ML20041C612

To Fire Protection Evaluation

ML20041C612
Person / Time
Site:	Summer
Issue date:	02/23/1982
From:	SOUTH CAROLINA ELECTRIC & GAS CO.
To:
Shared Package
ML20041C610	List: ML20041C609 ML20041C612
References
NUDOCS 8203020385
Download: ML20041C612 (35)

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{{#Wiki_filter:- REVISION 8 FIRE PROTECTION EVALUATION VIRGIL C. SUMMER NUCLEAR STATION UNIT 1 Pages listed below should be removed for disposal. Revised replacement pages are provided for insertion. All revised pages and drawings are marked i " Revision 8 2/23/81," and revised material is marked by side bars on the new text pages. l Revised Text Pages Revised and Replacement Drawings ii E-023-001 4.2-20 E-023-004 4.2-21 E-023-005 m 4.2-22 E-023-007 4.0 24 E-023-008 4.2-26 E-023-010 4.2-32 E-023-018 4.4-17 E-023-021 4.4-18 E-023-023 4.4-20 4.4-27 4.4-28 4.4-29 Revis-d NRC Question Pages 4.4-33 4.4-41 Q1-20 4.4-55 Q1-21 4.5-22 Q1-22 5.0-29b 5.0-31a 5.0-32 5.0-32a 5.0-36 5.0-41 Geert /Commoneesith KokO[jj5 PDR

() TABLE OF CONTENTS (Cont'd) Section Title Page 4.2.3 Subbasement, Zone 2, Elevation 388'-0" 4.2-10 4.2.4 Recirculation Valve Room, Zone 3, Elevation 397'-0" 4.2-14 4.2.5 Charging Pump Room Cooling Units Room, Zone 4, Elevation 400'-0" 4.2-16 4.2.6 Basement, Zone 5, Elevation 412'-0" 4.2-18 4.2.7 Mezzanine Level, Zone 6, Elevation 436'-0" 4.2-22 4.2.8 Solid Waste Drumming Station, Zone 7, Elevations 436'-0" And 447'-0" 4.2-26 l 4.2.9 Hot Machine Shop, Zone 8, Elevation 436'-0" 4.2-28 4.2.10 Operating Floor, Zone 9, Elevation 463'-0" 4.2-30 4.2.11 Ventilation Equipment Level, Zone 10, Elevation 485'-0" 4.2-34 4.3 FUEL HANDLING BUILDING 4.3-1 4.3.1 General Description 4.3-1 4.3.2 Boron Injection Tank Room, Zone 1, Elevation 412'-0" 4.3-3 4.3.3 Basement, Zone 2, Elevations 412'-9" and 424'-0" 4.3-4 4.3.4 Mezzanine Level, Zone 3, Elevation 436'-0" 4.3-6 4.3.5 Operating Floor, Zone 4, Elevation 463'-0" 4.3-8 4.4 INTERMEDIATE BUILDING 4.4-1 4.4.1 General Description 4.4-1 l 4.4.2 Station D-C Power Supply Area, Fire Areas IB-1 through IB-6, Elevation 412'-0" 4.4-6 4.4.3 HVAC Water Chiller Equipment Area, Zone 1 and Fire Areas IB-7 through IB-9, Elevation 412'-0" 4.4-10 4.4.4 Turbine Driven Emergency Feedwater Pump Room, Zone 2, Elevation 412'-0" 4.4-14 4.4.5 East Penetration Access Area, Zone 3, Elevation 412'-0" 4.4-17 4.4.6 West Penetration Access Area, Zone 4, Elevation 412'-0" 4.4-19 4.4.7 General Floor Area, Zone 5, Elevation 412'-0" 4.4-21 4.4.8 Battery Room Ventilation Equipment Rooms A and B, Fire Area IB-10 and Zone 6, Elevation 423'-0" 4.4-28 4.4.9 Service Water Booster Pump Area Cooling Equipment Rooms A and B, Zone 7 and Fire Area IB-11, Elevation 426'-0" 4.4-31 4.4.10 Switchgear Room B, Zone 8, Elevation 436'-0" 4.4-35 4.4.11 Speed Switch Rooms A, B and C, Zone 9 and Fire Areas IB-12 and IB-13, Elevation 436'-0" 4.4-37 4.4.12 Control Room Evacuation Panel Rooms and Switchgear Room, Fire Areas IB-14 IB-15, and 15A, Elevation 436'-0" 4.4-40 4.4.13 East Penetration Access Area, Zone 10, Elevation 436'-0" 4.4-43 4.4.14 West Penetration Access Area, Zone 11, Elevation 436'-0" 4.4-45 4.4.15 General Floor Area, Zone 12, Elevation 436'-0" 4.4-47 4.4.16 Switchgear Cooling Unit Rooms A and B, Fire Areas IB-16 and IB-17, Elevation 451'-0" 4.4-50 Os 4.4.17 Speed Switch Room Cooling Unit Rooms A and B, Fire Areas IB-18 and IB-19, Elevation 451'-0" 4.4-53 G. tert /Commonweeth ii Revision 8 2/23/82 J

e. Auxiliary building motor control center and switchgear areas cooling systems. Ventilation systems listed in items a through d, above, are discussed briefly in Section 4.2.1. One local air cooling unit is provided to recirculate and cool air for the electrical equipment room (room 12-28). Additional ventilation system details are presented in Section 9.4 of the FSAR. Safe shutdown equipment within this zone consists of the following: a. RHR heat exchangers A and B. b. Engineered safety features motor control center. c. Safety related cables. d. Safe shutdown instrumentation. O Gdbert/C. 1 4.2-20 Revision 8 2/23/82.

