ML18005A621
| ML18005A621 | |
| Person / Time | |
|---|---|
| Site: | Harris  |
| Issue date: | 09/27/1988 |
| From: | Mcduffie M CAROLINA POWER & LIGHT CO. |
| To: | NRC OFFICE OF ADMINISTRATION & RESOURCES MANAGEMENT (ARM) |
| References | |
| IEB-88-001, IEB-88-1, NLS-88-233, NUDOCS 8810050163 | |
| Download: ML18005A621 (3) | |
Text
ACCESSION NBR:8810050163 DOC.DATE: 88/09/27 NOTARIZED: YES FACIL:5()-400 Shearon Harris Nuclear Power Plant, Unit 1, Carolina AUTH.NAME AUTHOR AFFILIATION MCDUFFIE,M.A.
Carolina Power
& Light Co.
RECIP.NAME RECIPIENT AFFILIATION Document Control Branch (Document Control Desk)
SUBJECT:
Responds to NRC Bulletin 88-01 re defects in westinghouse circuit breakers.
DISTRIBUTION CODE:
IE11D COPIES RECEIVED:LTR /
ENCL 0 SIZE:
TITLE: Bulletin Response (50 DKT)
NOTES:Application for permit renewal filed.
DOCKET 05000400 05000400 RECIPIENT ID CODE/NAME PD2-1 LA BUCKLEY,B INTERNAL:'EOD/DOA AEOD/DSP/TPAB NRR RIVENBARK,G NRR/DEST/ADS 7E NRR/DOEA/EAB 11 NRR/DREP/EPB 10 NUDOCS-ABSTRACT RES/DSIR/EIB EXTERNAL: LPDR NSIC COPIES LTTR ENCL RECIPIENT ID CODE/NAME PD2-1 PD COPIES LTTR ENCL AEOD/DSP 1
NRR ALEXION,T 1
NRR/DEST/ADE 8H 1
NRR/DEST/MEB 9H 1
NRR/DOEA/GCB 11 1
N~R/XMAS RB1 2 1
EG FIB'E 02 1
GN2 FILE 01 1
NRC PDR h
D S
D S
TOTAL NUMBER OF COPIES REQUIRED:
LTTR 22 ENCL
CML Carolina Power 4 Light Company P. O. Box 1551 ~ Raleigh, N.C. 27602 M. A. McDUFFIE Senior Vice Preaident Nuclear Generation SEP 27 N8 SERIAL: NLS-88-233 United States Nuclear Regulatory Commission ATTENTION: Document Control Desk Washington, DC 20555 SHEARON HARRIS NUCLEAR POWER PLANT DOCKET NO. 50-400/LICENSE NO. NPF-63
RESPONSE
TO NRC BULLETIN 88-01 RESULTS OF LONG-TERM INSPECTIONS Gentlemen:
SUMMARY
NRC Bulletin 88-01, Defects in Westinghouse Circuit Breakers, was issued on February 5,
1988.
In this bulletin the NRC provided information on Westinghouse series DS circuit breakers and safety concerns associated with their use.
The bulletin also established short-term and long-term inspection programs for the welds on the breaker pole shafts and the alignment in the breaker closing mechanism.
Carolina Power
& Light Company (CP&L) submitted the results of the short-term inspections in a letter dated April 5, 1988.
The following discussion provided the results of the long-term inspections completed on August 30, 1988.
DISCUSSION The long-term inspections required by NRC Bulletin 88-01 consist of a visual inspection of four welds on the pole shaft and a direct check of the alignment of the breaker closing mechanism.
Attachment 1 of NRC Bulletin 88-01, Westinghouse Technical Bulletin NSID-TB-87-11, details the method for performing the inspections and provides acceptance criteria.
As part of the long-term inspection program, CP&L elected to inspect each of the seven welds shown on Figure 1 of NSID-TB-87-11.
The inspection results were found to be acceptable with the exception of the weld on the right pole lever of Reactor Trip Breaker B (RTB-B) (Item 6 on Figure 1 of NSID-TB-87-11).
This weld did not meet the acceptance criteria specified in Section 7.1 of NSID-TB-87-11.
Insufficient leg-size on the fillet weld surface was detected during the reinspection.
Breaker and weld location made visual detection of this condition difficult.
The discontinuity did not affect the integrity of the weld nor the operability of the breaker.
- However, the pole shaft was 8810050163 880927 PDR ADOCi( 05000400 PNU
Document Control Desk NLS-88-233 / Page 2
replaced and the breaker returned to service with satisfactory inspections per the bulletin requi.rements.
As requested the Company has determined the time required to prepare this response.
Approximately 36.5 man-hours were required to complete the long-term inspections.
An additional 16 man-hours were expended in the preparation and review of the requested documentation.
The total man-hours expended on NRC Bulletin 88-01, including the 32 hours3.703704e-4 days <br />0.00889 hours <br />5.291005e-5 weeks <br />1.2176e-5 months <br /> for completion and documentation of the short-term inspections, totals 84.5 manhours.
Please refer any questions regarding this submittal to Mr. Mark A.
Turkal at (919) 362-2985.
Yours very truly, Q 4Z. W.
M. A. McDuffie MAM/MAT 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 Light Company.
My commission expires: // 4 7 cP9 cc:
Mr.
W.
H. Bradford Mr. B.
C. Buckley Dr. J. Nelson Grace N
ary (Seal)
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