ML18079B035
| ML18079B035 | |
| Person / Time | |
|---|---|
| Site: | Salem  |
| Issue date: | 09/26/1979 |
| From: | Grier B NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION I) |
| To: | Schneider F Public Service Enterprise Group |
| References | |
| NUDOCS 7910040146 | |
| Download: ML18079B035 (4) | |
Text
UNITED STATES NUCLEAR REGULATORY COMMISSION REGION I 631 PARK AVENUE KING OF PRUSSIA, PENNSYLVANIA 19406 Docket No. 50-272 SEP 2 6 1979 Public Service Electric and Gas Company ATTN:
Mr. F. W. Schneider Vice President - Production 80 Park Pl ace
- Newark, New Jersey 07101 Gentlemen:
The enclosed Information Notice prqvides information with regard to failures of lube oil coolers for emergency diesel generators.
Sincerely,
~~
~ Boyce H. Grier f.:;.;.- Di rector
Enclosures:
- 1.
IE Information.Notice 79-23
- 2.
List of IE Information Notices Issued in the Last Six Months cc w/encls:
F. P. Librizzi, General Manager - Electric Production E. N. Schwalje, Manager - Quality Assurance R. L. Mittl, General Manager - Licensing and Environment H. J. Midura, Manager - Salem Generating Station 7910040
ENCLOSURE 1 Accession No:
7908220121 SSINS:
6870 UNITED STATES NUCLEAR REGULATORY COMMISSION OFFICE OF INSPECTION AND ENFORCEMENT WASHINGTON, D.C.
20555 EMERGENCY DIESEL GENERATOR LUBE OIL COOLERS IE Information Notice No. 79-23 Date:
September 26, 1979 Page 1 of 1 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 had 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 1icensee actions.
If you have questions regarding this matter, please contact the Director of the appropriate NRC Regional Office.
Information Notice No. 79-15 79-16 79-17 79-18 79-19 79-20 79-20 (Revision No. 1) 79-21 79-22 IE Informati!Notice No.
Date:
Sept~mber 26, 1979 Page 2 of 2 79-23 LISTING OF IE INFORMATION NOTICES ISSUED IN 1979 Subject Deficient Procedures Nuclear Incident at Three Mile !~land Source Holder Assembly Damage from Misfit Between Assembly and Reactor Upper Grid Plate Skylab Reentry Pipe Cracks in Stagnant Borated Water Systems at PWR Plants NRC Enforcement Policy -
NRC Licensed Individuals Same Title as 79-20 Transportation and Com-mercial Burial of Radio-active Material Qualification of Control Systems Date Issued to Issued 6/7/79 All power reactor facilities with an OL or CP 6/22/79 All research and test reactors with an OL 6/20/79 All holders of reactor OLs and CPs 7/5/79 All holders of reactor OLs 7/17/79 All power reactor facilities with an OL or CP 8/14/79 All Holders of Reactor Ols and CPs and Production Licensees with Licensed Operators 9/7/79 Same as 79-20 9/7/79 All power and research reactors with OLs 9/14/79 All power reactor f aci*-