I ("'s Fire suppression equipment consists of portable fire extinguishers V and interior manual hose as shown by Drawings E-023-005 and E-023-006. 4.2.6.2 Analysis A' redundant motor control center is located on the operating floor, elevation 463'-0", of the auxiliary building. Redundant safety related cable routed through this zone is separated in accordance with plant separation criteria. One RER heat exchanger is required for safe shutdown operation. Tbe RHR heat exchangers are separated by a two foot thick concrete wall. There are no cable trays which span both RHR heat exchanger rooms. Additionally, the fire loading of the RHR heat exchanger rooms and (} adjacent rooms is low. For these reasons, the location of both RHR heat exchangers within this zone does not represent a potential o hazard to safe shutdown. Potential sources for release of radioactive materials within this zone include the waste evaporator, recycle evaporator, recycle holdup tanks, spent resin storage tanks, waste concentrates holdup tank and miscellaneots small pumps and piping. Should liquid be released within this zone, the drain system is designed to route drainage to the liquid waste disposal system. The auxiliary building charcoal exhaust system is provided to limit airborne releases. O V Gdbert /C-rl-4.2-21 Revision 8 2/23/87

() Safe shutdown equipment located in this zone consists of the following: a. Boric acid transfer pumps A and B. b. Safety related cables. I c. Safe shutdown instrumentation. Fire detection equipment for this zone consists of ionization detectors in the electrical equipment area (room 36-18) and over the boric acid transfer pumps (rooms 52-01 and 52-02) which actuate i alarms in the control room. Fire suppression equipment within this zone consists of a manual sprinkler system for the truck bay. In addition, portable fire extinguishers and interior manual hose as shown by Drawing E-023-008. i () Gdbert/L. 4.2-24 Revision 8 2/23/82

t j Combustibles within this zone consist of the following: a. Lubricating oil, 637,500 Btu. b. Cable insulation 440,000,000 Btu. j l Total zone Btu content is 440,637,500 Btu. Zone fire loading is 31,500 Btu /ft. a 4.2.7.3 Conclusion l The objective for this zone is to prevent a fire from damaging redundant safe shutdown equipment. This objective is achieve'd by the current design through adequate separation of redundant equipment and low fire loading. O 4.2.8 Solid Waste Drumming Station, Zone 7, Elevations 436'-0" And 447'-0"- 3 2 4.2.8.1 Description This zone (room 36-17), shown by Drawings E-023-008 and E-023-021, is denoted by east-west column lines 7.7 and 9.5 and north-south column lines P and R. It is bounded on the east,, south and west by the mezzanine level, elevation 436'-0", of the auxiliary building and on the north by the hot machine shop, i ~ This zone houses solid waste drumming equipment. Walls, floors and ceiling are constructed of reinforced concrete. Except for unprotected openings, these structures provide three hour i rated fire barriers. Electrical penetrations in the floor and ceiling are sealed. !O Geert/Commonerann 4.2-26 Revision 8 2/23/82 j y. t.w -.-

d i Fire detection equipment for this zone consists of ionization 1 i detectors in switchgear room 63-01 and corridors 63-16. and 63-19 and continuous thermistor sensors for the charcoal filter beds, which actuate alarms in the control room. Fire suppression equipment consists of a preaction sprinkler system for a part of.this zone, portable fire extinguishers, and interior manual hose as shown by Drawing E-023-011 and a manual deluge system for the charcoal filters. 4.2.10.2 Analysis Functional tedundancy for the 480 volt switchgear is provided by ~ switchgear located in the intermediate building. Functional 4 redundancy for the motor control center is provided by a motor control center in the basement. Redundant safety related cables are separated in accordance with plant separation criteria, i A i ^.\\ s. s i 1 ) 'e <~ a , u < ^ t.

