Weir Valves & Controls USA Inc. World Leader in Design, Manufacture and Service Support for BWR and PWR MSIV s

Transcription

1 Atwood & Morrill Main Steam Isolation Valves Weir Valves & Controls USA Inc. 1 World Leader in Design, Manufacture and Service Support for BWR and PWR MSIV s

2 2 Capabilities in Nuclear Power Generation Involved in Government and Commercial Nuclear Power for over 50 yrs Manufactured key safety related valves installed at Shippingport Supplied valves for the first US Naval Nuclear Reactors Supplied valves to most PWR and BWR sites in the U.S. Key Valve supplier in European and Asian Nuclear Reactors UK, France, China, Korea, Japan Industry renowned brands, each with a reputation for quality An extensive global installed base of nuclear valve products Growing an impressive base on the Gen III+ reactor design Actively working with SMR and Gen IV manufacturers for future valve requirements

3 Atwood & Morrill Main Steam Isolation Valves Weir Valves & Controls USA Inc. 3 The Main Steam Isolation Valve is a quick closing design for high pressure steam service. The Main Steam Isolation Valve is normally held open by air pressure applied to the air actuating cylinder, spring closing on failure of air supply. An oil dashpot with adjustable metering valves controls the closing speed for BWR applications. It is a wye pattern type valve complete with actuator and accessory equipment. The valve is actuated with an air cylinder operator (air to open, air and/or spring to close).

4 Atwood & Morrill Main Steam Isolation Valves Weir Valves & Controls USA Inc. 4 HISTORY & DESIGN MSIV s are designed to close quickly and seal tightly on the main steam line coming off the reactor vessel (BWR) and main steam line of the steam generator on (PWR). The designs are different between a Boiler Water Reactor (BWR) and a Pressure Water Reactor (PWR) The valve is designed to fail closed within 3 to 5 seconds when tripped.

5 Difference Between BWR & PWR Weir Valves & Controls USA Inc. 5 BWR 45 degree body seat with a degree poppet seat Smaller upper structure with more springs Nose guided poppet Liners Only at Nine Mile Unit 1, Oyster Creek & Tarapur India Seat rings Only at Nine Mile Unit 1, Oyster Creek & Tarapur India Air spring closure LLRT Requirement General 11 scfh original requirement/ per valve Some inboard /outside valves may be rolled up to 30 degrees Dashpot speed controlled PWR Flat poppet and body seat Larger upper structure with less springs Skirt Seals Articulated Pilot Poppet Spring alone closure No LLRT requirement, valve is in secondary system Metered air speed controlled

6 Atwood & Morrill Main Steam Isolation Valves Weir Valves & Controls USA Inc. 6 Design modification features 1. Nose guided poppet (BWR only) 2. Stabilized poppet design (BWR & PWR) 3. Welded floating pilot poppet (BWR & PWR) 4. Anti-rotation main and pilot poppet's (BWR & PWR) 5. Second bushing in the cover (BWR) 6. Live loaded packing with out/leak-off (BWR & PWR) 7. One piece forged anti-rotation stem (BWR & PWR)

7 Current Modification for Plant Hatch Unit II Weir Valves & Controls USA Inc. 7 Original installation of (8) Rockwell Edwards 24 MSIV s, Drawing # PD Rev. R on Unit II Weir installed Weir/A&M internals into Unit II Experience from Unit I A&M valves led to major factor in modifying to A&M design in Unit II We have modified six valves total to date with the remaining two scheduled for Spring 2017 Modification includes Poppet stabilization, Nose Guided Poppet and One Piece Stem LLRT results from six modified MSIV s: Valve Year Modified As left LLRT Result (SCFH) Year of Next LLRT As Found Result (SCFH) Inboard 22C Outboard 28A * Inboard 22A Inboard 22B Outboard 28B Outboard 28D * This number was with a control panel leak and actual seat tightness could not be verified.

8 A&M Retrofit Modification Process for Plant Hatch Unit II Weir Valves & Controls USA Inc. 8 Weir Engineering Perform Equivalency / Reconciliation of Rockwell Edwards 24 MSIV s Design Evaluate Existing MSIV Internal Mapping Data Reverse Engineer Rockwell Edwards Spare Parts Perform Plant Walk Downs for MSIV Locations Evaluate Existing Upper Structure for Reuse (Actuator / Spring Plates / Springs / Yoke Rods) Poppet / Main Disc & Bonnet / Cover are manufactured oversize to machine fit in field.

