ML20062L764
| ML20062L764 | |
| Person / Time | |
|---|---|
| Site: | Waterford  |
| Issue date: | 12/03/1993 |
| From: | Burski R ENTERGY OPERATIONS, INC. |
| To: | NRC OFFICE OF INFORMATION RESOURCES MANAGEMENT (IRM) |
| References | |
| TAC-M80691, W3F1-93-0083, W3F1-93-83, NUDOCS 9401050067 | |
| Download: ML20062L764 (9) | |
Text
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W3F1-93-0083 A4.05 PR December 3, 1993 U.S. Nuclear Regulatory Commission ATTN: Document Control Desk Washington, D.C. 20555
Subject:
Waterford 3 SES Docket No. 50-382 License No. NPF-38 Submittal of Requested Additional Information For NRC Review of Appendix R Exemption Request (TAC No. 80691)
Centlemen:
The attached information is submitted in response to your May 20, 1993 request for additional information associated with a Waterford 3 Appendix R Exemption request currently under review by your staff (TAC No. M80691)..
The request was submitted to the NRC via W3F1-91-0233 dated May 24, 1991.
The request was for reaffirmation of NRC approval of a portion of an-earlier request (W3P84-0709. dated March 26,1984) for relief from 10 CFR 50 Apendix R requirements in light of discrepancies identified' associated with the justification of the original NRC approval. Specifically, the request was for relief from Section III, G.2 of appendix R for not having fire dampers installed in two duct penetrations of a continuous duct through two, three hour fire walls. The fire walls separate 'a vestibule (211) from Reactor Auxiliary. Building Fire Areas 8B and 8C.
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Submittal of Requested Additional Information For NRC Review of Appendix R Exemption Request (TAC No. 80691)
W3F1-93-0083 Page 2 December 3, 1993 If you need further assistance, please contact 0.P. Pipkins at (504) 739-6707.
Very truly yours, v$d2 R.F. 8urski Director Nuclear Safety RF8/0PP/dc
Attachment:
Requested Information (TAC NO. M80691)
Drawings:
1564 G859 s01 rev 18 5817 G252 sll rev 06 1564 G853 s08 rev'12 1564 G321 s01 rev 18 1564 G331 rev 17 5817 6382 rev 07 5817 6383 rev 02 5817 6384 rev 02 5817 6385 rev 07 5817 6337 rev 07 5817 6338 rev 03 5817 1812 rev 10~
cc:
J.L. Milhoan, NRC Region IV D.L. Wigginton, NRC-NRR R.8. McGehee N.S. Reynolds NRC Resident: Inspectors Office.
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b REQUESTED INFORMATION (TAC NO. M80691) 1.
Provide a detailed description of the duct between the east wall of fire area 8B and north wall fire area 8c, including the function (supply or exhaust), air flow routes, design drawings, materials of construction, the size and number of openings in the duct between fire areas 8B and 8C.
DESCRIPTION:
The function of the duct between the east wall of fire area BB and the north wall of fire area 8C is to supply cooling ventilation to vestibule 211 (RAB +21 elevation.) After the duct penetrates the 3 hour3.472222e-5 days <br />8.333333e-4 hours <br />4.960317e-6 weeks <br />1.1415e-6 months <br /> rated fire wall separating the vestibule from fire area 88, the function of the duct is to supply cooling ventilation to the extreme east end of fire area RAB 8B (switchgear 'B' area.)
The duct branches away from the main supply trunk in fire area RAB 8C (Switchgear 'AB' area) cnd extends north approximately 18 feet, where it penetrates the 3 hour3.472222e-5 days <br />8.333333e-4 hours <br />4.960317e-6 weeks <br />1.1415e-6 months <br /> rated fire wall separating fire area RAB 8C from vestibule 211. The duct continues north approximately 9' feet in the vestibule where it angles 90 degrees west for an approximate distance of 3 feet and penetrates the 3 hour3.472222e-5 days <br />8.333333e-4 hours <br />4.960317e-6 weeks <br />1.1415e-6 months <br /> rated. fire wall separating the vestibule from fire area RAB 8B.
Inside RAB 88, the duct tees off in a north-south direction, immediately above the safety-related 480 volt motor control center MCC 3B313-S '(7 feet south, 17 feet north.)
