Methods 0.000 description 5
- 230000004048 modification Effects 0.000 description 5
- 238000010586 diagram Methods 0.000 description 3
- -1 plutonium metal Chemical class 0.000 description 3
- 239000004698 Polyethylene Substances 0.000 description 2
- 238000010205 computational analysis Methods 0.000 description 2
- 238000012937 correction Methods 0.000 description 2
- 230000001066 destructive effect Effects 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 229920000573 polyethylene Polymers 0.000 description 2
- 238000005070 sampling Methods 0.000 description 2
- 238000004088 simulation Methods 0.000 description 2
- 239000002915 spent fuel radioactive waste Substances 0.000 description 2
- 239000006096 absorbing agent Substances 0.000 description 1
- 238000003556 assay Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- SHZGCJCMOBCMKK-KGJVWPDLSA-N beta-L-fucose Chemical compound C[C@@H]1O[C@H](O)[C@@H](O)[C@H](O)[C@@H]1O SHZGCJCMOBCMKK-KGJVWPDLSA-N 0.000 description 1
- 230000008033 biological extinction Effects 0.000 description 1
- 229910052793 cadmium Inorganic materials 0.000 description 1
- BDOSMKKIYDKNTQ-UHFFFAOYSA-N cadmium atom Chemical compound [Cd] BDOSMKKIYDKNTQ-UHFFFAOYSA-N 0.000 description 1
- 238000004422 calculation algorithm Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000000691 measurement method Methods 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 239000011259 mixed solution Substances 0.000 description 1
- ZQPKENGPMDNVKK-UHFFFAOYSA-N nitric acid;plutonium Chemical compound [Pu].O[N+]([O-])=O ZQPKENGPMDNVKK-UHFFFAOYSA-N 0.000 description 1
- 238000004886 process control Methods 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 238000001228 spectrum Methods 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- 229910002007 uranyl nitrate Inorganic materials 0.000 description 1
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01T—MEASUREMENT OF NUCLEAR OR X-RADIATION
- G01T3/00—Measuring neutron radiation
- G01T3/001—Spectrometry
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01T—MEASUREMENT OF NUCLEAR OR X-RADIATION
- G01T3/00—Measuring neutron radiation
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01T—MEASUREMENT OF NUCLEAR OR X-RADIATION
- G01T1/00—Measuring X-radiation, gamma radiation, corpuscular radiation, or cosmic radiation
- G01T1/16—Measuring radiation intensity
- G01T1/17—Circuit arrangements not adapted to a particular type of detector
- G01T1/172—Circuit arrangements not adapted to a particular type of detector with coincidence circuit arrangements
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01T—MEASUREMENT OF NUCLEAR OR X-RADIATION
- G01T1/00—Measuring X-radiation, gamma radiation, corpuscular radiation, or cosmic radiation
- G01T1/16—Measuring radiation intensity
- G01T1/17—Circuit arrangements not adapted to a particular type of detector
- G01T1/178—Circuit arrangements not adapted to a particular type of detector for measuring specific activity in the presence of other radioactive substances, e.g. natural, in the air or in liquids such as rain water
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01T—MEASUREMENT OF NUCLEAR OR X-RADIATION
- G01T3/00—Measuring neutron radiation
- G01T3/008—Measuring neutron radiation using an ionisation chamber filled with a gas, liquid or solid, e.g. frozen liquid, dielectric
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01V—GEOPHYSICS; GRAVITATIONAL MEASUREMENTS; DETECTING MASSES OR OBJECTS; TAGS
- G01V5/00—Prospecting or detecting by the use of ionising radiation, e.g. of natural or induced radioactivity