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/ GilbertICommonwealth j 4.2-32 Revision 8 2/23/82 I \\ i - '/ 'l ?5 . ~

Combustibles within this room consist of turbine and pt np lubricating oil with a total Btu content of 5,624,000 Btu. Total room fire 2 loading is 13,100 Btu /ft, 4.4.4.3 Conclusion The objective for this room is-to ensure that a fire within the room does not spread. This objective is achieved by the current design since this room is protected by a preaction sprinkler system, enclosed by walls having a two hour fire resistance rating and the room fire loading requires only a 30 minute fire resistance rating. 4.4.5 East Penetration Access Area, Zone 3, Elevation 412'-0" 4.4.5.1 Description This fire zone (room 12-02), shown by Drawing E-023-007, is located just outside the reactor building in the southeast quadrant at elevation 412'-0" of the intermediate building. This zone is bounded on the northwest by the reactor building; on the north by a tendon access pit and a short outside wall; on the east by an outside wall; and on the south and west by the intermediate building. This zone provides space for access to the outside ends of reactor building penetrations and routing of piping and cables. Walls surrounding this zone are constructed of reinforced concrete. These walls provide three hour fire rated barriers. The floor is of l reinforced concrete on grade. The ceiling is constructed of reinforced concrete supported by protected steel with a one hour fire resistance rating. O Geert/Commonosasth 4.4-17 Revision 8 2/23/82

The doorways in the north and west walls are protected by Class A fire doors. Other wall penetrations are sealed except for the three inch void space between the west wall and the reactor building. Floor drains are provided in this zone, all of which drain to a sump located within the zone. Electrical penetrations in the ceiling are sealed. Other ceiling penetrations are not scaled since vent area from the floor above (elevation 436'-0") is required in the event of high energy line rupture. Ventilation of this zone is provided by two fans located within the zone. These fans circulate outside air or recirculate zone air depending upon the position of dampers in the fan suction ducting. Air is relieved to the floor above through the unsealed ceiling penetrations and then to the outside through exhaust fans discharging into the plant vent. Additional ventilation system details are presented in FSAR Section 9.4. Safe shutdown equipment located within this zone consists of reactor protection system cables. Fire detection equipment for this zone consists of area ionization detectors which actuate control room alarms. Fire suppression equipment consists of portable fire extinguishers and interior manual hose as shown by Drawing E-023-007. { 4.4.5.2 Analysis Cables for two channels of the reactor protection system are routed through this zone to two separate electrical penetrations in the reactor building wall. These penetrations and cables are separated in accordance with plant separation criteria. G.Ibert /Commonweau j 1 4.4-18 Revision S 2/23/82

satisfies requirements for a three hour fire resistance rating. Doorways between this zone and adjacent fire areas / zones are protected by Class A fire doors. Other wall penetrations are sealed except for the three inch void space between the reactor building wall and the zone perimeter wall in the southwest quadrant. Floor drains in this zone drain through a common header to the floor drain tank in the auxiliary building. The common header is configured to form a trap where it enters the auxiliary building. Ceiling penetrations are not sealed s'uce vent area from the floor above (elevation 436'-0") is required in the event of high energy line rupture. Ventilation of this zone is provided by two fans located within ti e zone. These fans circulate outside air or recirculate zone air O depending upon the position of dampers in the fan suction ducting. l Air is relieved to the floor above through the unsealed ceiling penetrations and then to the outside through exhaust fans discharging into the plant vent. Additional ventilation system details are presented in Section 9.4 of the FSAR. Safe shutdown equipment located in this zone consists of safety related cables. Also located in this zone is the charging pump flow transmitter which indicates charging pump flow on the control room evacuation panel and in the control room. Fire detection equipment for this zone consists of area ionization detectors which actuate alarms in the control room. Fire suppression equipment consists of portable fire extinguishers and interior manual hose as shown by Drawing E-023-005. caestr = 4.4-20 Revision 8 2/23/82

,L i j The motor driven emergency feedwater pumps are adequately separated i and contain only a small quantity of lubricating oil (three quarts I per pump). The emergency feedwater pump cooling units are adequately separated and contain essentially no combustibles. There are no cable trays t i located above these cooling units. ~i A significant quantity of cable is located in trays in the northern and western segments of this zone. These cable trays are primarily part of safety related channel B but include some associated circuits. These cable trays are separated spatially or by physical i barriers in accordance with plant separation criteria (see Section 3.0). Trays are located above both service water booster pumps. The ) "B" cable trays are separated from the "A" service water booster / pump by an "M" board horizontal fire barrier. However, because of the distance between these pumps,the horizontal fire barrier and the fire suppression and fire alarms, a cable fire which could damage both pumps prior to detection and extinguishment is not considered f credible. 4 'f j Combustibles within this zone consist of the following: a. Lubricating oil, 1,145,000 Btu. b. Cable insulation, 470,000,000 Btu. Total Btu content of this zone is 471,145,000 Btu. Total zone fire [} loading is 43,000 Btu /ft l Gittet/ Commonwealth i 4.4-27 Revision 8 2/23/82 .,.__,_.._.,.,__._-,__,m., . ~,

4.4.7.3 Conclusion The objective for this zone is to prevent equipment damage as a result of fire, which could adversely affect safe shutdown capability. This objective is achieved through current design since this area is protected by a preaction sprinkler system and adequate separation of equipment. Additionally, the fire loading of this zone is low. 4.4.8 Battery Room Ventilation Equipment Rooms A and B, Fire Area IB-10 and Zone 6, Elevation 423'-0" 4.4.8.1 Description Battery room ventilation equipment rooms A (room 23-02) and B (room 23-01), shown by Drawing E-023-007, Auxiliary Plan A, are located on a partial floor at elevation 423'-0" in the southwest corner of the O intermediate building above the station d-c power supply area. These two rooms are bounded on the north and east by the general floor area; on the south by the turbine building; and on the west by the control building. These two rooms house battery room ventilation system air handling units A and B, one unit in each room, and battery room e naust fans A and B, one fan in each room. Walls surrounding these two rooms are of rein.?orced concrete. The interior wall separating the rooms is also reinforced concrete. These walls provide a three hour rated fire barrier. The floor is of reinforced concrete. The ceiling is also of reinforced concrete which, except for a covered hatch in room B, would provide a thrta hour rated fire barrier. Doorways between these rooms and adjacent , Geert/L 4.4-28 Revision 8 2/23/82

