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| | number = ML13218A021 | | | number = ML13218A021 |
| | issue date = 08/07/2013 | | | issue date = 08/07/2013 |
| | title = Licensee Slides, 08/07/13 Preapplication Meeting with Wolf Creek Nuclear Operating Corporation to Discuss Long-Term Corrective Actions for Water Hammer Events in the Essential Service Water System at Wolf Creek (TAC No. MF2457) | | | title = Licensee Slides, 08/07/13 Preapplication Meeting with Wolf Creek Nuclear Operating Corporation to Discuss Long-Term Corrective Actions for Water Hammer Events in the Essential Service Water System at Wolf Creek |
| | author name = | | | author name = |
| | author affiliation = Wolf Creek Nuclear Operating Corp | | | author affiliation = Wolf Creek Nuclear Operating Corp |
| Line 9: |
Line 9: |
| | docket = 05000482 | | | docket = 05000482 |
| | license number = NPF-042 | | | license number = NPF-042 |
| | contact person = Lyon C F | | | contact person = Lyon C |
| | case reference number = TAC MF2457 | | | case reference number = TAC MF2457 |
| | document type = Meeting Briefing Package/Handouts, Slides and Viewgraphs | | | document type = Meeting Briefing Package/Handouts, Slides and Viewgraphs |
| | page count = 13 | | | page count = 13 |
| | | project = TAC:MF2457 |
| | | stage = Meeting |
| }} | | }} |
| | |
| | =Text= |
| | {{#Wiki_filter:WCNOC-NRC Pre-submittal Meeting Modification to Essential Service Water System August 7, 2013 1 |
| | |
| | Meeting Agenda |
| | * Introduction of the team |
| | * State the objectives of the meeting |
| | * Describe the waterhammer phenomena |
| | * Explain how this modification will address the issue |
| | * Describe the approach to the modification 2 |
| | |
| | Presentation Objective Discuss the Wolf Creek Waterhammer Mitigation Modification 3 |
| | |
| | Project Team |
| | * Rich Clemens Vice President - Strategic Projects |
| | * Russell Bowie ESW Project Director |
| | * Tom Sydnor Water Hammer Mitigation PM |
| | * Kamran Derakhshandegan ESW Project Engineer |
| | * Larry Stevens Licensing Engineer |
| | * Rich Kokesh Sargent & Lundy - Project Manager |
| | * Tony Ryan Sargent & Lundy - Lead Engineer |
| | * Donald Graf MPR Associates - Consultant 4 |
| | |
| | Description of the Total ESW Initiative |
| | * Buried Piping Replacement Project (BPRP) |
| | * Above Ground Replacement Project (AGRP) |
| | * Waterhammer Mitigation Project |
| | * ESW System Inspection and Repair Program 5 |
| | |
| | Description of the Waterhammer Mitigation Modification |
| | * The use of a bypass line around the ESW Pump discharge valve |
| | * The closure of the ESW Pump discharge valve for a fixed time period to force flow through the bypass |
| | * The locking shut of ESW cross-tie valves |
| | * A time-delay relay in-line to ESW Pump discharge valve open signal 6 |
| | |
| | Waterhammer Phenomena |
| | * Present design results in a pressure transient (waterhammer) when ESW flow is initiated upon shutdown of the normal Service Water (SW) system 7 |
| | |
| | System Operation |
| | : 1. Initiating event |
| | : 2. Service water shutdown, system begins to drain down |
| | : 3. EDG start |
| | : 4. Sequencer operation |
| | : 5. Cross-tie valve operation |
| | : 6. Start ESW pumps |
| | : 7. ESW flow in bypass mode |
| | : 8. Main ESW Valves open, full flow of ESW 8 |
| | |
| | Effects of this Modification |
| | : 1. Reduces system column closure effects |
| | : 2. Reduction in pressure pulse |
| | : 3. Reduction in piping loads |
| | : 4. Remains within design specifications 9 |
| | |
| | Analytical Methods Used Computer modeling (vice hand calculation) using the same calculation methods as existing plant license |
| | * Hydraulic network evaluation |
| | * Void closure pressure - Joukowsky Equation 10 |
| | |
| | Conclusion |
| | * The 50.59 process has concluded that prior NRC approval not required |
| | * WCNOC intends to implement the proposed modifications to the ESW by completion of mid-cycle outage during spring of 2014. |
| | 11 |
