ML20052C167
| ML20052C167 | |
| Person / Time | |
|---|---|
| Site: | Bellefonte  |
| Issue date: | 04/22/1982 |
| 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, NCR-1725, NRC-1725, NUDOCS 8205040450 | |
| Download: ML20052C167 (2) | |
Text
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USt4RCE hh VALLEY AUTHORITY LT' C H A TT A NGrv, A T E N N F45FF ' MC1 0Og(stnutStreetTowerII N
April 22, 1982 BLRD-50-438/82-27 BLRD-50-439/82-24 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 - INSOLUBLE GLUE USED FOR PURGE DAMS IN STAINLESS STEEL PIPING - BLRD-50-438/82-27, BLRD-50-439/82 FIRST j
INTERIM REPORT The subject deficiency us initially reported to NRC-0IE Inspector R. V.'Crlenjak on March 22, 1982 in accordance with 10 CFR 50.55(e) as NCR 1725. Enclosed is our first interim report. We expect to submit our next report by June 21, 1982.
If you have any questions concerning this matter., please get in touch with R. H. Shell at FTS 858-2688.
.I Very truly yours, i
TENNESSEE VALLEY AUTHORITY D
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p ENCLOSURE BELLEFONTE NUCLEAR PLANT UNITS 1 AND 2 INSOLUBLE GLUE USED FOR PURGE DAMS IN STAINLESS STEEL PIPING NCR 1725 BLRD-50-438/82-27, BLRD-50-439/82-24
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FIRST INTERIM REPORT Description of Deficiency Some glue used in installation of purge dams in stainless steel piping has
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proved insoluble during flushing activities, and minor glue residual rcmains in piping at purge dam locations. This problem was anticipated
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identified as Elmers Glue-All used before nonconformance report (NCR) 835 and Elmers School Glue that has been affected by heat from welding activities. When purge dams are located too close to the welds, the currently used and normally soluble Elmers School Glue will char and become insoluble.
Interim Progress The disposition of NCR 835 directed discontinuing the use of Elmers Glue-All and recommended using Elmers School Glue. A minimum distance between welds and purge dams will be specified in order to prevent charring of the Elmers School Glue.
TVA's Singleton Laboratory has performed chemical analyses on glue residual removed or flushed from several systems. These analyses are currently being evaluated for what (if any) harmful effects the glue may have on stainless steel piping. The potential for harmful effects of glue residual breaking loose during plant operation is also being evaluated.
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