- G01V5/20—Detecting prohibited goods, e.g. weapons, explosives, hazardous substances, contraband or smuggled objects
- G01V5/281—Detecting prohibited goods, e.g. weapons, explosives, hazardous substances, contraband or smuggled objects detecting special nuclear material [SNM], e.g. Uranium-235, Uranium-233 or Plutonium-239
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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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- Measurement Of Radiation (AREA)
- Monitoring And Testing Of Nuclear Reactors (AREA)
Abstract
Description
本願は2020年5月15日に中国国家知識産権局に提出された、出願番号を202010411599.3とする特許出願の優先権を主張し、当該特許出願のすべての内容を引用によりここに援用する。
(1)すべての誘発核分裂中性子は、自発核分裂源中性子および(α,n)源中性子とほぼ同時に放出され、核分裂連鎖の長さは考慮しない。
(2)中性子検出効率および核分裂確率はサンプル内において体積的に均一であると仮定する。
(3)自発核分裂源中性子と(α,n)源中性子は同一のエネルギースペクトルを有すると仮定されるため、検出効率、核分裂確率、誘発核分裂増倍はみな同一である。
(4)中性子捕獲非核分裂の確率は無視できる。
(5)中性子多重度と中性子エネルギーは無関係である。
(6)サンプル/検出器内における中性子の消滅時間は考慮しない。
Claims (11)
- データ分析ワークステーションと複数の中性子モニタリングチャネルからなり、前記データ分析ワークステーションは、データ収集モジュールと、請求項1から7のいずれか一項に記載の推算方法で中性子同時計数の測定データを分析および処理するデータ分析処理ソフトウェアを有するデータ分析および結果出力モジュールと、警報モジュールと、を備える、中性子同時計数に基づく、ウラン・プルトニウム溶液系プルトニウム濃度モニタリングシステム。
- 前記中性子モニタリングチャネルは、中性子検出アセンブリと、中性子同時計数回路と、インサイチュ表示装置と、を備え、前記中性子検出アセンブリにより検出された初期パルス信号が前記中性子同時計数回路のリアルタイム処理を経て中性子同時計数の前記測定データを形成し、前記測定データが前記インサイチュ表示装置においてリアルタイム表示され、さらに前記データ分析ワークステーションに伝送され、前記データ収集モジュールの収集処理を経た後に前記データ分析処理ソフトウェアの計算分析に提供され、前記中性子検出アセンブリは中性子検出器および適切な減速体、遮蔽体からなる、
請求項8に記載のモニタリングシステム。 - 前記データ収集モジュールは複数のデータ収集チャネルを有する、
請求項9に記載のモニタリングシステム。 - 前記警報モジュールは、前記ウラン・プルトニウム溶液系内のプルトニウム濃度が所定の閾値を超えたと前記データ分析処理ソフトウェアが分析したときに警報信号を発する、
請求項9に記載のモニタリングシステム。
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CN202010411599.3A CN111751866B (zh) | 2020-05-15 | 2020-05-15 | 基于中子符合计数的溶液系统钚浓度估算方法及监测系统 |
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CN113791439A (zh) * | 2021-07-07 | 2021-12-14 | 中国核电工程有限公司 | 一种通过测量中子得到钆浓度的在线监测方法及系统 |
CN113866812B (zh) * | 2021-08-17 | 2024-04-12 | 中国核电工程有限公司 | 一种同时测量多个设备内钚含量的方法 |
CN113777660B (zh) * | 2021-09-15 | 2023-10-20 | 核工业航测遥感中心 | 能谱比法大气氡修正参数求取方法 |
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GB8413236D0 (en) * | 1984-05-23 | 1984-06-27 | British Nuclear Fuels Plc | Plutonium concentration measurement |
JP3524203B2 (ja) * | 1995-04-07 | 2004-05-10 | 株式会社東芝 | 中性子モニタ装置及び使用済核燃料の臨界管理方法 |
GB9810433D0 (en) * | 1997-12-12 | 1998-07-15 | British Nuclear Fuels Plc | Improvements in and relating to monitoring |
US20020163987A1 (en) * | 1997-12-12 | 2002-11-07 | British Nuclear Fuels Plc | Monitoring a sample containing a neutron source |
CN104678425B (zh) * | 2015-02-02 | 2017-03-22 | 中国原子能科学研究院 | 一种基于液体闪烁探测器的快中子多重性测量分析方法 |
CN107092028A (zh) * | 2017-05-25 | 2017-08-25 | 中国人民解放军火箭军工程大学 | 一种密闭容器核材料质量的计算方法 |
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Title |
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D. M. CIFARELLI ET AL.: "Models for a three-parameter analysis of neutron signal correlation measurements for fissile materia", NUCLEAR INSTRUMENTS AND METHODS IN PHYSICS RESEARCH SECTION A: ACCELERATORS, SPECTROMETERS, DETECTOR, vol. volume 251, issue 3, JPN6022018003, 1 November 1986 (1986-11-01), pages 550 - 563, ISSN: 0004768903 * |
S. CROFT ET AL.: "Incorporating delayed neutrons into the point-model equations routinely used for neutron coincidence", ANNALS OF NUCLEAR ENERGY, vol. 99, JPN6022018004, 21 September 2016 (2016-09-21), pages 36 - 39, XP029784454, ISSN: 0004768902, DOI: 10.1016/j.anucene.2016.08.012 * |
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GB2600505A (en) | 2022-05-04 |
CN111751866A (zh) | 2020-10-09 |
JP7083421B2 (ja) | 2022-06-10 |
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