ML20050B156
| ML20050B156 | |
| Person / Time | |
|---|---|
| Site: | South Texas  |
| Issue date: | 03/26/1982 |
| From: | Oprea G HOUSTON LIGHTING & POWER CO. |
| To: | Jay Collins NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION IV) |
| References | |
| REF-PT21-82 10CFR-050.55E, 10CFR-50.55E, ST-HL-AE-810, ST-HL-AE-810E, NUDOCS 8204050053 | |
| Download: ML20050B156 (4) | |
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8 The Light C O m p a n y ii.,,-,,,u iin,,g&i,,m x
m n.,x iw>o ii.,,~,,,.m.x2m>oi aies.mii March 26, 1982 ST-HL-AE-810 SFN: V-0530 0
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Mr. John T. Collins s
Regional Administrator, Region IV 9;
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Nuclear Regulatory Comission 12 611 Ryaa P1aza Dr., Suite 1000 4
,ij Arlington, TX 76012
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Dear Mr. Collins:
g Ae South Texas Project Units 1 & 2 Docket Nos. STN 50-498, STN 50-499 Final Report Concerning the Lube Oil Strainer Basket for the Standby Diesel Generator On March 3,1982, Houston Lighting & Power Company (HL&P), pursuant to 10CFR50.55(e), notified your office of an item concerning the lube oil strainer basket on the standby diesel generator which is supplied by Cooper Energy Services. This item has previously been reported by Cooper Energy Services under the provisions of 10CFR21.
Attached is the Final Report which provides the corrective actions to be implemented.
If you should have any questions concerning this item, please contact Mr. Michael E. Powell at (713) 877-3281.
Very truly yours, 1
d..,b. "N,/
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t' Exec tive fice President MEP/blt Attachment S
<1 8204050053 820326 DR ADOCK 05000
Ilomion I.igliting & Power Cornpany cc:
G. W. Oprea, Jr.
J. H. Goldberg ST-HL-AE-810 J. G. Dewease SFN: V-0530 J. D. Parsons Page 2 D. G. Barker C. G. Robertson R. A. Frazar J. W. Williams J. W. Briskin J. E. Geiger R. L. Ulrey S. M. Dew J. T. Collins (NRC)
D. E. Sells (NRC)
W. M. Hill, Jr.
NRC)
M. D. Schwarz Baker & Botts)
R. Gordon Gooch Baker & Botts)
J. R. Newman Lowenstein, Newman, Reis, & Axelrad)
STP RMS Director, Office of Inspection & Enforcement Nuclear Regulatory Commission Washington, D. C. 20555 R. L. Range /G. W. Muench Charles Bechhoefer, Esquire Central Power & Light Company Chairman, Atomic Safety & Licensing Board P. O. Box 2121 U. S. Nuclear Regulatory Conmission Corpus Christi, Texas 78403 Washington, D. C.
20555 R. L. Hancock/G. Pokorny Dr. James C. Lamb, III City of Austin 313 Woodhaven Road P. O. Box 1088 Chapel Hill, North Carolina 27514 Austin, Texas 78767 J. B. Poston/A. vonRosenberg Mr. Ernest E. Hill City Public Service Board Lawrence Livermore Laboratory P. O. Box 1771 University of California San Antonio, Texas 78296 P. O. Box 808, L-46 Livermore, California 94550 Brian E. Berwick, Esquire William S. Jordan, III Assistant Attorney General Harmon & Weiss for the State of Texas 1725 I Street, N. W.
P. 0. Box 12548 Suite 506 Capitol Station Washington, D. C.
20006 Austin, Texas 78711 Lanny Sinkin Citizens for Equitable Utilities, Inc.
Citizens Concerned About Nuclear Power c/o Ms. Peggy Buchorn 5106 Casa Oro Route 1, Box 1684 San Antonio, Texas 78233 Brazoria, Texas 77422 Jay Gutierrez, Esquire Hearing Attorney Office of the Executive Legal Director V. S. Nuclear Regulatory Commission Washington, D. C.
20555 Revision Date 2-22-82
FINAL REPORT CONCERNING THE LUBE OIL STRAINER BASKET ON THE STANDBY DIESEL GENERATOR I.
Summary of Incident Cooper Engineering Services has identified to the NRC under the provisions of 10CFR21 that a defect exists in the strainer basket located in the lube oil strainer of the standby diesel generator. As one of the standby diesel genera-tors has been delivered to the site, this item of concern was reported by HL&P under the provisions of 10CFR50.55(e).
In perfonnance testing conducted at Cooper Energy Services it was identi-fied that the strainer mesh of the basket tears and would then be capable of passing through to the engine bearings.
If this were to occur, a bearing fail-ure could result and thus the unit would be incapable of performing as intended. As corrective action, a qualified strainer basket will be provided by Cooper Energy Services and installed as a replacement for the affected standby diesel generators.
II.
Description of the Incident On March 1,1982, HL&P received an internal memorandum from Bechtel Power Corporation (BPC) identifying that Cooper Energy Services had notified the NRC of a defect which existed in the strainer basket located in the lube oil strainer of the standby diesel generator. As detailed in the 10CFR21 notification transmitted by Cooper Energy Services to the NRC, the defect was identified through performance testing.
It was found that the mesh strainer basket was torn loose at the top of the basket where the perforated sidewall and liner were sandwiched between two flanges. The tests further identified that the strainer mesh disintegrates after it tears, and would be capable of passing through the engine bearings.
If this were to occur, a bearing failure would be probable and the unit would be incapable of perfonning as intended.
The letter also provided a recommended course of action for corrective action which entails the replacement of the defective basket with a new qualified basket design. HL&P has detennined that the proposed corrective action by Cooper Energy Services is an acceptable resolution for the South Texas Project (STP).
III. Corrective Action The corrective action will entail the replacement of the defective strainer basket with a qualified strainer basket for all affected standby diesel generators supplied by Cooper Energy Services to STP.
, IV.
Recurrence Control A recurrence control program is not considered necessary because the situation is unioue.
V.
Safety Analysis The Cooper Energy Services 10CFR Part 21 report safety consequences was assumed to be applicable to STP and no further safety analysis was per-formed by HL&P.