ML20043A916

Provides Advanced Notification of Change That Will Be Made to Fire Protection Rept Pages 2.2-18 & 2.3-14

ML20043A916
Person / Time
Site:	Byron, Braidwood
Issue date:	05/16/1990
From:	Hunsader S COMMONWEALTH EDISON CO.
To:	Murley T Office of Nuclear Reactor Regulation
References
NUDOCS 9005230279
Download: ML20043A916 (4)

Text

,

Cimmonwccith Edison 1400 Opus PI ce Y

Downers Grove, Illinois 60515 May 16, 1990 I

Dr. Thomas E. Murley, Director i

Office of Nuclear Reactor Regulation l

U.S. Nuclear Regulatory Commission Washington, DC 20555 ATTN: Document Control Desk

Subject:

Byron Station Units 1 and 2 Braidwood Station Units 1 and 2 4

Fire Protection Report

)

-NRC Docket Nas d Q-A54/455 and 50-456/451

Reference:

(a) December 14, 1983 T.R. Tramm letter to H.R. Denton.

'I

Dear Dr. Murley:

Reference (a) provided a revised response to Open Item #4-to the July, 1983 NRC Fire Protection-Audit, performed at Byron Station for Unit 1.

3 Reference (a) provided in part, the fire loading for Fire Zones 2.1-1 and 2.1-2 of 42,300 BTU /ftb and 43,900. BTU /ft2, respectively. As a result of a recent Commonwealth Edison review, the value of.43,900 BTU /ft2 for Zone 2.1-2 was identified as not having been incorporated into the Byron /Braidwood Fire Protection Report (FPR).

As a result, the purpose-of this letter is to provide an advanced notification of a change that will be'made to FPR pages 2.2-18 and 2.3-14 that will be provided to the NRC staff in the annual FPR update in December, 1990, consistent with Edison's previous committment. Marked-up copies of;pages j

2.2-18 and 2.3-14 are provided in Attachment A.

The fire loading has remained and is below the 43,900 BTU /ft2 value in Zone 2.1-2 at both the Byron and Braidwood Stations.

Please direct any questions-regarding this submittal to this office, i

Very.truly yours, Ac9 M S.C. Hunsader Nuclear Licensing Administrator Attachments cc:

P. Shemanski - Project Manager, NRK S. Sands - Project Manager, NRR W. Shafer - RIII BY Resident Inspector BW Resident Inspector

-/Imw 0939T11 9005230279 900316 fP PDR ADOCK 05000454 F

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s BYRON /BRAIDWOOD-FIRE PROTECTION REPORT-PAGES: -2.2-18 2.3-14 i

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D/B' N

e TABLE 2.2-3 -(Cont 'd)

I FIRE AREA /20NE FIRE LOAD DES GN NUMBER AND NAME FIRE PXrrECTION FIRE (ETECTION COMBUSTIBif.

FI RE ' (B t uf f t )

2.1 2 Note 1 Ionization-

.2,000 lb of paper

-44 404-=

7

~**

Record storage

. detection 2.88 lb of gasketing gg3 9oC and toljet room (Unit 2 detec--

71.8 lb of insulatio

/

tion tone 70) 3.1-1 Unit 1 Automatic total tonisation 6000 lb cable.

45,200.

cable tunnel flooding carbon detection insulation dioalde system

.(Unit 1,detec-46.8 lb gasketing (Unit I suppres-tion tone 64) sion tone 47)

.Fenwal thermal (Unit I detection zone 65) Note 3 3.1-2 Unit 2 Automatic total tonisation.

3400 lb' cable

'25,700 cable tunnel flooding carbon detection insulation

- dioxide system (Unit 2 detec-45 lb gasketing (Unit 2 suppres.

. tion tone 64) sion tone 47)

Fenwal thermal

.(Unit 2' detection Zone 65) Note 3' 3.2-0 Auxiliary Note 1.

Ionisation ~

1200 lb cable 9,500-building El. 4 39'-0*

detection,

62 lb gasketing insulation

.(Unit 2.detec -

tion tone 61) s 3.2A-1 Unit 1 Automatic total

-Ionisation 37 lb gasketing 33,100 Nonsegregated flooding carbon

. detection 19,000 lb cable bus duct area dioxide system (Unit I detec-insulation (Unit 1 suppres.

tion tone 49)-

t alon Zone 43)

Fenwal thermal' (Unit I detection Zone 50) Note 3 3.2A-2 Unit'.2 Nonsegregated

. Automatic. total lonisation' 37 lb gasketing.

