ML20113E019
| ML20113E019 | |
| Person / Time | |
|---|---|
| Site: | Bellefonte  |
| Issue date: | 03/05/1985 |
| From: | Hufham J TENNESSEE VALLEY AUTHORITY |
| To: | Grace J NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II) |
| References | |
| REF-PT21-85, REF-PT21-85-219-000 NCR-3527, PT21-85-219, PT21-85-219-000, NUDOCS 8504160147 | |
| Download: ML20113E019 (2) | |
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0 TENNESSEE VALLEY AUTHORITY CHATTANOOG A. TENNESSEE 374ol 400 Chestnut Street Tower II 85 MM 8 All d 5, 1985 Bm50438/8u2 BLRD-50-439/8448 U.S. Nuclear Regulatory Canmission Region II Attn:
Dr. J. Nelson Grace, Regional Adninistrator 101 Marietta Street, NW, Suite 2900 Atlanta, Georgia 30323
Dear Dr. Grace:
BELLEFmTE NUCLEAR PLANT INITS 1 AND 2 - DEESCIIVE WIRING CONNECTINS IN AINA MOTOR TERATORS - BLRD-50-438/84-52 AND BLRD-50-439/84 FINAL REPORT The subject deficiency was initially reported to NRC-0IE Inspector P. E. Fredrickson on October 12, 1984 in accordance with 10 TR 50.55(e) as NCR 3527 The first interim report was submitted November 7,1984. Enclosed is our final report. 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 truly yours, TENNESSEE VALLEY AUTHORITY 4 J. W. Hufham, Manager Licensing and Regulations Enclosure cc:
Mr. James Taylor, 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 8504160147 850305 PDR ADOCK 05000438 g
PDR An Equal Opportunity Employer g
ENQ,0SURE BELLEFCETE NUCLEAR PLANT UNITS 1 AND 2 DEFECrlVE WIRING CONNECTIONS IN AlNA MOTOR OPERATORS BLRD-50-438/84-52, BLRD-50-439/84-48 10 CFR 50.55(e)
NCR 3527 FINAL REPORT Description of Deficiency A condition was identified at Bellefonte Nuclear Plant (BLN) in which vendor-installed wires had fallen out of their respective terminal lugs on the motor operators for valves 1-KE-IFCV-056-B and 1-KE-IFCV-537-B.
Further investigation has revealed that a variety of deficiencies exist with the vendor wiring connections in the motor operators of all 16 of the essential raw cooling water (EBCW) system strainer backwash valves. These deficiencies include bad or incomplete crimps, wrong terminal lug sizes, misapplication of crimping tools, and improper insertion of wire into terminal barrels.
The affected valves are located in the intake pumping station (IPS) at BLN.
There are eight valves per unit. The valves and motor operators were supplied to TVA by the Jamesbury Corporation, Worcester, Massachusetts. The motor operators were manufactured by Ama Actmtors, Incorporated, Germany.
Safety Irnplications I
These deficiencies could result in a failure of the affected motor operators to function as required, and subsequently, could result in a failure of the ERCW strainer backwash valves to operate. The backwash valves are required to maintain the ERCW strainers $n an unclogged condition in order to pass an adequate amount of ERCW flow.
,ailure of the valves to operate could result in a loss of ERCW flow due to c ogged strainers. Since the ERCW system is the ultimate heat sink for the plant, this condition could adversely affect the safe operation of the plant.
Corrective Action All the terminations of the 16 affected valves on the subject nonconformance report (NCR) have been replaced and recrimped by representatives of Ama.
This rework was completed at BLN under the observance of BLN quality control pers onnel.
Ama has informed TVA that the inadequate terminations were an isolated occurrence and the personnel that performed the terminations are ro longer employed by Ama.