ML20101G669
| ML20101G669 | |
| Person / Time | |
|---|---|
| Site: | 05200001 |
| Issue date: | 05/26/1992 |
| From: | Fox J GENERAL ELECTRIC CO. |
| To: | Burton B NRC |
| Shared Package | |
| ML19311A863 | List: |
| References | |
| NUDOCS 9206260231 | |
| Download: ML20101G669 (14) | |
Text
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MAY 26 '?2 12126PM G E NUCLEAR ELDG J_
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TD Fax No.
To This page plus _2 \\ page(s) t From Jmck F ov Mail code 79 L 175 Curtner Avenue San Jose, CA 95125 Phone (408) 925 4 8M FAX (408)925-1193 or (408) 925-1687 Subject FPC Open I4c-s em J
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May 26. 1992 To: Jack Fox I4ke<4~~J From: E.V.Na)areno i
Re: ABWR FPC System Open items l
l Thermal transient analysis was performed to determine how it will take for the pool temperature to exceed 140 F lon6 (normal maximum heat load) or boil (abnormal maximum heat or no pool cooling is being load) if one TPC train is lost, performed.
Tabulated below are the results of the analysis. With the gates closed (21 days after shutdown), single failure was postulated for the normal and abnormal maximum heat loads.
Also, thermal analysis was performed with no cooling for both the normal and abnormal cases.
The analysis showed that the operator has plenty of time to
.. fire hoses). Considering the proximity of the react (i.e.
fire hoses ( about 30 feet), it is expected that it will 30 minutes for the operator to deliver fire water take about into the pool For the worst case (no cooling with abnormal maximum heat load), the pool temperature will reach boiling 16.2 hours2.314815e-5 days <br />5.555556e-4 hours <br />3.306878e-6 weeks <br />7.61e-7 months <br /> after the start of the transient. During the there will be no appreciable loss of pool water
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transient, since there will be no boiling.
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4 FPCS SINGLE PASSIVE PIPE FAILURE AND SINGLE ACTIVE FAILURE THERMAL TEANSIENT ANALYSIS 21 DAYS AFTER SHUTDOVN Decay Heat Initial Pool Time To Time To Heat Up Case Conditions Removal Temperature Reach Reach Rate Performed By t -21 days 140 F 212 F o
Normal Max. Heat Load Pool Gates Closed 1
Single Failure of FPC 1-FPC Train 125 F 1900 Min.
0.5 F 0
(31.7 Hrs)
Per Hr.
No RHR S>1plemental CooLLng So Emergency Make Up Normal Max. Heat Load 2
Pool Cates Closed 0
2.24 F Passive Failure of NONE 125 F 400 Min.
Common RHR/FPC pipe (6.7 Hrs)
Per Hr.
No Emergency Make Up Abnormal Max. Heat Load 0
4500 Min.
1.16 F 3
Pool Gates Closed 1-FPC Train 125 F Single Failure of FPC (75 Hrs.)
Per Hr.
No RHR Supplemental cooling No Emergency Make Up Abnormal Max. Heat Load Pool Cates closed NONE 125 F 970 Min, 5.4 F Passive Failure of (16.2 Hrs)
Per Hr.
Common RHR/f?C pipe No Emergency Make Up 4
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insert (e)1 On a' smoke in a division of the MCR HVAC,-that division of HVAC system is--.
ior smoke removal, the exhaust fan is stopped, put-into smoke removal mode.
the recirculation duct valve is closed, and-the fan bypass -valva is opened.
Either division of MCR HVAC can be used a's a smoke removal system, insert (b)_
On a smoke alarm in a division of the Control' Building Essential Electrical' HVAC System, that division of HVAC shall be put into smoke removal mode.
For smoke removal, the No other division is effected by this action.
recirculation duct valve is closed, the fan bypass valve is opened, and-the exhaust fan is stopped, insert (c)
On a smoke alarm in a division of the-Secondary Containment HVAC system, the-HVAC system shall be put into smoke removal mode. To remove smoke from the secondary contaiment, the standb) exhaust and supply fans are started to The provide an increase in air flow through tho' secondary containment.
divisions that are not on fire shall have their exhaust dampers-closed to a This position shall shall be set during system partial closed position.
setup. When the exhaust valve are partially closed, the nonfire divisions 7tessure will be maintained at a negative pressure. The fire division will be maintained more negative-with respect to the nonfire divisions.:
insert (d)
On a smoke alarm in a division of the-Reactor Building Essential Electrical HVAC System, that division of HVAC shall-be put into smoke-removal mode. No other division is effected by this action.
