ML19246C359
| ML19246C359 | |
| Person / Time | |
|---|---|
| Site: | Fort Saint Vrain  |
| Issue date: | 07/13/1979 |
| From: | Seyfrit K NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION IV) |
| To: | Millen C PUBLIC SERVICE CO. OF COLORADO |
| References | |
| NUDOCS 7907240405 | |
| Download: ML19246C359 (1) | |
Text
CENTRAL FILES PDP:HQ jy "%,'c UNITED ST ATES f
NUCLEAR REGULATORY COMMISSION 5.,,},fl.Ng ? 'oj IIbIC REGION IV G11 RYAN PLAZA DRIVE 5UITE 1000 D,
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July 13, 1979 Docket No.
50-267 Public Service Company of Colorado ATTN:
Mr. C. K. Millen Senior Vice Presideit P. O. Box 840 Denver, Colorado 80201 Gentlemen:
The encl sed IE Circular No. 79-13, is forwarded to you for information.
No uritten response is required.
Should you have any questions related to your understanding of this natter, please contact this office.
Sincerely, Gq Karl V. Seyfrit /
Director Enclo: ures :
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LE Circultr No. 79-13 2.
List of IE "irculars Issued in Last li Months cc.
D. W. Warembour,, Nuclear Production Manager Fort St. Vrain Nuclear Station P. O. Box 368 Platteville, Colorado 80651 L. Brey, Manager, Quality Assurance f
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UNITED STATES NUCLEAR REGULATORY CO.TIISSION OFFICE OF INSPECTION AND ENFORCEffENT WASHINGTON, D.C.
20555 IE Circular No. 79-13 Date:
July 13, 1979 Page 1 of 1 REPLACEMENT OF DIESEL FIRE PUMP STARTING CONTACTORS Description of Circumstances:
On May ^3, 1978, the Diesel Fire Pump failed to start remotely at Davis-Besse, Unit ' facility operated by Toledo Edison Company.
The cause for failure was defective starting contactors. A subsequent investigation into the cause of a similar failure on January 18, 1978, at Commonwealth Edison Company's Dresden 2/3 Diesel Fire Pump identified a generic problem with Cummins Indus-trial Fire Pump Engines.
Discussion:
The investigation revealed that Cummins Engine Company issued a Service / Parts Topics No. 74T 13-3A announcing new components available for Industrial Fire Pumps (NH-220-1F, N-855-F, N-855-F1, NT-855-F2 series engines) to improve operation of inline 6 cylinder Industrial Fire Pump Engines.
In this topic, Cummins recommends that when replacing the 118848 magnetic switch and 199573 DC relay contactor, use the new 217588 magnetic switch. The new design component has a 6 ampere draw, whereas the old combination has approximately 3 amperes draw. Davis Besse and Dresden sites have implemented the corrective action recommended by Cummins.
Recommended Actions for Licensees' Consideration:
All holders of operating licenses or construction permits should be aware of the potential problem of the type discussed above.
Because of the generic implications in this matter, it is recommended that both licensees of operating facilities and holders of construction permits conduct a review to datermine if the above diesel fire pump engines are in use or planned for use at your facility (ies).
If these engines are in use or planned for use, determine if the Cummins type 118848 Magnetic Switch and 199573 DC relay contactors are also employed.
For those engines which have these components, develop a pro-gram for their replacement with the new 217588 Magnetic Switch.
No written response to this Civen1'r ic ranui red.
If von reoni re additional information regarding these m?'
NRC Regional Office.
DUPLICATE DOCUMENT Entire document previously entered
Enclosure:
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Cummins Service / Parts Topics 7hb7/ O/bk h
No. 74T 13-3A ANO No, of pages:
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