9 9 Wye Pattern MSIV Globe Valve Design Benefits Excellent repeatable LLRT results Adjustable 3 5 seconds closure time Lower pressure drop Price competitive versus MSIV Gate Low center of gravity Weir has largest BWR installed base with operational history Design Enhancements Nose guided poppet Cover back seated poppet Welded floating pilot poppet Anti rotation main and pilot poppets Second bushing in the cover Live loaded packing w/o leak off One piece forged anti rotation stem

10 Turnkey Experience List Weir Valves & Controls USA Inc. 10 The Weir Valves Service Crew has performed (140) MSIV Modification s and Maintenance activities since 2002 at the following Power Plant locations: TVA Watts Bar Unit 1 & 2, Installed poppet stabilization mod, refurbish air cylinders & air panels every 5 years, (8 MSIV's) and performed General Valve Maintenance. TVA Sequoyah Unit 1 & 2, Installed one piece stem mod, refurbish air cylinders & air panels every 5 years, (8 MSIV's) and performed General Valve Maintenance. TVA Browns Ferry Unit 1, 2 & 3 Power Up rate, Installed mod to increased valve stroke by 4 inches for 20 % power up rate, installed nose guide and stabilized poppet's, (24 MSIV's) and performed LLRT & General Valve Maintenance. Duke Power McGuire, Installed poppet stabilization mod, weld guide ribs as necessary, refurbish air cylinders every 5 years, (8 MSIV's) and performed General Valve Maintenance. Duke Power Catawba, Installed poppet stabilization mod, weld guide ribs as necessary, refurbish air cylinders every 5 years, (8 MSIV's) and performed General Valve Maintenance. SCANA VC Summer, MSIV outage maintenance, refurbish valve internals & rebuild air cylinder. (2 MSIV) (1) MSIV Modification Southern Nuclear Plant Hatch, Installed poppet stabilization mod, refurbish valve internals. (6 MSIV's) (2) MSIV Modifications Southern Nuclear Plant Farley, Installed MSIV actuator mod, Internal valve inspections. (6 MSIV's) (6) MSIV Modifications First Energy Beaver Valley, Installed poppet stabilization mod. (8 MSIV's) First Energy Perry, Installed poppet stabilization mod. (8 MSIV's) South Texas Project, Stem Modification, refurbish valve internals. (8 MSIV's) Exelon Oyster Creek, Installed poppet stabilization mod, refurbish valve internals. (4 MSIV's) Exelon Limerick, Installed poppet stabilization mod. (16 MSIV's) Susquehanna, MSIV LLRT Failures, (4 MSIV s) Brunswick, MSIV Stem Replacements, (4 MSIV s) Nine Mile 2, MSIV LLRT Failures, (2 MSIV s)

11 Turnkey Experience List Recent (4) year MSIV work history: Weir Valves & Controls USA Inc Hatch Unit 1, (2) A&M MSIV Modifications, (8) MSIV P.M. s, February 2016 Brunswick, (4) MSIV rebuilds, (2) Actuator rebuilds, (8) MSIV P.M. s, March 2016 Browns Ferry Unit 3, (1) MSIV LLRT Failures, (4) Actuator Rebuilds, (8) PM s, March 2016 Susquehanna, (1) MSIV LLRT Failure, (2) MSIV Actuator Replacements, (8) MSIV P.M. s March 2016 McGuire, (1) MSIV rebuild, (1) MSIV Actuator Replacement, (4) MSIV P.M. s April 2016 Farley, (3) MSIV rebuilds, (3) MSIV Actuator Replacements, (5) Check Valves April 2016 Nine Mile,(2) MSIV LLRT Failures, (2) Actuator Replacements, (4) MSIV P.M. s, April 2016 Catawba, (1) MSIV weld repair, (4) MSIV P.M. s, September 2016 Farley, (3) MSIV rebuilds, (3) MSIV Actuator Replacements,(October 2016 Browns Ferry Unit 3, (1) MSIV LLRT Failures, (4) Actuator Rebuilds, (8) P.M. s, October 2016 Sequoyah, (5) Main Steam Safety Valve Replacements November Hatch Unit 2, (4) Rockwell MSIV Modifications, (8) MSIV P.M. s, February 2015 Catawba, (3) MSIV rebuilds, (2) Actuator rebuilds, (4) MSIV P.M. s, March 2015 Browns Ferry Unit 1, (2) MSIV LLRT Failures, (2) Actuator Rebuilds, (8) P.M. s, March 2015 Perry, (5) MSIV Actuator Replacements, (8) MSIV P.M. s, March 2015 Nine Mile, (2) RWCU Check Valve Repairs, March 2015 Sequoyah, (5) Anchor Darling Double Disc Valve Repairs, (5) Main Steam Safety Valve Replacements, April 2015 Susquehanna, (4) MSIV Actuator Replacements, (8) MSIV P.M. s, April 2015 Pilgrim, (1) MSIV LLRT Failure, (2) MSIV Actuator Rebuilds, (8) MSIV P.M. s, April 2015 Watts Bar, (1) MSIV Actuator / Control Panel Rebuild, (5) Drop & Swap Safety Valves, (9) Check Valves, Sept 2015 VC Summer,(1) MSIV Modification, (1) Actuator rebuild, (4) MSIV P.M. s, October 2015 Sequoyah, (6) Anchor Darling Double Disc Valve Repairs, (5) Main Steam Safety Valve Replacements, Nov 2015 Catawba, (2) MSIV rebuilds, (2) Actuator rebuilds, (4) MSIV P.M. s, November 2015

