ML20081K183
| ML20081K183 | |
| Person / Time | |
|---|---|
| Site: | Bellefonte  |
| Issue date: | 11/04/1983 |
| From: | Mills L TENNESSEE VALLEY AUTHORITY |
| To: | James O'Reilly NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II) |
| References | |
| 10CFR-050.55E, 10CFR-50.55E, NUDOCS 8311090297 | |
| Download: ML20081K183 (2) | |
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TENNESSEE VALLEY AUTHORITY CH ATTANOOGA. TENNESSEE 374ot 400 Chestnut Street Tower II November 4, 1983 I /lg,24 BLRD-50-438/83-54 BLRD-50-439/83-47 U.S. Nuclear Regulatory Comission Region II Attn:
Mr. James P. O'Reilly, Regional Adninistrator 101 Marietta Street, NW, Suite 2900 Atlanta, Georgia 30303
Dear Mr. O'Reilly:
BELLEFONTE NUCLEAR PLANT UNITS 1 AND 2 - CONTACT GAPS IN HFA RELAYS NOT ADJUSTED PROPERLY - BLRD-50-438/83-54, BLRD-50-439/63 FIRST INTERIM REPORT The subject deficiency was initially reported to NRC-0IE Inspector Linda Watson on October 13, 1983 in accordance with 10 CFR 50 55(e) as NCR 2491. Enclosed is our first interim report. We expect to submit our next report by July 8, 1984.
If you have any questions, please get in touch with R. H. Shell at FTS 858-2688.
Very truly yours, TENNESSEE VALLEY AUTHORITY L. M. Mills, !!anager Nuclear Licensing Enclosure oc:
Mr. Richard C. DeYoung, Director (Enclosure)
Office of Inspection and Enforcement U.S. Nuclear Regulatory Commission Washington, D.C.
20555 Records Center (Enclosure)
Institute of Nuclear Power Operations 1100 Circle 75 Parkway, Suite 1500
- Atlanta,. Georgia 30339 B311090297 831104 PDR ADOCK 05000438 S
. WMCIAL Qipp 1983-TVA SOTH ANNIVERSARY An Equal Opportunity Employer l
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=o ENCLOSURE s'h BELLEFONTE NUCLEAR PLANT UNITS 1 AND 2 CONTACT GAPS IN HFA RELAYS NOT ADJUSTED PROPERLY BLRD-50-438/83-54, BLPD-50-439/83-47 NCR 2491 10 CFR 50.55(e)
FIRST INTERIM REPORT Description of Deficiency The 6.9 kV and the 13.8 kV class 1E switchgear at Bellefonte Nuclear Plant (BLN) utilize General Electric (GE) type HFA relays in various applications. TVA replaced the coils in these relays per GE service advice (SA).721-PSM-152.2, dated November 21, 1980, and per the disposition of NCR BLN EEB 8101 (BLRD-50-438/81-37, BLRD-50-439/81-40). During replacement, the coil gap and wipe settings should have been adjusted per GE service manuals GEH-2024 and GEK 45484 for type HFA 51 and HFA 151 relays, respectively. The replacement procedure and contact gap and wipe settings were not documented at the time of replacement. Therefore, there is no way to assure that the settings for the affected relays are correct.
Interim Progress TVA has determined that the coils were replaced on 66 type HFA relays at BLN. The recommended disposition of this deficiency is to check and reset the contact gap and wine settings on all of the affected relays per GE service information letter No. 44. BLN construction engineering personnel will be instructed to obtain all approved vendor instructions before performing equipment modificationc.
-TVA is also investigating the applicability of this deficiency to Watts Bar Nuclear Plant (WBN). It has been identified that the coils were replaced on 110 GE type HFA relays at WBN per the disposition of NCR WBN EEB 8206 (WBRD-50-390/82-79, WBRD-50-391/82-75). Any deficiencies of this nature found at WBN will be documented as required by TVA's OA program.
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