_ ~_.__ -_ -= t i fire areas / zones and the doorways between these rooms are protected by Class A fire doors. Other wall penetrations are sealed. Ventilation ducts are equipped with fire dampers, actuated by fusible i links, to isolate these rooms should a fire occur. A single floor drain is provided for each room. These drains connect below the f floor to form a single line to the sump located in battery room A at elevation 412'-0". Ventilation for these rooms is provided by the battery room ventilation system air handling units located in these spaces. This sy' stem is discussed in Section 4.4.2.1. Additional ventilation system details are presented in Section 9.4 of the FSAR. Safe shutdown equipment located within these rooms is as follows: r a. Battery room air handling unit A and exhaust air fan A, located in room A. b. Battery room air handling unit B and exhaust air fan B, located in room B. c. Safety related cables to 7200 volt switchgear B located at I elevation 436'-0". These cables are routed through both rooms. Fire detection equipment for these rooms consists of ionization l l detectors in each battery room ventilation equipment room. These i detectors alarm in the control room. Fire suppression equipment consists of portable fire extinguishers and interior manual hose as shownbyDrawingE-023-00h.

O Gdtws/C_

? 4.4-29 Revis' -8 2/23/82 i ~.

() c. Service water booster pump area cooling unit B, located in room B. d. Safety related channel B cables, located in room B. Fire suppression equipment consists of portable fire extinguishers and interior manual hose as shown by Drawing E-023-007. 4.4.9.2 Analysis The service water booster pump area cooling units are redundant. One of these cooling units is adequate for safe shutdown operation. However, each cooling unit is related to a specific service water booster pump. In addition to the cooling provided by the cooling units, air is circulated through the service water booster pump {} portion of the general floor area by 'the intermediate building ventilation system. This air flow removes some heat but the intermediate building ventilation system is not safety related and is not operable under loss of offsite power conditions. Each of the service water booster pump cooling units is located in a separate room formed by walls having a three hour fire resistance rating. Also each room contains only cables of one safety related channel (i.e., channel A cables in room A). 2 I i i ' O I Geert/Commonween l 4.4-33 Revision 8 2/23/82

These rooms house the control room excavation panels which provide alternate means for control of various plant equipment required for shutdown should the control room become uninhabitable, and nonsafety related switchgear. The north and west walls of this building area are of reinforced concrete. The east and south walls and the wall separating the rooms are of drywall construction. These walls provide three hour rated fire barriers. The floor and ceiling are of reinforced concrete and also provide three hour rated fire barriers. Doorways between these rooms and adjacent fire areas / zones are protected by Class A fire doors. Other wall, floor and ceiling penetrations are sealed. Ventilation openings are equipped with fire dampers actuated by fusible links. O Ventilation for these rooms is provided by the speed switch rooms cooling system discussed in Section 4.4.11.1. Safe shutdown equipment located within these rooms is as follows: a. Control room excavation panel A in room 36-03A. i b. Safety related channel A cables and reactor protection l l underfrequency and undervoltage relay and transformer panels I, l l II and III in room 36-03B. c. Control room evacuation panel B and control room evacuation panel B power supply panel in room 36-03. l Fire detection equipment for control room evacuation panel rooms A and B and reactor protection underfrequency and undervoltage relay and transformer panels I, II, and III in room 36-03B consists of ionization detectors which actuate alarms in the control room. wc_ 4.4-41 Revision S 2/23/82

O 4.4.17.2 Analysis The two speed switch room cooling units are redundant in that one unit serves train A equipment, one unit serves train B equipment and either unit can serve train C equipment. Only one cooling unit is required for safe shutdown operation. Separation is accomplished by enclosure of equipment in separate rooms divided by a wall having a two hour fire resistance rating and surrounded by walls having two or three hour fire resistance ratings (west wall two hour; others three hour). The B cooling unit and safety related channel A cables in room B are separated by a distance of six feet and with either a 1 or 3 hour fire rated barrier. In view of the low room B fire load, this represents adequate separation. Combustibles within these two rooms consist primarily of the cable insulation in room B. Btu content of room B is 800,000 Btu. Room B fire loading is 3,700 Btu /ft The speed switch room cooling units contain almost no combustible material (small quantities of cable and motor insulation). Power and control cables for the cooling units I are routed through individual conduit. Thus, the room has essentially no fire loading. 4.4.17.3 Conclusion The objective for these fire areas is to confine a fire within one of I the rooms to only that room and prevent damage to redundant trains of equipment. This objective is satisfied by the current design since I the minimum fire resistance rating of the room walls is two hours and l the fire loading requires only one-half hour rated fire barriers. Gdbert/t m 4.4-55 Revision 8 2/23/82 L

