GO2-99-057, Forwards Rev 0 to Calculation ME-02-98-04, Fracture Mechanics Evaluation of N1 Nozzle Safe End. Info Will Be Used to Assist NRC in Review of WNP-2 ISI Activities Associated with Evaluation of Planar Indication
| ML17292B613 | |
| Person / Time | |
|---|---|
| Site: | Columbia  |
| Issue date: | 03/24/1999 |
| From: | Coleman D WASHINGTON PUBLIC POWER SUPPLY SYSTEM |
| To: | NRC OFFICE OF INFORMATION RESOURCES MANAGEMENT (IRM) |
| Shared Package | |
| ML17292B614 | List: |
| References | |
| GL-88-01, GL-88-1, GO2-99-057, GO2-99-57, NUDOCS 9904010217 | |
| Download: ML17292B613 (4) | |
Text
REGULA'1 Y INFORMATION DISTRIBUTIO SYSTEM (RIDS) 5 I
ACCESSION NBR:9904010217 DOC.DATE: 99/03/24 NOTARIZED: NO DOCKET FACIL:50-397 WPPSS Nuclear Project, Unit 2, Washington Public Powe 05000397 AUTH.NAME AUTHOR AFFILIATION COLEMAN,D.W.
Washington Public Power Supply System RECIP.NAME RECIPIENT AFFILIATION Records Management Branch (Document Control Desk)
SUBJECT:
Forwards Rev 0 to Calculation ME-02-98-04, "Fracture Mechanics Evaluation of Nl Nozzle Safe End." Indication considered ultrasonic signal reflector condition from fabrication repair.
DISTRIBUTION CODE:
A047D COPIES RECEIVED:LTR l
ENCL g SIZE:
TITLE: OR Submittal: Inservice/Testing/Relief from ASME Code - GL-89-04 NOTES:
A E
RECIPIENT ID CODE/NAME PD4-2 LA CUSHING, J INTERNAL: ACRS-Q'ILE CENTER 01)~
NUDOCS -ABSTRACT RES/DET/EIB EXTERNAL: LITCO ANDERSON NRC PDR COPIES LTTR ENCL 1
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1 RECIPIENT ID CODE/NAME PD4-2 PD AEOD/SPD/RAB NRR/DE/ECGB OGC/HDS3 RES/DET/EMMEB NOAC COPIES LTTR ENCL 1
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'-~u&iLiLILgt~JQ~ 'l NOTE TO ALL "RIDS" RECIPIENTS:
PLEASE HELP US TO REDUCE WASTE. TO HAVE YOUR NAME OR ORGANIZATION REMOVED FROM DISTRIBUTION LISTS OR REDUCE THE NUMBER OF COPIES RECEIVED BY YOU OR YOUR ORGANIZATION, CONTACT THE DOCUMENT CONTROL DESK (DCD)
ON EXTENSION 415-2083 TOTAL NUMBER OF COPIES REQUIRED:
LTTR 14 ENCL 13
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ii WASHINGTON PUBLIC POWER SUPPLY SYSTEM P.O. Box 968
~ Richland, Washington 99352-0968 March 24, 1999 G02-99-057 Docket No. 50-397 U.S. Nuclear Regulatory Commission Attn: Document Control Desk Washington, DC 20555 Gentlemen:
Subject:
sWNP-2 OPERATING LICENSE NPF-21, ANALYTICALEVALUATIONOF INSERVICE INSPECTION EXAMINATIONRESULTS, ADDITIONALINFORMATION
Reference:
Letter GO2-98-213 dated December 15, 1998, DW Coleman (SS) to NRC, "Analytical Evaluation of Inservice Insp'ection Examination Results"
/
To complement the information provided to your staff during conference calls on February 2 and 25, 1999, the Supply System is docketing the attached reports. It is our understanding that this information will be used to assist the NRC staff in review of WNP-2 Inservice Inspection (ISI) activities associated with the evaluation of a ptanar indication found on weld number 24RRC(2)A-1 during the Spring 1998 refueling outage.
This information was not required to be submitted to the NRC for review and approval prior to resumption of operation (under Generic Letter 88-01) in that the planar indication was determined not to be a crack or an indication due to Intergranular Stress Corrosion Cracking (IGSCC).
The indication is considered an ultrasonic signal reflector condition from a fabrication repair.
However, since a direct correlation between the repair and the inservice examination can not be made, it was conservatively decided to evaluate the indication as ifthe IGSCC mechanism is active, and apply the worst case loading to determine ifthe indication is acceptable for continued operation.
Using this conservative
- approach, the reporting requirement of ASME Section XI, Subsection IWB-3134(b),
was implemented.
This requirement was satisfied by the referenced correspondence of December 15, 1998.
99040102i7 990324 PDR ADQCK 05000397,.
8 PDR
ANALYTIGALEVALUATIONOF INSERVICE INSPECTION EXAMINATIONRESULTS, ADDITIONALINFORMATION Page 2 Should you have any questions or desire additional information regarding this matter, please contact me or Mr. PJ Inserra at (509) 377-4147.
Respectfully, DW Coleman Manager, Regulatory Affairs MailDrop PE20 Attachments:
- 1) Calculation ME-02-98-04, Rev. 0, Fracture Mechanics Evaluation ofNl Nozzle Safe End
- 2) GE Nuclear Energy, Examination Summary Sheet, Report No. R-R13-031
- 3) GE Nuclear Energy, Examination Summary Sheet, Report No. R-R13-031-S CC:
EW Merschoff - NRC RIV (w/o)
JS Cushing - NRC NRR NRC Sr. Resident Inspector - 927N (w/o)
DLWilliams - BPA/1399 (w/o)
PD Robinson - Winston &Strawn (w/o)
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