ML20054F871
| ML20054F871 | |
| Person / Time | |
|---|---|
| Site: | Summer  |
| Issue date: | 06/11/1982 |
| From: | Dixon O SOUTH CAROLINA ELECTRIC & GAS CO. |
| To: | Harold Denton Office of Nuclear Reactor Regulation |
| References | |
| NUDOCS 8206180054 | |
| Download: ML20054F871 (13) | |
Text
.
SOUTH CAROUNA ELECTRIC & GAS COMPANY poe t o. a.c r mo = - 4 Co6 uus.a. SouTM C Anov>4a 29218 l
O W. Dmo *4. Jm.
l vca Pa,s.reeor Nuctsaa Oes=4voe.e June 11, 1982 Mr. Harold R. Dentcn, Director Office of Nuclear Reactor Regulation U. S. Nuclear Regulatory Comnissicn Washington, D.C.
20555
Subject:
Virgil C. Summer Nuclear Station Docket No. 50/395 Fire Protection
Dear Mr. Denton:
On April 20, 1982, South Carolina Electric & Gas Ccxrpany (SCE&G) sent a letter to the NBC concernirg installation of fire detectors in areas of the Virgil C. Sumner Nuclear Station containing safety related and/or safe shutdown equipment. Durirg May 17 - 18, 1982, an NIC fire protection review team visited Su:mur Station to survey the various areas pertaining to installation of fire detectors. Durity this survey, SCE&G requestal that the NRC re-evaluate the need for detectors in areas where new detectors were to be installed. To facilitate this re-evaluaticn the followirg informaticn is provided.
Table A, attached, lists rocrns/ areas for which an exemption frczn the requirement to install detectors is requested. Table B, attached, lists location for Wiich an exemption from the requirennnt to install detectors has already been requestal in our letter of April 20, 1982. Both tables show whether there is safe shutdown and/or safety related equipnent in each
/
roont area. The remarks colunn indicates the type of equipnent present. Table A shows estimated fire loading for each room / area. Please note that cable in conduit (CND) was included in tre fire loading. Fire propagation in conduit is highly inprobable due to the limited supply of oxygen; therefore, a large degree of conservatisn is built into the fire loadings.
In sone cases, the safe shutdown and/or safety related equignent consists of pipes and tanks filled with water.
It is inconceivable that pipes and tanks filled with water could fail due to fire with the small fire loadings in the rooms / areas under consideration.
Rooms 82-02/3 in the Ccntrol Building house redundant trains of chilled water piping. With tin total fire loadiry in this area havirg a fire severity of less than 30 minutes, it is concitried that a fire in this area could not lisable the piping.
QD 3206180054 820611
'DR ADOCK 05000395 PDR
Mr. Harold Denton June 11, 1982 Page 2 In the Auxiliary Building, the fire loading in each rom / area listed is less than 10,000 Btu /ft2 with the exception of room 12-02, which has a loading 2
of 48,300 Btu /ft. Room 12-02 houses a single train of reactor building spray piping, with a fire severity of less than 40 minutes.
It is concluded that a fire in rom 12-02 could not disable the piping. Room 63-06 houses redundant boric acid tanks and associated piping. The fire load is contained in conduit.
With essentially no fire loading other than the small amount in conduit, it is concluded that the tanks ard pipes could not be disabled by a fire in this area.
AcMitionally, the refueling water storage tank located outdoors provides an alternate (redundant) source of borated water.
In the Intemediate Building, the fire loading in each roan / area listed is less than 40,000 Btu /ft2 with the exceptions of rooms 63-03 and 12-09. 'Ihese roms have fire loadings of 50,300 Btu /ft2 and 50,500 Btu /ft2 respectively, corresponding to a fire severity of less than 40 minutes. Each of these two rooms contains a single train of safe shutdown cable.
In the Diesel Generator Building, the fire loading in each room / area listed 2
is less than 20,000 Btu /ft, which corresponds to a fire severity of 15 minutes.
In the Service Water Punp House, room 25-03 has a fire loading of 8,700 2
Btu /ft. 'lhis corresponds to a fire severity of less than 10 minutes. 'Ihe C train cable is locatal inside conduit. With the extremely low fire loading, it is concluded that it is inprobable that a fire would disable both trains of safe shutdown cable in rom 25-03.
In the course of reviewing new fire detection requirements, s m e errors were noted in the table which was attached to our letter of April 20, 1982.
Specifically, Ccntrol Building rooms 12-02, 12-03, 36-01 and 48-01 are presently provided with heat detectors and therefore no new detection is required.
If you have additional questions, please let us know.
Very truly yours
$w O. W. Dixon, Vice President Nuclear Operations l
GW:OWD:tdh
,c : Page three l
i
. Mr. Harold Denton June 11, 1982 Page 3 I
cc:
V. C, Sumner
'i G. H. Fischer H. N. Cyrus T. C. Nichols, Jr.
