ML18136A027
| ML18136A027 | |
| Person / Time | |
|---|---|
| Site: | Surry, North Anna  |
| Issue date: | 09/26/1979 |
| From: | James O'Reilly NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II) |
| To: | Proffitt W VIRGINIA POWER (VIRGINIA ELECTRIC & POWER CO.) |
| References | |
| NUDOCS 7910040189 | |
| Download: ML18136A027 (5) | |
Text
e I
e UNITED STATES NUCLEAR REGULATORY, COMMISSION REGION II,*
101 MARIETTA ST., N.W., SUITE 3100 ATLANTA, GEORGIA 30303 Virginia Electric and Power Company Attn:
W. L. Proffitt Senior Vice President, Power P.O. Box 26666 Richmond, Virginia 23261 Gentlemen:
SEP 2 6 1979 The enclosed Information Notice provides information with regard to failures of lube oil coolers for emergency diesel generators.
Enclosures:
- 1.
- 2.
List of IE Information Notices Issued in the Last Six Months Sincerely,
~~
James P. O'Reilly Director
/..,'
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Virginia Electric and Power Company cc w/encl:
e W.R. Cartwright, Station Manager Post Office Box 402 Mineral, Virginia 23117 P. G. Perry Senior Resident Engineer Post Office Box 38 Mineral, Virginia 23117 W. L. Stewart, Manager Post Office Box 315 Surry, Virginia 23883 SEP 2 6 1979 /
e UNITED STATES e
Accession No:
7908220121 SSINS:
6870 NUCLEAR REGULATORY COMMISSION OFFICE OF INSPECTION AND ENFORCEMENT WASHINGTON, D.C.
20555 September 26, 1979
.IE Information Notice No. 79-23 EMERGENCY DIESEL GENERATOR LUBE OIL COOLERS Within a two week time span (August 27 to September 11, 1979), the tube sheets failed in the Arkansas Nuclear One (ANO) Unit 1 lube oil coolers for both of the Unit 1 Emergency Diesel Generators.
The introduction of water into the diesel lube oil system resulted in trips of both diesels during surveillance testing.
The diesels were not considered capable of sustained operation.
Investigation by the licensee has indicated cracks around the outer periphery of the tube sheets.
The exact failure mode has not been assessed; however, the licensee has replaced the Emergency Diesel lube oil coolers for both diesels with a cooler of different design.
The original lube oil coolers ha.d tube sheets which were one-eighth (1/8) inch in thickness and the tubes were soldered in place.
Epoxy was also used as a sealer on the tube (water side) of the lube oil cooler.
The new coolers have one-half (1/2) inch tube sheets and the tubes are rolled.
The ANO, Unit 1 Emergency Diesel Generators were purchased in 1970 and were manufactured by the Electromotive Division of General Motors Corporation. The lube oil coolers (Model Number D-191700) were manufactured by Young Radiator Corporation.
This information is provided as an early notification of a possible significant matter. It is expected that recipients will review the information for possible applicability to their facilities.
No specific action or response is requested at this time. If further NRC evaluations so indicate, an IE Circular or Bulletin will be issued to recommend or.request specific licensee actions. If you have questions regarding this matter, please contact the Director of the appropriate NRC Regional Office.
IE Information Notice No. 79-23 September 26, 1979 LISTING OF IE INFORMATION NOTICES ISSUED IN LAST SIX MONTHS Information Notice No. 79-23 79-22 79-21 79-20 (Rev. 1) 79-2.0 79-19 (Correction -
Enclosure) 79-19 79-18 79-17 79-16 79-15 79-14 Subject Emergency Diesel Generator Lube Oil Coolers Qualification of Control Systems
- Transportation and Commer-cial Burial of Radioactive Materials NRC Enforcement Policy NRC Licensed Individuals NRC Enforcement Policy NRC Licensed Individuals Pipe Cracks in Stagnant Borated Water Systems at PWR Plants Pipe Cracks In Stagnant Borated Water Systems At PWR Plants Skylab Reentry Source Holder Assembly Damage Damage From Misfit ~etween As.sembly and Reactor Upper Grid Plate Nuclear Incident at Three Mile Island Deficient Procedures NRC Position of Electrical Cable Support Systems Date Issued 9/26/79 9/17/79 9/14/79 9/11/79 9/7/79 8/14/79 7/18/79 7/17/79 7/6/79 6/20/79
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6/22/79 6/7/79 6/11/79 Enclosure Page 1 of 2 Issued To All Holders of CPs and OLs All Holders of CPs All Holders of OLs All Licensees as Supple-mental Information to IE Bulletin Nos. 79-19
& 79-20 All Holders of Reactor OLs and CPs and Production Licensees with Licensed Operators
- All Holders of Reactor OLs and CPs and Production Licensees with Licensed Operators All Holders of Reactor OLs and CPs All Holders of Reactor OLs and CPs All Holders of Reactor OLs All ~olders of Reactor OLs and CPs All Research ~eactors and Test Reactors with OLs All Holders of Reactor OLs and CPs All Power Rea~tor Facilities with a CP
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IE Information Notice No. 79-23 September 26, 1979 LISTING OF INFORMATION NOTICES ISSUED IN LAST SIX MONTHS Information Notice No. 79-13 79-12 79-11 79-10 Subject Indication of Low Water Level in the Oyster Creek Reactor Attempted Damage to New Fuel Assemblies Lower Reactor Vessel Head Insulation Support Problem Nonconforming Pipe Support Struts Date Issued 5/29/79 5/10/79 5/7/79 4/16/79 Enclosure Page 2 of 2 Issued To All Holders of Reactor OLs and CPs All Fuel Facilities Research Reactors, and Power Reactors with an OL or CP All holders of Reactor OLs and CPs All power reactor facilities with a CP
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