Text

Forwards marked-up Pages of FSAR Section 9.4 to Reflect as-built Configuration of HVAC Sys
	ML20054B992
Person / Time
Site:	Summer
Issue date:	04/12/1982
From:	Nichols T; SOUTH CAROLINA ELECTRIC & GAS CO.
To:	Harold Denton; Office of Nuclear Reactor Regulation
References
	NUDOCS 8204190355
	Download: ML20054B992 (65)
	v • d • e

,

SOUTH CAROLINA ELECTRIC a GAS COMPANY post op rice nox re4 COLUMBIA, south CAROLINA 29218 T. C. NicHoLs, J n.

April 12, 1982 w ie...

... c. c. co ~.

NUCatan Openatsoess Mr. Harold R. Denton, Director Office of Nuclear Reactor Regulation U. S. Nuclear Regulatory Comnission Washington, D.C.

20555

Subject:

Virgil C. Sumer Nuclear Station i

Docket No. 50/395 Update of FSAR Section 9.4

Dear Mr. Denton:

In conpleting the construction and startup program for the Virgil C.

Suntner Nuclear Station, South Carolina Electric and Gas Conpany has made several minor changes to the Heating Ventilation and Air Conditioning System (INIC). Attached is a mark-up of FSAR pages in Section 9.4 to reflect the as-built configuration of INAC systens. These changes will be incorporated into Amendment 31 to the FSAR.

If you have any questions, please let us know.

Very truly yours,

/

<Jv[

T. C. Nichols, Jr.

AJ:'ICN:lkb Attachment cc:

V. C. Sunmer (w/o attach.)

G. H. Fischer (w/o attach.)

D H. N. Cyms gECEfVED 9

T. C. Nichols, Jr.

(w/o attach.)

y Apg y b IO8h g M. B. Whitaker, Jr.

'-~

J. P. O'Reilly fratt j

H. T. Babb 7,

p D. A. Nauman i

//

]

C. L. Ligon (NSRC) g W. A. Williams, Jr.

4 R. B. Clary O. S. Bradham A. R. Koon M. N. Browne G. J. Braddick J. C. Ruoff J. L. Skolds J. B. Knotts, Jr.

(

B. A. Bursey i

F 1

B204190355 l

DR ADOCK O 3h3 i

PDR

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9.4 AIR CONDITIONING, HEATING, COOLING, AND VENTILATION SYSTEMS 9.4.1 CONTROL Bl.*ILDING AREA VENTILATION SYSTEM Air conditioning, heating, cooling and ventilating systems are provided for the control roem and other contro1 building areas to satisfy the followine. general requirements:

~

1.

To maintain ambient air temperatures in all areas as required for the comfort and safety of personnel.

2.

To satisfy environmental requirements of equipment.

3.

To meet the radiation control requirements of 10 CFR 20.

4 To satisfy the design requirements of General Design Criterion 19, relative to the control room.

O 9.4.1.1 Design Bases The systems for the control building areas are designed in accordance with the following:

1.

The general requirements indicated in Section 9.4.1 are satisfied.

2.

Equipment, motors and controls in Safety Class 2b systems, excluding O

the instrument air system, are supplied from Class lE power sources and are separated and redundant to meet the single failure criteria.

3.

Instrumentation and control is provided to detect abnormal condi-tions, such as smoke, high temperature or high radiation levels which require operation in the m en l'5ir.. t emergency fil-3f tration mode or outside air purr,ing mode.

O pasJwr 31 9 "1 Ap:1 int

i f.

Provide means for cI:tomatically placing the system in the 2

Q energency mode and starting the emergency filter system upon receipt of safety injection or high radiation signal f rom the gaseous activity channel of RM-A1.

Provide means to automatically start the normal air handling units and emergency filter f ans following loss of offsite power.

g.

Provide means, in the control room, for manually initiating system damper positioning for the emergency modes of opera-7 tion and starting the emergency filter system.

h.

Provide means, in the control room, for manually overriding the emergency mode of system operation and to indicate, in g

the control room, that system override is in effect.

i. Maintain positive control room pressure by manually adjusting outside n'

' air dampers. Control 3l W

L room pressure in excess of system setpoints causes an alarm p

in the control room.

j.

Automatically maintain control room temperature by modu-lating face and bypass damper position and an electric reheat coil in the supply duct.

k.

Automatically maintain control room humidity by controlling a humidifier.

1.

Indicate, in the control room, air handling unit or emer-O gency filter fan operation.

O 31 9.4-4 A?ENI)?ENT =

NOVEMBER, 1980

y gp L SUV The system continuously supplies filtered, cooled or heated air to the A

control room,g and the cable spreading area under the control room, 3I during normal conditions.

Filtered and' cooled air is provided during post accident and loss of offsite power conditions.

By operation of either one of the two supply air trains, and control of the proper dam-make - u F I

A pers, the system admits small amounts of outside r :MI M r. air ~ to the y

22 control room to maintain positive pressure during normal and emergency operation, or admits 100 per<ent outside air during purge mode. The system maintains space temperature by automatically varying the volume of air passing through the cooling coil and by energizing circuits in the electric reheat coil. The cooling coil is supplied with chilled water from the chilled water system (see Section 9.4.7.2.4).

Upon receipt of a safety injection or high radiation signal from the gaseous activity channel of RM-A1, the system automatically places the dattpers in the emergency mode and starts the normal air handling unit and emergency filter fan.

A loss of offsite power causes the air hand-22 ling units and emergency filter fans to start automatically.

In the event rf Inas of offsite power, the system can be manually reset for normal operation. Operation of the emergency filter fans passes control room return air through the emergency filter system.

Normal operation of the system is accomplished using manual switches in the control room.

The mechanical components, control devices and supply and return duct-work are redundant and separated to ensure system availability. Each system component requiring electrical power is supplied from the Class 1E electrical system.

Both systems are supplied with required instru-S A

ment air from the non-nuclear safety class instrument air system.pince 1

deseyy ss instrument air is not

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9.4-5 AMENDMENT 32 6 :..-- H, ;r;sfr:I,ttst

O d. Provide means for automatically placing the system in the 2 emergency recirculation rode (close outside air and relief dampers and open return dampers) and starting the air handling units upon receipt of a safety injection signal or high ra-diation signal from the gaseous activity channel of RM-A1. Loss of of fsite power starts the air handling units but does not cause dampers to be positioned for operation in the re-circulation mode. Provide means for manually initiating system damper position-l2 e. ing for the emergency recirculation mode of operation. f. Provide means for manual control of outside, return and relief l.2 damper position. A 1 g. Automatically maintain relay room temperature by modulating

l. 2 f ace and bypass damper position and an electric reheat coil in the supply duct.

h. Indicate, in the control room, air handling unit operation. 2 gup itcw#nG So Pfah r ecure n. Eque Ptit ef:= R ee M The system continuously supplies filtered, cooled or heated air to the g relay room under normal conditions. Filtered and cooled air is pro- '31 ) vided under post accident and loss of offsite power conditions. By operation of either one of the two supply air trains and by automatic control of the proper dampers, the system admits fixed amounts of i outside ventilation air, no outside air (i.e., recirculation mode) ), or 100 percent outside air (i.e., purge mode). The system maintains space temperature by automatically varying the volume of air passing through the cooling coil and by energizing circuits in the electric O) 9.4-7 AMENDMENT T 3/ MM 28U Ap.'I, s t 12

