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Transcript of Feedwater Systems Reliability Users Group (Jan …fsrug.org/Presentations2016/6.pdf · Feedwater...
![Page 1: Feedwater Systems Reliability Users Group (Jan …fsrug.org/Presentations2016/6.pdf · Feedwater Systems Reliability Users Group ... Diablo Canyon: Replacement Base & Installation](https://reader030.fdocuments.in/reader030/viewer/2022020303/5b858da17f8b9a317e8e5876/html5/thumbnails/1.jpg)
FSRUG
Feedwater Systems Reliability Users Group (Jan 2016)
San Antonio, TX
Diablo Canyon: Replacement Base & Installation
Presenter: Art Washburn, P.E.
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FSRUG
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FSRUG
DISCUSSION POINTS• Two Rules to Get You Home and Plant Priorities
• Problem Statement: Condensate Booster Pump (CBP) & Motor Concrete Pad to Foundation Delamination
• Mechanical Performance
• Replacement Base
• Installation of Base, Pump and Motor
• Source References
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FSRUG
Two Rules:
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FSRUG
Two Rules:
Rule #1 – Make Conservative Decisions
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FSRUG
Two Rules:
Rule #1 – Make Conservative Decisions
Rule #2 – Maintain Design Control
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FSRUG
Two Rules:
Rule #1 – Make Conservative Decisions
Rule #2 – Maintain Design Control
Plant Priorities:
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FSRUG
Two Rules:
Rule #1 – Make Conservative Decisions
Rule #2 – Maintain Design Control
Plant Priorities:
1. Nuclear Safety
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FSRUG
Two Rules:
Rule #1 – Make Conservative Decisions
Rule #2 – Maintain Design Control
Plant Priorities:
1. Nuclear Safety
2. Legal Requirements
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FSRUG
Two Rules:
Rule #1 – Make Conservative Decisions
Rule #2 – Maintain Design Control
Plant Priorities:
1. Nuclear Safety
2. Legal Requirements
3. Efficiency
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FSRUG
Problem Statement: CBP & Motor Base
Concrete Pad to Foundation Delamination
• Original Construction - early 1970s (Age > 40 years)
• CBP (Unit 1, Pump 3) developed significant increase in
vibration from 0.1 ips to 0.48 ips
• Primary frequency of vibration increase, 120 Hz or 2X
• Base vibration (0.15 ips), Foundation (<0.03 ips)
• Base had broken bond with the Concrete Pad and Floor
• Personnel could feel the difference in the area: Nibbling
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Pump/Motor Base Delamination from Foundation
FSRUG
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Trend of Motor Vibration – Overall Amplitudes
FSRUG
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Trend of Pump Vibration – Overall Amplitude
FSRUG
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Spectral Waterfall – Motor Outboard Vertical
FSRUG
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Pre-Mainte Spectral Data – Motor Outboard Vertical
FSRUG
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Post-Mainte Spectral Data – Motor Outboard Vertical
FSRUG
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CBP 1-3 Pump,
Motor and Base
FSRUG
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CBP 1-3 Pump, Motor and Base
FSRUG
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CBP 1-3 Pump,
Motor and Base
FSRUG
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CBP 1-3 Pump,
Motor and Base
FSRUG
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CBP 1-3 Motor
Alignment
Bracket
FSRUG
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CBP 1-3 Motor Alignment Bracket
FSRUG
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CBP 1-3 Lube Oil
System Drain Line
FSRUG
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Overhead
Clearance and
Rigging
Limitations
FSRUG
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Original Base Required Removal
FSRUG
- Work Commenced 2 Weeks Prior to Plant Shutdown
- Risk Management Reviews Performed in Support of
Activities
- Tent Installed Around Pump Skid to Contain Dust
- Personnel Donned Mechanical Respirators
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Original Construction Details
FSRUG
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Original Base Required Removal
FSRUG
- Remove components from Base
- Weight: Base (2,400 lbs), Pump (6,000 lbs), Motor (23,000 lbs)
- Motor required Disassembly due to Rigging Limitations
- Wire Saw Cut Base from Foundation
- Base plus Concrete Weight: 9,000 lbs
- Removal of Base Presented Floor Loading Issue
- Base was Saw Cut into 2 Foot Wide Strips and Removed
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Original Base Required Removal
FSRUG
- Anchor Bolt (Studs) were Cut Off During Saw Cutting
- Original Studs Welded to Foundation Steel Inserts; Removed
- Foundation chipped below level and rough to achieve
required anchor profile
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Original Base Drawing – Typical Details for Vintage
FSRUG
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API-686 Recommended Practice for Machinery
Installation and Installation Design
FSRUG
- Replacement Base: Maintain Design Control
- Unless FEA Modeled and Analyzed, Minimize Changes
- If Changes are Desired, Then Evaluate Potential Impact
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Design Changes Implemented
FSRUG
- Original Base is Non-API 610 Design
- Original Base Exhibited Continuous Welds on Exposed
Welds, and Stitch Welds underneath.
