TW425576B - Top mount canopy seal clamp assembly - Google Patents
Top mount canopy seal clamp assembly Download PDFInfo
- Publication number
- TW425576B TW425576B TW087113587A TW87113587A TW425576B TW 425576 B TW425576 B TW 425576B TW 087113587 A TW087113587 A TW 087113587A TW 87113587 A TW87113587 A TW 87113587A TW 425576 B TW425576 B TW 425576B
- Authority
- TW
- Taiwan
- Prior art keywords
- seal
- cover
- weld
- top plate
- ring
- Prior art date
Links
Classifications
-
- G—PHYSICS
- G21—NUCLEAR PHYSICS; NUCLEAR ENGINEERING
- G21C—NUCLEAR REACTORS
- G21C13/00—Pressure vessels; Containment vessels; Containment in general
- G21C13/02—Details
- G21C13/032—Joints between tubes and vessel walls, e.g. taking into account thermal stresses
- G21C13/036—Joints between tubes and vessel walls, e.g. taking into account thermal stresses the tube passing through the vessel wall, i.e. continuing on both sides of the wall
-
- 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
Landscapes
- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Plasma & Fusion (AREA)
- General Engineering & Computer Science (AREA)
- High Energy & Nuclear Physics (AREA)
- Monitoring And Testing Of Nuclear Reactors (AREA)
- Pressure Vessels And Lids Thereof (AREA)
- Gasket Seals (AREA)
- Flanged Joints, Insulating Joints, And Other Joints (AREA)
- Butt Welding And Welding Of Specific Article (AREA)
Description
經濟部中央橾準局員工消費合作杜印製 425576 A7 ____—__B7 五、發明説明(1 ) 相關申請案之相互耒者女_ 本申請案之主題係揭露在本案申請人於1997年9月29 曰申请,而暫時審查中之美國專利申請案第6〇/〇57,318號 中’並以該案提出優先權。 發明背景 1.發明領域 本發明係關於一種核子能量反應器’而詳言之t係關於 一種用以在核子反應容器頭部密封滲漏之焊接穿孔之方法 及裝置。 在一典型之壓水式核子反應器中,複數個控制桿驅動機 構(CRDM)係安裝在容器之頭部。此機構係位在壓力邊界 外殼,且提供中子吸收控制桿之控制動作。組成外殼之零 件係以歐米伽(omega)密封熔接而彼此組合並結合在一起。 在反應容器頭部CRDM噴嘴以及配合零件(參照圖丨)之 間,係具有一種罩蓋式密封歐米伽(〇mega)溶接。此一溶接 係會因為應力侵蝕破裂而有形成裂缝之傾向。這些裂缝通 常係會藉由熔接而衍生,直到產生滲漏為止β 使反應谷器頭部噴嘴位在每一潛在之控制桿位置上,其 一種常見之設計。大部分之噴嘴係用以控制桿體,而少數 之噴嘴則係用於核心退出電熱偶裝置,而其他數個噴嘴(備 用)則係加以封蓋住。 2·先前技術之說明 罩蓋密封这接之滲漏維修係相當花費人力及時間的因 為其必須在有限範圍内之高度輻射性區域中進行β通常, -4- 本紙張尺料财卿家辟(CNS丨Μ規格(2lQx 297公赛) --- ---------叫裝-- {請先閱讀背面之注意事項再填寫本f ) IT· 425576 A7 B7 - ........ T-- I __ ^―—- 五、發明説明(2 ) 歐米伽(omega)密封參漏之維修係藉由關閉工麻,將反應器 冷媒抽取出來’而使其高度位在反應容器頭部以下,且以 疊置方式施加一熔接物於滲漏之部位。此一方法需用去相 當多之時間’且由於相當靠近且接觸反應容器頭部,因此 會使工人受到相當大之輻射劑量,且其與先前存在之熔接 並無不同之處’也就是說’在此相同部位上,其仍有可能 再次產生滲漏° 發明摘要 本發明之一目的係要提供一種頂部裝設之罩蓋式密封機 構夾持組合件(TM-CSCA),以做為一種防止在罩蓋式密封 嫁接處參漏之非豫接式結構方法及裝置。此T Μ - C S C A係 可治、封渗漏之’溶接處’且可導入一塵_縮負載至罩蓋式密封 件上,其可封住且阻止裂縫之形成。此TM-CSCA係藉由 將一葛拉弗里(Grafoil)密封件壓縮在整個環狀密封熔接區域 上,而密封住滲漏之熔接處。 此頂部裝設之罩蓋式密封夹持組合件係具有三個超越嫁 接修補方式之主要優點,其中其可以節省時間 '降低放射 線劑量,以及降低滲漏之再發生率。 經濟部中央標隼局負工消費合作社印裝 TM-CSCA超越熔接修補方式之另一優點,係在於其可以 不需要"洩放(draindown)”反應器冷媒系統而完成安裝3這 係一個重大之優點,因為大部分之滲漏係在停工之後,^ 廠重新運轉之期間而發現,為了有較好之熔接修補’其係 需要沒有任何水(或水氣)餘留在噴嘴中。因此,由於在修 補時不需要加以"洩放",因此便可節省時間。 本紙張尺度適用中國國家標準(CNS ) A4規格(21〇χ297公釐) -,25576" A7 B7 五'發明説明(3 ) 此TM-CSCA亦可降低輻射劑量。熔接修補係需要一组 工作人員在相當靠近反應容器頭部喷嘴處(高輻射劑量 區),進行一段相當長之時間。TM-CSCA則係由反應容器 頭部之上方(較低之輻射劑量區)以長柄工具懸空安裝3因 此’此TM-CSCA工作人員所受到之韓射劑量,係比從事 熔接修補之工作人員還要少得多。 由TM-CSCA所修補過之喷嘴,其再產生滲漏之可能 性’係遠小於藉由熔接修補過之喷嘴。