So in summary, the route of supply air flow is from fire area RAB 80 through vestibule 211 to fire area RAB 8B (see drawing G859 s01.)
The design drawings involved are as follows (copies attached):
1564 G859 s01 rev 18 - HVAC Reactor Auxiliary Bldg Plan El +21'-0 5817 G252 s11 rev 05 - Safe Shutdown Analysis RAB +21 1564 G853 s08 rev 12 - HVAC Air Flow Diagram Sheet 3 1564 G321 s01 rev 18 - Electrical Equip Room Tray & Conduit Layout 1564 G331 rev 17 - Electrical Penetration Area Tray & Conduit Layout The material of construction for the duct, per Specification LOU
- 1564.744 (A), is 16 gage sheet metal. The duct is classified as safety-related and special construction, designed for a pressure range of 0-3" water gage. The duct is covered with 1-1/2" fibrous glass insulation.
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i The duct branch has four openings. Wherein the term " opening" is here defined as a register, grille, vent, etc.
Each of the four openings is equipped with an air register. One of the openings is a -
24" x 12" (730 CFM) register, located in fire area RAB 8C, approximately 11 feet south of the duct penetration into vestibule 211. A second 12" x 6" (180 CFM) register is located in vestibule 211 approximately 2 feet north of the vestibule's south wall. The remaining two registers, each sized 36" x 12" (north register 1460 CFM, south register 1420 CFM) are located approximately 18 fe>:t apart in the north-south duct tee extending into fire area RAB 88.
2.
Provide a complete description of combustible fuel packages (e.g.,
cable trays / location), including maximum anticipated transient fuel packages and type of fire expected (type of heat release rates) for fire areas 8B and 8C and the corridor.
DESCRIPTION:
Combustible fuel packages (from Calc No. EC-F91-010 Rev.1] in fire area RAB BB, located within 20' of the duct penetration are as follows:
Cable Tray Calculated BTUs P202C-SB 25,555,968-P202B-SB 45,914,112 C201 -SB 2,951,655 C201A-SB 12,931,060 C202 -SB 8,152,190 C201F-SB 6,941,56B C201C-SB 6,746,640 C2010-SB 6.465.533 115,658,723 BTUs NOTE: The term " duct penetration" is defined here as the wall opening provided to allow passage of the duct.
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Combustible fuel packages in fire area RAB 8C within 20' of the duct penetration between RAB 8C and the vestibule are as follows:
Fire Hose 500,000 BTUs [ Calc No.EC-F91-010]
Combustible fuel packages in vestibule 211 are as follows:
Trash can estimated maximum of 400,520 BTUs Emergency Lighting Unit estimated maximum of 810 BTUs Public Address Speaker estimated maximum of 43,282 BTUs PVC Jacket Material estimated maximum of. 38,652 BTUs Esrplug dispenser estimated maximum of 20,026 BTUs Approximately 2 lbs of Polyethylene Plastic estimated maximum of 40.050 BTUs 543,340 BTUs Vestibule 211 floor area is approximately 191 square feet. The resultant fire severity is approximately 2 minutes.
The vestibule serves as the main ingress / egress point for the Reactor Auxiliary Building. As such, it will contain various amounts of transient combustibles (accompanied by site personnel) in transit for very short durations. There is no equipment installed in the.
vestibule that requires regular or: extensive maintenance. A conservative estimate of the maximum anticipated' transient. fuel package 'is approximately 152,000 BTUs. This figure assumes one person transporting chemicals used in the chemistry lab.
Larger items would be brought into the plant through equipment access points located elsewhere.
Fires postulated for the switchgear envelope include:
(from Combustible Loading Calc EC-F91-010 revision 1) a)
an in-situ combustible exposure fire which assumes ignition of.
localized concentrations of cable insulation, and b) a transient combustible exposure fire.
The postulated fire area RAB 88 in-situ fire generates 374,187,392 BTUs and has a 33 minute fire severity. And, the postulated fire area RAB 8C in-situ fire generates'47,169,797 BTUs and has a 14 minute fire severity.
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4 3.
Provide a description of the distances (horizontal and vertical) between the fixed combustibles and the opening of the duct in both fire areas.