reheat coil. The cooling coil is supplied by r.echanically chilled Upon receipt of a safety injection or high radiation signal h water. from the gaseous activity channel of Plf-Al, the system automatically positions the outside air dampers for the recirculation mode.h ll N E.SFL S _ : r - s _../ - y = 1._ : Recei t of -7__ -- signal 3/ ni serv AIA H !!o t-stv ir ahvo rs- ~ starts the fans " The units are h 9: n ex J, normally operated from the control room. Mechanical components, con-trols, duct system redundancy, separation, power supply and equipment location are the same as for the control room system, discussed in Section 9.4.1.2.1. V 9.4.1.2.3 Computer Room System The main components of this system include: 1. Two 100 percent capacity air handling units, each with roughing 2 filters (80 percent efficiency on NBS dust), face and bypass sec-tion, chilled water cooling coil and fan section. 2. Electric reheat coils in the supply duct. 3. Redundant supply, return, relief and outside air ducts. 4. Air operated, spring opposed da=pers in the face and bypass damper sections of the air handling units cad.in the outside, return and relief air ducts. 5. Instrumentation and control devices to perform the following func-tions: Measure the pressure drop across the air handling unit filter a. bank (local indication only). V 2 3I 9.4-8 AMENDMENT F MN Api,I, t 4 $1

is available. By operation of either one of the two supply air trains and by automatic control of the proper dampers, the system admits fixed Q amounts of outside ventilation air, no ou~tside air (i.e., recirculation mode) or admits 100 percent' outside air (i.e., purge mode). The system maintains space temperature by automatically varying the volume of air passing through the cooling coils and by energizing circuits in the. h electric reheat coil. Th,e cooling coil is supplied by mechanically s ssk tY o@s r * * *r-2 chilled water. Upon receipt ofta Han neo,nresov '1 N ___-- signal, the system pempre automatically placeh " r'ran: tee in the recirculation mode position and ner e tv o /W,e 6 the system. continues to est if edisemee power is available. The units g g are connected to Class IE power buses. The units are no ally operated from the control room. ~

9. 4.1. 2. 4 Controlled Access Area Supply System The main components of this syst;m include:

1. A 100 percent capacity air handling unit including roughing filters (80 percent efficiency on NES dust), electric preheating coil, fan h 2 section, coil section with chilled water coil and electric heating coil and a hot and cold deck zoning damper section. 2. A 100 percent capacity sample room and radiochemical laboratory l 1 hood supply fan. 3. Outside air, zone supply and hood supply ducts. 4. Air operated, spring opposed dampers to isolate the controlled access air handling unit and laboratory hood supply fan when not in use; in the air handling unit zoning damper section; and in the outside air intake duct. j (u m aeee er., a ese sm , na. nsran ponaces p aa puronnrue.nLLy 9ta ceo su rit t Recon.ev u m en Meos Pcc in*N 31 Lu tTH 'rrt z. rk M e rc a.s 1}Lecre o i= Ae m e P E A n i te rV U N Yt L. ( 9.4-10 AMFRDME?TT h 31 Ap;l, a 412-

e The gaseo,us activity channel of RM-Al automatically closes the outside o n.,.a,... - air dampersAand places both systems in the recirculation 4 mode,upon v detection of high activity in the air supplied to the control room. Smoke or high temperature in the supply ducts to the control room and to the relay room or in the discharge duct from the emergency filter system cause alarms to be actuated in the control room. Air flow rates in the outside air ducts to the control room and to the relay room are indicated in the control room. During normalioperation, the control room is n -_i_11, pressurized a focal an.unst of through the :;nt :lled introduction ofAoutside air. The flow of outside air to the relay room is fixed but is manually adjustable. In the recircu-laluu medc,. curridt air in inn vauucJ fe. control :::r preocuri :ti: n .Il "c .c-, control room air is filtered through roughing, HEPA and charcoal for smone e.movst, filters. Recirculated relay room air is not filtered. fystem dampers for both control and relay room systems can be positioned manually Jones nf e-m :1 ::: to purge with outside air at rates Esom=0 to 100 percent. [ Degradation of equipment performance as a result of excess temperature and humidity is not anticipated since the control and relay room systems are designed in accordance with the criteria specified above. l l l 9.4.1.4 Inspection and Testing Requirements l l l The control building area systems are subjected to preoperational testing in accordance with written procedures to verify proper wiring l and control hookup, filter and duct system inplace integrity and leak tightness, proper function of system components and control devices and to establish system design water and air flow rates. To ensure a continued state of readiness of the control building area ( s systems af ter completion of the preoperational tests, the following l \\ inspection, maintenance and test procedures are performed. .. ~...,.. u. -. i.. ~ -i \\ n -. ..,....., :-.,. -.. s \\ e be r.fo siri.es) a saal th perrys Jent.* r sola r os e gla r< r e u o u s.9 f!*

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] and have suf ficient separation and redundancy to satisfy the single failure criteria. 3. Provision is made for monitoring and actuating alarms in the con-O trol room upon detection of: high temperature in ducts, HEPA/ char-coal plenums, or pump cubicles; high smoke concentration in ducts; high vibration at f an motors; and motor trip. Provisions are also made for monitoring the following in the control room: damper positions, main plant vent flow rate, and radiation levels in the main plant vent (PJi-A3), waste gas decay tank vent (RM-A10); and HEPA/ charcoal plenum (RM-A5a, RM-A5b). g anonentrP N 4. Manual control of these systams is provided in the control room. L Pump room units operate automatically when the respective pump operates. 5. Continuous, controlled air flow is maintained from areas of low to O progressively higher radiation levels. Maintenance of a negative auxiliary building pressure ensures that exfiltration from the auxiliary building does not occur. 6. Exhaust air flows through roughing and HEPA filters or through roughing, IIEPA, charcoal and FEPA filters, depending upon the potential radioactivity of the areas exhausted. 7. System functions, ambient conditions, safety class and seismic O category are listed in Table 9.4-2. 9.4.2.2

System Description

O The system diagrams for the various auxiliary building and radwaste area systems are as follows: A wlm*T 3I A/'#I 'iT ' 9.4-20 j

O 1. Figure 9.4-6, Auxiliary Building Main Supply System. 2. Figure 9.4-7, Auxiliary Building HEPA Exhaust System. 3. Figure 9.4-8, Auxiliary Building Charcoal Exhaust System. Fi ure 9.4-9, Auxiliary Building Main Exhaust System. E O 5. Figure 9.4-10, Auxiliary Building Pump Room and Motor Control Center Cooling Systems. 2 6. Figure 9.4-10a, Hot Machine Shop Ventilation System. Z fiqu re 4.4 -lo b, Misce.itome e*5 A um h a rq But IJing HvAt. 5 ysk m5, y,

9..'. 2. 2.1 Auxiliary Building Itain Supply System The main components of this system include:

1. A 100 percent capacity supply fan directing ventilation air to 1 31 various areas of the auxiliary building andaies radwaste areas 4 a## To tu t j c / Ortl #Mo unt, g u iu o s,49 2. Two 50 percent capacity supply air filter plenums, each consisting of roughing filters (80 percent ef ficiency on NBS dust) and elec- '2 trir preheat coils. 3. Electric reheat coils in the zone supply ducts. 4 Air operated, spring opposed dampers to isolate the supply fan when not in use and to close or control the outside air supply. 5. Ductuork from the outside air connection to the filtering and pre-heating plenues, to the supply fan and to the various auxiliary O 3/ building ^dsd aJ areas. ,..a stR y 6. Instrumentation and control devices to perform the following functions: a. Measure the pressure drop across the roughing filter banks (local indication only). O b. Cause an alarm in the cent rol room upon detection of high con-l centration of smoke in the supply main to the various auxil-l l inry building areas. 3I AMENDMENT 5 9.4-21 A/ 'I MN 'M I l

Cause an alarm in the control room upon detection of high tem-c. perature in the supply main to the varicus auxiliary building f. areas. ,y. d. Indicate, in the control room, supply fan. isolation damper and outside air dacper position. Cause an alarm in the control room upon detection of excessive e. vibration of the supply fan.

