ML20052H908
| ML20052H908 | |
| Person / Time | |
|---|---|
| Site: | Byron, Braidwood, 05000000 |
| Issue date: | 05/11/1982 |
| From: | Tramm T COMMONWEALTH EDISON CO. |
| To: | James Keppler NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION III) |
| References | |
| 10CFR-050.55E, 10CFR-50.55E, 4079N, NUDOCS 8205240167 | |
| Download: ML20052H908 (2) | |
Text
~
c Commonwealth Edison one First N
- tion 11 Plan, Chic:po. Illinois 7 Addr:ss R: ply to: Post Office Box 767
,/ Chicago lilinois 60690 s
May 11, 1982 Mr. Jame s G. Keppler, Regional Administrator Directorate o f Inspection and Enforcemen t - Region III U.S. Nuclear Regulatory Commission 799 Roosevelt Road Glen Ellyn, IL 60137
Subject:
Byron Station Units 1 and 2 Braidwood Station Units 1 and 2 Diesel Generator Strainer Basket Defect NRC Docket Nos. 50-454, 50-455, 50-456 and 50-457 Reference (a):
February 1, 1982, letter from F. B. Stolba, Cooper Energy Services and Enforcement, NRC
Dear Mr. Keppler:
On April 23, 1982, L. Bowen o f Commonwealth Edison reported to J.
Neisler o f your of fice a defect in the Byron /Braidwood diesel generator lube oil strainers.
This defect is reportable pursuant to 10 CFR 50.55(e).
In accordance with a request from Region III, con-trol numbers 82-01 and 82-02 are assigned to this report for Byron and Braidwood Stations, respectively.
Description o f De ficiency Cooper Energy Services has advised the NRC (reference (a)) and Commonwealth Edison that the emergency diesel generators at Byron and Braidwood each contain a defective strainer basket located in the lube oil strainers.
After performance testing the mesh strainer basket liner was found to be torn loose at the top o f the basket where the perforated sidewall and the liner were sandwiched between two flanges.
Safety Implications Recer' testing indicates that the strainer mesh disintegrates after it tears and could then pass through the engine bearings.
If this were to occur, one or more engine bearings would probably fail and the unit would be incapable o f performing.
8205240167 820511 1
PDR ADOCK 05000454 MAY 17 E04 S
PDR gg
o J. G. Keppler May 11, 1982 Corrective Action A new basket has been designed and tested.
It will be installed in all eight Byron /Braidwood diesels prior to fuel load.
Please address further questions regarding this matter to this office.
Very truly yours, f,[4u==
T. R.
Tramm Nuclear Licensing Administrator 1m cc:
Director of Inspection & En forcement 4079N
.