ML20062J234
| ML20062J234 | |
| Person / Time | |
|---|---|
| Site: | Bellefonte  |
| Issue date: | 08/10/1982 |
| 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 8208160307 | |
| Download: ML20062J234 (2) | |
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TENNESSEE VALLEY AUTHORITY CH ATTANOOGA. TENNESSEE 374ot 400 Chestnut Street Tower II August 10, 1982 BLRD-50-438/82-30 h
BLRD-50-439/82-27 2
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U.S. Nuclear Regulatory Commission
-u Region II
- M Attn:
Mr. James P. O'Reilly, Regional Administrator I'
101 Marietta Street, Suite 3100 Atlanta, Georgia 30303
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Dear Mr. O'Reilly:
BELLEFONTE NUCLEAR PLANT UNITS 1 AND 2 - DEFECTS IN RPS AND ESFAS MODULES SUPPLIED BY BAILEY ETER COMPANY - BLRD-50-438/82-30, BLRD-50-439/82 SECOND 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). Enclosed is our second interim report. We expect to submit our next report by October 29, 1982. 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 o SW g L. M. Mills, Manager i
f Nuclear Licensing Enclosure i
cc:
Mr. Richard C. DeYoung, Director (Enclosure)
Office 'of Inspection and Enforcement U.S.' Nuclear Regulatory Commission Washington, DC 20555 i
Mr. James McFarland (Enclosure)
Senior Project Manager Babcock & Wilcox Company P.O. Box 1260 Lynchburg, Virginia 24505 C0dd ggtCN
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8208160307 820810
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DR ADOCK 05000 An Equal Opportunity Emotoyer
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ENCLOSURE BELLEFONTE NUCLEAR PLANT UllITS 1 AND 2 DEFECTS IN RPS AND ESFAS MODULES SUPPLIED BY BAILEY METER COMPANY NCR'S 1795 AND 1860 BLRD-50-438/82-30, BLRD-50-439/82-27 10 CFR 50.55(e)
SECOND INTERIM 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 (ESFAS). 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.
Subsequent inspection has identified (NCR 1860) additional problems 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 24 AW6 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, Ohio, a subcontractor of Babcock and Wilcox.
Interim Progress TVA has sent NCR 1795 to Babcock & Wilcox for their review and recommended disposition and is awaiting B&W's reply. TVA is in the process of sending NCR 1860 to B&W for their review. Upon receipt of B&W's recommendations, TVA will determine appropriate corrective action.