26,700 flooding carbon detection.

15,000 lb cable.

7 bus duct area

- dioxide: system

(Unit 2 detec-~

insulation (Unit 2 suppres '

tion l2one'49)-

sion Zone 43) renwal thermal.

(Unit 2 detection tone 50) Note 3 l

3.28-1 Lower Automatic total

. Ionization' 49.lb gaskets' 44,000 cable spreading flooding carbon detection '

820 lb. ducting area, tone D-1 dioxide system (Unit 1 detec--

insulation.

(Unit 1 suppres-tion' tono 51)'

27,000 lb cable' sion tone 44)

.Fenwat thermat insulation (Unit i detection-tone 52) Note.3

.3.20-2 Lower Automatic total'

' Ionization 14.4 lb flex 42,200 cable spreading flooding carbon detection connections area, tone B-2 dioxide system' (Unit 2 detec-26,000 lb cable (Unit 2 suppres-~

' tion Zone $1)

. insulation alon Zone 44)

Fenwal thermal (Unit 2 detection zone 52) ' Note 3 -

3.2C-1 Lower Automatic total Ionization 23,000 lb cable 69,800' cable spreading flooding carbon detection Insulation area, zone C dioxide system (Unit 1 (etec-(Unit I suppres-tion tone 53) alon' tone 45)

Fenwal' thermal.

8 Unit I detection tone 53) Note 3 3.2C-2 Lower Automatic total' Ionization

-13,000 lb cable 39,300 cable spreading flooding carbon detection insulation area, Zone C-2 dioxide system (Unit 2 detec-(Unit 2 suppres-tion Zone 53) sion. tone 45)

Fenwal thermal (Unit 2 detection Zono 54) Note 3 3.2D-1 Lower Automatic total tonization 3100 lb cable 51,400 cable spreading flooding carbon detection insulation room, 2one D-1 dioxide system

. tion Zone 55)

(Unit I detec-(Unit I suppres-sion Zone 46)

Fenwat thermal

+

(Unit I detection tone 56) Note 3 2.2 18

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B/B AMEMBMEiG 6-JAM"?."? 1^65 Fire Barrier Description

(~T 1

~'

The-floor slab at elevation 451 feet 0 inch, which is the ceiling i

of the Lower Cable Spreading Room, is a 9-inch clear cover of structural reinforced concrete over 3-inch fluted steel decking formwork.

It is suported by structural steel beams protected with a fire resistant covering and carries a 3-hour' fire rating.

All walls of the storage area are 12-inch thick hollow concrete masonry units and carry a 3-hour fire rating and they extend up i

to within 1 inch o'f the ceiling above.

This resulting space is l

packed with a-1-inch thick blanket of foil-backed Thermafiber insulation.

A 3-hour. rated Label-"A" fire door leads to the' Control Room.

The ceiling. slab at elevation 463 feet 5-inches,.which is'the floor of the Upper. Cable Spreading Room, is a-2 1/2-inch clear cover of reinforced concrete over 3 hour3.472222e-5 days <br />8.333333e-4 hours <br />4.960317e-6 weeks <br />1.1415e-6 months <br /> protected l~1/2-inch a

fluted steel decking.

It-is supported by protected structural steel beams and carries a 3 hour3.472222e-5 days <br />8.333333e-4 hours <br />4.960317e-6 weeks <br />1.1415e-6 months <br /> fire rating.

An acoustical tile suspended ceiling system is provided below the ceiling slab in the storage area.

Safety-Related Equipment.

For details, see Subsection 2.3.2.2.

{

i Protection Criteria For details, see Subsection 2.3.2.2.

1 Combustible Materials

.This room will be used to store chart paper for control room recorders.

It is estimated that 2,000 pounds of paper will be stored here.

A transient load is not considered..

The-ductwork in this zone contains 2.88 pounds of gasketing and 71.8 pounds-of insulation.

The storage area = floor is covered with 203'ft of 1/8-inch thick vinyl-asbestos tile.

In addition, 59 lineal feet of:4-inch high vinyl cove base is provided at the intersection of the' walls and the floor.

Fire Loading gW.

2 With a floor area of 203 ft the. fire loading i is r499-Btu /f t Extinguishing and Detecting Capabilities

/

For details, see Subsection 2.3.2.2.

Design-Basis Fire For details, see Subsection 2.3.2.2.

l 2.3-14

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