ML20030B575
| ML20030B575 | |
| Person / Time | |
|---|---|
| Site: | Wolf Creek, Cooper, Arkansas Nuclear, River Bend, Waterford, South Texas, Comanche Peak, Fort Calhoun, Fort Saint Vrain  |
| Issue date: | 08/05/1981 |
| From: | Seyfrit K NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION IV) |
| To: | ARKANSAS POWER & LIGHT CO., GULF STATES UTILITIES CO., HOUSTON LIGHTING & POWER CO., KANSAS GAS & ELECTRIC CO., LOUISIANA POWER & LIGHT CO., NEBRASKA PUBLIC POWER DISTRICT, OMAHA PUBLIC POWER DISTRICT, PUBLIC SERVICE CO. OF COLORADO, TEXAS UTILITIES ELECTRIC CO. (TU ELECTRIC) |
| References | |
| NUDOCS 8108180303 | |
| Download: ML20030B575 (2) | |
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4 UNITED STATES
~ 3, NUCLEAR REGULATORY COMMISSION 3'
,I REGION IV 611 RY AN PLAZA DRIVE, SulTE 1030 Q
g ARLINGTON, TEXAS 76011
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4 to to Gentlemen:
The enclosed IE Information Notice provides early notification of an event that may have safety significance. Accordingly, you should review the infonnation notice for possible applicability to your facilities.
No specific action or response is requested at this time; however, contin,7nt upon the results of further staff evaluation, a bulletin or a circular recsm-mending or requesting specific licensee actions may be issued.
If you have any questions regarding this matter, please contact this office.
Sincerely,
-f'f rit, -
u Kar ey Director v
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Enclosures:
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IE Information Notice No. 81-24 2.
List of Recently Issued IE Infonnation Notices I
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IE INFORMATION NOTICE 81-24 WAS SENT TO THE FOLLOWING LISTED LICENSEES I
Licensee Facility / Docket Number 4
Arkansas Power and Light Conpany Arkansas Nuclear One, Unit 1 & 2 Little Rock, Arkansas 50-313; 50-368 Nebraska Public Power District Cooper Nuclear Station Columbus, Nebraska 50-298 Omaha Public F _ner District Fort Calhoun Station Omaha, Nebraska 50-285 Public Service Company of Colorado Fort St. Vrain Generating Station Denver, Colorado 50-267 Gulf States Utilities River Bend Beaumont, Texas 50-458; 50-459 Houston Lighting & Power Company South Texas Project Houston, Texas 50-498; 50-499 Kansas Gas & Electric Company Wolf Creek Wichita, Kansas STN 50-482 Louisiana Power & Light Company Waterford-3 New Orleans, Louisiana 50-382 Texas Utilities Generating Company Comanche Peak Steam Electric Station Dallas, Texas 50-445; 50-446 i
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SSINS No.: 6835 Accession No.:
810720003 IN 81-24 UNITEn STATES NUCLEAR REGULATORY COMMISSION OFFICE OF INSPECTION AND ENFORCEMENT WASHINGTON, D.C.
20555 IE Information Notice No. 81-24 August 5, 1981 Page 1 of 1 AUXILIARY FEED PUMP TURBINE BEARING FAILURES Description of Circumstances:
During an inspection of one auxiliary feed pump inboard turbine journal bearing to determine the cause of dirty oil, Baltimore Gas and Electric Company found the bearing damaged.
The other auxiliary feed pump turbines were disassembled and similar damaga was fourd on all inboard journal bearings.
The turbines are Terry Turbine type GS-2.
Bearing lubrication is accomplished by oil ring pick-up from reservoirs at either end of the turbine.
Each reservoir is fitted with a sight glass about three inches long to monitor oil level.
The damage has been attributed to a failure to maintain oil level within a narrow operating range (approximately 1/4-inch) within the sight glass.
A similar instance of bearing failure was discovered by Northeast Utilities during an inservice inspection of the turbine bearings at Millstone Unit 2.
Both facilities reporting the bearing failures have tie Terry Turbine type GS-2 where bearing lubrication is supplied by oil ring pick-up only.
The corrective actions taken have been to clearly mark the maximum and minimum allowed oil levels on the sight glass.
A spot check of other facilities using Terry Turbines in PWR and BWR appli-cations has revealed that the Terry Turbine types GS-2 and GS-1 can have a combination of force feed and oil ring pick-up lubrication.
In these applications, the oil ring pick-up supplies lubrication during startup and coastdown of the turbine.
A check of the Technical Marual has shown that proper oil level range for the oil ring pick-up was not addressed.
- However, the level should be maintained within a narrow range to provide adequate lubrication during startup and coastdown.
No written response to this information is required.
If you need additional information regarding this matter, please contact the Director of the appro-priate NRC Regional Office.
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IE Information Notice No. 81-21 August 4, 1981 LISTING OF RECENTLY ISSUED IE INFORMATION NOTICES Information Subject Date Issued To Notice No.
Issued 81-16 Control Rod Drive System 4/23/81 All power reactor Malfunctions facilities with an Operating License (OL) or Construction Permit (CP) 81-18 Excessive Radiation 6/23/81 Specified licensees Exposures to the Fingers of holding byproduct Three Individuals Incurred licenses During Cleaning and Wipe Testing of Radioactive Sealed Sources at a Sealed-Source Manufacturing Facility 81-19 Lost Parts in Primary 7/6/81 All power reactor Coolant System facilities with an Operating License (OL) or Construction Permit (CP) 81-20 Test Failures of Electrical 7/13/81 All power reactor Penetration Assemblies facilities with an Operating License (0L) or Construction Permit (CP) 81-21 Potential Loss of Direct 7/21/81 All power reactor Access to Ultimate Heat holding an Operating Sink License (OL) or Construction Permit (CP) 81-22 Section 235 and 236 7/31/81 All power research reactor, Amendments to the fuel fabrication and repro-Atomic Energy Act cessing, and spent fuel of 1954 storage licensees and applicants 81-23 Fuel Assembly Damaged 8/4/81 All power reactor due to Improper Positioning facilities with an of Handling Equipment Operating License (0L) or Construction Permit (CP)
Enclcsure
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