.i.

f. Cause an alarm in the control room upon detection of'high or low auxiliary building ambient air pressure, Provide means for manual operation, from the control room, of g. the supply fan interlocked with its isolation dampers and with the main exhaust fans. h. Automatically maintain minimum supply air temperature by con-trolling the supply system preheat coils and provide inter-locks to prevent preheat coil operation unless supply fans are operating. I Af *

gt Maintain negative ambient static pressure within the auxil-d.

iary building by the setting of manual balancing dampers. N , -j An* tic -117 7 71nt;[, 27b i;_3,;_; _,,,, ;; n; e,,u e, ; w ;,, i th: 2 "w i i n " k "4 '_ din;; t y -- hl rin;;_.t b_eyn a l y -*-d 2-e r a i k. Indicate, in the control room, supply air fan operation. 1. Cause an alarm in the control room upon detection of supply air fan motor trip. I 1 pyqg gr sc A L Ly (18 tNrn sW Fs xz 0 Z or/ C S v P P i '( P IR TEMPc A A TU A E By C o NTfloLL iuq Tff E. Z o/vi REHEAT ~ Col'S. 3r 9.4-22 I AMENDMENT Ok WFPMeR, PMt /)prel 8991 j i

l O h. Indicate, in the control room, exhaust fan operation. 'i. Cause an alarm in the control room upon detection of exhaust fan' mo tor trip. O j. Cause an alarm in the control room upon detection of a high radiation level in the main plant vent (RM-A3). The auxiliary building main exhaust system operates continuoSI ly tq f ( andling building system, the HEPA ex uYGI># en handt' oude AN D direct all air from the fu i d>or# ham A / 3f haust system and the charEoal e st system to the main plant vent. 1 Interlocking of the va~rious systems prevents operation of the auxil-iary or fuel building supply fans unless the exhaust system is era-Clunlu. btMds ting. Similar interlocking prevents operation of the 3j A exha t 4 fans unless the auxiliary building charcoal exhaust fans are opera-ting. Thus, the auxiliary building and fuel handling building ambient pressure does not become positive and the exhaust flow paths toward O increasing potential radioactivity are not violated. The main exhaust fans are manually controlled from the control room and use non-Class 1E power.

9. 4. 2. 2'. 5 Auxiliary Building Pump Room Cooling Systems The main components of these systems include:

1. For each charging pump room and each residual heat removal / reactor O building spray pump room, a 100 percent capacity air handling unit consisting of f an section, chilled water coil and roughing filter. 2. Ductwork supply and return from each air handling unit to its O respective room. 3. Instrumentation and control devices for each system to perform the following functions: O 9.4-29 %.,la.4 II Ape:1,1982

9'4117 Not helu.e 5 L+ Decmb.m dion/buta_Ved f alw L% (Sn. M e) 3l 9.4.2.2.\\ Auxiliary Building Motor Control Center and Switchgear 8 Areas Cooling Systems The main components of these systems include: 1. Three 100 percent capacity air handling units. Each of these air handling units serves one of. the three motor control center and switchgear areas. The air handling units serving motor control center and switchgear areas at elevations 412' and 463' each include a fan section, chilled water coil and roughing filter. l The air handling unit serving the motor control center and switchgear area at elevation 436' includes a fan section, direct expansion type cooling coil and roughing filter. Also a part of the system for elevation 436' is a remotely counted condens-ing unit, including refrigerant compressor, condensing section, piping and controls. 2 2. Ductwork frem the various air handling units to the areas requiring cooling. 3. Instrumentation and control devices for each system to perform the following functions: a. Measure the pressure drop across the roughing filter (local N or Tff e 'f 3 4'- o u nig N indication only)j i j l b. Cause an alarm in the control room upon detection of high con-l centration of smoke in the electrical equipment room. c. Cause an alarm in the control room upon detection of high tem-perature in the discharge of the air handling unit or in the electrical equipment room. 3I S.4-30b APl2iDMENT T UI W M7 Ar;I,I?8L

INSERT - SEE Pg. 9.4-30b G 9.4.2.2.7 Hot Machine Shop Decontamination Area Ventilation System The main components of this system include: O 1. An air handling unit comprised of a roughing filter section, an electric heating coil sec, tion and a fan section. The unit is rated at 100% of the required supply air flow. m'N 2. An exhaust fan rated at 100% of the required exhaust air flow. 3. A filter plenum containing a roughinF and a HEPA filter bank. The filter is rated at 100% of the exhaust air flow. 4. Ductvork between the air handling unit and the points of distribution, between the wall hoods and the filter, between the filter and the /"\\ exhaus t f an, and between the exhaust fan and the plant vent. The ductwork contains an automatic isolation damper for each fan which closes when the respective fan is off and vice versa. 5. Instrumentation and control devices to perform the following functions: a. To sense and correct the air handling unit supply air temperature by energizing the electric heating coil. O b. To sense'and alarm locally in the event of high temperature air in both the supply and exhaust ducts. N A v5 Y j fag 6]C To indicate locally the pressure differential air on each filter bank. l c. A-All components of this system are non-nuclear safety. Both fans operate O l l

INSERT - SEE Pg. 9.4-30b A continuously, when normal power is available, to supply air to and exhaust air from the wall hoods. The fans are controlled from local stations and are supplied from non-class 1E power sources. n D l O ~

d. Indicate, in the control room, fan operation (safety related fans only). Cause an alarm in the control room upon detection of fan motor e. trip. f. Automatically cycle the selected air handling unit in response to a room thermostat (safety related fans only). 3 The air handling units in each of the two safety related areas recir-culate and cool while cycling on/off in response to a room thermostat. Under emergency conditions, the thermostat control of air handling units at elevations 412' and 463' is bypassed and the units start and operate continuously following receipt of a safety inj ection or loss of offsite power signal. Power is supplied to the units at 2 elevations 412' and 463' from separated, independent Class 1E power sources. Power is supplied to the system at elevation 436' from a A non-Class lE source. The air handling unit at elevation 436' operates continuously when started at the local control station. A room thermo-stat controls the refrigerant solenoid valves. The air handling units can be manually started or stopped from the control room. 9,q.Lt g Hot h % 5h. Vrarsacem Ift e )( Q 4.w.t,s.io A.ls w Bui ldia d"hM ~ ibem Exha

N 4.g. or n acaM,rs Hen l4.tW R4 m ShepeLu %,1, % m f.ryppm, f rt 5M 3 I 9.

.2.3 1 Safety Evaluation f v i HP The auxiliary and radwaste area systems, excluding the pump room units, l and motor control center and switchgear cooling units at elevations 412' O and 463', are not safety class systems. However, redundant fans are provided for the nain exhaust, the charcoal exhaust and the HEPA exhaust systems. Charcoal exhaust fans and plenums are physically separated, housed in shielded concrete enclosures and the fans receive power from O i the Class lE electric system. All charcoal and HEPA filter plenums are constructed in accordance with Seismic Category I requirements. Addi= ticnally, provision is made for suitable maintenance and change-out 1 space and adequate instrumentation and lighting, all of which reduce O personnel exposure. 9.4-30c AMENDMENT G 3l 3 Mth @$25 Ap:1,119L

INSERT - SEE Pg. 9.4-30c O h er u ri m 9.4.2.2.9 Hot Instrument Repair Shop "... ^ ' ; System The main' components of this system are contained in a single, factory-assembled, O through the wall, air conditioner with built-in electric heating coil. All controls are self-contained. No ductwork'is employed with this system which is classed as non-nuclear safety. M This system operates continuously. The unit compressor and electric heating coil cycle as required to maintain the room temperature controlled by the self-contained thermostat. 9.4.2.2.10 Auxiliary Building Elevator Machine Room Exhaust System The main components of this system are an exhaust fan with back-draf t damper, O a gravity-operated air louver and an electric unit heater. A room thermostat cycles the fan. A self-contained thermostat cycles the unit heater. No ductwork is employed. The system is non-nuclear safety class. HVAC 9.4.2.2.11 fif Calibration 1.ab and Repair Shep M. L..--mg System The main components of this system include: 1. A self-contained, air-cooled heat pump containing a compressor motor, an indoor fan motor, an outdoor fan motor and an electric heating coil. l l 2. Ductwork to and f rom the lab and shop including manual balancing dampers O in the return and outside air ducts, a splitter damper in the supply duct, supply air dif fusers, return registers and a roughing filter. 3. g Controls include a compressor crankcase heater, automatic def rost package, room thermos tat and switchbase, emergency heat relay and outdoor