() design which provides fire barriers having at least a two hour fire resistancerating,andanautomaticsprinklersystemtoextinguishanyl fire which -ight occur in this fire area. 4.5.10 Technical Support Center Computer Room, Fire Area CB-9, Elevation 436'-O 4.5.10.1 Description The technical support center computer room (room 36-09), shown by Drawing E-023-018, is located in the north central portion of the control building at elevation 436'-0". It is bounded on the north by the intermediate chase, northwest; on the east by the computer room; on the south by the relay room; and on the west by the relay room, future. This room provides space to house the technical support center () computer, and reactor vessel level instrument panels. Walls enclosing this room are of steel framing and drywall which provides a three hour rated fire barrier. The floor and ceiling are constructed of reinforced concrete over three hour fireproofed steel form deck and framing. Both floor and ceiling provide three hour fire rated barriers. Doorways between this room and adjacent fire areas / zones are protected by Class A fire doors. No safe shutdown equipment is located in this room. i Fire detection equipment consists of ionization detectors which actuate control room alarms. Fire suppression equipment consists of an automatic, low pressure CO system actuated by heat 2 detectors, and fire extinguishers and interior manual hose as I / l shown by Drawing E-023-018. I Geert /commonweerth 4.5-22 Revision 8 2/23/82

) Position for Plants Under South Carolina Electric Construction and Operating Plants and Gas Company Response 3. All automatic start signals will start the pumps at the proper setpoints (95 psig for electric driven pump and 85 psig for diesel driven pump). 4. Each pump capacity exceeds design requirements during flow test (greater than 2500 gpm at 135 psig discharge pressure; greater than 3760 gpm at 90 psig discharge pressure). (d) Two separate reliable water Water supply is from Monticello supplies should be provided. If Reservoir. tanks are used, two 100% (minimum of 300,000 gallons each) system capacity tanks should be installed. They should be so interconnected that pumps can take suction from either or both. However, a leak in one tank or k'_') N its piping should nut cause both tanks to drain. The main plant fire water supply capacity should be capable of refilling either tank in a minimum of eight hours. Common tanks are permitted for Not applicable. fire and sanitary or service water storage. When this is done, however, minimum fire water storage requirements should be dedicated by means of a vertical standpipe for other water services. (e) The fire water supply (total The maximum flow demand for capacity and flow rate) should areas containing safety related be calculated on the basis of equipment is for the cable the largest expected flow rate spreading area elevation 448'-U' for a period of two hours, but which is 2752.0 gpm at 74.1 not less than 300,000 gallons. psig which includes 500 gpm for This flow rate should be based manual hose streams and 1000 gpm for the diesel generator cooling system. ('_/') i s 5.0-29b Revision 8 2/23/32 l

,-.'x j Position For Plants Under South Carolina Electric Construction and operating Planta and Gas Company Response locations in the plant (See A program is established to NFPA 26, " Supervision of Valves.") provide management supervision When electrical supervision of for post indicator valves and the fire protection valves is not following gate valves: practicable, an adequate management supervisi '.a program 4039-FS 4136A-FS should be provided. Such a 4041-FS 4136C-FS program should include locking 4042-FS 4137-FS valves open with strier key 4043-FS 6762-FS control; tamper proof seals; 4044-FS 6803-FS and periodic, visual check of 4045-FS 6819-FS all valves. 4046-FS 6821-FS 4047-FS 6822-FS 4048-FS 6823-FS 4118-FS 6824A-FS 4119-FS 6824B-FS 4126-FS 6820-FS 4131-FS This program includes locking valves open with strict key control; tamper proof seals; and -) periodic visual check of valves. M.) (ml / (_/ 5.0-31a Revision 8 2/23/82

() Position For Plants Under South Carolina Electric Construction and Operating Plants and Gas Company Response (c) Automatic sprinkler systems Sprinkler systems throughout should as a minimum conform to Virgil C. Summer Nuclear Station requirements of appropriate satisfy the design and standards such as NFPA 13, installation requirements of " Standard for the Installation NFPA 13 and/or NFPA 15. of Sprinkler Systems", and Automatic sprinkler or other water NFPA 15, " Standard for Water spray systems were specified to Spray Fixed Systems." protect oil hazards or charcoal filters. The basis for using such systems was the fire protection engineer's experience and the American Nuclear Insurers require-ments. The preaction sprinkler system for the cable spreading areas was specified in accordance with NRC requirements. The density and spacing used meet or exceed that required by NFPA 13 and 15. A sample hydraulic calculation is attached to this report for the largest system flow and pressure. fs (d) Interior manual hose installation Hose reels equipped with 75 feet (,,) should be able to reach any of hose are provided throughout location with at least one Virgil C. Summer Nuclear Station effective hose steam. To as indicated on the fire protection. accomplish this, standpipes with layout drawings. One hose reel hose connections equipped with located adjacent to stair tower a maximum of 75 feet of 1-1/2 inch 12-19 at the 463'-0" elevation of woven jacket lined fire hose and the auxiliary building is equipped suitable nozzles should be with 100 feet of hose. Fire hose provided in all buildings, is 1-1/2 inch synthetic braided including containment, on all rayon cord pile hose which does floors and should be spaced at not require drying after use and not more than 100-foot intervals. testing. (Single jacket rubber Individual standpipes should be lined approved hose is provided at least 4-inch diameter for throughout the control building. multiple hose connections and Each hose cabinet is equipped 2-1/2-inch diameter for single with 75 feet of hose with the exception of the hose cabinet located in the Technical Support, Center elevation 463'-0" which has 100 feet of hose.) Individual standpipes are 4-inch diameter for multiple hose connections and 2-1/2-inch diameter icr single hose connections. OO 5.0-32 Revision 8 2/23/82

