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June 11, 1982

Mr. Harold R. Dentcn, DirectorOffice of Nuclear Reactor RegulationU. S. Nuclear Regulatory ComnissicnWashington, D.C. 20555

Subject: Virgil C. Summer Nuclear StationDocket No. 50/395Fire Protection

Dear Mr. Denton:

On April 20, 1982, South Carolina Electric & Gas Ccxrpany (SCE&G) sent aletter to the NBC concernirg installation of fire detectors in areas of theVirgil C. Sumner Nuclear Station containing safety related and/or safe shutdownequipment. Durirg May 17 - 18, 1982, an NIC fire protection review teamvisited Su:mur Station to survey the various areas pertaining to installationof fire detectors. Durity this survey, SCE&G requestal that the NRCre-evaluate the need for detectors in areas where new detectors were to beinstalled. To facilitate this re-evaluaticn the followirg informaticn isprovided.

Table A, attached, lists rocrns/ areas for which an exemption frczn therequirement to install detectors is requested. Table B, attached, listslocation for Wiich an exemption from the requirennnt to install detectors hasalready been requestal in our letter of April 20, 1982. Both tables showwhether there is safe shutdown and/or safety related equipnent in each

/roont area. The remarks colunn indicates the type of equipnent present. TableA shows estimated fire loading for each room / area. Please note that cable inconduit (CND) was included in tre fire loading. Fire propagation in conduit ishighly inprobable due to the limited supply of oxygen; therefore, a largedegree of conservatisn is built into the fire loadings.

In sone cases, the safe shutdown and/or safety related equignent consistsof pipes and tanks filled with water. It is inconceivable that pipes and tanksfilled with water could fail due to fire with the small fire loadings in therooms / areas under consideration.

Rooms 82-02/3 in the Ccntrol Building house redundant trains of chilledwater piping. With tin total fire loadiry in this area havirg a fire severityof less than 30 minutes, it is concitried that a fire in this area could notlisable the piping.

QD

3206180054 820611'DR ADOCK 05000395* PDR

,

. , -

Mr. Harold DentonJune 11, 1982Page 2

In the Auxiliary Building, the fire loading in each rom / area listed isless than 10,000 Btu /ft2 with the exception of room 12-02, which has a loading

2of 48,300 Btu /ft . Room 12-02 houses a single train of reactor building spraypiping, with a fire severity of less than 40 minutes. It is concluded that afire in rom 12-02 could not disable the piping. Room 63-06 houses redundantboric 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 isconcluded that the tanks ard pipes could not be disabled by a fire in this area.AcMitionally, the refueling water storage tank located outdoors provides analternate (redundant) source of borated water.

In the Intemediate Building, the fire loading in each roan / area listed isless than 40,000 Btu /ft2 with the exceptions of rooms 63-03 and 12-09. 'Iheseroms 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 tworooms contains a single train of safe shutdown cable.

In the Diesel Generator Building, the fire loading in each room / area listed2is 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 8,7002Btu /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, itis concluded that it is inprobable that a fire would disable both trains of safeshutdown cable in rom 25-03.

In the course of reviewing new fire detection requirements, s m e errorswere 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 presentlyprovided 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 PresidentNuclear Operations,

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_ _ - . . ._ _ ,

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. Mr. Harold DentonJune 11, 1982Page 3

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cc: V. C, Sumner 'iG. H. FischerH. N. CyrusT. C. Nichols, Jr.

'M. B. Whitaker, Jr.J. P. O'ReillyH. T. BabbD. A. NaunanC. L. Ligcn (NSIC)

j W. A. Williams, Jr.R. B. Clary

'

O. S. Bradham,

A. R. KoanH. N. BrowneG. J. Braddick

i J. C. RuoffJ. L. SkoldsJ. B. Knotts,

: B. A. BurseyNPCFFile

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Page 1 of 7T OLE A

Vir p 1 C. "mmer Nuclear Station Smoke Detection

E QUIPMENT

ESTIMATED FIRE LOADING (BTUNT 2) SAFE SHUTDOWN DITRCABLE 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 filtersB- 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- CNDB- 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 & AssociatedPiping /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 PipingA.B. E- CND

36-13 5,000 0 5,000 No Yes MO Valve 8104CS Piping3 CND

*Chircoal in charcoal Filters not included. Charcoal filters are provided with water deluge suppression and with heat detectim.

.