這係因為tm_csca 係施加一壓縮負載至罩蓋式密封件上,其係傾向於封住且 防止破裂之產生。而熔接修補則與先前存在之熔接處並無 不同之處=因此’ TM-CSCA修補滲漏,且防止進一步滲漏 之產生。 TM-CSCA係以特殊設計之長柄工具,而由反應容器頭部 之上方(約距離噴嘴2 0英呎處),遠距地安裝。外殼係降低 至欲修補之嘴嘴上方,而位在穿透處或嘴嘴石緣之下方。 第一支撐半體係下降,且置入外殼中;接著第二支撐半體 亦以相同之方式安裝於其中。葛拉弗里(Graf〇il)密封環圈以 及密封支撐環圈接著係下降至欲進行修補之罩蓋式密封件 上。然後,頂板亦下降’以將葛拉弗里(Graf〇il)密封環圈壓 縮至定位。接著’安裝具有貝勒維爾(Belleville),圈之頂 蓋螺絲件’以提供所需要之固持負載力。 圖式簡輩說明 圖1係環狀罩蓋式密封熔接處之截面概要侧視圈,其中 該溶接處係位在控制桿驅動機構(CRDM)噴嘴以及配合零 -6 - 本紙張尺度適用中國國家糅隼(CNS ) A4& ( 210 X 297公* )---
If |1€ m _ (讀先聞讀背面之注意事項再填寫本頁) ^裝------訂-----'-線 超濟部中央樣率扃負工消费合作杜印裝
Claims (1)
- 經濟部中央標芈局負工消費合作社印製 4 25576 Λ8 B8 六、申請專利範圍 ' --- 1. -種頂邵裝設之罩蓋式密封機構夹持组合件,其係用以 修補=嘴之渗漏的罩蓋式密封熔接處,其包含: 衣狀中工外殼’其具有—指向為徑向朝内之凸緣, 此凸緣之尺寸係可使其伸縮式地通過該具有罩蓋式密封 熔接處之噴嘴凸緣; 半圓裒狀且與具有一 3袁狀肩部之環狀中空外殼同心之 插入式支撑半體,其係'用以與環狀中空外殼凸緣之袖向 面部朝内之表面,以面部相對之方式緊密銜接在一起; 一環狀中空頂板; Μ頂板係與環狀中空外殼同心’且係包圍喷嘴; 一密封件座部係位在頂板上,其係在罩蓋式密封熔接 處足上万且徑向朝外,於其中安裝有一葛拉弗里(Graf〇⑴ 環圈,用以與該罩蓋式密封件銜接; 頂蓋螺絲,其係用以將頂板及外殼一起柚出; 藉此’罩蓋式密封件便可產生一壓縮力至葛拉弗里 (Grafoil)密封件上,且抵頂該罩蓋式密封熔接處,以在 溶接處產生一葛拉弗里(Grafoil)式防漏密封。 2. 根據申請專利範圍第1項之夾持組合件,其中頂蓋螺絲 在其頭部及頂板之間’係提供有貝勒維爾(BeUeville)墊 圈,以提供並維持所需要之固持負載力, -10- 本紙悵尺度逋用中國國家標隼(CNS ) A4*見格(210X297公煃) {請先聞讀背面之注意事項再填寫本頁) 訂
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US5731897P | 1997-09-29 | 1997-09-29 | |
US09/070,846 US6111928A (en) | 1997-09-29 | 1998-04-28 | Top mount canopy seal clamp assembly |
Publications (1)
Publication Number | Publication Date |
---|---|
TW425576B true TW425576B (en) | 2001-03-11 |
Family
ID=22009859
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
TW087113587A TW425576B (en) | 1997-09-29 | 1998-08-18 | Top mount canopy seal clamp assembly |
Country Status (7)
Country | Link |
---|---|
US (1) | US6111928A (zh) |
EP (1) | EP1019916B1 (zh) |
JP (1) | JP3584311B2 (zh) |
KR (1) | KR100364593B1 (zh) |
AU (1) | AU9477198A (zh) |
TW (1) | TW425576B (zh) |
WO (1) | WO1999017301A1 (zh) |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6888908B1 (en) * | 2002-11-18 | 2005-05-03 | Babcock & Wilcox Canada, Ltd. | Reactor head with integral nozzles |
DE102004025585B4 (de) * | 2004-05-25 | 2013-01-03 | Westinghouse Electric Germany Gmbh | Reaktordruckbehälterdeckel für einen Siedewasserreaktor |
US7802825B2 (en) * | 2007-11-15 | 2010-09-28 | Ge-Hitachi Nuclear Energy Americas | Method and system for repairing a downcomer pipe in a core spray for a nuclear reactor |
Family Cites Families (21)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CH479015A (de) * | 1968-07-30 | 1969-09-30 | Smith Blair Inc | Abdichtungsklampe für eine Muffenrohrverbindung |
US3926722A (en) * | 1973-06-29 | 1975-12-16 | Combustion Eng | Reactor vessel head support arrangement |
DE2614426A1 (de) * | 1976-04-03 | 1977-10-06 | Juergens Walter | Kanalverbindung |
US4240650A (en) * | 1978-05-26 | 1980-12-23 | Adams Harold R | Leaking weld repair clamp |
US4480841A (en) * | 1982-10-13 | 1984-11-06 | Combustion Engineering, Inc. | Apparatus and method for sealing a tube joint |
US4655483A (en) * | 1984-05-14 | 1987-04-07 | Combustion Engineering, Inc. | Boundary seal for vessel penetration |
