JP7015407B1 - 蒸気発生器の分解方法 - Google Patents
蒸気発生器の分解方法 Download PDFInfo
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- JP7015407B1 JP7015407B1 JP2021159780A JP2021159780A JP7015407B1 JP 7015407 B1 JP7015407 B1 JP 7015407B1 JP 2021159780 A JP2021159780 A JP 2021159780A JP 2021159780 A JP2021159780 A JP 2021159780A JP 7015407 B1 JP7015407 B1 JP 7015407B1
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- heat transfer
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- 238000000034 method Methods 0.000 claims abstract description 37
- 238000010438 heat treatment Methods 0.000 claims abstract description 28
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 25
- 238000000354 decomposition reaction Methods 0.000 claims abstract description 14
- 238000012790 confirmation Methods 0.000 claims description 6
- 230000000007 visual effect Effects 0.000 claims description 6
- 230000000149 penetrating effect Effects 0.000 claims description 4
- 239000003344 environmental pollutant Substances 0.000 abstract description 4
- 231100000719 pollutant Toxicity 0.000 abstract description 4
- 238000009792 diffusion process Methods 0.000 abstract description 3
- 238000010586 diagram Methods 0.000 abstract description 2
- 239000000498 cooling water Substances 0.000 description 19
- 238000000605 extraction Methods 0.000 description 3
- 238000005192 partition Methods 0.000 description 3
- 238000011109 contamination Methods 0.000 description 2
- 238000010248 power generation Methods 0.000 description 2
- 239000000941 radioactive substance Substances 0.000 description 2
- 238000003466 welding Methods 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23P—METAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
- B23P19/00—Machines for simply fitting together or separating metal parts or objects, or metal and non-metal parts, whether or not involving some deformation; Tools or devices therefor so far as not provided for in other classes
- B23P19/02—Machines for simply fitting together or separating metal parts or objects, or metal and non-metal parts, whether or not involving some deformation; Tools or devices therefor so far as not provided for in other classes for connecting objects by press fit or for detaching same
- B23P19/025—For detaching only
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F22—STEAM GENERATION
- F22B—METHODS OF STEAM GENERATION; STEAM BOILERS
- F22B37/00—Component parts or details of steam boilers
- F22B37/002—Component parts or details of steam boilers specially adapted for nuclear steam generators, e.g. maintenance, repairing or inspecting equipment not otherwise provided for
- F22B37/007—Installation or removal of nuclear steam generators
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F22—STEAM GENERATION
- F22B—METHODS OF STEAM GENERATION; STEAM BOILERS
- F22B37/00—Component parts or details of steam boilers
- F22B37/02—Component parts or details of steam boilers applicable to more than one kind or type of steam boiler
- F22B37/58—Removing tubes from headers or drums; Extracting tools
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
- F28D7/00—Heat-exchange apparatus having stationary tubular conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall
- F28D7/06—Heat-exchange apparatus having stationary tubular conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall the conduits having a single U-bend
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
- F28F9/00—Casings; Header boxes; Auxiliary supports for elements; Auxiliary members within casings
- F28F9/02—Header boxes; End plates
- F28F9/04—Arrangements for sealing elements into header boxes or end plates
- F28F9/16—Arrangements for sealing elements into header boxes or end plates by permanent joints, e.g. by rolling
- F28F9/18—Arrangements for sealing elements into header boxes or end plates by permanent joints, e.g. by rolling by welding