INSERT - SEE Pg. 9.4-30c O thermostat package. All motors have thermal-and-current-sensitive overload devices. g=g This system is classed as non-nuclear safety. The heat pump is started by a remote manual switch which causes its indoor fan to operate continuously to provide air circulation and ventilation. The h compressor and electric heating coil cycle automatically under thermostatic control to maintain the space temperature.' A i l /~h

7%

s-

/"'N The pump room systems and the motor control center and switchgear cooling units are not redundant but are arranged as single units for 2 each pump room. Loss of a pump room, motor control center or switch-gear cooling unit recuires use of redundant equipment and its cooling /"'N unit. The cooling units are separated, located in an accessible, shielded location and are not subje,et to floods, weather, external missiles, jet impingement or pipe whip. The pump room units are powered from separated Class lE power supplies. 1 WWWA 3l s4fEFunits are administratively controlled from the control room during normal operating or refueling periods. This control is subject to pro-tective electric interlocking so that negative auxiliary building pres-sure and design air flow paths are maintained. Operation of the pump room units is automatic. These units operate when the associated pump operates. htAt 3) Munits are monitored from and alarms are provided in the control / 'N The charcoal plenu=s.have manually actuated water deluge systems room. for fire protection. Radiation levels in the charcoal filters, the exhaust from the gas decay vent and the main plant vent exhaust are monitored from, and alarms are provided in, the control rcom. Exhaust filter plenums provide a minimum of 95 percent removal efficiency for both organic and elemental forms of iodine. /*"N 9.4.2.4. Inspection and Testing Requirements l The auxiliary and radraste area ventilation systems are subjected to preoperational test procedures to verify proper wiring and control O 31 O 9.4-31 AMENDMLNT ~3 .um 2ew A AI, stat t o

E R22I ?Y 's 9 Auxiliary !!uilding Main Exhaust System O 1! ' k I Auxiliary building main exhaust system inspection, maintenance and testing requirements are the sanc as auxiliary building %j v' g charcoal exhaust system requirements b through d. 't k s Ri Auxiliary Building Main Supply System g .: Id f M s g ( 1 ye $ Auxiliary building main supply system inspection, maintenance and U Q jg$$ gq testing requirements are the same as auxiliary building charcoal d ' ~ dak exhaust synten requirements a, c and d. 9 5. Auxiliary Building Pump Room Coolit.g System dW%

/d]

Auxiliary building pump room cooling system inspection, maintenance C c and testing requirements are the same as auxiliary building charcoal L M 5 s 4 E g ~, d 6, S I exhaust system requirements a through d. I t-a 31 zadyfd O .3 y f9.4.3 FUEL HANDLING BUILDINC VENTILATION Continous ventilation and exhaust of the spent fuel pool area and the fuel handling buildi:in results in an en.'ironment suitable for personnel and equipment. Additionally condensation from the fuel pool area and the release o f ai rborne radioactivity to the atmosphere is minimized. 9.4.3.1 Desien Bases O The systems for the spent fuel pool area are designed in accordance with the following: 1. Equipment motors and cont rols in the safety class portions of the O systems are supplied f rom Class lE electric power sources and have sufficient redundancy to satisfy the single failute criteria. 9 '-33 p s _ r 3/ Ap;l,t 9 t t

2. Provision is made for monitorinr, and manual control of the safety class portions of the systems from the control room. Operation of exhaust system fans and dampers is initiated automatically by a ~ loss of of fsite power signal. 3. The supply and exhaust systems provide continuous flow across the spent fuel pool water surface and provide controlled ventilation air flow in other fuel handling' building spaces. Ventilation air flow is from areas of -low to progressively higher radiation levels. O 4. Ventilation air is supplied to the fuel handling building from the auxiliary building by two non-safety related f ans. These fans are not automatically tripped during accident or high radiation situatons and will usually operate during normal and emergency conditions. One of two safety related exhaust fans is operated during normal and emergency conditions. Supply and exhaust air 19 flows are balanced so that a negative pressure with respect to the l outside of at least 1/8 inch water gage is maintained in the fuel handling building with both supply fans and one exhaust fan operating. Postulated failures of the non-safety related supply fans would result in a negative pressure of more than 1/8 inch which would provide additional assurance in preventing the outflow of unfiltered air. l ent a na Mw rect ug. a r ug&g, MA ad 13 charcoal filter assembly to minimize the radioactivity being released to the plant vent. Mind 7'9 " " 13 6. Provision is made to maintain a minimum fuel handling building 31 1 C e of 65 F. l 13 7. Provision is made to monitor normal and abnormal radiation levels in the area. l 8. The safety class and seismic category of the system components are 13 ~' as listed in Table 9.4-3. 9.4.3.2

System Description

The system diagrams for the various spent fuel pool area systems are as follows: 3/ AMENDMENT & 9.4-34 Ar,",I ii$1

gr. 3386

fg INSERT - SEE Pg. 9.4-33 9.4.2.4 Inspection and Testing Requirements eag

1. --

i 2. r r OK as it 3-16 4. 1 i o S'. ./ 6. Hot Machine Shop Ventilation System Hot machine shop ventilation system inspection, maintenance and testing /~5 requirements are the same as t.he auxiliary building charcoal exhaust system requirements a through d. 7. Hot Machine Shop Decontamination Ventilation System Hot machine shop decontamination ventilation system inspection, maintenance and testing requirements are the same as the auxiliary building charcoal i exhaust requirements a through d, plus inplace leak test of HEPA filters. m 8. Auxiliary Building Motor Control Center and Switchgear Areas Cooling System Auxiliary building motor control center and switchgear areas cooling system A inspection, maintenance and testing requirements are the same as the auxiliary building charcoal exhaust system requirements a through d. O

f INSERT - SEE Pg. 9.4-33 Yg nTILRT to A 9. Hot Instrument Repair Shop h System Hot instrument repair shop package HVAC system inspection, maintenance S and testing requirements are the same as the auxiliary building charcoal exhaust system requirement d. 10. Auxiliary Building Elevator tbchine Room Exhaust System Auxiliary building elevator machine room exhaust system inspection, maintenance and testing requirements are the same as the auxiliary building charcoal exhaust system requirement d. N9 WVAC

11. i Calibration Lab and Repair Shop -if

^ u_~>ns System Calibration lab and repair shop air conditioning system inspection, maintenance and testing requirements are the same as the auxiliary building charcoal exhaust system requirements b and d. A l l o

O Figure 9.4-11, Fuel Handling Building Charcoal Exhaust System 1. and Air Supply Distribution. 2. Figure 9.4-6, Auxiliary Building Main Supply System. Design and performance data are indicated on these figures. 9.4.3.2.1 Fuel Handling Building Supply and Charcoal Exhaust System The main components of this system include: 1. Two 100 percent capacity fuel handling building exhaust fans which draw air through the HEPA/ charcoal filter plenums. 2. Three 50 percent capacity filter plenums, each consisting of roughing filters (80 percent efficiency on NBS dust), HEPA 2 filters (99.97 percent efficiency on 0.3 micron particles), charcoal filters (95 percent efficiency on methyl iodide at ~ 85 percent relative humidity and 70*F), and final HEPA filters (same efficiency as previous HEPA filter). The filter plenum also includes a water deluge system. 3. A 100 percent capacity supply fan which directs outside air across the spent fuel pool surface. 4. Air operated, spring opposed dampers to isolate the supply and exhaust fans when not in use. r/lcH 5. One electric reheat coil in-Jikt supply duct. '3l 6. O Ductwork which directs the supply air to the spent fuel pool Vp Ato#5 AREAS of THE Sve6 psN43 3l surface, exhausts this air f rom the spent fuel pool surface Q 3/ 9.4-35 AMENDMENT & g $piI,1182

