ML20028C491
| ML20028C491 | |
| Person / Time | |
|---|---|
| Site: | Bellefonte  |
| Issue date: | 01/03/1983 |
| From: | Mills L TENNESSEE VALLEY AUTHORITY |
| To: | James O'Reilly NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II) |
| References | |
| REF-PT21-83 10CFR-050.55E, 10CFR-50.55E, NUDOCS 8301100268 | |
| Download: ML20028C491 (2) | |
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0 TENNESSEE VALLEY AUTHORITY CH ATTANOOG A. TENNESSEE 37401 c--
400 Chestnut Street Tower II 5
40 January 3, 1983 n
BLRD-50-438/82-30 cc BLRD-50-439/82-27 w
cn U.S. Nuclear Regulatory Commission Region II Attn:
Mr. James P. O'Reilly, Regional Administrator 101 Marietta Street, Suite 3100 Atlanta, Georgia 30303
Dear Mr. O'Reilly:
BELLEFONTE NUCLEAR PLANT UNITS 1 AND 2 - DEFECTS IN RPS AND ESFAS MODULES SUPPLIED BY BAILEY METER COMPANY - BLRD-50-438/82-30, BLRD-50-439/82 FOURTH INTERIM REPORT The subject deficiency was initially reported to NRC-0IE Inspector J. Bryant on April 14, 1982 in accordance with 10 CFR 50.55(e) as NCR 1795. This was followed by our first interim report dated May 11, 1982.
Related NCR 1860 was also determined to be reportable in accordance with 10 CFR 50.55(e). This was followed by our interim reports dated August 10 and October 26, 1982. Enclosed is our fourth interim report. We expect to submit our next report by June 1, 1983 We consider 10 CFR Part 21 applicable to this deficiency.
If you have any questions concerning this matter, please get in touch with R. H. Shell at FTS 858-2688.
Very truly yours, TENNESSEE VALLEY AUTHORITY L. M. Mills, Manager Nuclear Licensing Enclosure cc:
Mr. Richard C. DeYoung, Director (Enclosure)
Office of Inspection and Enforcement U.S. Nuclear Regulatory Commission Washington, D.C.
20555 Mr. James McFarland (Enclosure)
Senior Project Manager Babcock & Wilcox Company P.O. Box 1260 Lynchburg, Virginia 24505 8301100268 830103 OFFTCTA1 COpv PDR ADOCK 05000438 S
PDR W" 6 '> ]
An Equal Opportunity Emplover
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ENCLOSURE BELLEFONTE NUCLEAR PLANT UNITS 1 AND 2 DEFECTS IN RPS AND ESFAS MODULES SUPPLIED BY BAILEY MilTER COMPANY NCR'S 1795 AND 1860 BLRD-50-438782-30, BLRD-50-439/82-27 10 CFR 50.55(e)
FOURTH IlffERIM REPORT Description of Deficiency Nonconformance report (NCR) 1795 deals with connector and support brackets for the printed subcircuit boards in the plug-in modules of the Reactor Protection System (RPS) and the Engineered Safety Features Actuation System l
(ESEAS). These brackets have stress fractures and show evidence of having been glued. This deficiency was discovered during routine surveillance inspection of the modules. Approximately 500 connector and support bracket assemblies are involved. The same problem has also been found in the non-Class IE Protection System Auxiliary Cabinets.
i Subsequent inspection has identified additional problems (NCR 1860) with approximately 150 modules in the RPS and ESFAS that have built-in indicators, both flow and temperature type. In these type modules, there is a general distribution of built-in indicators which have cracked housings, loose terminals, damaged terminal studs, improper size terminals used on 24AW6 wire, and generally poor quality crimps.
The apparent cause of the deficiencies detailed in both NCRs is poor assembly by the module manufacturer, Bailey Meter Company of Kendrick, j
1 Ohio, a subcontractor of Babcock and Wilcox.
Interim Progress B&W has completed their evaluation of the deficiency described in NCR 1795. Bailey Controls Company (B&W's subvendor) stated that cracking 1
of the polycarbonate connector / support brackets is a known phenomenon resulting from the manufacturing process and does not compromise the structural integrity of the device. They recommend using these components as is and offered to replace those connectors which contain defects beyond the " crazing" cited in their response.
TVA has reviewed the recommended disposition and provided B&W with two options for resolving the noncomforming condition. B&W was requested to (1) replace those components which are broken and those which show signs of repair and evaluate the balance of the components on an item-by-item basis and replace those which have defects beyond the
" crazing" cited by Bailey, or (2) replace all the components in i
question. TVA is awaiting B&W's reply.
TVA is also awaiting B&W's recommended disposition to NCR 1860. TVA will determine what corrective actions are necessary after receipt of B&W's recommendations.
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