DESCRIPTION:
The distances (horizontal and vertical) between the fixed combustibles and the two duct penetrations are as follows:
Fire Area 8B Cable Tray Anoroximate Distance from RAB 88/ vestibule Denetration P202C-SB O'-3" vertical, 2'-6" horizontal PJ028-SB O'-3" vertical, S'-6" horizontal C201 -SB O'-3" vertical, 5'-0" horizontal C201A-SB O'-3" vertical, 3'-0" horizontal C202 -EB l'-0" vertical, S'-6" horizontal C201F-SB O'-3" vertical, ;1'-10" horizontal C201C-SB O'-3" vertical, 19'-8" horizontal C201D-SB 0'-3" vertical, 22'-0" horizontal Fire Area 8C Aporoximate Distance from RAB 8C/ vestibule cenetration Fire Hose 4'-0" vertical, 4'-0" horizontal The approximate distances between the fixed combustibles (horizontal and vertical) and the four duct openings are as follows:
1.) 12" x 6" Reaister in Vestibule 211 Trash can 6'-8" vertical, 8'-0" horizontal Emerg. light unit l'n8" vertical,10'-0" horizontal Loudspeaker 3'-0" vertical,13'-0" horizontal FP. control valves w/PVC cable jacket 4'-0" vertical, 4'-0" horizontal j
Earplug dispenser 4'-8" vertical, 8'-0" horizontal i
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q NOTE: Measurements taken from approximate centerline of registers to nearest edge of cable tray.
2.) 24"x 12" reafster in RAB 8C C201F-SB O'-4" vertical,15'-6" horizontal Fire Hose 5'-0" vertical, 4'-0" horizontal 3.) North 36"x 12" reaister in RAB 8B P2028-SB 0'-2" vertical, 3'-3" horizontal C202 -SB l'-0" vertical, 3'-3" horizontal' P202C-SB O'-3" vertical, 9'-7" horizontal C201A-SB O'-3" vertical, 11'-11" horizontal l
4.) South 36"x 12" recister in RAB 88 C202 -SB l'-0" vertical, 2'-8" horizontal' C201 -SB.
I' 3" vertical, O'-4" horizontal C201A-SB O'-3" vertical, 6'-1" horizontal P202C-SB O'-3" vertical, 8'-5" horizontal 4.
Provide'a description of the shortest distances between redundant safe shutdown equipment (including cabling), considering the pathway through the duct.
DESCRIPTION:
Safety-related 480V MCC 3B313-S is located immediately beneath the portion:of the duct branch located in fire area RAB 8B. Within 20' of the registers in fire area RAB 8B are _the safety-related 480V SWGR 3B31-S and the 4.16KV SWGR 3B3-S. The redundant equipment-for thes'e-cabinets is located in RAB 8A Switchgear 'A' area (approximate coordinates-10A-11A and 13'-0" N/G)-more than 70' to the south through RAB BC (Switchgear 'AB' Area).
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Provide fire protection and sprinkler system as-built drawings for 5.
fire areas 8B and 8C.
DESCRIPTION:
The following fire protection and sprinkler system as-built drawings are Attached:
1564 G859 s01 rev 18, "HVAC Reactor Auxiliary Building Plan EL +21" 5817 6382 rev 07, "RAB Sprinkler Sys FP-M25B&M30A Switchgear B" i
5817 6383 rev 02, " Detector Layout RAB Sys FP-M25B Switchgear Area B sheet 1" 5817 6384 rev 02, " Detector Layout RAB 'ys FP-M25B Switchgear Area B sheet 2" 5817 6385 rev 07, "RAB Sprinkler Sys FP-M25B Switchgear Area B" 5817 6337 rev 07, "RAB Multicycle Sprinkler Sys FP-M30A Switchgear Areas A & AB" 5817 6338 rev 03, " Detector Layout RAB Sys FP-M30A Switchgear Areas A & AB" 5817 1812
~rev 10, " Detector Layout RAB sheet.2 of 9"
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.g OVERSIZE DOCUMENT PAGE PULLED SEE APERTURE CARDS NUMBER OF OVERSIZE PAGES FILMED ON APERTURE CARDS 9't
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A9I APERTURE CARD /HARD COPY AVAILABLE FROM RECORDS AND REPORTS MANAGEMENT BRANCH
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