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

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- Cimmonwccith Edison 1400 Opus PI ce

'* Y Downers Grove, Illinois 60515 May 16, 1990 I Dr. Thomas E. Murley, Director i

l Office of Nuclear Reactor Regulation 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 PDR fP F ADOCK 05000454 i PDC ..- # 'l

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

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., 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 ) .

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2.1 2 Note 1 Ionization- .2,000 lb of paper -44 7404-=

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 , insulation

.(Unit 2.detec - 62 lb gasketing 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 . Automatic. total lonisation' 37 lb gasketing. 26,700 Nonsegregated 7 flooding carbon detection . 15,000 lb cable.

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 .

tion' tono 51)'

(Unit 1 suppres- 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 (Unit I detec-(Unit I suppres- . tion Zone 55) sion Zone 46) Fenwat thermal +

(Unit I detection tone 56) Note 3 2.2 18 *

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

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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 '