- Updated Base Included Continuous Welds. Increased
Stiffness Increased Margin of Separation from Critical
Operating Frequencies.
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Design Changes Implemented - Continued
FSRUG
- Original Base Drawing Fabrication, Machining and
Geometrical Tolerancing Details were lacking.
- Generated new Base Drawing to include Common Sense
Updates, Weld Details and Geometric Tolerances per Latest
Standards
- Grout Holes and Vents: Number and Location was Not
Optimum; Increased Number and Locations to Assure a Well
Grouted Base with Minimum Air Pockets
- Added Leveling Nuts Attached Adjacent to Each Bolt Hole
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Design Changes Implemented - Continued
FSRUG
- Added Lifting Lugs (Quantity, 4).
- Added Driver Alignment Brackets; Site Added in the Field in
the Past; Improved on Design based on Site Requests from
Lessons Learned
- Geometric Tolerancing: Base Flatness in Free State, Pump
Pedestal Feet Profile, Motor Pedestal Feet Profile, Parallelism
Between Pump and Motor Pedestal Feet
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Design Changes Implemented - Continued
FSRUG
- NDT, 100% Welds Visually Inspected per ASW D1.1, Table 6.1
- NDT, Lifting Lug Welds, NDE (MT) Examined. Methodology
per ASME Section V, Article 7; Acceptance Criteria per ASME
Section VIII, Division 1, Appendix 6. Qualification of NDE
Personnel per ASNT Recommended Practice SNT-TC-1A.
- Coating Requirements including Blast Preparation and
Coating Differ Between Topside and Underside of Base. A
unique Underside Coating System Assures Long Term
Reliability of Bond Between Base and Epoxy Grout.
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Updated Base Drawing – Critical Dimensions only
FSRUG
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Replacement Base
FSRUG
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Replacement Base
FSRUG
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Replacement Base
FSRUG
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Installation Details – Civil Engineer’s Perspective
FSRUG
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Replacement Base Installation
FSRUG
- Studs Mounted in New Base Anchor Bolt Holes, Base
Leveled with Pump Bolted to Piping, Studs Welded to Inserts
- Replacement Studs Re-Attached by Welding
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Anchor Stud – Locating and Welding to Steel Floor Inserts
FSRUG
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Retrofit Installation – Not New Construction (Shims Under Pump Feet)
FSRUG
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Installation Details – Civil Engineer’s Perspective
FSRUG
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Base Installation
FSRUG
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Base Set, Grout Forms Installed and Anchored Into Floor
FSRUG
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Pouring Grout
FSRUG
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Grout – Initial Pour Filled to Bottom of Base Rails Plus 1/2 Inch
FSRUG
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Grout Pours Completed, Cured, and Forms Removed
FSRUG
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Vent Holes used for Gout Pour
FSRUG
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Grout Repairs as a Result of Voids Identified
FSRUG
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Grout Repair (Hardener & Resin Less Aggregate) – Injection to Fill Void
FSRUG
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Examples of Grout Pours Requirements
FSRUG
- Ambient Temperature (70 +/- 10 degrees F)
- Critical Pour Time
- Critical Cure Time
- Plus many more requirements (see API-686)
- Grout Pours can be viewed on Youtube
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Pump/Motor Base: Grouting & Grout Repairs
per API-RP686
FSRUG
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Pump/Motor Base: Grout Repair Map
FSRUG
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Mockup Grout Pour – Vertical Pump Soleplate
FSRUG
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Mockup Grout Pour – Plexiglas Soleplate
FSRUG
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Mockup Grout Pour – Plexiglas Soleplate, Grout Flows
FSRUG
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Lessons Learned:• Important Guidance: API 686 - Recommended Practices for
Machinery Installation & Design (Chapters 4 & 5 - Mounting
Plate Installation)
• Plan Required Rigging Needs
• Work Out Union Labor Requirements
• Terms & Conditions
FSRUG
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SOURCE REFERENCES:• Centrifugal Pumps: Design & Application, Lobanoff and Ross
(practical application)
• Centrifugal and Axial Flow Pumps, Stepanoff (theory)
• Centrifugal Pumps, Gülich
• Vertical Turbine, Mixed Flow & Propeller Pumps, Dicmus
• Centrifugal Pump Handbook, Sulzer
• Pump Handbook, Karassik
• Centrifugal Pump Clinic, Karassik
• Centrifugal Pumps Selection & Operation, Karassik
• Centrifugal Pumps, Karassik
• API 686 - Recommended Practices for Machinery Installation
& Design (Chapters 4 & 5 - Mounting Plate Installation)
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Hint
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EBR-1
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THE (HAPPY) END
QUESTIONS ?
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