- F28F9/182—Arrangements for sealing elements into header boxes or end plates by permanent joints, e.g. by rolling by welding the heat-exchange conduits having ends with a particular shape, e.g. deformed; the heat-exchange conduits or end plates having supplementary joining means, e.g. abutments
-
- G—PHYSICS
- G21—NUCLEAR PHYSICS; NUCLEAR ENGINEERING
- G21D—NUCLEAR POWER PLANT
- G21D1/00—Details of nuclear power plant
- G21D1/003—Nuclear facilities decommissioning arrangements
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23P—METAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
- B23P11/00—Connecting or disconnecting metal parts or objects by metal-working techniques not otherwise provided for
- B23P11/02—Connecting or disconnecting metal parts or objects by metal-working techniques not otherwise provided for by first expanding and then shrinking or vice versa, e.g. by using pressure fluids; by making force fits
- B23P11/025—Connecting or disconnecting metal parts or objects by metal-working techniques not otherwise provided for by first expanding and then shrinking or vice versa, e.g. by using pressure fluids; by making force fits by using heat or cold
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F22—STEAM GENERATION
- F22B—METHODS OF STEAM GENERATION; STEAM BOILERS
- F22B1/00—Methods of steam generation characterised by form of heating method
- F22B1/02—Methods of steam generation characterised by form of heating method by exploitation of the heat content of hot heat carriers
- F22B1/023—Methods of steam generation characterised by form of heating method by exploitation of the heat content of hot heat carriers with heating tubes, for nuclear reactors as far as they are not classified, according to a specified heating fluid, in another group
- F22B1/025—Methods of steam generation characterised by form of heating method by exploitation of the heat content of hot heat carriers with heating tubes, for nuclear reactors as far as they are not classified, according to a specified heating fluid, in another group with vertical U shaped tubes carried on a horizontal tube sheet
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
- F28D21/00—Heat-exchange apparatus not covered by any of the groups F28D1/00 - F28D20/00
- F28D2021/0019—Other heat exchangers for particular applications; Heat exchange systems not otherwise provided for
- F28D2021/0054—Other heat exchangers for particular applications; Heat exchange systems not otherwise provided for for nuclear applications
-
- 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
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Thermal Sciences (AREA)
- High Energy & Nuclear Physics (AREA)
- Plasma & Fusion (AREA)
- Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
- Monitoring And Testing Of Nuclear Reactors (AREA)
- Processing Of Solid Wastes (AREA)
- Automatic Assembly (AREA)
Abstract
Description
また、前記分解対象物を得るステップでは、前記管板を挟んで前記一次領域側で前記伝熱管及び前記管板の端面が面一となるように前記端面を切断してもよい。
図1に示すように、蒸気発生器10は、胴部11と、水室17と、管板12と、複数の伝熱管13と、仕切16を備える。胴部11は、軸方向Dに延びる筒状をなしている。水室17は胴部11の下方に設けられている。管板12は、胴部11と水室17の間に配置されている。管板12は、軸方向Dに直交する面(例えば、水平面)に沿って配置されている。管板12は、胴部11と水室17を仕切っている。これにより蒸気発生器10には、管板12よりも下側の一次冷却水室14(一次領域)と、管板12よりも上側の二次冷却水室15(二次領域)と、が形成される。仕切16は、一次冷却水室14を入口側水室14aと、出口側水室14bとに区画している。ここで、管板12に対して軸方向Dの一方側を一次側、管板12に対して軸方向Dの他方側を二次側と呼ぶ。
次いで、蒸気発生器10の分解方法について図2、及び図4~図6を参照して説明する。図2に示すように、本実施形態に係る蒸気発生器10の分解方法は、分解対象物形成ステップS1と、伝熱管特定ステップS2と、固着解除ステップS3と、伝熱管引き抜きステップS4と、を含む。
上記方法によれば、TIG加熱ヘッド90によって加熱することで伝熱管13と管板12との固着が解除され、伝熱管13を管板12から容易に引き抜くことができる。さらに、管板12から伝熱管13が突出している二次側ではなく、管板12と伝熱管13とが重なっている一次側からTIG加熱ヘッドを挿入する。これにより、伝熱管13のみが加熱されてしまうことによる当該伝熱管13の損壊を抑制することができる。したがって、伝熱管13と管板12とをより円滑に分離することが可能となる。
以上、本開示の実施形態について図面を参照して詳述したが、具体的な構成や方法はこの実施の形態に限られるものではなく、本開示の要旨を逸脱しない範囲の設計変更等も含まれる。
各実施形態に記載の蒸気発生器の分解方法は、例えば以下のように把握される。
11…胴部
12…管板
12f…第二面
12g…第一面
13…伝熱管
13b…端部
13s…直管部
13t…湾曲部
14…一次冷却水室
14a…入口側水室
14b…出口側水室
15…二次冷却水室
16…仕切
18…貫通孔
18i…内壁面
20…溶接部
90 TIG加熱ヘッド
131 突出部
Claims (5)
- 胴部と、
水室と、
前記胴部と前記水室との間に設けられ、前記水室側の一次領域と前記胴部側の二次領域とに区画するとともに、厚さ方向に貫通する複数の貫通孔が形成された管板と、
前記複数の貫通孔に挿入されている複数の伝熱管と、
を備える蒸気発生器の分解方法であって、
前記管板を挟んで前記一次領域側で前記伝熱管及び前記管板の端面を切断するとともに、前記二次領域側で前記伝熱管が前記管板から突出するように切断することで、前記管板と前記伝熱管の一部とを含む分解対象物を得るステップと、