Page 2 of 7TABLE A

Virgil C. Summer Nuclear Station Smoke Detection

E QUIPMENT

ESTIMATED FIRE LOADING (BTU /FT 2) SAFE SHUTDOWN OT HER

CABLE IN REDUNDANT SINGLE SAFETYDRACING BL DG. ELEV. RM NO. CONDUIT OTHER TOTAL TRAINS TRAIN RELATED REMARKSE-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 8105B- Seal In PipingSeal Water Pipina

36-24 2,500 0 2.500 Yes SG-A Stesh Pressure Transmitters36-26 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 Piping12-05 B- RHR Heat Exchange /B- MO Valve

266-01 3,200 0 3, 200 Yes A- CND 3 B-RH Pipe A- RHR Heat Exchange12-06 A- cc & RH Pipe A- MO Valve

L

Page 3 of 7TABLE A

Virgil C. Summer Nuclear Station Saoke Detection

EQUIPE NTESTIMATED FIRE LOADING (BTU /FT 2) SAFE SHUTDOWN OTERCABLE IN REDUNDANT SINGLE SAFETY

DRAWING BLDG. ELEV. RM NO. CONDUIT OTHER TOTAL TRAINS TRAIN RELATED REMARKSE -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. PipingB- CNC

!' 12-30 5,000 0 5,000 Yes

B- CNDB- ec PipingA- VU Piping

E-023-004 AB 400 00-01E 2,500 0 2,500 Yes A,B&C- CS PipingA- SI PipingSP&SI from RWST

. -

_ _ . _. '

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Pqe 4 of 7 i

TABLE AVirgil C. Sussner Nuclear Station Smoke Detection

EQUIPE NTESTIMATED FIRE LOADING (BTU /FT 2) SAFE SHUTDOWN OTERCABLE IN REDUNDANT SINGLE SAFETY

DRADING BLDG. ELEV. RM NO. CONDUIT OTHER TOTAL TRAINS TRAIN REL ATED REMARKSE-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 Yes85-01/2 A VU Piping

74-07/8/5 A XAH-4A-VL74-11/12,13 B YU Piping

B -XAH-4B-VL

A&8 Ducts for RHR Room VentilationSP Line from RWSTA&8 CC LinesSP Line from RWST

A- CND & TreyB- CND & TreyWaste Evaporator feed Pug & Piping

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Page 5 of 7iABLE A

Virgil C. Sumner Nuclear Station Smoke Detection

E QUIPMENT

ESTIMATED FIRE LOADING (BTU /FT 2) SAFE SHUTDOWN OTERCABLE IN REOUNDANT SINGLE SATETY

DRADING BLDC. ELEV. RM NO. CONDUIT OTHER T( \L TRAINS TRAIN RELATED REMARKSE -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 CNDA-VU PipingB-X AH-B-YL

$1-02 7,700 9,000 16,700 Yes J,K,L, H,C CNDB-VU PipingB- XAH-8YL

51-03 3,000 14,900 17,500 Yes J, K,L , H, A, B CNDB- VU PipingB- XAH-198-VL

51-04 5,000 1,400 6,400 Yes A- CNDA&B VU PipingA- XAH-9A-VL

436 36-02 10,400 3,300 13,700 Yes fire Loading excludes area which is provided withdetectors and sprinklersA,B,C,D CNDA- Tray

A,B,&C HS PipingB-HS Safety ValvesA,B,C HS Safety Valves & solenoidA&B VU PipingA&B- solenoidAAB ce piping

'

A-NO Valves'

~36-04 5,000 900 5, 930

. Yes A- TrayA&B VU Piping

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_ . _ _ . _ . - _ . _ _ _ _ . _ _ _ _ ... .

Page 6 of 7TABLE 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- CNDB- CND B- Trey

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26-02 13,100 13,900 27,000 Yes~ ~~

A- CND C-CND-'

B- CNDr

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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. ChargerB- Tray B- DC Distribution Pariel

12-08 7,900 r200 8,100 No Yes B- CND B- Sett. RoomB- 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

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Page 7 of 7TABLE A

Virgil C. Suwr Nuclear Station Smoke Detection

EQUIPMENTESTIMATED FIRE LOADING (BTU /FT 2) SAFE SHUTDOWN OTERCABLE IN REDUNDANT SINGLE SAFETY

DRADING BLDG, ELEV. RM NO. CONDUIT OTHER TOTAL TRAINS TRAIN RELATED REMARKSE-023-007 DG 427 27-01/4 10,400 8,800 19,200 No Yes A- CNO

A- TreyA- DG F.D. Pump

27-02/3 10,000 8,900 18,900 No Yes B- CNDB- Tray N

B-DG f.0. Pump

400 00-01 3,000 15,200 18,200 Yes A- Trey

A- SW PipingA & 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- TreyA- CND A- SW Pipe

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