ML20099M072
| ML20099M072 | |
| Person / Time | |
|---|---|
| Site: | Bellefonte  |
| Issue date: | 02/27/1985 |
| From: | Hufham J TENNESSEE VALLEY AUTHORITY |
| To: | Grace J NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II) |
| References | |
| REF-PT21-85, REF-PT21-85-136-000 NCR-3511, PT21-85-136, PT21-85-136-000, NUDOCS 8503210215 | |
| Download: ML20099M072 (2) | |
Text
I TENNESSEE VALLEY AUTHORITY
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B541R6Fegyry 27, 1985 40 BLRD-50-438/84-53 BLRD-50-439/84-49 U.S. Nuclear Regulatory Cmmission Region II Attn:
Dr. J. Nelson Grace, Regiomi Administrator 101 Marietta Street, NW, Suite 2900 Atlanta, Georgia 30323
Dear Dr. Grace:
BELLEFONTE NUCLEAR PLANT UNITS 1 AND 2 - VARIOUS IEFICIENCIES INVa.VING LANDA PO)ER SUPPLIES - BLRD-50-438/84-53 AND BLRD-50-439/84 SECOND INTERIM REPORT The subject deficiency was initially reported to NRC-0IE Inspector P. E. Fredrickson on October 25, 1984 in accordance with 10 TR 50.55(e) as NCR 3511. The first interim report was subnitted on November 20, 1984.
Enclosed is our second interim report. We expect to subnit our next report on or about May 24, 1985. We consider 10 TR Part 21 applicable to this deficiency.
If you have any questions, please get in touch with R. H. Shell at FTS 858-2688.
Very trulv yours, TENNESSEE VALLEY AUTHORITY J. W. Hufham, Manager Licensing and Regulations Enclosure cc (Enclosure):
Mr. James Taylor, Director Office of Inspection and Enforcement U.S. Nuclear Regulatory Cmmission Washington, D.C.
20555 Records Center Institute of Nuclear Power Operations 1100 Circle 75 Parkway, Suite 1500 Atlanta, Georgia 30339 hhhhh[38 0
PDR CFilCIAL COPY An Equal Opportunity Employer J
r ENQ QSURE BELLEFONTE NUCLEAR PLANT UNITS 1 AND 2 VARIOUS IEFICIENCIE3 INVCLVItiG LANDA P0iER SUPPLIES BLRD-50-438/84-53, BLRD-50-439/84-49 NCR 3511 10 TR 50.55(e)
SECOND INTERIM REPORT r
l Description of Deficiency Various deficiencies have been identified with the Lambda power supplies installed in Bailey Controls Company (BCCo) cabinets at Bellefonte Nuclear Plant (BLN). The BCCo cabinets were supplied to TVA by Babcock and Wilcox (BW) on the NSSS contract for BLN.
The Lambda power supplies are components of the reactor protection syst em (HPS), engineered safety features actuation system l
(ESFAS), essential controls and instrmentation (ECI) system, and the rennuclear instrtmentation (NNI) system. The RPS, ESFAS, ECI, and NNI systems are primary safety-related systens which, among other essential functions, provide protection to the reactor core during a loss of coolant accident (LOCA), a steam line break, or a feedwater line break. The subject deficiencies involve missing components, loose connections, incorrectly sized capacitors, corroded transformers, and others.
Interim Progress TVA is still in the process of evaluating the deficiencies for the purpose of determining appropriate corrective action.
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