前記分解対象物に含まれる前記伝熱管のうち、前記管板に固着している前記伝熱管を特定するステップと、
前記管板に固着している前記伝熱管の一部に、TIG加熱ヘッドを挿入して前記伝熱管を加熱することで該伝熱管の一部と前記管板の固着を解除するステップと、
前記伝熱管の一部を前記貫通孔から引き抜くステップと、
を含み、
前記固着を解除するステップでは、前記一次領域側から前記TIG加熱ヘッドを挿入し、
前記固着を解除するステップでは、前記TIG加熱ヘッドを、前記伝熱管の一部の内部で長手方向に沿って前記一次領域側から二次領域側に向かう方向のみに、複数の線条に移動させる蒸気発生器の分解方法。 - 前記分解対象物を得るステップでは、前記管板を挟んで前記一次領域側で前記伝熱管及び前記管板の端面が面一となるように前記端面を切断する請求項1に記載の蒸気発生器の分解方法。
- 前記貫通孔から引き抜くステップでは、前記二次領域側から前記伝熱管の一部を引き抜く請求項1又は2に記載の蒸気発生器の分解方法。
- 前記固着している前記伝熱管を特定するステップでは、前記伝熱管の管理情報及び目視確認に基づいて、引き抜きの対象となる前記伝熱管を特定する請求項1から3のいずれか一項に記載の蒸気発生器の分解方法。
- 前記固着を解除するステップでは、前記伝熱管が0.5~1.5%収縮するまで加熱を行う請求項1から4のいずれか一項に記載の蒸気発生器の分解方法。
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2021159780A JP7015407B1 (ja) | 2021-09-29 | 2021-09-29 | 蒸気発生器の分解方法 |
US17/925,754 US11835226B2 (en) | 2021-09-29 | 2022-04-26 | Method of disassembling steam generator |
PCT/JP2022/018888 WO2023053555A1 (ja) | 2021-09-29 | 2022-04-26 | 蒸気発生器の分解方法 |
EP22800992.4A EP4180170A4 (en) | 2021-09-29 | 2022-04-26 | METHOD FOR DISASSEMBLY A STEAM GENERATOR |
Applications Claiming Priority (1)
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JP2021159780A JP7015407B1 (ja) | 2021-09-29 | 2021-09-29 | 蒸気発生器の分解方法 |
Publications (2)
Publication Number | Publication Date |
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JP7015407B1 true JP7015407B1 (ja) | 2022-02-02 |
JP2023049806A JP2023049806A (ja) | 2023-04-10 |
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JP2021159780A Active JP7015407B1 (ja) | 2021-09-29 | 2021-09-29 | 蒸気発生器の分解方法 |
Country Status (4)
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---|---|
US (1) | US11835226B2 (ja) |
EP (1) | EP4180170A4 (ja) |
JP (1) | JP7015407B1 (ja) |
WO (1) | WO2023053555A1 (ja) |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5412002A (en) * | 1977-06-24 | 1979-01-29 | Westinghouse Electric Corp | Method of and device for removing internal structure from shell of steam generator |
JPS5592801A (en) * | 1978-12-28 | 1980-07-14 | Westinghouse Electric Corp | Tube exchanging method of steam generater |
JPH0718531B2 (ja) * | 1985-03-20 | 1995-03-06 | 北海道電力株式会社 | 伝熱管の除去方法 |
Family Cites Families (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4406856A (en) * | 1980-09-29 | 1983-09-27 | Westinghouse Electric Corp. | Removal of portions of tubes from steam generator of nuclear reactor |
JP2003251536A (ja) * | 2002-02-27 | 2003-09-09 | Mitsubishi Heavy Ind Ltd | チューブを引き抜く装置と方法 |
JP2004069107A (ja) * | 2002-08-02 | 2004-03-04 | Babcock Hitachi Kk | 熱交換器の伝熱管抜管装置 |
JP4357461B2 (ja) * | 2005-06-27 | 2009-11-04 | 原子燃料工業株式会社 | 沸騰水型原子炉用燃料集合体の角管検査装置 |
JP2012189247A (ja) | 2011-03-09 | 2012-10-04 | Mitsubishi Heavy Ind Ltd | 伝熱管の削除方法 |
JP2021159780A (ja) | 2020-03-30 | 2021-10-11 | ニッコー株式会社 | 排水処理装置 |
-
2021
- 2021-09-29 JP JP2021159780A patent/JP7015407B1/ja active Active
-
2022
- 2022-04-26 WO PCT/JP2022/018888 patent/WO2023053555A1/ja unknown
- 2022-04-26 EP EP22800992.4A patent/EP4180170A4/en active Pending
- 2022-04-26 US US17/925,754 patent/US11835226B2/en active Active
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5412002A (en) * | 1977-06-24 | 1979-01-29 | Westinghouse Electric Corp | Method of and device for removing internal structure from shell of steam generator |
US4173060A (en) * | 1977-06-24 | 1979-11-06 | Westinghouse Electric Corp. | System and method for retubing a steam generator |
JPS5592801A (en) * | 1978-12-28 | 1980-07-14 | Westinghouse Electric Corp | Tube exchanging method of steam generater |
US4270258A (en) * | 1978-12-28 | 1981-06-02 | Westinghouse Electric Corp. | Method of retubing a steam generator |
JPH0718531B2 (ja) * | 1985-03-20 | 1995-03-06 | 北海道電力株式会社 | 伝熱管の除去方法 |
Also Published As
Publication number | Publication date |
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WO2023053555A1 (ja) | 2023-04-06 |
JP2023049806A (ja) | 2023-04-10 |
EP4180170A1 (en) | 2023-05-17 |
US11835226B2 (en) | 2023-12-05 |
US20230213180A1 (en) | 2023-07-06 |
EP4180170A4 (en) | 2024-03-06 |
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