| | |
| | Schedule for Implementation |
| | * Complete design Oct. 29, 2013 |
| | * Receive valves & materials Jan. 6, 2014 |
| | * Fabrication of sub-assemblies Jan. 17, 2014 |
| | * Start outage Feb. 1, 2014 |
| | * Start-up April 2, 2014 12 |
| | |
| | Any questions or comments? |
| | 13}} |
Letter Sequence Meeting |
|---|
|
|
MONTHYEARML13204A2432013-07-24024 July 2013
Notice of Preapplication Meeting with Wolf Creek Nuclear Operating Corporation to Discuss Long-Term Corrective Actions for Water Hammer Events in the Essential Service Water System at Wolf Creek
Project stage: Meeting
ML13219A1932013-08-0707 August 2013
Licensee Slides (Final), 08/07/13 Preapplication Meeting with Wolf Creek Nuclear Operating Corporation to Discuss Long-Term Corrective Actions for Water Hammer Events in the Essential Service Water System at Wolf Creek
Project stage: Meeting
ML13218A0212013-08-0707 August 2013
Licensee Slides, 08/07/13 Preapplication Meeting with Wolf Creek Nuclear Operating Corporation to Discuss Long-Term Corrective Actions for Water Hammer Events in the Essential Service Water System at Wolf Creek
Project stage: Meeting
ML13221A2132013-08-12012 August 2013
8/7/2013 - Summary of Preapplication Meeting with Wolf Creek Nuclear Operating Corporation to Discuss Long-Term Corrective Actions for Water Hammer Events in the Essential Service Water System at Wolf Creek
Project stage: Meeting
2013-08-12
[Table View] |
|
|---|
Category:Meeting Briefing Package/Handouts
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2023-10-16
[Table view] |
Text
WCNOC-NRC Pre-submittal Meeting Modification to Essential Service Water System August 7, 2013 1
Meeting Agenda
- State the objectives of the meeting
- Describe the waterhammer phenomena
- Explain how this modification will address the issue
- Describe the approach to the modification 2
Presentation Objective Discuss the Wolf Creek Waterhammer Mitigation Modification 3
Project Team
- Rich Clemens Vice President - Strategic Projects
- Russell Bowie ESW Project Director
- Tom Sydnor Water Hammer Mitigation PM
- Kamran Derakhshandegan ESW Project Engineer
- Larry Stevens Licensing Engineer
- Rich Kokesh Sargent & Lundy - Project Manager
- Tony Ryan Sargent & Lundy - Lead Engineer
Description of the Total ESW Initiative
- Buried Piping Replacement Project (BPRP)
- Above Ground Replacement Project (AGRP)
- Waterhammer Mitigation Project
- ESW System Inspection and Repair Program 5
Description of the Waterhammer Mitigation Modification
- The use of a bypass line around the ESW Pump discharge valve
- The closure of the ESW Pump discharge valve for a fixed time period to force flow through the bypass
- The locking shut of ESW cross-tie valves
- A time-delay relay in-line to ESW Pump discharge valve open signal 6
Waterhammer Phenomena
- Present design results in a pressure transient (waterhammer) when ESW flow is initiated upon shutdown of the normal Service Water (SW) system 7
System Operation
- 1. Initiating event
- 2. Service water shutdown, system begins to drain down
- 3. EDG start
- 4. Sequencer operation
- 5. Cross-tie valve operation
- 6. Start ESW pumps
- 7. ESW flow in bypass mode
- 8. Main ESW Valves open, full flow of ESW 8
Effects of this Modification
- 1. Reduces system column closure effects
- 2. Reduction in pressure pulse
- 3. Reduction in piping loads
- 4. Remains within design specifications 9
Analytical Methods Used Computer modeling (vice hand calculation) using the same calculation methods as existing plant license
- Hydraulic network evaluation
- Void closure pressure - Joukowsky Equation 10
Conclusion
- The 50.59 process has concluded that prior NRC approval not required
- WCNOC intends to implement the proposed modifications to the ESW by completion of mid-cycle outage during spring of 2014.
11
Schedule for Implementation
- Complete design Oct. 29, 2013
- Receive valves & materials Jan. 6, 2014
- Fabrication of sub-assemblies Jan. 17, 2014
- Start outage Feb. 1, 2014
- Start-up April 2, 2014 12
Any questions or comments?
13
