ML17053B056
| ML17053B056 | |
| Person / Time | |
|---|---|
| Site: | Nine Mile Point  |
| Issue date: | 09/26/1979 |
| From: | Grier B NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION I) |
| To: | Schneider R NIAGARA MOHAWK POWER CORP. |
| References | |
| NUDOCS 7910040133 | |
| Download: ML17053B056 (8) | |
Text
6'EGy Vp0 Cy A
O IlA Docket'~ "50-220 UNITEDSTATES NUCLEAR REGULATORY COMMISSION REGION I 631 PARK AVENUE KING OF PRUSSIA, PENNSYLVANIA19406 SEP 26 l979 Niagara Mohawk Power Corporation ATTN:
Mr.
R.
R. Schneider Vice President Electric Operations 300 Erie Boulevard Mest
- Syracuse, New York 13202 Gentlemen:
The enclosed Information Notice provides information with regard to failures of lube oil coolers for emergency diesel generators.
Sincerely, Director
Enclosures:
l.
IE Information Notice 79-23 2.
List of IE Information Notices Issued in the Last Six Months cc w/encls:
T.
E.
- Lempges, General Superintendent, Nuclear Generation T. J.
Perkins, Station Superintendent C.
L. Stuart, Operations Supervisor E.
B. Thomas, Jr.,
Esquire A. Z.
- Roisman, Natural Resources Defense Council 791 0040 l ggj' I
0
+C
ENCLOSURE 1 Accession No:
7908220121 SSINS'870 UNITED STATES NUCLEAR REGULATORY COMMISSION OFFICE OF INSPECTION AND ENFORCEMENT MASHINGTON, D.C.
20555 IE Information Notice No. 79-23 Date:
September 26, 1979 Page 1 of 1 EMERGENCY DIESEL GENERATOR LUBE OIL COOLERS Mithin 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 licensee actions.
If you have questions regarding this matter, please contact the Director of the appropriate NRC Regional Office.
ENCLOSURE 2
. IE Information Notice No. 79-23 Date:
September 26, 1979 Page 1 of 2 LISTING OF IE INFORMATION NOTICES ISSUED IN THE LAST SIX MONTHS Information Subject Notice No.
Date Issued Issued to 79-07 79"08 79-09 79-10 79-11 79-12 79-13 79-14 Rupture of Radwaste Tanks Interconnection of Contaminated Systems with Service Air Systems Used As the Source of Breathing Air.
Spill of Radioactivity Contaminated Resin Nonconforming Pipe Support Struts Lower Reactor Vessel Head Insulation Support Problem Attempted Damage to New Fuel Assemblies Indicati on of Low Mater Level in the Oyster Creek Reactor Safety Classification of Electrical Cable Suppot t Systems 3/26/79, 3/28/79 3/30/79 4/16/79 5/7/79 5/11/79 5/29/79 6/11/79 All power reactor facilities with an OL or CP All power reactor facilities with an OL and Pu Processing fuel facilities All power reactor facilities with an OL All power reactor facilities with a CP All power reactor facilities with an OL or CP All Fuel Facilities, Research
- Reactors, and Power Reactors with an OL or CP All power reactor facilities with an OL.or CP All applicants for, and holders of a power reactor CP
Enclosure 2
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IE Information Notice No. 79-23 Date:,
September 26, 1979 Page 2 of 2 LISTING OF IE INFORMATION NOTICES ISSUED IN 1979 Information Subject Notice No.
Date Issued Issued to 79-15 79-16 79-17 Deficient Procedures Nuclear Incident at Three Mile Island Source Holder Assembly Damage from Misfit Between Assembly and Reactor Upper Grid Plate 6/7/79 6/22/79 6/20/79 All power reactor facilities with an OL or CP All research and test reactors with an OL All holders of reactor OLs and CPs 79-18 79-19 Skylab Reentry Pipe Cracks in Stagnant Borated Water Systems at PWR Plants 7/5/79 All holders of reactor OLs 7/17/79 All power reactor facilities"with an OL or CP 79-20 NRC Enforcement Policy-NRC Licensed Individuals 8/14/79 All Holders of Reactor OLs and CPs and Production Licensees with Licensed Operators 79-20 (Revision No. 1) 79-21 79-22 Same Title as 79-20 Transportation and Com-mercial Burial of Radio-active Material qualification of Control Systems 9/7/79 Same as 79-20 9/7/79 All power and research reactors with OLs 9/14/79 All power reactor faci-cilities with an OL or CP
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