For smoke removal, the recirculation duct valve is closed, the fan bypass valve is opened, and the exhaust fan is stopped.
insert (e)
On an alarm of exhaust fan or supply-fan failure, the standby fan is automatically started, and an alarm is sounded inside the control room indicating fan failure.
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MN wa Standard Plant 9.4 AIR CONDITIONING (3) The outside design conditions for the control HEATING COOLING AND toom HvaC system are its*F during the VENTILATION SYSTEMS summer and 40 F during the Mnter.
9A,1 Contreiiittildir.g HVAC
- :.1.1.0 System Descriptk's -
The control building heating, ventilating and The control room is heated, cooled and pressurized air conditioning (HVAC) system is divided into two by a recirculated air system with filtered outdoor air separate systems. A HVAC system for the control for ventilation and pressurization purposes. The room equipment on the top two floors. Plus a recirculated air and the outdoor air will be mixed and IIVAC system for essential electrical and heat ex-drawn through a filter section, a heating coil section, and a cooling coil section. Under normal conditions, hanger equipment.
sufBeient air is supplied to pressurize the control room 9A.1.1 Control Room Equipment HVAC and exfiltrate to preuvrize the control building.
The control building HVAC P&lD is shown in 9A.1.1.1 Design Basis Figure 9.41. The control room flow rate is given in (1) The control room (HVAC) system is designed Table 9.4 3, and the system component descriptions with sufficient redundancy to ensure operation are given in Table 9.4 4 The control building under emergency conditions assuming the recirculation unit consists of a medium grade bag ' ~h 4
single failure of any one active component.
filter, a heating coil, cooling coil, two'50% capacity supply fans, loog 4
(2) Provishns are made in the system to detect and limit the introduction of altborne radioactive
).g Two'30% capacity return exhaust fans draw air materialin the control room.
from the electrical area, corridors, control room, (3) Provisions is made in the system to detect and computer room, office areas, and the HVAC equip-remove smoke and radioactive material from ment room. This air is returned to the air condition-the control room.
ing unit during normal operations. Modulating damp-ers in the return duct work to the fans are controlled (4) The HVAC s) stem is def gned to provide a by a pressure controller to maintain the required 3
controlled temperature environment to ensure positive pressure. The controller is low,ed in the the continued operation of safety-related equip-electrical equipment area. O_' ; __i _ -d
- tuent under aceddent conditions.
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(5) The HVAC system and components are lo-cated in a Seismic Category I struernte that is An emergency recirenlation system consisting of an %,
tornado. missile and Good protected, electrical heatingcoil, a prefilter, HEPA filter, ch coal adsorber,45d HEPA filterp d outdoor and
'ia providedjarallel to the normal mixe
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(6) Tornado missic baniera are provided for intake return air path to the supply conditio charcoal adaorber will be 2 inches deep as a minimum.
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and exhaust structures.
9.4.1.1.2 Pour Generstlos Design Basis The system is normally on standby for use only during high radiation. A radioactivity monitoring syster.:
(1) The HVAC system la designed to provide an monitors the building intakes for radiation. The j
environment with controlled temperature and radiation monitor allows the control room operator to humidity to ensure both the comfort and safety seteet the safest intake. The makeup air for 4
of the operators. The nominal design condi-pressurization can be diverted through the HEPA and j
tions for the control room environment are charcoal adsorbing system before distribution to the 75 F and 50% relative humidity, control room areas.
(2) The system is designed to permit periodie in-Smoke detectors in the control room and the con-spection of the principal system components.
trel equipment rcom exhaust systems actuate se 9.41 Amendment 17 4
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The safety.related isohrina valves at the outside air alarm on indication of smoke. " _m.-b 1.'
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intakes are protected from becoming inoperable due
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- J r ?: f: ':: d: ::rn! i "?:,, !!"' N+ g The HVAC equipment space is phnically sepa-5 - - --- ^ ? E' _ f ^i ' ' '
rated into divisional rooms. Each divisional room
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consists of an air intake room and an air eahaust 9A.1.1J laspectica andTesting Requirements room.
Proviatons are made for periodic tests of the out.
9A.1JA Safety Evaluation door air cleanup fans and fikera. These tests include The control building HVAC sptem is designed to determinations of differential pressure acrou the maintain a habitable environment and to ensure the filter and of fiber efficency. Cenio. i for testing, operability of components in the conuol room. All such as injection, sampling and monitoring are prop-control room HVAC equipment and surrounding erly located so that test results are indicative of per.
structurca are of Seismic Category I design and oper.
formances able during loss of the offsite power supply.