M. B. Whitaker, Jr.
J. P. O'Reilly H. T. Babb D. A. Naunan C. L. Ligcn (NSIC) j W. A. Williams, Jr.
R. B. Clary O. S. Bradham A. R. Koan H. N. Browne G. J. Braddick i
J. C. Ruoff J. L. Skolds J. B. Knotts B. A. Bursey NPCF File f
e b
l t
1 3
1 1
Page 1 of 7 T OLE A Vir p 1 C. "mmer Nuclear Station Smoke Detection E QUIPMENT ESTIMATED FIRE LOADING (BTUNT 2)
SAFE SHUTDOWN DITR CABLE IN REDUNDANT SINGLE SAFEIY DR A'11NG BLDC.
ELEV.
RM NO.
CONDUIT OTHER TOTAL TRAINS TRAIN RELATED REMARKS E -02 3-018 CB 482 82-01/04 21,100 5,900*
27,000*
No Yes B-Chilled Water Pipinq B-Tray B-Charcoal filters B-Fans & Docts B-CND 82-02/0J 21,200 10,000*
31,200*
Yes A & B Chilled Water Pipinq A-Trey A-Charcoal Filters A-Fans & Ducts A-CNC E -023-Oll AB 475 75-01 3,000 0
3,000 No No Yes A-CND B-CND 463 63-07 5,000 0
5,000 No Yes B-CND 63-06 5,000 0
5,000 Yes A & B Boric Acid Tanks & Associated Piping /A,E & D-CND 63-08A 5,000 0*
5,000*
No No Yes FHB Charcoal filter-C 63-088 5,000 0'
5,000*
No No Yes FHB Charcoal filter-B 63-08C 5,000 0*
5,000*
No No Yes FHB Charcoal filter-A E -023-008 AE 436 36-08 5,000 0
5,000 No No Yes Instrumentation 36-33 7,700 1,000 8,700 Yes SW Piping A.B. E-CND 36-13 5,000 0
5,000 No Yes MO Valve 8104 CS Piping 3 CND
- Chircoal in charcoal Filters not included. Charcoal filters are provided with water deluge suppression and with heat detectim.
Page 2 of 7 TABLE A Virgil C. Summer Nuclear Station Smoke Detection E QUIPMENT ESTIMATED FIRE LOADING (BTU /FT 2)
SAFE SHUTDOWN OT HER CABLE IN REDUNDANT SINGLE SAFETY DRACING BL DG.
ELEV.
RM NO.
CONDUIT OTHER TOTAL TRAINS TRAIN RELATED REMARKS E-02 3-008 AB 436 cont'c 36-14 7.700 0
7.700 No No Yes Inst rumentation 36-16 5,000 0
5,000 No Yes B-Valve 8105 B-Seal In Piping Seal Water Pipina 36-24 2,500 0
2.500 Yes SG-A Stesh Pressure Transmitters 36-26 2, 500 3, 70 0 6,200 No No Yes XDM M-9L8R & Piping E -023-006 AB 426-3 263-01 4, 000 0
4, 00 0 No No Yes WD Piping E -023-005 AB 412-0 12-02 2, 500 45,800 48,300 No Yes SP Pipe 293-01 3,300 550 3,850 Yes B-Tray /A-cc Piping /B-cc& RH Piping 12-05 B-RHR Heat Exchange /B-MO Valve 266-01 3,200 0
3, 200 Yes A-CND 3 B-RH Pipe A-RHR Heat Exchange 12-06 A-cc & RH Pipe A-MO Valve L
Page 3 of 7 TABLE A Virgil C. Summer Nuclear Station Saoke Detection EQUIPE NT ESTIMATED FIRE LOADING (BTU /FT 2)
SAFE SHUTDOWN OTER CABLE IN REDUNDANT SINGLE SAFETY DRAWING BLDG.
ELEV.
RM NO.
CONDUIT OTHER TOTAL TRAINS TRAIN RELATED REMARKS E -023-005 AB 412-0 12-12 2,500 0
2,500 No No Yes Letdown Heat Exchangst with ec & cs pipe 12-13 5,000 230 5,230 No Yes CS Pump Suction 12-14 7,700 0
7,700 No No Yes Recycle Evaporator & Associated Piping 12-20 2,500 0
2,500 No No Yes Resin Sluice Puap 19-26 7,700 0
7,700 No Yes B-Seel Inj. Pipe B-Boron Inj. Pipe 12-29 2,500 0
2,500 No No Yes Moderating Heat Exch. Piping B-CNC 12-30 5,000 0
5,000 Yes B-CND B-ec Piping A-VU Piping E-023-004 AB 400 00-01E 2,500 0
2,500 Yes A,B&C-CS Piping A-SI Piping SP&SI from RWST
1 Pqe 4 of 7 i
TABLE A Virgil C. Sussner Nuclear Station Smoke Detection EQUIPE NT ESTIMATED FIRE LOADING (BTU /FT 2)
SAFE SHUTDOWN OTER CABLE IN REDUNDANT SINGLE SAFETY DRADING BLDG.
ELEV.
RM NO.
