ML20027D328
| ML20027D328 | |
| Person / Time | |
|---|---|
| Site: | Bellefonte  |
| Issue date: | 10/26/1982 |
| From: | Mills L TENNESSEE VALLEY AUTHORITY |
| To: | James O'Reilly NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II) |
| References | |
| REF-PT21-82 10CFR-050.55E, 10CFR-50.55E, NUDOCS 8211040136 | |
| Download: ML20027D328 (2) | |
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TENNESS'EE V LLEY AUTHORITY p
CH ATTANOOGA. TENNESSEE 37401 400 Chestnut Street Tower II October 26, 1982 BLRD-50-438/82-30 BLRD-50-439/82-27 l
s U.S. Nuclear Regulatory Commission
. c, Region II ro
- ip_3 Attn
Mr. James P. O'Reilly, Regional Administrator 9
pz 101 Marietta Street, Suite 3100 1
z:0 Atlanta,-- Georgia 30303
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Dear Mr. O'Reilly:
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6
'c TJ Bl!LLEFONTE NUCLEAR PLANT UNITS 1 AND 2 - DEFECTS IN RPS AND ESFAS MODULES.
n2 SUPPLIED BY BAILEY M!lTER COMPANY - BLRD-50-438/82-30, BLRD-50-439/82-27 eo THIRD INTERIM REPORT c
i
- The subject deficiency was. initially reported to NRC-0IE Inspector
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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.
3 elated NCR 1860 was also determined to be reportable in accordance with 10 CFR 50.55(e). This was followed by our second interim report dated.
August 10, 1982. Enclosed is our third interim report. We expect to submit our next report by January 5, 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. J. Shell.at FTS 858-2688.
- Very truly yours, TENNESSEE VALLEY. AUTHORITY
\\
L. M. Mills, Manager-Nuclear Licensing Enclosure h
cc:
.Mr. Richard C. DeYoung, Director (Enclosure)
Office of Inspection and Enforcement U.S. Nuclear Regulatory Connission Washington, D.C.
.20555 Mr. James McFarland (Enclosure)
Senior Projoct Manager Babcock & Wilcox Company P.O. Box 1260 Lynchburg, Virginia 24505 wmesco7'd 8211040136 821026 P-PDR ADOCK 05000438
'- h S
PDR An Equal Opportunity Employer
ENCLOSURE BELLEFONTE NUCLEAR PLANT UNITS 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)
THIRD 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 (ESEAS). These brackets have stress fractures and show evidence of having been glued. This deficiency was discov.ered 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 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, Ohio, a subcontractor of Babcock and Wilcox.
Interim Progress TVA is still in the process of evaluating the subject deficiency. The recommended disposition being provided by Babcock and Wilcox has not been received yet. TVA will determine what corrective actions are necessary after receipt of Babcock and Wilcox's recommendations.
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