TXX-4101, Interim Deficiency Rept Re Defective Delaval Piston Skirt Castings for Diesel Generators.Piston Skirt Castings Will Be Replaced W/Casting Provided by Supplier by May 1984
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| ML20080H812 | |
| Person / Time | |
|---|---|
| Site: | Comanche Peak  |
| Issue date: | 01/30/1984 |
| From: | Gary R TEXAS UTILITIES ELECTRIC CO. (TU ELECTRIC) |
| To: | Johnson E NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION IV) |
| References | |
| SDAR-99, TXX-4101, NUDOCS 8402140333 | |
| Download: ML20080H812 (2) | |
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|---|---|
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TEXAS UTILITIES GENERATING COMPANY MKYWAY TOWElf
- 400 NotrlIt OI.IVE M1HEET, I..II. MI
- DAI.I.AM, TEXAM T32pl R.J. GARY o..,.......... January 30,_1984 _ _._... _ . _ .-
TXX-4101 's
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FEB - 6 gg Mr. E. H. Johnson, Chief Reactor Project Branch 1 N U.S. Nuclear Regulatory Commission Office of Inspection and Enforcement 611 Ryan Plaza Drive, Suite 1000 Docket Nos.: 50-445 Arlington, TX 76012 50-446 COMANCHE PEAK STEAM ELECTRIC STATION DEFECTIVE PISTON SKIRT CASTINGS QA FILE: CP-82-15; SDAR 99 FILE N0.: 10110
Dear Mr. Johnson:
In accordance with 10CFR50.55(e), we are submitting the enclosed report of actions taken to correct a deficiency regarding defective piston skirt castings for the Unit 2 diesel generators.
Supporting documentation is available at the CPSES site for your Inspector's review.
Very truly yours, RJG:In cc: hRC Region IV - (0 + 1 copy)
Director, Inspection & Enforcement (15 copies)
U.S. Nuclear Regulatory Commission Washington, DC 20555 8402140333 840130 PDR ADOCK 05000446 S PDR a unruMson or rexAs n rsursen es.scrase couvAxv 3 E -X]
n
. : 'TXX-4101 January 30, 1984 ATTACHMENT DEFECTIVE PISTON SKIRT CASTINGS Description The supplier (Delaval) has advised us that the piston skirt castings for the lhit 2 diesel generators are defective. As a result of additional residual stress imposed from the heat treatment methods
' employed froni December 1978 to October 1981, the castings could crack under normal operating conditions.
Safety Analysis In the event the defect had not been corrected, the engines could fail in operation and render the diesel generators inoperable.
Corrective Actions Thc; piston skirt castings will be replaced with castings provided by the supplier. The replacements should be received no later than May, 1984. The installation will be completed prior to preoperational testing.of the engines.
.