A g. Provide means for automatic operation of the exhaust fans upon receipt of a loss of offsite power signal, h. Automatically maintain minimum supply air temperature by con-A trolling the supply system reheat coil. 1. Indicate, in the control ro'om, supply or exhaust fan operation. j. Cause an alarm in the control room upon detection of exhaust fan motor trip. k. Provide for radiation monitoring (RM-A6) and cause an alarm in the control room upon detection of radioactivity levels exceeding { F the setpoint in the fuel handling building exhaust.(see Section o* u w 12.2.4). [g s <t#* The system continuously supplies outside air that has been drawn through ,u Q the auxiliary building supply air plenums where it is filtered and heated fQ as required. The supply air is directed across the width of the spent R fuel pool water surface so that gases or particles are entrained in the Og " push-pull" air flow above the water surface. The exhaust air is col-5* 1ectedalongtheoppositesideofthespentfuelpool.[Exhaustairis also drawn from various decontamination, holdup, filter and general

=

areas of the fuel handling building with air flow rates varying from 4 six to ten changes per hour. Ventilation air flow is directed from areas of low to progressively higher activity. Higher ventilation air Q flow rates occur in potentially high radioactive areas. The total exhaust from the fuel handling building is drawn through the Auxl LIAny 6v4LotW) 3l HEPA/ charcoal filters and ducted to the4 main exhaust fans and the main Q plant vent. Both fuel handling building exhaust fans operate following a loss of offsite power. Continuing exhaust flow maintains fuel handling building negative pressure under loss of offsite power conditions. The O A w dn.>3I ppe,Ii18L 9.4-37

9.4.4.2 Sys tem Description The system diagrams for the turbine building area ventilation system are as follows: 1. Figure 9.4-12, Turbine Building Ventilation System. 2. Figure 9.4-13, Turbine Building Switchgear Room Cooling System. 9.4.4.2.1 Turbine Building Ventilation System and Switchgear Room Cooling System The main components of this system include: 1. Seven 120 inch diameter roof exhaust fans with powered isolation dampers over the general turbine building roof. O 2. Three 48 inch diameter roof exhaust fans with powered isolation dampers over the heater bay roof. 3. Inlet wall louvers along the north and east walls of the heater bay and along the south wall of the general turbine building. 4. Two " draw-through" type air handling units for the switchgear rooms, y each with roughing filterg chilled water cooling coil, fan and motor section. ~ \\ 5. Supply and return ductwork from the switchgear units to the turbine [ room switchgear areas at elevations 412', 436' and 463'. 6. Eight thermostatically controlled electric unit heaters for the switchgear rooms. Chilled uutet is pu by T/g 7& rhin e boricling 5wtM M f m Roca s ddited luo* Syskm. Ja. 9.y.1a. it. 9.4-41

F 7. Instrumentation and control devices to perform the following func-tions: a. Measure the pressure drop across the switchgear room air handling unit roughing filter bank (local indication only). b. Cause an alarm in the control room upon detection of high tem-perature in the switchgear cooling system air handling unit supply duct or in the switchgear rooms, Cause an alarm in the control room upon detection of high con-c. centration of smoke in the switchgear room cooling system air handling unit supply duct or at the turbine building exhaust fans. d. Provide interlocks so that the turbine building exhaust fans do not operate unless the exhaust dampers a't the roof exhaust fans are open. e. Provide means for manual operation and control of the roof exhaust f ans f rom a local control station. f. Provide for operation of switchgear rcom cooling system air handling un ts f rom a local station W.4 3/

r. : automatic LtM P y means of roo>m ther.S contro g mostats.

g. Provide interlocks so that switchgear room cooling system air handling units do not operate unless isolation dampers are fully open, h. Cause an alarm in the control room upon trip of the switchgear room cooling system air handling unit. f)3,.Ae-r M 9.4-42 /

2. Furnish continuous outside air ventilation for the battery room system. 3. Safety Class 2b systems are designed for adequate physical separation and are so located as not to be affected by floods, weather, external missiles, jet impingement or pipe whip. ] 4 Equipment, motors and controls in Safety Class 2b systems are supplied f rom Class lE power sources and have sufficient re-dundancy to satisfy the single f ailure criterion. Provide, in the contr'l room, for monitoring of process condi-5. o tions and equipment status necessary for operation of the systems. 6. Provide for operation and manual control of the intermediate building ventilation systems as described in Sections 9.4.6.2.1,

9. 4. 6. 2. 2, 9. 4. 6. 2. 3, 9. 4. 6. 2. 4 em! 9.4. 6. 2. 5 f

7 A p 4. 8t. 0 2, s. 9.4.6.2 System Descriotion The systen diagrams for the various intercadiate building systems are as follows: 1. Figure 9.4-14, CRDM Switchgear Room Cooling System and Chiller Area Ventilation System. 2. Figure 9.4-15, ESF Switchgear Roors c:d Speed Switch Rooms Cooling Systecs. q. 3. Figure 9.4-16, Battery Room ?yu'.em.:d BOP Chq ger Area System. 3f 16 4 Figure 9.4-17, Intercediate Building and Intermediate Building Punp Rocc Cooling systems. 31 9.4-45 AMENDMENT E5 , PRF hprN IS$1 j

g. Cause an alarm in the control room upon detection of air han-dling unit motor trip. The pump room air handling units start aatomatically with their res-pective pump. The air handling units remove heat generated in the pump Air handling units are supplied by separated Class IE ' power rooms. sources and are located in separate equipment rooms in the intermediate-building. 9.4.6.2.6 Water Chiller Area Ventilating System The main components of this system include: 1. One ventilating fan arranged to supply, relieve and return outside ven-tilating air. 2. One duct mounted heating coil. 3. Ductwork with control dacpers and fire dar:pers arranged to supply, 2 relieve and return air as required. 4 Instrumentation and control devices to perform the following functions: a. Cause an alarm in the control room upon detection of high smoke concentration in the return air duct. b. Cause an alarm in the control room upon detection of high temperature in the fan discharge, pdD c. Automatically control the outsid return M dampers 3I and the heating coil using a te=perature controller which senses return air temperature. 31 9.4-53 AMEDMENT Y MRE. EEET Ardi j i982

1. Figura 9.4-18, Diossi G;nsrctor Building Ventilation System. 2. Figure 9.4-19, Service Water Purphouse Ventilation System. A 3. Figures 9.4-20 and 9.4-21, service Building Ventilation System. 4. Figures 9.4-22 through 9.4-24, Chilled Water System. 5. Figure 9.4-25, Industrial Cooling Water System. 6. Figure 9.4-26, Substation Relay House System. p 7. Figure 9.4-26a, Penetration Room Ventilation System. 8. Figure 9.4-26b, Miscellaneous Pump Room Systems and Lube Oil Room System. 9. Figure 9.4-26c, Water Treating Area Laboratory Heating and Cooling System. 10. Figure 9.4-32, C ooling Water System. 26 ll. Vi907e 9o4-33,4 uML -Tarb*u !LL:W $ubNy Roo M 3I Design and performance data are provided on these figures. 9.4.7.2.1 Diesel Generator Building Ventilation System 1 The rain components of this system for each diesel room include: 1. Two 50 percent capacity ventilation fans to supply outside air to the diesel generator room, the diesel generator electric equip. 16 O cent room, and the diesel generator cable-pipe-basement area. 2. Air operated, spring opposed dacpers with damper position limit switches to isolate the ventilation supply fans when not in use. l 3. Ductwork to connect the two supply fans and distribute supply air l to the various diesel room areas. 1 O 4. Instrumentation and control devices to perform the following func-tions: 1 1 Cause an alarm in the control room upon detection of high smoke a. O concentration in the discharge of each fan. yg 9.4-57 AMENDMENT'M O MEE I!EE1 $pe,*l I f f L i 1

