IR 05000382/1993020
| ML20045C097 | |
| Person / Time | |
|---|---|
| Site: | Waterford  |
| Issue date: | 06/07/1993 |
| From: | Powers D NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION IV) |
| To: | |
| Shared Package | |
| ML20045C093 | List: |
| References | |
| 50-382-93-20, NUDOCS 9306220074 | |
| Download: ML20045C097 (6) | |
Text
e
.
APPENDIX U.S. NUCLEAR REGULATORY COMMISSION
REGION IV
Inspection Report:
50-382/93-20 Operating License:
NPF-38 Licensee:
Entergy Operations, Inc.
P.O. Box B Killona, Louisiana 70066
Facility Name:
Waterford Steam Electric Station, Unit 3 Inspection At:
Taft, Louisiana Inspection Conducted: May 24-28, 1993 Inspector:
L. D. Gilbert, Reactor Inspector, Maintenance Section Division of Reactor Safety Approved:
4M/M I/7[M Dr. Dale A. Powers, Chief, Maintenance Section Date Division of Reactor Safety
,
.
Inspection Summary Areas Inspected:
Routine, announced inspection of the implementation of the
,
erosion / corrosion monitoring program.
Results:
The licensee effectively implemented the erosion / corrosion monitoring
program (Section 2.2).
The responsible engineer was knowledgeable of the erosion / corrosion
monitoring program and effectively coordinated the program (Section 2.2).
Summary of Inspection Findings:
No inspection findings were opened or closed.
- Attachments:
Attachment I - Persons Contacted and Exit Meeting
Attachment 2 - Documents Reviewed
9306220074 930616
)
PDR ADOCK 05000382 G
-
_.
.
,
.
-2-DETAILS 1 PLANT STATUS During this inspection period, the plant was operating at power.
2 INSPECTION OF EROSION / CORROSION MONITORING PROGRAMS (49001)
The objectives of this inspection were to ascertain whether licensee commitments and procedures that were developed and implemented to address the long-term erosion / corrosion monitoring program were in accordance with NRC requirements and Generic Letter 89-08, " Erosion / Corrosion-Induced Pipe Wall Thinning." This portion of t h inspection primarily addressed the licensee's implementation of the erosion / corrosion monitoring program. The inspection of the programmatic aspects of the licensee's erosion / corrosion monitoring program was documented in NRC Inspection Report 50-382/93-15.
2.1 Discussion In order to review the implementation of the erosion / corrosion monitoring program, the inspector selected a number of components from four piping systems:
steam generator feedwater, steam generator blowdown, feedwater heater drain, and extraction steam.
The components selected from the feedwater system were Components 102-034 (a 45-degree elbow), 102-037 (a 90-degree elbow), 102-45 (a 20-inch diameter pipe), and 102-270 (a 12-inch by 6-inch reducer). The components selected from the blowdown system were Components 103-005 (a 90-degree elbow) and 103-027 (a 2-inch by 4-inch swage).
The comporants selected from the heater drain system were Components 104-123 (a 90-degree elbow) and 104-307A/B (a tee).
The components selected from the extraction steam system were Components 105-013 (a 90-degree elbow), 105-014 (a 90-degree elbow), and 105-218 (a 90-degree elbow).
For each of the components, the inspector reviewed the thickness measurement report from the last refueling outage (RF05) and the resulting wear rate and remaining life calculations.
The values obtained for wear rates and remaining life of components were consistent with the measured thickness readings. The minimum measured thickness for each component was reviewed against tha criteria established by design engineering in Calculation EC-P92-017,
" Acceptable Minimum Wall Thickness," Revision 0.
For those sampled components with a measured thickness less than the specified acceptable thickness, the inspector verified that the results had been evaluated and satisfactorily dispositioned by design engineering. After reviewing the engineering disposition and remaining life calculation for each component, the inspector verified that the component had been replaced or scheduled for an examination within the specified number of fuel cycles.
For component replacement in the extraction steam system, the inspector verified that an upgrade material had been used and other components had been examined to satisfy material upgrade
F
.
.
-3-and program expansion requirements of Nuclear Operations Engineering and Construction Procedure N0ECP-254, " Control of Erosion / Corrosion," Revision 2.
During review of the ultrasonic thickness measurement reports, the inspector noted that the minimum and maximum ultrasonic readings recorded for the component examinations were not always within the two calibration block thicknesses check used for calibration.
The instrument used for thickness measurements was an ultrasonic thickness gage, Model 26DL Plus.
This concern was discussed with the responsible Level III examiner for ultrasonic examinations. The Level III examiner required the used of Model 26DL Plus, which has both a digital thickness meter and an "A" scan display. The digital readout was used for obtaining the thickness measurements. The
"A" scan display was only used for discriminating between low-thickness raadings resulting from thin material and low-thickness readings caused 'Jy laminations in the material. Therefore only the digital meter required cdibration. The calibration requirements for the digital thickness meter were not explicit in the Quality Assurance Procedure QAP-388, " Ultrasonic Thickr.ess Measurement,"
Revision 1.0; but referenced the manufacturer's instruction manual. The instruction manual specified that the digital meter was good for measuring thicknesses up to 10 inches with a resolution of 0.001 inch. The instruction manual recommended a calibration verification using calibration blocks of-similar material, which was documented as having been accomplished. The inspector was informed by the Level III examiner that the procedures would likely be revised to further clarify calibration instructions for the two different types of ultrasonic instruments used for taking thickness measurements and documentation requirements related to calibration.
