ML18005A685
| ML18005A685 | |
| Person / Time | |
|---|---|
| Site: | Harris  |
| Issue date: | 10/27/1988 |
| From: | Mcduffie M CAROLINA POWER & LIGHT CO. |
| To: | NRC OFFICE OF ADMINISTRATION & RESOURCES MANAGEMENT (ARM) |
| References | |
| IEB-88-002, IEB-88-2, NLS-88-255, NUDOCS 8811040167 | |
| Download: ML18005A685 (3) | |
Text
ACCELERATED DIRIBUTION DEMONSTh%TION SYSTEM REGULATORY INFORMATION DISTRIBUTION SYSTEM (RIDS)
ACCESSION NBR: 8811040167 DOC. DATE: 88/10/27 NOTARIZED: YES FACIL:50-400 SheMdK Harris Nuclear Power Plant, Unit 1, Carolina AUTH.NAME AUTHOR AFFILIATION MCDUFFIE,M.A.
Carolina Power 6 Light Co.
RECIP.NAME RECIPIENT AFFILIATION Document Control Branch (Document Control Desk)
DOCKET 05000400
SUBJECT:
Responds to NRC Bulletin 88-002, "Rapidly Propagating Fatigue Cracks in Steam Generator Tubes."
R DISTRIBUTION CODE:
IE13D COPIES RECEIVED:LTR 2 ENCL G
SIZE:
I TITLE: Bulletin Response, 88-02. Rapidly Propagating Fatigue Cracks zn Steam NOTES:Application for permit renewal filed.
05000400 8
RECIPIENT ID CODE/NAME PD2-1 LA BUCKLEY,B INTERNAL: AEOD/DSP/TPAB NRR NEIGHBORS s D NRR/DEST/ADS 7E NRR/DOEA/EAB 11 NRR/DREP/EPB10A NUDOCS-ABSTRACT RES/DSIR/EIB EXTERNAL: LPDR NSIC COPIES LTTR ENCL RECIPIENT ID CODE/NAME PD2-1 PD NRR MURPHY,E NRR/DEST/ADE8H3 NRR/DEST/MEB 9H NRR/DOEA/GCB 11 N
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Carolina Power tt Light Company SERIAL: NLS-88-255 10CFR50.
United States Nuclear Regulatory Commission ATTENTION: Document Control Desk Washington, DC 20555 SHEARON HARRIS NUCLEAR POWER PLANT DOCKET NO. 50-000/LICENSE NO. NPF-63 RESPONSE TO NRC BULLETINNO. 88-02 Gentlemen:
Carolina Power R Light Company (CPRL) hereby submits additional information in response to NRC Bulletin No. 88-02, "Rapidly Propagating Fatigue Cracks in Steam Generator Tubes," for the Shearon Harris Nuclear Power Plant (SHNPP).
NRC Bulletin 88-02 requested that holders of operating licenses for Westinghouse designed nuclear power reactors with steam generators having carbon steel support plates review steam generator inspection data for evidence of denting of the uppermost support plate.
By letter dated March 20, 1988, CPRL submitted its initial response to this Bulletin, which committed to complete an inspection of at least 396 of the steam generator U-tubes at the uppermost support plate.
These inspections were completed on September 12, 1988, during the scheduled refueling outage.
The following number of tubes were inspected in each steam generator:
Steam Generator No.
No. of Tubes Ins ected 1A-SN lB-SN 1C-SN 939 928 926 20 20 20 The inspections indicated no evidence of tube denting at the uppermost support plate, and no'evidence of excessive magnetite in the tube-to-support plate crevices.
Since the inspection did not indicate a problem at SHNPP, interim controls implemented as required by the Bulletin 88-02 could be discontinued.
Carolina Power R Light Company intends to maintain these controls as a prudent measure to detect and respond to primary to secondary leakage.
However, these are considered voluntary measures which can be discontinued or modified without prior notice to the NRC, unless future inspections reveal-denting problems in the uppermost support plate region.
Qggj9/ lg 411 t:ayettevitte Street
~ P. O. Box 1551
~ Raleigh. N. C. 27602 As required by Bulletin Item B, CPRL hereby commits to review the results of future steam generator tube inspections for evidence of denting at the uppermost support plate. If denting is found in the future, a program to satisfy the provisions of Bulletin Item C willbe implemented.
8811040167 881027 PDR ADOCK 05000400 9
Dr. 3. Nelson Grace NLS-88-255 / page 2 No further action is required by NRC Bulletin 88-02, and CPdcL considers this item closed for SHNPP.
Yours very truly, M. A. McDuffie Senior Vice President Nuclear Generation MAM/3HE/lah (50793HE) cc:
Mr. W. H. Bradford Mr. B. C. Buckley Mr. Malcolm L. Ernst (Acting Regional Administrator)
M. A. McDuffie, having been first duly sworn, did depose and say that the information contained herein is true and correct to the best of his information, knowledge and belief; and the sources of his information are officers, employees, contractors, and agents of Carolina Power k Light Company.
My commission expires: ///47/cPP Notary Seal
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