ML20094D906
| ML20094D906 | |
| Person / Time | |
|---|---|
| Site: | Harris, North Anna  |
| Issue date: | 07/19/1984 |
| From: | Parsons R CAROLINA POWER & LIGHT CO. |
| To: | James O'Reilly NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II) |
| References | |
| CON-NRC-240 176, NUDOCS 8408090031 | |
| Download: ML20094D906 (4) | |
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s Cp&L Carolina Power & Light Company a
.. o. a P.O. Box 101, New Hill, N.C.
27562 July 19, 1984 Mr. James P. O'Reilly NRC-240 United States Nuclear Regulatory Commission Region 11 101 Marietta Street, Northwest (Suite 2900)
Atlanta, Georgia 30323 CAROLINA POWER & LIGHT COMPANY SHEARON HARRIS NUCLEAR. POWER PLANT 1986 - 900,000 KW - UNIT 1 ELECTRIC CABLES - HI-POT TEST FAILURE, ITEM 176
Dear Mr. O'Reilly:
Attached is an interim report on the subject item which was deemed reportable per the provisions of 10CFR50.55(e) on June 19, 1984.
CP&L is pursuing this matter, and it is currently projected that corrective action and submission of the final report will be accomplished by December 15, 1984.
1 hank you for your consideration in this matter.
Yours very truly, g
R. M. Parsons Project General Manager Shearon Harris Nuclear Power Plant RMP/ jam Attachment cc Messrs. G. Maxwell /R. Prevatte (NRC-SHNPP)
Mr. R. C. DeYoung (NRC) y h[UlhCN i'
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O CAROLINA POWER & LIGilT COMPANY SIIEARON liARRIS NUCLEAR POWER PLANT UNIT NO. 1 INTERIM REPORT ELECTRIC CABLES III-POT TEST FAILURE ITEM 176 JULY 19, 1984 REPORTABLE UNDER 10CFR50.55(e)
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SUBJECT:
Shearon Harris Nuclear Power Plant. Unit No. 1, 10CFR50.55(e) reportable deficiency.
Single conductor cables were damaged but not detected by inspection and testing.
ITEM:
All single conductor power cable SUPPLIED BY:
The Kerite Company, 49 Day Street, Seymour, Connecticur 06483 NATURE OF DEFICIENCY:
Cables 11755A-SB and 11755B-SH we' e in$ealle'd in r
accordance with design requirements, site installation procedures, and accepted b2 sed on inspection procedures. However, due to'a low initial reading in one of the phases in 9ach of' the three-single conductor 500 MCM circuits, the cables were suspect and additional testing not required by procedures or design docenents was performed.
As a result of the testing, cable damage was detected in both circuits.
j DATE PROBLEM OCCURRED:
May 10, 1984 DATE PROBLEM WAS REPORTCD:
On June 19, 1984, Mr. K. V. Hate' notified the NRC (Mr. A. Hardin) that this item waa' reportable per the provisions of 10CFR50.35(e).
SCOPE OF
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PROBLEM:
Until testing is completed, it is not possible to I
accurately define the scope of the problem; however, at the present time, all single conductor power cables are suspect.
1 SAFETY IMPLICATION:
If undetected damage has occurred to safety-related cables, failure could occur resulting in a loss of power to safety-related equipment.
REASON DEFICIENCY IS REPORTABLE:
This is reportable since there is a possibility that safety-related cables which have been installed, inspected, and accepted in accordance with design requirements and site procedures could be damaged and fail when put into service.
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il CORRECTIVE ACTION:
Additional testing is being performed in which the single conductor power cables are being high potential tested to determine if they are acceptable.
Since the weight of the cable is a significant factor in contributing to the cable damage, the larger size cables are being tested first. After test results are obtained for the larger cables and statistical testing of the smaller cables is completed, an evaluation will be performed to determine what additional testing of the smaller cables (if any) will be required. All cables that fail the high potential testing will be repaired or replaced based on a case-by-case engineering evaluation.
PREVENTIVE MEASURES:
Once the evaluation is completed and the cable types which are subject to undetected damage are identified, Work Procedures WP-209 (General Meggering Procedure for Equipment and Cable) and WP-210 (Installation and Termination of Wire and Cable) will be revised to include additional testing or other measures as appropriate.
FINAL REPORT: A final report will be issued once the corrective actions stated above are completed.
It is currently projected that the final report will be issued by December 15, 1984.