ML20133G661
| ML20133G661 | |
| Person / Time | |
|---|---|
| Site: | Fermi  |
| Issue date: | 10/12/1985 |
| From: | Jens W DETROIT EDISON CO. |
| To: | Youngblood B Office of Nuclear Reactor Regulation |
| References | |
| RC-LG-85-0069, RC-LG-85-69, V-85-0200, V-85-200, NUDOCS 8510160071 | |
| Download: ML20133G661 (2) | |
Text
Wayne H. Jc;ns
,t
\\ 4.ei f w&n!
Detroit S
,,,m Edison =.m m mm-Opuations October 12, 1985 RC-LG-85-0069 Director of Nuclear Reactor Regulation Mr.
B.
J. Youngblood, Chief Lic en s ing Branch No. 1 Division of Licensing U.
S.
Nuclear Regulatory Commission Washington, D.C.
20555
Dear Mr. Youngblood:
Reference:
1)
Fermi 2 NRC Docket No. 50-341 NRC License No. NPF-43 2)
Detroit Edison to NRC letter, "Addtional Information on Electrical Separations".
NE-85-0906 dated June 24, 1985
Subject:
Imniementation Schedule for ATWS Comn11nnce Detroit Edison intends to be in full compliance with 10CFR50.62 (requirements for reduction of risk from Anticipated Transients Without Scram (ATWS) events for light-water-cooled nuclear power plants) before startup following the second refueling outage for Fermi 2.
Fermi 2 has an Alternate Rod Insertion (ARI) system, as described in FSAR Sections 4A.2.3.2.2.4, 7.1.2.1.34, and 7.6.1 18.2, that is designed to mitigate the potential consequences of an ATWS.
The ARI system has its own detection and actuation logic and is redundant to the reactor protection system.
The ARI system is installed and operational.
Fermi 2 has a Recirculation Pump Trip (RPT), as described in FSAR Sections 7.1.1.2, 7.7.1.3.3.1, for the reactor recirculation pump motor generator field breaker that is a function of the recirculation flow control system designed to mitigate the effects of an ATWS event.
The recirculation pump is installed and operational.
In accordance with our commitment in Reference 2,
flexible conduit will be installed as practicable on one of the divisional control cables for initiation of RPT in each of the recirculation pump field breaker cabinets to provide additional separation.
This work will be completed before startup following the second refueling outage.
0510160071 853012 gh y0 PDR ADOCK 05000341 p
PM l
k
Mr.
B.
J. Youngblood October 12, 1985 VP-85-0200 Page 2 The Standby Liquid Control System (SLCS) control capacity will be f
made equivalent to 66 gallons per minute of 13 weight percent sodium penetaborate solution by increasing boron enrichment.
The i
modifications to the Fermi 2 Standby Liquid Control System to use enriched boron solution will be completed and the system will be operational before startup following the second refueling outage.
l If you have any questions regarding this matter. please contact Mr.
R.
L. Woolley at (313) 586-4211.
Sincerely.
F With Attachment cc Mr.
P.
M.
Byron Mr.
M.
David Lynch i
USNRC Document Control Desk f
Washington, D.C.
20555 l
I t
f L
I
.