ML20198B208
| ML20198B208 | |
| Person / Time | |
|---|---|
| Site: | Fermi  |
| Issue date: | 10/29/1985 |
| From: | Jens W DETROIT EDISON CO. |
| To: | James Keppler NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION III) |
| References | |
| VP-85-0202, VP-85-202, NUDOCS 8511060324 | |
| Download: ML20198B208 (3) | |
Text
,
.O ? '
g f
vce%"A*
n.
Nudear Operabons Fermb2 1
ra lons October 29, 1985 VP-85-0202 Mr.JJames G. Keppler
-Regional Administrator Region III U. S. Nuclear Regulatory Commission 799 Roosevelt Road Glen Ellyn, Illinois 60137
Reference:
.1)
Fermi 2 NRC Docket No. 50-341 NRC License No NPF-43 2)
Detroit Edison to NRC Letter, " Detroit Edison Amended Response to NRC Inspection Report 50-341/84-16", EF2-72015, dated November 26, 1984
- 3)'
USNRC Inspection Report-341/84-49, dated February 15, 1985
Subject:
Diesel Fuel Oil Warmer Reference 2 committed-Detroit' Edison to install a fuel oil warmer on.th.e fuel oil supply to the starting diesel for
'the' Combustion Turbine Generators (CTG) which will provide power to the Alternate Shutdown System.
This commitment was made concurrent with a' commitment to install a similar warmer on the fuel supply line for the diesel fire pump which has since been completed.
At the time the commitment was made, the exact' configuration of the fuel supply for the CTG starting diesel was not known.
The intent of this installation was to assure that the fuel oil does not gel during extremely cold weather and thereby inhibit proper operation of these important pieces of equipment.
Detroit Edison has'recently reviewed the fuel oil supply for the' CTG starting diesel.
The attached illustration provides aLsketch of the present fuel oil supply system.
.The starting diesel and the illustrated fuel oil supply components are all located in a heated compartment on the CTG skid and thus are not exposed to sub-freezing
. temperatures.. This feature assures an immediate supply of warm fuel for starting the engine.
NOV 11985 8511060324 951029 PDR ADOCK 05000341-1 G
PDR g
$/
'i
~
e Mr. James G. Keppler October 29, 1985 VP-85-0202 Page 2 The most common fuel heaters available to warm the fuel during diesel operation are blending units inserted in the fuc1 oil supply line between the source and the fuel filter and in the return line between the injectors and the fuel tank.
These units blend the warmed fuel from the injectors / cylinder head with the incoming cold fuel from the supply.
On the CTG starting diesel, the float tank serves the purpose of blending warm return fuel with cold supply fuel before.it passes the fuel oil filter.
This design is similar to the warming system added to the diesel driven fire pump.
Therefore, Detroit Edison believes that open item 84-49-20 should be closed because the present design provides adequate fuel oil warming.
If you have further questions regarding this matter, please contact-Mr. R. L. Woolley (313) 586-4211.
Sincerely, f
fy L
cc:
Mr. P. M. Byron Mr. M. David Lynch Mr. G. C. Wright USNRC Document Control Desk Washington, D.C.
20555
+
HEATED ENCLOSURE ON SKID FUEL PUMP
'I A
f l
if if if if if ir 3r 3r TO INJECTORS l
STARTING DIESEL ENGINE YNl
^
ED WITH COOL FUEL FROM SUPPLY IN THIS FLOAT TANK l
3g FLCAT 4
FUEL 4
TA E FILTER h
O l
PRESSURE f
m, TAP OD U OFF PRESSURE REGULATOR MAIN FUEL OL COMBU 1 TURBINE <
GENERATOR ENGINE SOURCE TO CTG FUEL SUPPLY TO STARTING DIESEL FOR CTG'S
.