TXX-6017, Interim Deficiency Rept CP-86-40 Re Procurement & Use of Nonqualified Agastat Relays in Several Class 1E Applications.Initially Reported on 860528.Nonqualified Relays Will Be Replaced by 861231
| ML20215G385 | |
| Person / Time | |
|---|---|
| Site: | Comanche Peak  |
| Issue date: | 10/10/1986 |
| From: | Counsil W TEXAS UTILITIES ELECTRIC CO. (TU ELECTRIC) |
| To: | Johnson E NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION IV) |
| References | |
| CP-86-40, TXX-6017, NUDOCS 8610200343 | |
| Download: ML20215G385 (2) | |
Text
n Log # TXX-6017 File # 10110 903.11 TEXAS UTILITIES GENERATING COMPANY SKYWAY TOWER. 489 NORTH OLIVE STREET. L.B. 88. DALLAS, TEXA5 75301 October 10, 1986 WILUAM G. COUNSIL titECUTIVE WICE PWASIDENT I
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OCT I 41986 N
J Mr. Eric H. Johnson, Director Division of Reactor Safety and Projects U. S. Nuclear. Regulatory Commission 611 Ryan Plaza Drive, Suite 1000 Arlington, TX 76012
SUBJECT:
COMANCHE PEAK STEAM ELECTRIC STATION (CPSES)
DOCKET NOS. 50-445 AND 50-446 APPLICATION OF NON-QUALIFIED AGASTAT RELAYS SDAR: CP-86-40 (INTERIM REPORT)
Dear Mr. Johnson:
On May 28, 1986, we verbally notified your Mr. I. Barnes of ~a deficiency involving the procurement and use of non-qualified Agastat relays in several Class 1E applications. We have submitted interim reports logged TXX-4882 and TXX-4967, dated June 27, 1986, and August 18, 1986, respectively. We are reporting this issue under the provisions of 10CFR50.55(e) and the required information follows.
DESCRIPTION This issue resulted from a review and subsequent investigation of IE Information Notice No. 82-04, " Potential Deficiency of Certain Agastat E-7000 Series Time-Delay Relays".
Preliminary evaluation by site engineering noted a safety-related procurement specification wherein the subject relays were specified, but non-qualified relays were furnished by the equipment supplier. Additionally, some vendor originated design drawings did not specify a qualified relay as required.
SAFETY IMPLICATIONS In the event the deficiency had remained undetected, the indeterminate reliability of the timing relays could adversely affect the safety of plant operations.
CORRECTIVE ACTION Non-qualified relays will be identified by document review and inspections and will be scheduled for replacement. Vendor designed equipment drawings showing the application of Agastat 7000 series-timing relays will be reviewed and revised as necessary to require the use of pre-qualified ("E" prefixed) components for all future replacements.
Further, procurement procedures will be revised to preclude the purchase of non-qualified relays for CPSES applications.
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.TXX-6017 October 10, 1986 Page 2 Replacement activities are scheduled for completion by December 31, 1986. The schedule for the revision of affected specifications and/or drawings will be established by January 13, 1987.
We anticipate submitting our riext report by February 3, 1987.
Very truly yours, f/
W. G. Counsil JCH/amb c - NRC Region IV (0 + 1 copy)
Director, Inspection & Enforcement (15 copies)
U. S. Nuclear Regulatory Commission Washington, D. C.
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