ML19247A395
| ML19247A395 | |
| Person / Time | |
|---|---|
| Site: | 05000484 |
| Issue date: | 07/13/1979 |
| From: | James Keppler NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION III) |
| To: | Dienhart A NORTHERN STATES POWER CO. |
| References | |
| NUDOCS 7907310413 | |
| Download: ML19247A395 (1) | |
Text
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UNITED STATES pgg 3
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NUCLEAR REGULATORY COMMISSION
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JUL 131979 Docket No. 50-484 Northern States Power Company ATTN:
Mr. A. V. Dienhart Vice President - Tyrone Energy Park
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100 North Barstow Street Eau Claire, WI 54701 Gentlemen:
The enclosed IE Circular No. 79-13, is forwarded to you for infor-mation. No written response is required.
Should you have any questions related to your understanding of this matter, please contact this office.
Sincerely,
'w 1 JamesG.Kepplerg, Director
Enclosure:
IE Circular No. 79-13 cc w/ encl:
Central Files Directoc, NRR/DPM Director, NRR/ DOR PDR Local PDR NSIC TIC Regions I & IV b %
675001 7907310 9 3
U.S. NUCLEAR REGULATORY COMMISSION OFFICE Or INSPFCTION AND ENFORCEMENT REGION III July 13, 1979 IE Circular No. 79-13 REPLACEMENT OF DIESEL FIRE PUMP STARTING CONTACTORS
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Description of Circumstances:
On May 28, 1978, the Diesel Fire Pump failed to start remotely at Davis-Besse, Unit 1 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 Co=monwealth Edison Company's Dresden 2/3 Diesel Fire Pu=p identified a generic problem with Cu== ins Indus-trial Fire Pump Engines.
Discussion:
The investigation revealed that Cum = ins 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, Cumminc recomends 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 recoc=> ended by Cummins.
Recommended Actions for Licensees' Consideration:
All holders of operating licenses
>r construction permits should be aware of the potential problem of the type discussed above.
Because of the generic implications in this matter, it is recom= ended that both licensees of operating facilities and holders of construction permits conduct a review to determine 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 respense to this Circular is required.
If you require additional information regarding these matters, contact the Director of the appropriate NRC Regional Office.
- a n1-jDUPLICATE DOCUMENT Enclosures.
1.
Cut:= ins Service / Parts Topics Entire document previously entered No.
74 T 13-13A.
into system under:
2.
List of IE Circulars Issued in the Last Twelve Months.
E /[>l M 79[7~//9 /O ANO No. of pages:
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