ML20117D877
| ML20117D877 | |
| Person / Time | |
|---|---|
| Site: | Beaver Valley |
| Issue date: | 05/06/1985 |
| From: | Carey J DUQUESNE LIGHT CO. |
| To: | Knighton G Office of Nuclear Reactor Regulation |
| References | |
| 2NRC-5-065, 2NRC-5-65, NUDOCS 8505100254 | |
| Download: ML20117D877 (4) | |
Text
7 sk
'A@
Duquesne Li@t jys@f"
===a...
Pittsburgh, PA 15205 May 6, 1985 1
1 United States Nuclear Regulatory Comission Washington, DC 20555 ATTENTION: Mr. George W. Knighton, Chief Licensing Branch 3 Office of Nuclear Reactor Regulation
SUBJECT:
Beaver Valley Power Station - Unit No. 2 Docket No. 50-412 Illumination Levels Gentlemen:
As requested in a telephone conversation with Division of Human Factors safety representatives on April 10, 1985, Duquesne Light Company is providing a more clearly defined position regarding the illumination issue.
This position is attached as a revised response to Question 430.65.
DUQUESNE LIGHT COMPANY h
By
)b r
J. WCarey V Vice President GLB/wjs Attachment cc: Mr. D. H. Beckham, Acting Deputy Director (w/a)
Mr. R. DeYoung, Director (3) (w/a)
Mr. W. H. Regan, Acting Branch Chief (w/a)
Mr. B. K. Singh, Project Manager (w/a)
Mr. G. Walton, NRC Resident Inspector (w/a)
INP0 Records Center (w/a)
NRC Document Control Desk (w/a)
SUBSCRIBED ND SWORN TO BEFORE E THIS g DAY OF
/A r
,1985.
Q) h Notary Public 9505100254 850506
$NERA M. FATT08f, NOTARY PURIC 8[
PDR ADOCK 05000412 SMiPrimCPoet soso MAwa CouaTY 0
A PDR Mr Commasse Exceefs $fPT.14,1985 feeabw, Pe@ie Association of beteries
!I
Unit;d States Nuclear Regulatory Commission Mr. George W. Knighton, Chief Illumination [evels Page 2 C0WiONWEALTH OF PENNSYLVANIA )
)
SS:
COUNTY OF BEAVER
)
On this [dM day of Y[N-
/9((, before me, a Notary Public in and for said CommonweM1th and County, personally appeared J. J. Carey, who being duly sworn, deposed and said that (1) he is Vice President of Duquesne Light, (2) he is duly authorized to execute and file the foregoing Submittal on behalf of said Company, and (3) the statements set forth in the Submittal are true and correct to the best of his knowledge.
OJ WW Notary Public SHElLA 5. FATT0tE. MTARY PutuC SHIPPIMPORT B000.SEAVER COMTY NY C0mm15500n EXP6tES $EPT.16,1985 Member, Pennsylvania Assetistion of Iloteries x
l i
l l
l
\\
(
r BVPS-2 FSAR NRC Letter September 19, 1983 Question 430.65 (Section 9.5.3)
You state in Section,9.5.3.1 of the FSAR that the lighting systems provide adequate illumination in all access areas and in all areas
-required for control of safety-related equipment. This statement is too general. The staff has determined that a minimum of 10 foot-candles at the work station is required to adequately control, monitor, and/or maintain safety-related equipment during accident and transient conditions.
For those safety-related areas listed in Requests 430.51 and 430.62, above, and illuminated by the ac and de lighting systems only, verify that the minimum of 10 foot-candles at the work station is being met.
Modify your design as necessary (SRP 9.5.3, Parts I and II).
Response
/}J6dA66 mAiSJrANE1 All backup emergency lighting subsystem in those areas required for the control of safe shutdown operation has been designated to provide a minimum of 10 foot-candles at the safe shutdown work stations addressed. Calculations verifying this attribute have been performed and completed.
As identified in the response to Question 430.61, Amendment 8, all safe shutdown control stations shall have an illuminated level of 10 foot-candles average maintained within the task-seeing areas of these work stations, with power provided from both the onsite nonsafety-related diesel generator and local battery pack units.
l In addition, as further identified in Question 430.61, all access and-
)
{
- egress paths to safe shutdown control stations shall have 'an illumination of 1/2 foot-candle average maintained as these paths are determined to be minimuu. activity and low hazard environments in accordance with Illuminating r.14ne.tring Society -(IES) guidelines.
These paths will have their 1%Ur y pswered from both the onsite, nonsafety-related diesel gS&;s.c<
ind local battery pack units.
\\
l l
Task areas in the plant Where act..ivities for equipment maintenance f
or repair may be required) and access and egress paths thereto, will be illuminated by portable battery powered lighting, readily accessible to operations personnel.
Portable lighting facilitates tasks for personnel by providing direct lighting at a proper and adjustable-angle on the equipment, minimizing surface shadows which could hinder maintenance or repair.
IMSE(Li Q
l
~
Amendment 8 Q430.65-1 September 1984 1
~~
==.-
INSERT A 4
With regard ' to ' egress lighting, the IES Lighting Handbook, 1981 Application Volume, under " Electric Generating Stations - Emergency Lighting" (p.9-34),
reference Section 2, and an IES transact ion entitled " Nuclear Power Plant Lighting," published in the Journal of IES, Vol. 5, p.107, January 1976.
In I
Section 2 of the IES Handbook, " Egress Route Emergency Illumination," illumi-i nation recommendations are given on p. 2-47.
The IES egress route emergency
~
j illumination recommendations are 0.5 fc minimum average maintained at floor level, with a recommended uniformity ratio of up to 20:1, and a maximum
-uniformity ratio of 40:1 along the center line.
The IES handbook also gives i
j certain specific locations within - a means of egress such 'as exit doors and j
intersections of corridors, where higher levels are recommended.
These higher levels (3 fc minimum average maintained) as well as the 0.5fc level will be provided per IES Lighting Handbook reconumendations.
I The IES recommended safety lighting illumination levels in nuclear powe r generating stations are given in the aforementioned " Transaction on Nuclear 1
Power Plant Lighting'," Table II.
General plant pedestrian areas (egress
" slight - hazard / low normal activity level" areas.
routes) are identified as Egress. routes are classified as slight hazard areas because, by design, egress routes are unobstructed pathways.- However, if any hazards should be identified during lighting system design or.the final lighting system design review, they will be' illuminated in accordance with Table II guidelines.
These l illumination levels of 0.5 fc 'and ' 2 fc will be provided for slight and high hazards, respectively, if any, located in the pathway. These levels are 4
absolute minimum at any time, at the hazard, on any plane where safety is i
related to seeing conditions.
The remainder of the egress path will be I
illuminated to 0.5fc minimum average maintained, with uniformity ratios in
.acc rdance with SRP 9.5.3 - and the IES Lighting Handbook's egress route emergency illumination recommendations.
It should be noted that the 0.5fc 4
i minimum average maintained value specified on' page 2-47 of the handbook can result in. illuminat ion levels at specific : points which are. less than 0.5fc.
Use of Table II ensures that no slight hazard. is illuminated to less than 0.5fc and no high hazard is illuminated to less than 2fc regardless of the minimum' average maintained illumination for the surrounding area.
l Lighting design criteria for access paths will be the same as for egress paths since the visual task, which is the safe movement of personnel through the area, is identical.
I t
i
).
5 i.
.