Ii Position For Plants Under South Carolina Electric ~# Construction and Operating Plants and Gas Company Response hose connections. These systems The systems satisfy the should follow the requirements of requirements of NFPA 14. NFPA No. 14 for sizing, spacing and pipe support requirements ~ (NELPIA). i Hose stations should be located Hose stations are mainly located I outside entrances to normally outside entrances to normally unoccupied areas and inside unoccupied areas. Shutoff valvesg normally occupied areas. Stand-are provided at each hose stationi pipes serving hose stations in and in the main feed to the areas housing safety related standpipe. equipment should have shut off valves and pressure reducing devices (if applicable) outside the area. (e) The proper type of hose nozzles All areas are provided with to be supplied to each area adjustable pattern, fog only, should be based on the fire r.ozzles. Personnel are adequately hazard analysis. The usual trained to make proper use of combination spray / straight-hose stations. O ( O) (_ 5.0-32a Revision 8 2/23/82

Position 7or Plants Under South Carolina Electric (s) Construction and Operating Plants and Gas Company Response (b) Refueling and Maintenance Refueling and maintenance Manual fire fighting capability operations in containment may is permanently installed in introduce additional hazards the reactor building. Standpipes such as contamination control with hose stations are installed I materials, decontamination at strategic locations throughout supplies, wood planking, temporary the reactor building and portable, wiring, welding and flame cutting extinguishers are located (with portable compressed fuel immediately outside personnel gas supply). Possible fires access hatches to the reactor would not necessarily be in the building for required manual fire vicinity of fixed detection and fighting operations. Adequate suppression systems. self-contained breathing apparatus is provided near the Management procedures and controls reactor building personnel necessary to assure adequate fire airlock for use by fire fighting protection are discussed in and damage control personnel Section 3a. during refueling and maintenance operations. In addition, manual fire fighting capability should be permanently installed in containment. Standpipes with hose stations, ~s s,) and portable fire extinguishers, should be installed at strategic locations throughout containment for any required manual fire fighting operations. Equivalent protection from portable systems should be provided if it is impractical to install standpipes with hose stations. Adequate self-contained breathing apparatus should be provided near the containment entrances for fire fighting and damage control personnel. These units should be independent of any breathing apparatus or air supply systems provided for general plant activities. 2. Control Room The control room is essential to safe The control room is separated g reactor operation. It must be from other areas of the plant s,,/ protected against disabling fire by fire rated floor, walls and damage and should be separated from ceiling. Section 4.5.19 other areas of the plant by floors, discusses fire resistance walls and roofs having minimum fire ratings of these barriers and resistance ratings of three hours. outlines the protection for the control room. 5.0-36 Revision 8 2/23/82

() Position For Plants Under Soutu Carolina Electric Construction and Opeiating Plants and Gas Company Response 6. Remote Safety Related Panels The general area housing remote Combustible materials are safety related panels should be controlled in these areas. provided with automatic fire Manual fire suppression equipment detectors that alarm locally and is provided for these areas. The alarm and annunciate in the fire hazard analysis details control room. Combustible materials these areas. should be controlled and limited to those required for operation. Portable extinguishers and manual hose stations should be provided. 7. Station Battery Rooms Battery rooms should be protected The battery rooms are separated against fire explosions. Battery from other areas by three hour rooms should be separated from fire resistance rated walls, each other and other areas of the floors and ceiling. The fire plant by barriers having a minimum hazards analysis outlines the fire rating of three-hours protection provided for these d inclusive of all penetrations and areas. openings. (See NFPA 69, " Standard - O on Explosion Prevention Systems.") The ventilation system maintains Ventilation systems in the battery the hydrogen concentration rooms should be capable of maintaining well below two percent by volume. the hydrogen concentration well below Loss of Sir flow in the battery 2 vol. % hydrogen concentration. rooms is indicated as follows: Standpipe and hose and portable extinguishers should be provided. 1. Motor trip alarms. Each of two redundant safety related battery room exhaust fans alarms in the control room when its motor trips. These fans are an axial flow type in which the motor is directly connected to the fan. If the motor stops, the fan and air flow stop. 2. Fan status lights. Lights in the control room indicate which fan is operating and 4 thereby establishing air flow. i 3. Vibration detector. Abnormal fan operation (brcken fan blade, etc.) would cause an alarm in the control room. O Starting the redundant fan would reestablish air flow af ter securing the malfunctioning fan. 5.0-41 Revision 8 2/23/82

