ML20112D172
| ML20112D172 | |
| Person / Time | |
|---|---|
| Site: | Harris  |
| Issue date: | 12/17/1984 |
| From: | Parsons R CAROLINA POWER & LIGHT CO. |
| To: | James O'Reilly NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II) |
| References | |
| CON-NRC-306, REF-PT21-84, REF-PT21-85-019-000 139, PT21-85-019-000, PT21-85-19, NUDOCS 8501140119 | |
| Download: ML20112D172 (4) | |
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-e m P. O. Box 101, New Hill, N. C. 27562 December 17,1984 Mr. James P. O'Reilly NRC-306 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 7300 PROCESS EQUIPMENT NTC CARD PROBLEM, ITEM 139
Dear Mr. O'Reilly:
Attached is our second interim report on the subject item which was deemed reportable per the provisions of 10CFR50.55(e) and 10CFR, Part 21 on June 30, 1983. CP&L is pursuing this matter, and it is currently projected that corrective action and submission of the final report will be accomplished by September 2,1985.
Thank you for your consideration in this matter.
Yours very truly,
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R. M. Parsons Project General Manager -
Completion Assurance Shearon Harris Nuclear Power Plant RMP/rt Attachment cca Messrs. G. Maxwell /R. Prevatte (NRC-SHNPP)
Mr. R. C. DeYoung (NRC)
Ckohj400 PDR OFFICIAL COPY
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o CAROLINA POWER & LIGHT COMPANY
-SHEARON HARRIS NUCLEAR POWER PLANT UNIT 1 INTERIM REPORT TEMPERATURE CHANNEL TEST (NTC) CARD ITEM NO. 139 DECEMBER 14, 1984 REPORTABLE UNDER 10CFR50.55(e) 'AND 10CFR21 U55
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SUBJECT:
Shearon Harris Nuclear Power Plant Unit No. 1, 10CFR50.55(e) and 10CFR21 reportable deficiency in the Temperature Channel Test (NTC) card purchased under the NSSS contract with Westinghouse, Purchase Order NY-435002, Shop Order 320.
ITEM:
Westinghouse 7300 Process Protection System NTC Card Relay.
SUPPLIED BY:
Westinghouse Electric Corporation, Industry Systems Division, Pittsburgh, Pennsylvania.
NATURE OF DEFICIENCY:
During seismic testing of the Temperature Channel Test (NTC) card, contact bounce was experienced in the mercury relay utilized on this card.
DATE PROBLEM OCCURRED:
CP&L received notice of this problem in Westinghouse Letter CQL-7451 on June 23, 1983.
DATE PROBLEM REPORTED:
June.30, 1983, CP&L (N. J. Chiangi) notified the NRC (A. Hardin) that this item was reportable per the provisions of iOCFR50.55(e) and 10CFR21.
July 28, 1983, CP&L (R. M. Parsons) submitted an interim report to the NRC (James P. O'Reilly).
SCOPE OF PROBLEM:
The deficiency involves a total of 44 NTC relay cards for Unit 1.
SAFETY IMPLICATION:
Intermittent contact bounce of the NTC card may result in signal saturation of the downstream RTD
- ~'
amplifier (NRA) card in the T hot and.T cold' circuits, of the Westinghouse 7300 process protection system.-
This could result.in a. delay in the initiation of the overtemperature
. Delta T and' overpower - Delta T reactor trips.
REASON DEFICIENCY IS REPORTABLE: This item is reportable because these reactor trip-l '
1 delays could~ delay orLprevent safe shutdown of the.
plant when required.
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e CORRECTIVE ACTION:
Westinghouse will replace these NTC relay cards.
PREVENTIVE MEASURES:
Westinghouse will perform qualification testing of NTC cards to determine the appropriate relay that will have the necessary seismic performance.
FINAL REPORT:
To date, Westinghouse has not replaced the NTC relay cards; therefore, the final report cannot be issued.
It is currently projected that the final report will be~ issued by September 2, 1985.
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