US4611813A (en) * | 1984-09-28 | 1986-09-16 | Combustion Engineering Co., Inc. | Method of and apparatus for providing an annular seal |
US4709729A (en) * | 1984-10-03 | 1987-12-01 | Team, Inc. | Pipe weld repair device and method for the installation thereof |
US4834935A (en) * | 1984-12-24 | 1989-05-30 | Combustion Engineering, Inc. | Feedwater sparger assembly |
US4826217A (en) * | 1986-03-31 | 1989-05-02 | Combustion Engineering, Inc. | Apparatus and method for sealing a tube joint |
US4676573A (en) * | 1986-04-04 | 1987-06-30 | Combustion Engineering, Inc. | Clamp for hermetic cable connector |
US4723795A (en) * | 1986-05-05 | 1988-02-09 | Combustion Engineering, Inc. | Instrument penetration for high pressure vessels |
SE457029B (sv) * | 1987-03-30 | 1988-11-21 | Asea Atom Ab | Taetningsanordning vid kaernkraftreaktor |
US5377235A (en) * | 1989-07-07 | 1994-12-27 | Westinghouse Electric Corporation | Control rod canopy seal positioning and welding system |
US5316319A (en) * | 1992-09-22 | 1994-05-31 | Rm Engineered Products, Inc. | Liveload assembly for maintaining torque on bolts |
US5513227A (en) * | 1992-12-31 | 1996-04-30 | Combustion Engineering Inc. | Readily disconnectable nozzle arrangement for use with a nuclear reactor |
US5323428A (en) * | 1992-12-31 | 1994-06-21 | Combustion Engineering, Inc. | Readily disconnectable nozzle arrangement for use with nuclear reactor |
US5426676A (en) * | 1993-10-22 | 1995-06-20 | Westinghouse Electric Corporation | Extrusion-resistant seal assembly |
US5631936A (en) * | 1994-03-09 | 1997-05-20 | Combustion Engineering, Inc. | Method and arrangement for compression sealing an omega joint |
US5605361A (en) * | 1994-05-06 | 1997-02-25 | Entergy Operations, Inc. | Replacement nozzle for pressure vessels and method of a attaching same |
US5619546A (en) * | 1995-04-20 | 1997-04-08 | Combustion Engineering, Inc. | Resistance temperature detector nozzle mechanical clamp |
-
1998
- 1998-04-28 US US09/070,846 patent/US6111928A/en not_active Expired - Lifetime
- 1998-08-18 TW TW087113587A patent/TW425576B/zh not_active IP Right Cessation
- 1998-09-08 AU AU94771/98A patent/AU9477198A/en not_active Abandoned
- 1998-09-08 JP JP2000514278A patent/JP3584311B2/ja not_active Expired - Lifetime
- 1998-09-08 KR KR1020007001099A patent/KR100364593B1/ko active IP Right Grant
- 1998-09-08 EP EP98948138A patent/EP1019916B1/en not_active Expired - Lifetime
- 1998-09-08 WO PCT/US1998/018887 patent/WO1999017301A1/en active IP Right Grant
Also Published As
Publication number | Publication date |
---|---|
AU9477198A (en) | 1999-04-23 |
EP1019916B1 (en) | 2009-05-13 |
WO1999017301A1 (en) | 1999-04-08 |
EP1019916A1 (en) | 2000-07-19 |
JP3584311B2 (ja) | 2004-11-04 |
JP2003526075A (ja) | 2003-09-02 |
KR20010022511A (ko) | 2001-03-15 |
US6111928A (en) | 2000-08-29 |
KR100364593B1 (ko) | 2002-12-16 |
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