12 Turnkey Experience List Weir Valves & Controls USA Inc. 12 Recent (4) year MSIV work history: 2014 Browns Ferry, MSIV Actuator rebuilds, February 2014 Hatch Unit 1, (8) MSIV P.M. s, February 2014 McGuire, (4) MSIV P.M. s, March 2014 Susquehanna, (2) MSIV LLRT failures, (8) MSIV P.M. s, April 2014 Watts Bar Unit 1, (1) MSIV Actuator & Control Panel rebuild, April 2014 Catawba, (2) MSIV rebuilds, (2) Actuator rebuilds, (4) MSIV P.M. s, May 2014 Fitzpatrick, (1) MSIV LLRT failure, September 2014 McGuire, (1) MSIV rebuild, (5) 18 Pacific valve repairs, September 2014 Browns Ferry, (1) MSIV LLRT failure, (1) Actuator rebuild, (8) PM s, October Browns Ferry, MSIV Actuator rebuilds, February 2013 Hatch Unit 2, (3) Rockwell MSIV LLRT failures, (8) MSIV P.M. s, February 2013 River Bend, (1) MSIV LLRT failure, (8) MSIV P.M. s, February 2013 McGuire, (4) MSIV P.M. s, March 2013 Perry, (1) MSIV LLRT failure, (8) MSIV P.M. s, March 2013 *Susquehanna, (8) MSIV P.M. s, April 2013 worked performed by CVS as Subcontractor to CFS Nine Mile, (1) MSIV LLRT failure, (8) MSIV P.M. s, April 2013 Watts Bar Unit 1, (1) MSIV Actuator & Control Panel rebuild, June 2013 Catawba, (2) MSIV rebuilds, (2) Actuator rebuilds, (4) MSIV P.M. s, September 2013 Sequoyah, (4) MSIV P.M. s, October 2013 Catawba, (2) MSIV rebuilds, (2) Actuator rebuilds, (4) MSIV P.M. s, November 2015

13 13 MSIV Enhancements Cover Backseated Poppet Nose Guided Poppet

14 14 Ask us about MSIV Field Maintenance Capabilities Measurements are taken to verify that the boring bar is in the proper orientation on the center line

15 15 Ask us about MSIV Field Maintenance Capabilities Boring bar set up

16 16 Ask us about MSIV Field Maintenance Capabilities MSIV Tooling Rib Repair

17 17 Ask us about MSIV Field Maintenance Capabilities MSIV Automatic Welding Machine

18 18 Manufacturing photos of first generation A&M MSIVs from the late 1960 s/early 1970 s

19 19 Summary Slide 1 - Atwood & Morrill Main Steam Isolation Valves WVC USA is the World Leader in design, manufacture and service support for BWR and PWR MSIV s Ask us about our extensive Experience List

20 20 Summary Slide 2 - Atwood & Morrill Turnkey Services Extend the life of your valves Drop & Swaps Machining and Welding Pre-outage Package Reviews Field Technical Support Home Office Engineering & Technical Support

21 21 Turnkey Field Services Field Crew to support MSIV, Testable Checks, Feedwater Checks and Extraction Checks All Crews are supported with A&M design documents, drawings and manufacturing engineering support Drop & Swaps Machining and Welding to support refurbishment, as well as equipment upgrade Pre Outage Work Package Reviews Field Technical Support Home Office Engineering & Technical Support EXTEND THE LIFE OF YOUR VALVES WITH OUR TURNKEY SERVICES