ML20010A258
| ML20010A258 | |
| Person / Time | |
|---|---|
| Site: | Humboldt Bay, Palo Verde |
| Issue date: | 08/05/1981 |
| From: | Engelken R NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION IV) |
| To: | Van Brunt E ARIZONA PUBLIC SERVICE CO. (FORMERLY ARIZONA NUCLEAR |
| Shared Package | |
| ML20010A250 | List: |
| References | |
| NUDOCS 8108110241 | |
| Download: ML20010A258 (1) | |
Text
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UNITED STATES E
~3 NUCLEAR REGULATORY COMMISSION
,E REGION V e
g 1990 N. CALIFORNIA BOULEVARD j
U SUITE 202, WALNUT CREEK PLAZA -
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- e,, e *o WALNUT CREE K, CALIFORNIA 94594 August 5, 1981 Docket Nos. 50-528, 50-529, 50-530 Arizona Public Service Company P. O. Box 21666 Phoenix, Arizona 85036 Atter. tion: Mr. E. E. Van Brunt, Jr.
Vice President, Nuclear Projects Gentlemen:
The enclosed information notice provides early notification of an event that may have safety significance. Accordingly, you should review the.information notice for possible applicability to your facility.
No specific action or response is requested at this time; however, contingent upon the results of further staff evaluation, a bulletin or a circular recom-mending or requesting specific licensee actions may be issued.
If you have any questions regarding this matter, please contact this office.
Sincerely, l
i wd-l R. H. Engelken Director
Enclosures:
- 1..IE Infonnation Notice No. 81-24 2.
List of IE Information Notices Recently Issued cc w/ enclosures:
F. W. Hartley, APS l
'8108110241 810805 PDR ADOCK 05000133 0
l l
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SSINS No.: 6835 Accession No.:
' m $to7AT$003 IN 81-24 UNITED. STATES NUCLEAR REGULATORY COMMISSION OFFICE OF INSPECTION'AND ENFORCEMENT WASHINGT0t!, D.C.
20555
' August 5,~ 1981' IE INFORMATION NOTICE NO. 81-24: " AUXILIARY FEED PUMP 1URBINE 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.
1he other auxiliary feed pump turbines were disassembled and similar damage was found 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 duri.ng an inservice inspection of the turbine bearings at Millstone Unit 2.
Both facilities reporting the bearing failures have the 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 Manual ha 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 & coastdown.
No written response to this infomation is required.
If you need additional information regarding this matter, please contact the Director of the appro-priate NRC Regional Office.
Attachment:
Recently issued IE Infomation Notices
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Attachment IN 81-24 August 5, 1981 RECENTLY ISSUED IE INFORMATION NOTICES Infonnation Date of Notice No.
Subject Issue Issued to 81-23 Fuel Assembly Damaged 8/4/81 All power reactor due to Improper Positioning facilities with an of' Handling Equipment OL or CP Sec' ion 235 and 236 7/31/81 All power research 81-22 t
' Am'endments to the reactor, fuel Atomic Energy Act fabrication and
.of'1954 reprocessing, and
~
spent fuel storage licensees and 4
D applicants t e.-
81-21
, Po'tential: Loss of Dire'ct c - 37/21/81 All power reactor
. Access ~ to Ul timate Heat Sink facilities with an OL or CP 81-20
. Test [ailures o'f Electrical 7/13/81 All power reactor Penetration Assemblies facilities with an OL or CP 81-19 Lost Parts in Primary 7/6/81 All power reactor Coolant System facilities with an
~
OL or CP 81-18 Excessive Radiation 6/23/81 Specified licensees Exposures to the Fingers of holding byproduct Three Individuals Incurred licenses l
During Cleaning and Wipe Testing of Radioactive i
Sealed Sources at a Sealed-Source Manufacturing Facili ty i
81-16 Control Rod D;ive System 4/23/81 All BWR facilities l
Malfunctions with an OL or CP i
81-15 Degradation of Automatic 4/22/81 All power reactor ECCS-Actuation Capability facilities with an l
L by Isolation of Instrument OL or CP Lines i
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OL = Operating Licenses CP = Construction Permits
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