ML032810137
| ML032810137 | |
| Person / Time | |
|---|---|
| Site: | Summer  |
| Issue date: | 10/06/2003 |
| From: | Landis K NRC/RGN-II/DRP/RPB5 |
| To: | Byrne S South Carolina Electric & Gas Co |
| Shared Package | |
| ML032810121 | List: |
| References | |
| Download: ML032810137 (43) | |
Text
Steve Byrne Senior VP, Nuclear Operations Jeff Archie General Manager, Nuclear Plant Operations Mike Fowlkes General Manager, Engineering Services Ron Clary Manager, Nuclear Licensing Alan Torres Outage Manager Jerry Weatherford RHR Retrofit Project Lead
- VCS Organization Changes Steve Byrne
- RF-14 Alan Torres
- Reactor Vessel ISI Ron Clary
- RHR Pump Jerry Weatherford
V. C. Summer Nuclear Station Management Organizational Changes Dan Gatlin Manager Operations Frank Bacon Manager Chemistry Shaun Zarandi Manager Maintenance Services L. A. Blue Manager Health Physics Alan Torres Manager Planning / Outage Jeff Archie General Manager Nuclear Plant Operations Terry Matlosz Manager Org. Dev. & Perf.
Chris Caston Team Leader Document Control & Records Dave Lavigne General Manager Org. Effectiveness John Nesbitt Manager Materials & Procurement Wayne Stuart Manager Plant Support Engineering TBD Manager Design Engineering Mike Fowlkes General Manager Engineering Services Ron Clary Manager Nuclear Licensing Steve Furstenberg Manager Nuclear Training Mel Browne Manager Quality Systems Mark Findlay Manager Nuclear Protection Services Ken Nettles General Manager Nuclear Support Services Bob Waselus Manager Stragetic Plan. & Dev.
Steve Byrne Sr. Vice President Nuclear Operations Division
- Human Performance
- Corrective Action Program
- Root Cause Analysis
- Operating Experience
- Trend Analysis
- Self Assessments
- Benchmarking
General Overview
- Our Number 1 Goal
- Safety
- Nuclear
- Radiological
- Industrial
- Duration - 36 days
- Dose goal - To be determined after source term
- Emphasize human performance
- Modifications
- RHR pump seal
- Complete RHR miniflow switch relocation
- RHR vent addition
- CW pump trip circuitry
- Feedwater heater level transmitter logic change
- Gravity boration flow path
- Reactor Vessel
- Ten Year ISI
- Bare metal visual inspections - Head/BMI
- Low pressure turbine maintenance
- ILRT of the Reactor Building
- A Train electrical maintenance
- B CCW heat exchanger repair and coating
- C RCP
- Seal replacement
- Motor replacement
Steve Byrne Senior VP, Nuclear Operations Jeff Archie General Manager, Nuclear Plant Operations Mike Fowlkes General Manager, Engineering Services Ron Clary Manager, Nuclear Licensing Alan Torres Outage Manager Jerry Weatherford RHR Retrofit Project Lead
- VCS Organization Changes Steve Byrne
- RF-14 Alan Torres
- Reactor Vessel ISI Ron Clary
- RHR Pump Jerry Weatherford
V. C. Summer Nuclear Station Management Organizational Changes Dan Gatlin Manager Operations Frank Bacon Manager Chemistry Shaun Zarandi Manager Maintenance Services L. A. Blue Manager Health Physics Alan Torres Manager Planning / Outage Jeff Archie General Manager Nuclear Plant Operations Terry Matlosz Manager Org. Dev. & Perf.
Chris Caston Team Leader Document Control & Records Dave Lavigne General Manager Org. Effectiveness John Nesbitt Manager Materials & Procurement Wayne Stuart Manager Plant Support Engineering TBD Manager Design Engineering Mike Fowlkes General Manager Engineering Services Ron Clary Manager Nuclear Licensing Steve Furstenberg Manager Nuclear Training Mel Browne Manager Quality Systems Mark Findlay Manager Nuclear Protection Services Ken Nettles General Manager Nuclear Support Services Bob Waselus Manager Stragetic Plan. & Dev.