1 Cause an alarm in the control room upon detection cf high smoke a. 2lI paTuRM Duct *11 E ACH ra tl. concentration in the _f n- . ;ir en j u 2. b. Cause an alarm in the control room upon detection of high tem-perature in the discharge duct of each ventilation supply fan, Indicate, in the control room, open and closed positions of c. 3 ventilation supply fan isolation, outside, return and relief air dampers. d. Cause an alarm in the control room upon detection of excess vibration of the ventilation supply fans. c. Indicate, in the control room, the air flow rate in the out-side air supply ducts to the ventilation supply fans. 3 f. Aut matically control outside, return and relief air damper ~3 li Rerunn A'R. [ position by ceans of a W temperature controller. g. Provide means for manually operating the ventilation system fans from the control room. These fans are interlocked with the associated inlet isolation dampers. 1 h. Provide an outside/ return air manual control station in the ( control room. 1 1. Provide means for autceatically starting the ventilation air supply fans upon receipt of a safety injection or loss of 3 ffsite power signal and bypassing the discharge temperature controller upon receipt of a safety injection signal. I j. Indicate, in the control room, high and low ambient tempera-1 3l tures in the - /ScRccM - 4 " % m a F1 D lt) Tic i T CH f[d at R C0N$

Pur4 P R *e v
a-

-a -a*-- - - - - ^ ' cv: m.

0. 4-(.O AMENDfENT m,m l}fr o'l, 81 S t

f-% k. Indicate, in the control room, ventilation supply fan operation. 1. Cause an alarm in the control room upon detection of ventila-tion supply fan motor trip. O Either of the two supply fans operates continuously during normal op-erating periods. Both fans start Automatically following receipt of a safety injection or loss of offsite power signal. muerreturn AtVO A88F Outside'$ETund AlfL j3I 77 air damper positions are automatically controlled by a -;: tem-9' perature controller. Alternatively, position of these dampers can be manually controlled by a hand control station in the control room. The fans are powered from separate Class 1E power sources. The fans are manually started from the control room or are automatically started as previously noted. The air handling equipment is located in a shielded (R H

r room above the equipment areas. Ductwork in the equipment areas is fireproofed.

Fireproofing is accomplished by " boxing-in" the duct.w t -"^=4

i - l _ n ". :.. in 1; - i _. _ ice "'.:2434" q

ig ra M c;it. 5"--, _ % - " ~4 = ' ret:1 lath; M m sucu um 4-1 o-4 '1-++f 11m ~ J..mc heur fire rr 3 System operation is mr7 monitored from the control room. {

9. 4. 7. 2. 3 Service Building Ventilation System The main components for this system include:

1. Two zoning type air handling units, one to service the office areas l of each floor of the service building. Each unit consists of a f-g zoning damper section, an electric heating coil, a direct expansion cooling coil, a fan section and a roughing filter section. i f"'s 2. Two roof mounted, air conditioning units to service the meeting l 2 roo= and kitchen. The units consist of a roughing filter, a direct expansion cooling coil, fan section and a refrigeration and con-densing section. O 3I 9.4-61 AMENDMENT O y - ~,- :K7 Apiol/132 l

l e. Automatic control of the storage room and meeting room system ], reheat oils in response to space temperature and air handling unit operation. The units are manually started and stopped from local stations with auto-O matic control of heating and cooling and outside, return and relief dampers. Equipment is supplied with normal power, ne zoning type air handling units are located in an equipment room on the first floor of the service building. The storage room unit is located on the northeast portion of the first floor. 3 The meeting room unit is located outside on the roof. Condensing units fur-nishing the chilled refrigerant for the zoning air handling units are also l located on the roof. l Chilled Water System [b h4 /dt/s . b d 6 0 b' '#1 9.4.7.2.4 Bui Icli9 wo lehyta.r Eea ms Ch Illed t<ja.My.s-km 7.</.71. ti.) M S The main components of.this system include: 1. nree 100 percent capacity centrifugal type, electric motor driven ] water chilling machines. 2. Three 100 percent capacity chilled water pumps. 3. Chilled water cooling coils for the following areas: ) a. Charging pump rooms ^ __.;;. l b. Residual heat removal / reactor building spray pump rooms C Q. Emergency feedwater pump areas -d gis. c. M d. Service water booster pump rooms 6 I e. CRDM switchgear rooms 2 _1.,. m:itcherr---^ 4 ? eilr-d h sf. -xt ' = $ ~ ' ' ' ' r g ESF switchgear rooms - ? m ihr. O \\ bda.e 415 3/ Apr U lT 8 2. 9.4-63 O 1

p Jf. Control room [ C 4 7ccIn.ced gr&g h.#. Controlled access area "ir i, g.' Relay roo /2:toi16 72cMd'e # @#E v,g,=wkn. g,f r e<< s smputer toom #adhsfEcart e contaree XX n=x s w = '= r"= -M- = ,2, [ BOP charger area M. Pr\\,nf Auxiliary building motor control center cooling units 6. W I@D-4. Pump motor cooling jackets for component cooling water pumps. E' p en.e r~en *el e*ols' c h ey,pg p noa ([. Piping supply and return mains with expansion tanks, chemical feed system and provisions for balancing, manual and automatic isolation of portions of the system. 7/. Instrumentation and control devices to perform the following fune-tions: a. Cause an alarm in the control room upon detection of low chilled water flow. b. Indicate, in the control room, which chiller and chilled water 7 pump are energized. c. Cause an alarm in the control room upon detection of chilled water pump motor trip. I d. Cause an alarm in the control room upon detection of low chilled water pressure in pipe mains. Indicate, in the control room, chilled water temperature in the e. supply pipe mains and cause an alarm in the control room upon detection of high or low chilled water temperature. 3! 9.4-64 AMENDMENT F EEE,~1927 Afv'l,818 2

1. /

\\ l '~') 9.4.7.2.6 Substation Relay House Cooling System The main components of this system include: . /~') 1. One 100 percent capacity self-contained cooling unit consisting of casing, roughing filters, direct expansion. cooling coils, fan and motor section and controls. (3 2. One 100 percent capacity air' cooled condensing unit consisting of refrigerant compressor, condensing coil, condenser fan and motor section and controls. 3. Ductwork system with outlets, balancing devices and electrically operated outside air dampers. 4 Refrigerant piping system between condensing unit and cooling unit. N 5. One 100 percent capacity, wall mounted, battery room exhaust fan. 6. Five electric unit heaters for the relay room and storage areas. The substation relay house cooling unit operates continuously after local manual start and is subsequently controlled automatically by self-contained equipment controls. Equipment is supplied from normal power supplies. No provisions are made for power supplied from an emergency source. The air handling unit is located along the east end of the substation relay /~'N house. The condensing unit is pad mounted directly outside. 9.4.7.2.7 Penetration Access Areas Ventilation System /~'\\ The main components of this system include: 2 l. Twleof UM Cepl( t>< hr.end {d.ns. 1 Lad' Two 50 ' percent capacity ventilation supply air fans for each of the following locations: O si l AMENDMENT F l 9.4-69 m SEER Nr;I, sis L

a. Elevation 412', east penetration area, b. Elevation 412', west penet ration are.a. c. Elevation 436', east penetration area. d. Elevation 436', west penetration area. d daMle d a 3Z Aftetwork with outlets, control dampers and, intake - ' n i_'__' provisions. EkhauJf af,,dured:. uoN hb I S&wf f.AA M M-Q g dia(MektpM5 low $. 4 Instrumentation and control devices to perform the following func-tions: = -A u glarm in the control room upon detection of high con- ^ a. centrations of smoke in each penetration a e vpm4fam%oln-41.ca 53ive. edaad % viheJton, W q aw d echaud 4 $sw qtm 1 M u.=l 4:y:ab n Q' ' Q/p g M 4sh Lur & ttsmufg b. Ezoarid :

^-

"'" ; - rrl; fans from 1searl control stations. The fans are also interlocked with their dampersuduhho Wb b %# M respective i' fa. m s M usce n. Automatically control outside and return air dampers in response c. to a room thermostat. aA4e c.b Sk d. Indicate, 11 ^^ ... h. - -. c fanoperatiog.

