ML20024D540
| ML20024D540 | |
| Person / Time | |
|---|---|
| Site: | Harris  |
| Issue date: | 07/28/1983 |
| From: | Parsons R CAROLINA POWER & LIGHT CO. |
| To: | James O'Reilly NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II) |
| References | |
| CON-NRC-102 10CFR-050.55E, 10CFR-50.55E, NUDOCS 8308050222 | |
| Download: ML20024D540 (4) | |
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27562 July 28, 1983 Mr. James P. O'Reilly NRC-102 United States Nuclear Regulatory Commission Region II 101 Marietta Street, Northwest (Suite 2900)
Atlanta, Georgia 30303 CAROLINA POWER & LIGHT COMPANY SHEARON HARRIS NUCLEAR POWER PLWT 1986 900,000 KW - UNITS 1 & 2 7300 PROCESS EQUIPMENT NTC CARD PROBLDI, ITEM 139
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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 30, 1983. CP&L is pursuing this matter, and it is currently projected that corrective action and sub-mission of the final report will be accomplished by January 1, 1985.
Thank you for your consideration in this matter.
Yours very truly, fW R. M. Parsons Project General Manager Shearon Harris Nuclear Power Plant RMP/sh Attachment cc: Messrs. G. Maxwell /R. Prevatte (NRC-SHNPP)
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r CAROLINA POWER & LIGHT COMPANY SHEARON HARRIS NUCLEAR POWER PLANT UNIT NOS. 1 AND 2 INTERIM REPORT NO. 1 TEMPERATURE CHANNEL TEST (NTC) CARD ITDI NO.139 JULY 26, 1983 REPORTABLE UNDER 10CFR50.55(e) l l
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S UBJE CT:
Shearon Harris Nuclear Power Plant Unit Nos.1 and 2, 10CFR50.55(e) 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 OCCUR RED:
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 10CFR50.55(e).
SCOPE OF PROBLEM:
The deficiency involves a total of 44 NTC relay cards for Units 1 and 2.
SAFETY IMPLICATION:
In te rmi ttent contact bounce of the NTC card may result in signal saturgtion of {he downstream RTD amplifier (NRA) card in the hot and cold circuits of the W stinghouse 7300 e
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 delays i
could delay or prevent safe shutdown of the plant when required.
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o CORRECTIVE ACTION:
Westinghouse will replace these NTC relay cards by June 31, 1984.
PREVENTATIVE MEASURES:
Westinghouse will perform qualification testing of ITIC cards to determine the appropriate relay that will have the necessary seismic performance.
FINAL REPORT: A final report is expected by January 1,1985.
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