Steve Byrne Sr. Vice President Nuclear Operations Division
- Human Performance
- Corrective Action Program
- Root Cause Analysis
- Operating Experience
- Trend Analysis
- Self Assessments
- Benchmarking
- Reactor Vessel
- Ten Year ISI
- Bare metal visual inspections - Head/BMI
- Low pressure turbine maintenance
- ILRT of the Reactor Building
- A Train electrical maintenance
- B CCW heat exchanger repair and coating
- C RCP
- Seal replacement
- Motor replacement
- Finding the fuel leak
- Coating the B CCW heat exchanger
- Timing of inspection of bottom of Reactor Vessel
- V. C. Summer currently in 2nd ISI Interval
- January 1, 1994 through December 31, 2003
- RF-14 scheduled October 11 through November 15, 2003
- 10 year ISI
- Reactor Vessel *
- Cold Legs*
- Hot Legs
- Core barrel must be removed to perform
- Fully qualified for detection and length sizing of circumferential flaws
- Procedure limitation in the detection of axial flaws
- Limited qualifications for depth sizing of flaws
- Demonstrated to size within 7.38 % RMSP of the wall thickness at the location of the flaw
- Circumferential and axial directions
- Remote Enhanced Visual
- Surface Profile Mapping
Detected Circ Flaw Length Size - UT Depth Size - UT Difference between actual vendor RMS sizing error and 0.125 RMS will be added to the through-wall size before assessment.
Detected Axial Flaw Length Size - ET First Option - UT Difference between actual vendor RMS sizing error and 0.125 RMS will be added to the through-wall size before assessment.
Second Option -
Conservative depth assumption based on ET measured length if not detected by UT.
Loop Leg RF-12 Circ.
Location/
Orientation RF-12 Length (Eddy Current)
RF-13 Length (Eddy Current)
RF-13 UT Length /
Depth A
Cold (N335) 326/circ.
0.5 B
Hot (N265) 35/circ.
0.6 0.5 200.8/axial**
0.25 0.5
- 0.625 /
0.317 348/axial 0.25 0.25 B
Cold (N215)
No Indications C
Hot (N145) 309/circ.**
0.5 0.5 0.375 /
0.11 C
Cold (N95) 200/circ.
0.5
- Attributed to improved detection and sizing capability
- Indications also defined by UT examination. Evaluated and accepted to IWB 3600.
- Identify and characterize the previously identified indications
- If all previously identified indications are not found - then supplemental NDE must be performed
- Discuss actual inspection results with NRR
- If the results demonstrate no crack growth:
- Restart without the need for further (beyond RF-14)
NRC staff approval
- Complete three successive examinations of the welds in accordance with ASME Code requirements
- Provide highlighted reference in cover letter of 90 day ISI report on Hot Leg exam results
- Results of RF-14 examinations will drive NRC staffs expectations for future NDE
- Demonstration that current examination methods accurately characterize indications (may not need supplemental NDE)
- Surface indication results show not a flaw (may not need supplement NDE)
- Inconclusive surface indication results (may need supplement NDE)
- Staff evaluation is required
- If the condition is safe for the duration of the next outage, then the licensee will be allowed to restart for one cycle, subject to new inspection requirements
- VC Summer and NRR agreed at the 9-10-03 meeting that the direction being taken by VC Summer in RF-14 is appropriate.
RF-14 RHR Retro Fit Modification VC SUMMER Westinghouse FlowServe
- Scope of modification A RHR Pump
- Support stand
- Spacer coupling
- Upper & lower hub Assembly
- Project duration 5 days
Seal cooler Seal cooler Impeller 10 inches Stuffing Box 12 inches X 41 inches Motor 47 inches Approximately 6000 lbs
18 by 18 opening Support stand with an 18 X 18 opening seal Bearing Housing
Upper (Driver)
Hub Assembly Lower (Pump)
Hub Assembly