ML20054D082
| ML20054D082 | |
| Person / Time | |
|---|---|
| Site: | Perry  |
| Issue date: | 04/15/1982 |
| From: | Davidson D CLEVELAND ELECTRIC ILLUMINATING CO. |
| To: | James Keppler NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION III) |
| References | |
| 10CFR-050.55E, 10CFR-50.55E, NUDOCS 8204220320 | |
| Download: ML20054D082 (2) | |
Text
P THE CLEVELAND ELECThlC lLLUMIN ATING COMPANY P O. DOX 5000 e CLEVELANo, OHIO 44101 e TELEPHONE (216) 622-9800 o ILLUMINATING BLDG.
e 55 PUBLIC SoUARE
- 9 Datwyn R. Davidson VICE PRE SIDENT SYSTEM ENGINEERING AND CONSTRUCTION April 15, 1982 e
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Mr. James G. Keppler
,ch Director, Region III e i [h Office of Inspection and Enforcement c5
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US Nuclear Regulatory Commission
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'Au 799 Roosevelt Road b
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b' Glen Ellyn, Illinois 60137 RE: Perry Nuclear Power ant Docket Nos. 50-440; 50-441 Final Report on Lubricating Oil System Defect in Standby Diesel Generators (RDC 24(81))
Dear Mr. Keppler:
This letter serves as the Final Report required by 10CFR50.55(e) concerning the potential lubricating oil system defect on standby diesel generators, model DSRV16, supplied by Transamerica Delaval.
This was first reported to Mr. R. B.
Landsman of your office on December 30, 1980, by Mr. W. J. Kacer of the Cleveland Electric Illuminating Company (CEI). Our Interim Report on this subject was filed on January 27, 1981, and a subsequent letter dated October 22, 1981, also concerned this deficiency.
This report contains a description of the deficiency, an analysis of the safety implication, and the corrective action taken.
DESCRIPTION OF DEFICIENCY Transamerica Delaval is supplying four (4) diesel generator units (Model DSRV16) for the Perry Nuclear Power Plant (PPPP) that will be used as a standby power source for the PNPP. On December 16, 1980, Transamerica Delaval notified the Nuclear Regulatory Commission under 10CFR21 that a potential defect had been
/ identified concerning lubrication of the thrust bearings of the turbochargers.
This notification was transmitted to CEI by their letter dated December 22, 1980.
The turbochargers for the generators were manufactured by the Elliott Company of Jeannette, Pennsylvania. They were installed on the engines by Transamerica Delaval and lubricated in accordance with Elliott Company recommendations. The reported defect exists in the lubricating oil system that supplies oil to the turbocharger bearings. The design of the system permits lubricating oil to flow to the bearings only when the engine is running and prevents. oil flow to the 8204220320 G20415 PDR ADOCK 05000440 PDR S
APR 19 M
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r Mr. James G. Keppler April 15, 1982 bearings when the engine is in the standby mode.
The oil seal of the turbocharger is a labyrinth type and is only effective when the turbocharger is running.
Because of the possibility of seal leakage when the turbocharger is not running (engine standby mode), the turbocharger lubricating oil system is bypassed at this time. The turbocharger thrust bearings may experience rapid wear because of this lubricating system which may result in engine non-availability.
Currently, the diesel generators are set in place at PNPP with pre-engine start testing now tentatively scheduled for December, 1982.
ANALYSIS OF Tile SAFETY IMPLICATIONS Excessive thrust bearing wear, due to inadequate lubrication, could affect engine availability and thus affect the availability of standby A.C. power supply.
Design Criterion 17 of Appendix A to 10CFR50 and Section 8.3.1.1.4 of the PNPP PSAR require an available standby A.C. power supply to provide for safe shut down of the reactor and to maintain the plant in a safe condition.
CORRECTIVE ACTION The turbocharger lube oil system will be modified so that the turbocharger thrust bearings receive adequate oil during pre-lubing. This modification will also insure that the turbocharger is not overlubed.
Delaval has completed this modification design, and has supplied us with the technical information and parts list.
Installation of these parts to complete the modification will be performed, under the direction of a Delaval Represen-tative, after installation of the diesel engines is completed, and prior to pre-engine start testing.
Sincerely, bI
/
Dalw R. Davidson Vice President System Engineering and Construction cc:
Mr. M. L. Gildner NRC Resident Inspector - PNPP Director, Inspection and Enforcement US Nuclear Regulatory Commission Washington, DC 20555 US Nuclear Regulatory Commission c/o Document Management Branch Washington, DC 20555