2. 8 LL%

Y Gb GWh % s a &n & t. w & t. a.

p cn ac t c c tica c _,$. " de Ve..

G vwemif in thc centrcl ree ir%cew .:Pt C: c a.. ale-m - reter E W Ihe f ans operate continuously af ter manual start from the local control stations. The amount of outside air introduced is controlled autettat-ically by a room thermostat. The fans are powered from a non-Class 1E power source. t~t HA sesi A IA is oisenn nAc e T*

- " **A*

Tunu tnt PL re nT* V CNR i 3I 9.4-69a AMENDMENT $ 3E!E,19B di. A#r'el 19$ 1,

d. Provide local indication of fan operation. E Provide control room indication of fan motor trip in the e. turbine lube oil treatment room. f. Provide, thermostat control of electric unit heaters. Roof ventilators and dampers operate. automatically in response to thermostats after manual start. Unit heaters operate in response to integral thermostats. Equipment is povered from non-Class lE power ~ sources., b ~ 9 ' 7.2.9 Water Treating Area Laboratory Heating and Cooling System 2 The main components of this system include: 1. One package type heating and cooling unit, including direct ex-pansion type air handling unit with electric heating coil and roughing filter and refrigerant condensing unit. 2. Two laboratory hood exhaust fans and a chemical storage area'ex-haust fan. 3. Thirteen electric unit heaters in the chemical storage and general floor areas. 4 Ductwork connecting the air handling unit with the sample room and the water treating laboratory and for supply and exhaust of the laboratory hoods. 5. Instrumentation and control devices to perform the following functions: 30 9.4-69c RIENDMENT 2 Jamt, Issi Av*l,Ittt

9.4.7.2.10 CRDM Cooling Water Systen The main components of this system include: 1. One CRDM Cooler Rack Assembly which is an air to water heat exchanger. 27 m 2. One CRDM Cooling Water Industrial Cooler, including two electric heaters, eight forced convection fans, and four circulation pumps. 3. One Expansion Tank to control thermally induced water volume changes. m 4. Two 100% Circulating Water Pumps, including a bypass line with a chemical feed tank. 5. Four motor operated containment isolation valves, including two check valves on bypass lines on the Reactor Building Side. The system is designed to remove heat from the containment air used to cool the Control Rod Drive Mechanism (CRDM) and dissipate this heat to e the atmosphere via the Industrial Cooler. The system can operate continuously while the plant is in operation. System components are powered from non-Class IE power sources, except for the motor operators on the containment isolation valves, which are supplied from Class 1E power sources. 3I T.H.usii (.See insert) 9.4.7.3 Safety Evaluation The service building ventilation system, industrial cooling water systemj dad' substation relay house Cooling syste perform no safety fuuCtion. The CRDM Cooling Water System performs no safety function except for the 26 containment isolation valves where motor operators are supplied by Class IE power suppliers. They do provide acceptable temperature levels in the 'k various buildings. p1/crf Qw Accc4 CLAMWA 7hract[{cMeow mj s'wtnn vrw A 4 lulM cia %w A. , Ohh d S Ahordovy %Lg 4 Lad och h St.J'fu, S ^ M p N. % r% CSdEEcA A s 9.4-9e 3I AMENDMENT 2? N, 'E!fli pr41,19SZ

INSERT - SEE Pg. 9.4-69e R 9.4.7.2.11 Turbine Building Switchgear Rooms Chilled Water System The main components of this system include: R 1. One air-cooled, electric motor drive, reciprocating water chiller. 2. One primary water pump. 35 '3. Two 100% capacity s'econdary water pumps. 4. Chilled water piping system including a compression tank, an air separator, a chemical feed tank, and valves. 5. Chilled Water Coils - one coil in each of twc redundant turbine building switchgear rooms air handling units. Each coil has two connections. 6. Instrumentation and control devices to ^ perform the following functions: a. Control the chiller. Included in a factory-furnished, factory-wired controls are a positive-acting timer to prevent short cycling of the compressors and to delay restart after shutdown, high and a low pressure refrigerant safety pressurestats to stop the compressors, a multiple-step water temperature controller, a chilled water safety th ermostat, circuit breakers, motor contactors, control relays, a a control circuit ON-OFF switch, and a chilled water flow switch. The chiller energized automatically when primary flow is established. A .,e

INSERT - SEE Fg. 9.4-69e N b. Control the primary pump. The pump is started by a remote manual switch. The pump will shutdown on a chiller malfunction. O c. Control the secondary pumps. These pumps are redundant and each is wired to run only with its respective air handling unit. The active pump is controlled by one of three parallel - wired room ON9 thermostats. d. Indicate locally the level of water in the compressor tank and alarm of low level in the control. e. Alarm in the control room of low water flow, f. Indicate locally the temperature of water entering and leaving the h chiller and provide a computer high temperature alarm and CRT display in the control room of water leaving the chiller. g. Indicate locally the pressure of water entering and leaving each pump. j Under normal conditions, the primary pump continuously circulates water i in the primary pipe loop. This water is maintained.at 45 F by the chiller which loads / unloads and cycles automatically under its self-i contained controls. The secondary pump circulates water between the primary loop and the chilled water coils identified in Section 9.4.4.2.1, subitem 4. II It cycles upon demand of room thermostats. The system is non-nucicar safety class.- l l O 1 l e l

-89 6 Embuur: Additionally, the substation bettery room exhaust fan in the substation relay house cooling system prevents the occurrence of O any appreciable hydrogen concentration in the battery room. The diesel generator building ventilation system, service water pump-house ventilation system and chilled water system do perform safety A functions since total loss of the heat removal capability of any one s of these systems could produce conditions affecting the safety of the These systems are designed with redundant equipment and piping plant. systems and are so arranged, serviced and maintained that complete loss Each of the M of system function or system cooling is highly unlikely. safety class systems is located in equipment rooms accessible for main-tenance but not subject to floods, weather, external missiles, main Each is supplied steam line break effects, jet impingement or pipe whip. by separated Class lE power supplies. The safety class systems are administrative 1y controlled from the control room. Operation of the diesel generator building ventilation system is automatically initiated Operation of L'.te service water pumphouse ventila-by diesel operation. ( ystem and the chilled water system are automatically initiated by tic.. Safety O receipt of a safety injection or loss of offsite power signal. class systems are monitored and alarms are annunciated in the control room. 9.4.7.4 Inspection and Testing Requirements The miscellaneous building ventilation and cooling systems are subjected to preoperational testing to verify proper wiring and control hookup, system "in-place" integrity and leak tightness, proper function of sys-tem components and control devices and to establish system design air O To ensure a continued state of readiness of the and water flow rates. miscellaneous building ventilation and coolirs aystems af ter completion .nu c: tion, maintenance and of the preoperational tests, the following j test procedures are performed: pwkwr 3I ppd I182

- - ~
p

mg---, r u._ 3/ - Ti _ _- -m... O a. Verify function of dampers or control devices necessary for menitoring er ccoponent isolation or changeover from normal to emergency code. O b. Bearing lubrication. c. Switch components from standby to operating mode. f 3 :;... " --- 7 ,4 _ c.'Jentilr-': C,m r ~ c t ic, -- u.m = _ ;; g,,,, , m,,,, g 3_ a re j,,, _ ;- _-- _ gi- _1 ; - ~ c : ': ! ' ' 4 =, - 2 12- ;- ; _. xt- - t c :

