ML20098E517
| ML20098E517 | |
| Person / Time | |
|---|---|
| Site: | Bellefonte  |
| Issue date: | 09/17/1984 |
| From: | Mills L TENNESSEE VALLEY AUTHORITY |
| To: | James O'Reilly NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II) |
| References | |
| REF-PT21-84-460-000 NCR-2784, PT21-84-460, PT21-84-460-000, NUDOCS 8409280590 | |
| Download: ML20098E517 (2) | |
Text
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2,..g TENNESSEE VALLEY AUTHORITY-'
CHATTANOOGA. TENNESSEE 374ol 400 Chestnut Street Tower II
$$$tlebeP ti,, g4 BLRD-50-438/84-13 BLRD-50-439/84-12 U.S. Nuclear Regulatory Commission..
Region II-Attn:
Mr. James P. O'Reilly, Regional Administrator' 101 Marietta Street,.NW, Suite 2900 Atlanta, Georgia 30323
Dear Mr. O'Reilly:
BELLEFONTE NUCLEAR PLANT UNITS 1 AND 2 - NUMEROUS DEFICIENCIES ON E-MAX PANELS - BLRD-50-438/84-13, BLRD-50-439/84 FINAL REPORT The subject deficiency was initially reported to NRC-0IE Inspector P. E. Fredrickson on January 31, 1984 in accordance with 10 CFR 50.55(e) as NCR 2784. This was followed by our interim reports dated February 29, and May 25, 1984. Enclosed is our final report. We consider 10 CFR 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 L. M. Mills,IManager Nuclear Licensing Enclosure cc: 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.
8409280590 840917 OFFICIAL COPY PDR ADOCK 05000438 PDR I
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ENCLOSURE a5 BELLEFONTE NUCLEAR ' PLANT UNITS 1 AND 2 NUMEROUS DEFICIENCIE3 ON E-MAX PANELS BLRD-50-438/84-13, BLRD-50-439/84-12 NCR 2784 10 CFR 50.55(e)
FINAL REPORT Description of Deficiency Incorrect wiring connections have been identified on isolator cabinets manufactured for TVA for Bellefonte Nuclear Plant (BLN) by E-Max Instruments, Incorporated,-Englewood,' Colorado. The isolators provide physical separation and electrical isolation between class 1E and nonclass 1E circuits. Additionally, in crate A of isolator 1IX-ISOL-155-F, the module connector labeled 12B was missing. This nonconformance report (NCR) was determined to be significant based upon the repetitive NCRs which have been written against balance-of-plant -(BOP) isolator cabinets supplied by E-Max Instruments, Incorporated.
TVA has determined that the cause of the incorrect wiring deficiencies was an inacequate quality assurance (QA) program on the part of the
. vendor. Aaditionally, TVA's failure to perform source inspections on the subject equipment coula _ have, in part, resulted in the deficiencies not being identified before shipment.
The missing module connector was due to removal of the connector by a TVA' instrument mechanic without proper approval or documentation.
Safety Implications The incorrect wiring could not cause a failure of autonatic plant systems to mitigate a design basis accident. Howevec, an erroneous annunciation signal or instrument reading resulting f rom incorrect wiring could possibly lead to unnecessary and/or incorrect action /
inactions on the part of the operator. This could adversely affect the safe operativa of the plant.
Corrective Action TVA has removed and reconnected, per vendor drawinrd-ill wires found to be incorrectly connected. The missing module at + ator was determf' to be an extra and, as such, had no 4 t m,ted function.
Thus, it was not necessary to replace the er m Lov TVA has also determined that this deficiency does not app.... tc ather TVA nuclear plants, and has not occurred for BLN cn any suosequent contracts with E-Max Instruments, Incorporated.
TVA's QA personnel have worked with E-Max Instruments, Incorporated, to improve the vendor QA program as documented in TVA Audit Report No.
DB1-V-0054. Additionally, TVA's Quality Engineering Branch has been instrupted to not waive source inspections without concurrence from the responsible technical engineer per TVA's Division of Engineering Design (EN DES)
Engineering Procedure (EP) 5.43 These actions will prevent recurrence of this deficiency.
TVA considers the unauthorized removal of the module connector to be an isolated occurrence. TVA has adequate procedures in place to
. control the maintenance and removal of plant equipment. The individual responsible for the removal is no longer employed by TVA.
Thus, no action to prevent recurrence is necessary.
.