CONDUIT OTHER TOTAL TRAINS TRAIN REL ATED REMARKS E-023-003 AB 388 00-02w 2,500 0
2,500 No Yes B-CS Piping 88-07 5,000 175 5,175 No No Yes WG Sample Line 88-14 2,500 200 2,700 No No Yes B-WG Recombiner 88-15 2,500 200 2, 700 No No Yes A-WG Recombiner 88-17 2,500 0
2,500 No No Yes B-WG Recombiner 88-18 2,500 0
2,500 No No Yes A-WG Compressor 88-21 2,500 0
2,500 No No Yes A&B Recycle Evaporator Feed Pugs E-023-002 AB 374 74-01 3,800 3,900 7,700 No Yes B-CS Pipe 74-09E 4,300 4,900 9,200 Yes 85-01/2 A VU Piping 74-07/8/5 A XAH-4A-VL 74-11/12,13 B YU Piping B -XAH-4B-VL A&8 Ducts for RHR Room Ventilation SP Line from RWST A&8 CC Lines SP Line from RWST A-CND & Trey B-CND & Trey Waste Evaporator feed Pug & Piping
Page 5 of 7 iABLE A Virgil C. Sumner Nuclear Station Smoke Detection E QUIPMENT ESTIMATED FIRE LOADING (BTU /FT 2)
SAFE SHUTDOWN OTER CABLE IN REOUNDANT SINGLE SATETY DRADING BLDC.
ELEV.
RM NO.
CONDUIT OTHER T( \\L TRAINS TRAIN RELATED REMARKS E -023-012 IB 463 63-02 13,100 17,G)0 N,100 No Yes A-Tray & CND 63-03 7,700 42,600 50,300 No Yes A-Tray & CND E -02 3-010 IB 451 51-01 7,700 7,900 15,600 Yes A&B CND A-VU Piping B-X AH-B-YL
$1-02 7,700 9,000 16,700 Yes J,K,L, H,C CND B-VU Piping B-XAH-8YL 51-03 3,000 14,900 17,500 Yes J, K,L, H, A, B CND B-VU Piping B-XAH-198-VL 51-04 5,000 1,400 6,400 Yes A-CND A&B VU Piping A-XAH-9A-VL 436 36-02 10,400 3,300 13,700 Yes fire Loading excludes area which is provided with detectors and sprinklers A,B,C,D CND A-Tray A,B,&C HS Piping B-HS Safety Valves A,B,C HS Safety Valves & solenoid A&B VU Piping A&B-solenoid AAB ce piping A-NO Valves
~
36-04 5,000 900 5, 930 Yes A-Tray A&B VU Piping e
~
Page 6 of 7 TABLE A Virgil C. Summer Nuclear Station Seoke Detection E QUIPENT fj [,
ESTIMATED FIRE LOADING (BTUNT 2) 3ME SHUTDOWN OTER
?
CABLE IN REDUNDANT SIN!1E SAFETY
~;
' /
DRAWING BLDG.
ELEV.
RM NO.
CONDUIT OTHER TOTAL TRAINS TRAIN RELATED REMARKS 7
36-05 7,700 0
7,700 No Yes C-CND 36-06 10,400 0
10,400 No Yes C-CN9 E-023-007 IB-426 26-01 10,400 14,000 24,400 Yes A-CND C-CND B-CND B-Trey
,e.
a 26-02 13,100 13,900 27,000 Yes
~
~~
A-CND C-CND-B-CND r
A N Troy
>4 412 12-03 7,700 0 -
7,700 No No Yes Batt'.' Room A Toep. Signal Conv.
I a
~.
12-04 7,700 200 7,900 No Yes A. Bett. Room A. CM)
A-Trey 12-05 32,000 6,200
.38,200 No Yes A-T ray A-Batt. Charger A-CND A. DC Distribution Peel 12-06 32,000 0
32,G)0 No Yes-B-CND B-Batt. Charger B-Tray B-DC Distribution Pariel 12-08 7,900 r200 8,100 No Yes B-CND B-Sett. Room B-Tre) 12-09 2,500 48,000 50,500 No Yes B-Trey E-023-012 DG 463 63-01
.5,000 0
5,000 No.
Yes A-DG Exhaust Piping 63-02 5,000 0
5,000 No Yes B-DG Exhaust Piping 447-3 North 7,700 0
7,700 No Yes B-DG Stpply Air F es South 7,700 0
7,700
.No Yes A. DG Supply Air Fans
n Page 7 of 7 TABLE A Virgil C. Suwr Nuclear Station Smoke Detection EQUIPMENT ESTIMATED FIRE LOADING (BTU /FT 2)
SAFE SHUTDOWN OTER CABLE IN REDUNDANT SINGLE SAFETY DRADING
- BLDG, ELEV.
RM NO.
CONDUIT OTHER TOTAL TRAINS TRAIN RELATED REMARKS E-023-007 DG 427 27-01/4 10,400 8,800 19,200 No Yes A-CNO A-Trey A-DG F.D. Pump 27-02/3 10,000 8,900 18,900 No Yes B-CND B-Tray N
B-DG f.0. Pump 400 00-01 3,000 15,200 18,200 Yes A-Trey A-SW Piping A & B Pipino from Condensate Tank 00-02 2,500 15,000 17,500 No Yes B-Tray E-023-023 SWPH 425 25-03 5,000 3,700 8,700 Yes C-CND A-Trey A-CND A-SW Pipe
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