)l

-- 3. - __.._... -g;L d= r 7 7 nir.,==i------- - :i _ -- - - L - -r @_ ; r _; rnted dica:' ge ncr2t -% tid 9 pant 41 ntion-avar-- r= ~ O ) 9.4.8 REACTOR BUILDING COOLING AND FILTERING SYS1 EMS Under normal operating conditions, continuous circulation and cooling of the reactor building air is required to maintain the ambia.nt air temperature at a suitable level for continuous operation of equipment within the building. t Under shutdown conditions, heating and cooling of the reactor building A is provided by the ventilation system as required. Cleanup of the reactor building atmosphere is required before purging to minimize the release of radioactivity to the environment. Purging ) 9.4-71 ql- ] p s h +*T Il Ap:1, t%t 1 =.m-

n. Massure, record, and provide high rediction cicrma cnd intericcks to close purge supply and exhaust isolation valves on the occurrence of high radiation Icvels in the manipulator crane area of the reactor building (RM-G17A and RM-G17B) (see Section 12.1.4). Close the purge supply and exhaust isolation valves upon receipt of 16 n. a containment isolation signal. The 36 inch reactor building supply and exhaust system may be operated during cold shutidown and refueling to maintain suitable radiation levels i F inside the reactor building. ~f'- - - n f i : i_c. J m y 4 -V -w - - u p,t i g 7_-- g..... e - 94 ;;--i mA. ~. 7_ N , _y _ - _ ;. ;; - i -- - % + ' _ ;-_ s m L _ La ;e-A y_ - w YL th; K '- b ui E..s w..-J This system is operated prior to ~ personnel entering the reactor building to reduce radiation levels inside. The 36 inch purge system supplies filtered and tempered outside air to 17 the reactor building and exhausts air from the reactor building through HEPA and charcoal filters to the purge exhaust vent. 'lhe 36 inch purge system.is powered from normal power sources, except for the solenoid valves and limit switches associated with the system containment isolation valves. These components are powered from Class IE power l sources. System equipment is operated and monitored from the control The 36 inch purge system supply and exhaust fans and plenums are room. located in the auxiliary building. 'Ihe 36 inch purge system and the 6 inch alternate purge system (see Section 9.4.8.2.3) use common outside air supply and exhaust vents, a common outside air intake damper and a common exhaust filter plenum. In other respects these two systems are separate. 9.4. 8. 2.3 Alternate Reactor Building Purge System O Major components of the alternate reac tor building purge system include 16 the following: 1. One 100 percent capacity pressure blower to supply filtered outside air to the reac tor building.

9. 4 -7 7a y

AMENDMENT'M pfhI, I9 $ L pgxsagay, pseg

O canal and refueling cavity. The exhaust from this system is directed to the reactor building purge exhaust system. Each unit is supplied f rom normal power supplies. The fans are operated from a local control station. The supply and exhaust fans are mounted on the secondary compartment shield walls above the operating floor. The rod position indication cooling system operates continuously during normal operating periods to maintain the rod position indicator data D cabinet at a suitable ambient temperature. The air handling unit is 2 served by normal power supplies. The cooling coil is supplied from the service water system. The air handling unit is located adjacent to the rod position data cabinet. 9.4.8.2.8 Reactor Building CRDH Shroud Cooling System 16 The main components of this system include: A 1. Four 50 percent capacity exhaust fans to draw general reactor building arbient air through the CRDM shroud for cooling. 2. Gravity dampers to isolate the inactive fans. 3. Ductwork connecting the exhaust ports of the CRDM shroud to the 00 inlet connections of the exhaust fans. 4 c%e coas.ttt gnck, a ssE*46LY 1r4 Osselintee t P ucT' Leo n AS DEc ett t S CO IN s Jr errerr 9. 't. 7, 2. 3 0. y f. Instrumentation and control devices to perform the following func-tions: a. Indicate, in the control room, the temperature of the air 1 caving the CRDM shroud and cause an alarm in the control room upon detection of high air temperature. 3l 'A 9.4-83 AMENDMENT M nozzassa, m Neil, s 4 SL

( e. Catise nn alarm in the control room upgn datection of excessive 3 q fan and motor vibration. f. Indicate, in the control room, fan motor status. A g. Cause an alarm in the control room upon fan motor' trip. Two of the four fans operate continuously during normal operation so that suitable operating temperature is maintained around the CRDM. N Operation of the fans draws cooled reactor building air over the mechanisms where the heat is removed, through connecting shroud nozzles

7hr gyg h r M CA Dtt teetrA (AcA AJam a ty 3)

[totheexhaust fans where it is discharged to the reactor building g atmosphere. Each fan is supplied from a normal power source. However, 2 provision is made to manually connect one unit to a Class IE bus. The fans are operated and monitored from the control room. The fans are located below the operating floor. 9.4.8.2.9 Reactor Building Elevator Machine Room System O Major components of the control building elevator machine room system include the following: 1. A 100 percent capacity exhaust fan. 2. Fixed, wall inlet louvers. 3. Instrumentation and control devices to automatically limit maximum elevator machine room temperature by cycling the exhaust fan. 17 i The system cylically exhausts air from the elevator machine room to the general.open area of the reactor building in response to a room thermostat when normal power is available. Makeup air from the general open area of the reactor building entars the room through fixed, wall inlet louvers. Equipment is located in the reactor g building elevator machine room wall. t 3I 9.4-84 AMENDMENT H E980 =: -w heil,85t2* I

) ) ) %1 s ) ) peJ. -r31 TABLE 9.4-2 (Additional) p;/ IM2 NORMAL NORMAL CONDITIONS SAFETY SEISMIC SYSTEM SYSTEM FUNCTION MAINTAINED CLASS CATECORY llot ?! chine Shop Supply filtered tempered 65 F min. NNS None Vent dation System air. Exhaust air to the Fuel 104 F max. Ilandling Building exhaust filter plenum. Maintain a negative pressure dif ferential with respect to outside. Ilot Machine Shop Supply filtered tempered air. 65 F NNS None Decentamination Area llEPA filter exhaust air and Supply Air Ventilation System direct to plant vent. Auxiliary Building ' Provide cooling to three 75 F 2 units-2b I Motor Control Center areas, each with its own air 1 unit NNS None and Switchgear Areas handling unit Cooling System Q \\ IIn t Ins t rur.en t Repair Provide space heating and f6 NNS None 7 Shop Ventilation System cooling ,,3 Auxiliary Building Provide space cooling Of[MX NSS None p Elevator Machine Exhaust System Wf Calibration Lab Provide space heating, cooling pg NSS None and Repair Shop Ileat Pump and ventilation 4r F mm, ' h a

AMENDMENT!r 3/ temen, m s fyrol 173 L DRAk'ING NUMBER FSAR FIGURE NIMBER C ll4E073 9.3-16 114E077 11.2-2 and 11.3-4 D-302-161 .9.2-8 C D-302-222 9.2-2 D-302-841 9.4-22 D-302-842 9.4-23 D-302-843 9.4-24 32-Sos 84Y 9,tf - 3 3 7 D-302-851 9.4-25 - 9 4-31 3/ D->c2-85'2 D-912-102 9.4-27 g D-912-103 9.4-28 D-912-104 9.4-29 D-912-105 9.4-30 D-912-106 9.4-31 D-912-115 9.4-6 D-912-120 9.4-7 D-912-125 9.4-8 9 D-912-130 9.4-9 D-912-131 9.4-11 D-912-132 9.4-10 D -f rJ.-lh T.q-lo b - Sj i D-912-134 9.4-18 l D-912-136 9.4-2 D-912-138 9.4-16 l D-912-139 9.4-14 e l D-912-140 9.4-1 D-912-144 9.4-3 D-912-147

9. 4-4 D-912-150 9.4-10a l

D-912-151 9.4-20 3 ~ SOUTH CAROLINA ELECTRIC & GAS CO. VIRGIL C. SUMMER NUCLEAR STATION ( _ Section 9.4 Drawing / Figure Cross-Reference Sheet (Sheet 1)

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ML20054B992

Contents

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Dear Mr. Denton:

System Description

System Description

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ML20054B992

Text

Subject:

Dear Mr. Denton:

System Description

System Description

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