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i i l 11 l 15 l 14 l 13 l 12 l l 10 17 16 i d A SERVICE WATER PUMP A-E L 4 59'- O" 7200 VOLT SWITCHGE AR B c -- --- yZYXFYMXXX>W^N NZ LZ-SERVICE WATER N I O I l I. i ] g XMC-tEBn 1 x PUMP HOUSE f SUPPLY FANS p I F l Na v f:m O M T EZ~q r % 4, e i e-D e-_g, ___. _._, j= xe,.,g.g,g,,, s,g,35.,LE4 3g.o-f 1 ( DUCT ENCLOSUAE (1 i l EL 425'-0 J 4 .-? --i g i, p- _..g c ._ 4 y - h 1 -FIRE CWFER IN TRE' i.f l BET 4ELN ROCUS i,r ,j = E $ i~ N I j l El. 390-0.. l l '~l~$ :~ SECTION A-A 17 i c-a SWPHx!13 - = ( &NRZ [& f W Wi t$ / h l Mll U Ub Nq,d R sc s auW e l Lk( g ,s \\ ' 'Qi % y sy n = ? ,i A 1 'r <n a p a -{/' T- / EL 425 G. h ik h PUMPS FLCOR v 480 VOLI l B) ' 7% a 6M

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~~ . ~. b t v ( ATTACIPtENT I 6 of B / VIRGIL C. SUNttER COLD SHUT 1XMi l SUPPORT SYSTEMS LOCATION FUNCTION EQUIPMENT # SEP. OF CONTROL RENARKS 1. Service Water System a. Start /Stop Service Water Pumps XPP-39A-SW A CREP & HCB XPP-398-SW B CREP & HCR XPP-39C-SW A/B CREP & HCR b. Start /Stop Service Water Booster XPP-45A-SW. A Switchgear (XSWIDAI) & HCB Pumps XPP-45B-SW B Switc-hgear (XSWIDBI) & HCB Open/Close Industrial' XVB-3tl0A-SW A NCC (XHCIDA2X) & HCB Handwheet for local, manual control. c. Cooling Water Valves XVB-31108-SW B NCC (XHCIDB2Y) & NCR Handwheel for local, manual control. to Reactor Building Cooling Units XVG-3111A-SW A NCC (XHCIDA2X) & NCB Handwheel for local, manual control. i XVG-38tlB-SW B NCC (XNCIDB2Y) & NCB Ilandwheel for loc-1, manual cont rol. XVG-3112A-SW B HCC (XMCIDB2Y) & HCB Handwheel for loc.i, manual control, XVG-3tl28-SW A NCC (XHCIDA2Y) & NCB Handwheel for local, manual control. p d. Open/Close Service Water Valves XVB-3106A-SV A HCC (XHCIDA2X) & HCB Handwheel for local, manual control. h~ { h to Reactor Building Cooling Units XVB-3106B-SW B NCC (XNCIDB2Y) & HCB Handwheel for local, manual control. o j XVG-3IO7A-SW A MCC (XNCIDA2X) & HCB Handwheet for local, manual control. XVG-3IO7B-SW B HCC (XMCIDH2Y) & NCB Handhweet for local, manual control. U 2. Component Cooling Water System a. Start /Stop Component Cooling XPP-1A-CC A Switthgear & MCB (XSWIDA) Water Pump XPP-1B-CC B Switchgear & NCB (XSWIDB) XPP-lC-CC .A/B Switchgear & HCR (KSWIDA/XSWIDB)

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3. Chilled Water System 4 a. Start /Stop Chillers XHX-IA-VU - A Switchgear (XSWIDAl) & NCB D XHX-1B-VU B Switchgear (XSWIDBI) & HCB ,XI(X-lC-VU A/B Switchgear (XSWIDAl/XSWIDBI) oo b. Start /Stop Chilled Water Pumps XPP-48A-VU A Switthgear (XSWIDA2) & MCB XPP-48B-VU B Switthgear (XSWIDB2) & NCB XPP-48C-VU A/B Switchgear (XSWIDA2/XSWIDB2) & HCB N c. Open/Close Chilled Water Valves XVG-6516 A NCC (XHCIDA2Y) When operating from the Control Room, D for Component Cooling Pump Notors XVG-6517 A NCC (XHCIDA2Y) these valves automatically open/close La XVG-6518 B NCC (XIICIDB2Y) when their associated component cooling ) XVG-6519 8 NCC (XHCIDB2Y) pump starts / stops. p

