ML19246C362
| ML19246C362 | |
| Person / Time | |
|---|---|
| Site: | Comanche Peak  |
| Issue date: | 07/13/1979 |
| From: | Seyfrit K NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION IV) |
| To: | Gary R TEXAS UTILITIES ELECTRIC CO. (TU ELECTRIC) |
| References | |
| NUDOCS 7907240410 | |
| Download: ML19246C362 (1) | |
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~4 UNITED STATES S'
NUCLEAR REG 8!LATORY COMMISSION
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REGION IV
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ARLINGTON, TEXAS 70012 July 13, 1979 In Reply Refer To:
RIV Docket Nos.
50-445/IE Circular No. 79-13 50-446/IE Circular No. 79-13 Texas Utilities Generating Coapany ATTN:
Mr. R. J. Gary, Executive Vice President and General Manager 2001 Bryan Tower Dallas, Texas 75201 Centlemen:
The enclosed IE Circular No. 79-13, is forwarded to you for information. No written response is required.
Should you have any questions related to your understanding of this matter, please contact this office.
Sincerely, b
'Y&&$'b7fw t
Karl V. Seyfrit Director
Enclosures:
1.
IE Circular No. 79-13 2.
List of 1C Circulars Issued in Last li Mor.chs C'
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362 214
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UNITED STATES NUCLEAR REGULATORY C0t1 MISSION OFFICE OF INSPECTION AND ENFORCEMENT 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 28, 1978, the Diesel Fire Pump failed to start remotely at Davis-Besse, Unit I 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 nagnetic 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 perr: lits 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 hciders 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.
"L" # '~~ ~ " ~ ~ ~ - " O No written response to this C' U"
information regardin tl NRC Regiona1 Office.
DUPLICATE DOCUllENT 1r)
Entire document previously entered N
into system under:
Enclosure:
xNo 79 0 ~7/90/M d
Cummins Service / Parts Topics
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