The inspector also reviewed the certification of ultrasonic equipment, calibration blocks, and the NDE personnel used for performing the thickness measurements during the last refueling outage. The equipment and personnel met the calibration interval and certification requirements, respectively, of Quality Assurance Procedure QAP-388, and Directive C2.901, " Contract Personnel Screening for NDE," Revision 0.
The responsible engineer was knowledgeable of the program requirements for the monitoring of piping and effectively coordinated the program.
In addition, the inspector walked down a portion of the feedwater and extraction steam piping systems for a comparison of the installed piping configuration to the piping drawings used to establish the plant model for erosion / corrosion analysis. For the feedwater system, the piping installed in the plant from Feedwater Pump B to High Pressure Heaters lA, 1B, and 1C was inspected and found to be consistent with the isometric drawings 4305-3250R6, 4305-3258R4, and 4305-3262R7.
For the extraction steam system, the piping installed in the plant from the high pressure turbine to High Pressure Heaters lA, 18, and 1C was inspected and found to be consistent with the isometric drawings 4305-1315Rll and 4305-7516R7. The inspector verified, during the previous inspection documented in NRC Inspection Report 50-382/93-15, that the geometry codes used as input data for the plant model were in agreement with
.
the piping isometric drawings for the feedwater and extraction steam piping system.2 Conclusions For those sampled components with a measured thickness less than the specified acceptable thickness, the licensee properly evaluated and satisfactorily dispositioned those results.
The licensee effectively implemented the erosion / corrosion monitoring program and upgraded piping system components where appropriate to reduce the effects of flow-accelerated corrosion on piping integrity.
The resnonsible engineer was knowledgeable of the program requirements for the monitoring of piping degradation and effectively coordinated the progra P'
.
.
ATTACHMENT 1 1 PERSONS CONTACTED 1.1 Licensee Personnel
- J. Abisamra, Supervisor, Design Engineering
- R. Bennett, Supervisor, Quality Assurance
- M.
Bratton, Nondestructive Examination level III
- T. Gaudet, Supervisor, Operational Licensing
- J. Hologa, Manager, Mechanical and Civil Engineering
- J. Howard, Manager, Procurement and Programs Engineering
- J. Rhodes, Erosion / Corrosion Program Engineer
- G. Robin, Inservice Inspection Lead Engineer
- R. Starkey, Manager, Outage and Maintenance 1.2 NRC Personnel
- K. Kennedy, Project Engineer In addition to the personnel listed above, the inspector contacted other personnel during this inspection period.
- Denotes personnel that attended the exit meetirg.
,
2 EXIT MEETING An exit meeting was conducted on May 28, 1993. During this meeting, the inspector reviewed the scope and findings of the report.
The licensee did not identify as proprietary any infermation provided to, or reviewed by, the inspector.
-
- -
f
.
.
ATTACMMENT 2 DOCUMENTS REVIEWED Calculation 0490-115-001, "Waterford 3 Extraction Steam CHECMATE Model,"
Revision 0 Calculation 0490-115-002, "Waterford 3 Heater Drains CHECMATE Model,"
Revision 0 Calculation 0490-115-003, "Waterford 3 Blowdown System CHECMATE Model,"
Revision 1 Calculation 0490-115-005, "CHECMATE Model of Waterford 3 Feedwater Piping,"
Revision 0 Calculation 0490-115-008, "Waterford 3 CHEC Calculations," Revision 0 Calculation EC-P92-036, " Evaluation of Pipe Wall Thinning Due to Erosion / Corrosion," Revision 0 Calculation EC-P92-048, " Evaluation of Pipe Wall Thinning Due to Erosion / Corrosion," Revision 0 Calculation EC-P92-051, " Evaluation of Pipe Wall Thinning Due to Erosion / Corrosion," Revision 0 Calculation EC-P92-070, " Evaluation of Pipe Wall Thinning Due to Erosion / Corrosion," Revision 0 Quality Assurance Audit Report SA-92-032.1, " Inservice Inspection Program,"
dated December 4, 1992 Quality Assurance Surveillance QS-92-051, "RF05 Gridding of Piping and Components for Use in Erosion / Corrosion Ultrasonic Thickness Measurements,"
dated October 16, 1992 Quality Assurance Surveillance QS-92-052, "RF05 Ultrasonic Testing of Erosion / Corrosion Program Piping by U. S. Testing Company," dated October 9, 1992 Quality Assurance Procedure QAP-370, " Training, Qualification and Certification of Level III NDE Personnel," Revision 0.0 Directive C2.801, "NDE Certification," Revision 0