ML20117F331
| ML20117F331 | |
| Person / Time | |
|---|---|
| Site: | Peach Bottom  |
| Issue date: | 05/08/1985 |
| From: | Boyer V PECO ENERGY CO., (FORMERLY PHILADELPHIA ELECTRIC |
| To: | Thompson H Office of Nuclear Reactor Regulation |
| References | |
| NUDOCS 8505130205 | |
| Download: ML20117F331 (3) | |
Text
_ _ _ _ _ _ _.
O y
PHILADELPHIA ELECTRIC COMPANY 2301 M ARKET STREET P.O. BOX 8699 PHILADELPHIA. PA.19101 t2isi e4i.4 soo
- v. s. no v s m CR. VlCE PRESIDENT NUCLE AR POWER May 8, 1985 Docket Nos. 50-277 50-278 Mr. Iluch L. Thompson, Jr.,
Director Division of Licensing U.S. Nuclear Pegulatory Commission Washington, D.C.
20555
SUBJECT:
Peach Bottom Atonic Power Station Fire Protection - Fire Dampers FEFERENCE: (1)
Letter from V. S.
Doyer to D.
G.
Eisenhut dated December 2, 1983 (2)
Lotter from V. S.
Boyer to D. G. Eisenhut dated September 17, 1984 (3)
Letter fron V. S.
Doyer to D.
G.
Eisenhut dated Janunry 16, 1985
Dear Mr. Thompson:
This letter identifice our pinns for completing the installation of three-hour qualified fire dampers in ventilation ducts penetratinn enfe shutdown fire barriers.
The following tabu]ntion provides a status of the fire damper programs Unit 3 Unit 2 Cerron Total Total 44 46 60 150 Qualified 11 8
15 34 l
Corpinte 10 5
17 32 Exemption 17 20 22 59 To Do 6
13 6
25 b
I O YY? $$$77 F
l PDR-l l
. a
0 t-Mr. Hugh L. Thompson, Jr.
May 8, 1985 Page 2 The obstacles hampering damper installation are as follows:
1.
Unanticipated radiation contamination of ductwork has almost doubled installation time.
Ductwork which serviced very low level radiation arcas has become slightly contaminated over the years.
Work in some of these ducts now requires not only Anti-C clothing, but also the use of portable HEPA filter units and enclosures arcund the work area.
2.
The increase in the tire required to install dampers in contaminated ductvork has resulted in lonaer outage periods of the associated ventilation systems.
This has raised concerns about the lack of cooling for areas containing vital equipment such as the battery roons and emergency switchgear rooms.
Consecuently, the plant engineering staff has been required to perform time consuming investientions regarding the effect of long-term HVAC outages en the vital equipment and the development of alternative cooling measures.
These investications also revealed that in several areas, the HVAC outages and associnted damper work had to be deferred until the next plant outage to avoid overheatino of vital equipment.
3.
An encineering analysis on a case-by-case basis has been found necesenry because of interferences associated with each damper installation, such as conduit and ductwork penetrating the same blockout, resulting in additional nodifications in order to facilitate damper installation.
Un prorosed in the Iteference (3) letter to conplete annper work by the end of the current Unit 2 outage, now estimated as the second week in June.
Because of continued installation problems, we will not meet the completion date.
We propose to provide fire watchen, prior to the resumption of full power operations on Pench Dottom Unit 2, in accordance with plant Technical Specifications until the installation program is conplete.
e.
Mr. Hugh L.
Thompson, Jr.
hay 8, 1985 Page 3 Technical Specifications require that either a continuous fire watch be establiched on one side of the affected barrier, or that the cperability of fire detectors on at least one side of the inoperable fire barrier be verified and an hourly fire watch patrol be established.
Compliance with this Technical Specification will assure that a fire condition is reccgnized and appropriate actions taken rapidly.
We will continue to install fire dampers as expeditiously as possible and report the damper installation status in our fire protection modifications progress reports which we have been submitting since May 27, 1983.
Very truly yours,
. {h
. pe -,
cc:
Dr.
T.
E. Murley, Administrator, Degion I T.
P. Johnson, Resident Site Inspector