ML20106D351
| ML20106D351 | |
| Person / Time | |
|---|---|
| Site: | Byron  |
| Issue date: | 10/11/1984 |
| From: | Farrar D COMMONWEALTH EDISON CO. |
| To: | Harold Denton Office of Nuclear Reactor Regulation |
| References | |
| 9293N, NUDOCS 8410250102 | |
| Download: ML20106D351 (2) | |
Text
- --
m.
/
Commonwealth Edison
[G ) one Fast Nationit Plus Chicigo, rhnois' (j} Adoriss Reply tz P:st Offica Box 767 s
Chicago, minois 60690 October 11, 1984
/
Mr. Harold R. Denton, Director Office of Nuclear Reactor Regulation U.S. Nuclear Regulatory Commission Washington, DC 20555 Sub ject:
Byron Generating Station Unit 1 Fire Protection NRC Docket No. 50-454 Reference (a):
June 17, 1983 letter from T. R. Tramm to H. R. Denton.
Dear Mr. Denton:
In reference (a), Commonwealth Edison committed to install a fire hazards panel containing redundant safe shutdown instrumenta-tion to address NRC concerns regarding the consequences of a fire in the auxiliary electric equipment room or control room.
Based on equipment procurement and construction completion schedules projected at that time, it was noted that the Byron Unit 1 panel could not be installed prior to fuel load.
We. agreed to install the panel as soon as practical, but no later than the end of the first refueling outage..
.The.NRC documented their acceptance of this schedule in Supplement No. 3 to the Byron SER (November, 1983).
When the Byron Unit 1 fuel load schedule changed, the NRC requested that we improve
-our. Installation schedule for'the panel.
Based on review of-equipment delivery schedules, all compo-nents will be available by December 31, 1984.
All design information necessary for installation of this panel and instrumentation has been issued.
Therefore, our installation schedule is revised such that after Byron Unit 1 achieves 50% power, the fire hazards panel will be -installed at the first ' identified outage projected to be two weeks or longer.
If no such outage occurs, the panel will be installed at the first refueling outage but in any case not later than September 30, 1986.
We consider interim operation of Byron 1 without this panel to be acceptable based upon: 1) the relatively low likelihood of a damaging fire in either the control room or the auxiliary electric equipment room during the first fuel cycle, (2) the circuits involved g&Y i
8410250102 e41011 (70!
PDR ADOCK 05000454
' 0 i
PDR i
~
'H.
R..Denton October 11, 1984 serve monitoring functions, not control functions and, (3) our commit-ment to-implement a fire watch in the auxiliary electric equipment room and sample reactor coolant boron concentration if source range indication is lost due to-a control room fire.
These commitments are documented-in~the Fire Protection Report.
Please address further questions regarding this matter to this office.
One signed original and fifteen copies of this letter are provided for NRC review.
Very ruly yours, k =m D.
L'.
Farrar Director of Nuclear Licensing 1m 9293N
.o