O O O 7 of 8 ATTACl! MENT I VIRGIL C. SUMMER COLD Sif0TDOWN SUPP0HT SYSTEMS LOCATION FUNCTION EQUIPMEN( f SEP. OF CONTROL REMARKS 4. HVAC Systems Start /Stop Reactor Building XAA-IA-AH A SwitcLgear (XSWIDAI) & MCB Fan is XFN-64A-AH. a. Cooling Units XAA-lB-AH B Switchgear (XSWIDA2) & MCB Fan is XFN-64B-AH. XAA-2A-All A Switchgear (XSWIDAI) & MCB Fan is XFN-65A-AX. XAA-2B-AH B Switchgear (XSWIDBI) & NCB Fan is XFN-65B-AH. b. Start /Stop St Pump Rooli XAll-I A-VL A HCC (XHCIDA2Y) & HVAC Fan is XFN-46A-VL. Cooling Units XAll-1 B-VI. B HCC (XMCIDB2Y) & HVAC Fan is XFN-468-VL. XAll-2-VL C NCP (XPN0040) & HVAC Fan is XfN-47-VL. XPN0040 is local panel for C SI/ charging pump auxiliaries. c l c. Start /Stop RHR Pump Room XAH-4A-VL A HCC (XMCIDA2Y) & HVAC Fan is XFN-49A-VL. l p Cooling Units XAH-4B-VL B MCC (XMCIDB2Y) & HVAC Fan is XFN-498-VL. h d. Start /Stop Auxiliary Building XAH-32-VL A HCC (XMCIDA2Y) & HVAC Fan is XFN-132-VL. NCC Switchgear Cooling Units XAH-33-VL B HCC (XMCIDR2Y) & HVAC Fan is XFN-133-VL. Battery Room Cooling Units XAll-24A-AH A NCC (XHCIDA2X) & HVAC Fan is XFN-38A-All. E XAH-248-AH B HCC (XNCIDB2X) & HVAC Fan is XfN-38B-#J. e e. f. Service Water Pimp ilouse XfN-80A-AM A NCC (XMCIEAIX) & HVAC Cooling Units XFN-BOR-AH B MCC (XMCIEBlX) & HVAC l g. ESF Switchgear Room Cooling XAH-6-VL A MCC (XMCIDA2X) & ffVAC Fan is XFN-50-VL. I y Units XAH-8-VL B HCC (XMCIDB2Y) & HVAC Fan is XFN-76-VL. 7 h. Speed Switch Room Cooling Units XAH-19A-VL A HCC (XMCIDA2X) & HVAC Fan is XEN-106A-VL. 4 XAH-19B-VL B NCC (XMCIDB2Y) & HVAC Fan in XFN-106B-VL. s O

i. Emergency Feedwater Pump XAH-ilA-VL A

NCC (XMCIDA2X) & HVAC Fan is XFN-83A-VL. Fan is XFN-838-VL. CD Cooling Units XAH-IIB-VL B HCC (XMCIDB2X) & HVAC J. Battery Room Exhaust Fans XFN-39A-AH .A MCC (XMCIDA2X) & HVAC XFN-39B-AH B HCC (XMCIDB2X) & HVAC k. Relay Ro<a Cooling Units XAH-13A-AH A NCC (XMCIDA2X) & HVAC Fan is Xf N-36A-All. XAH-13B-AH B MCC (XMCIDB2Y) & HVAC Fan is XFN-368-AH. y N l. Control Room Cooling Units XAH-12A-AH A NCC (XMCIDA2X) & HVAC Fan is XFN-32A-AH. XAH-12 B-All B MCC (XMClllH2Y) & HVAC Fan is XFN-328-AH.

.. -. _ ~ . -.. _ _. -. ~ _. ( w i 1 i ATTACHMENT I 8 of 8 VIRGIL C. SUMMER j COI.D SHUTIMWN 4 SUPPORT SYSTEMS J' LOCAT!oN FUNCTION EQUIPMENT f SEP. OF CONTROI. REMARKS m. Diesel Generator Room Fans XFN-45 A-AH B MCC (XMCIDB2Z) & HVAC XEN-458-AM B MCC (XMCIDB22) & HVAC 4 XfM-75A-AH A MCC (XMCIDA2Z) & HVAC XFN-75B-AH A MCC (XMCIDA2Z) & HVAC 5. Indication 4 a. Reactor Building Temperature TI-9203B B CREP See Note I t TI-9203A B MCB TI-920lA A MCB 6. Diesel Generator p a. Start /Stop Diesel Generator XEG-1A-DG A D.G. Control Papel (XCX5201) & MCB { h3 XEG-1B-DG B D.G. Control Panel -(XCX5202) & MCB I N N h. Start /Stop Fuel Oil XPP-4A-DG A D.C. Control Panel (XMCIDA22) & MCC Transter Pumps .XPP-4B-DG B D.G. Control Panel I (XMCIDB2Z) & MCC i See FSAR Section 8.3 7. D-C Power Systems I 8. Portable Comununications Systems p to4W i in 7 Notes: D I. New instrument loop added to provide indepes.dence f rom Cont rol Building and, theref ore, is not subject to loss from a Control Building fire, m i 2. Indicator not required to achieve cold shutdown but is included as a'possible aid to operations and could be subject to. loss irms a postulated j'

fire, i

i N / N N LJ N N 4 <}}