The high. efficiency particulate air (HEPA) filters The ductwork which services these safety functions may be tested periodleally with dioctyl phthalate is termed ESP ductwork, and is of Seismic Category smoke (DOP). The charcoal filters may be periodi.
I design. ESF ducting is high pressure safety grade cally tested with freon for bypar sea, ductwork designed to withstand the maximum posi-The balance of the sptem is proven operable by its the and/or negative pressure to which it can be sub-use during normal plant operation. Portions of the jected under normal or abnormal condicions. Galva.
system normally closed to flow een be tested to nized steel ASTM A526 or ASTM A527 is used for outdoor air intake and exhaust ducts. All other ducts ensure operability and integrity of the system.
are welded black steel ASTM A570, Grade A or Grade D. Ductwork and hangers are Scismic Cate-9A.2J4 Instmanentation Applicatian gory 1. Bolted flange and welded }oints are qualified The area exhaust fan is started manually and the fan per ERDA 76-21.
discharges the air to atmosphere.
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Redundant and independent cornponents are pro-A high radiation rignal automatically starts the out.
' vided whre neccanry to ensure that a siric failure door air cleanup system, closes the normal air inlet will not preclude adequate control rocen ventilation, damper and closes the exhaust air dampers.
A radiation monitoring sysics is provided to deted high radiation in the outside air intake ducts.
. A temperature indicating controller senses the tem.
A radiation monitor is provided in the control room perature of the air leaving the air cleanup system.
The controller then modulates an clearic heating coil to monitor controlroom area radiation levels. nese monitors alarm in the ecatrol room upos detection to maintain the leaving air temperature at a preset of high radiation Mian Isolation of the control limit. A limh switch will cause an alarm to be actu-room and initiation of the outdoor air cleanup unit sted on high air temperature. A moisture sensing fans are accomplished by the following signals:
elen2ent wockmg in conjunction with the temperature controller measurca the relative humidity of the air (1) high radiation in the inside air intake duct, enteringthe charcoalabsorber.
and Differential pressure indicators show the pressure drop across the prefilters and the HE' A filters. A (2) manualisolation.
differential pressure indicating switch also measures Under normal conditions, sufficient air is supplied the pressure drop across the entire filter train. The to pressurize the control room and exfiltrate to pr'es-switch causes an alarm to be actuated if the pressure
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drop exceeds a preset limir. A flow switch in the out.
surize the controlbuilding.
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door air :Icanup system fan discharge duct automati.
the heater and demisters. Tbc heaters and demisters
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n"y starts the sta;ddy system and initiates an alarm are put into systems to regulate the relatlve humidity of the air as it enters the ESF filter train. Since the on opvratir; fan.ailure, control room air handling units are designed to 4
The electrical equipment area a: 'bc control maintain the control room tempc4ature and humidity room area return exhaust fans start automatically within limits, additional controls ue not necessary for when the air conditioning unit is started. Each fan the ESF filter train, inlet damper is open automatically. The exhaust 9A.1.1.8 Standard Review Plan 6.5.1 Compliance dampers to the conditioning unit are opened Status automatically.
Differential pressure-indicating controllers The control room ESF system complies with SRP modulate dampers in the return air ducts to maintain 6.5.1 Table 6.5.11. The only exceptions are for heater and moisture separator instrumentation requirements.
space positive pressure requhernents.
Since these components are not necessary for the ABWR desiga, no instrumentation has been supplied to monitor their operation, Relative humidity and temperature of the inlet air is maintained by the control room air. handling system.
9.4.1.2 Essential Electrical and Reactor Building Coollag Water Equipment HVAC 9A.1.2.1 Design Basis The cooling unit starts automatically on a signal from the temperature. indicating controller installed (1) The HVAC system is designed with sufficient in the IIVAC room. The controller modulates a redundancy to ensure operation under three-way chiiled water valve to maintain the space emergency conditions assuming the failure of any one active component.
conditions, During winter, the electric unit heaters are cycled (2) The HVAC system is designed to provide a by temperature indicating controller switches, controlled temperature environment to ensure located within the filter rooms and the air. handler the continued operation of safety related equipment under accidett conditions.
rooms.
Tbc supply and return air duct work has manual (3) The HVAC system and components are located balancing dampers provided in the branch ducts for in a Scismic Cate' gory I structure that is balancing purposes. The dampers are locked in tornado missle and flood protected.
place after the system is balanced, Tornado missle barricts provided for intake and A
(4) 3 9 A.1.1.7 Regulatory Guide 1.52 Compliance Status exhaust structures.
The control room ESF filter tialas comply with 9A.1.2.2 Power Generation Design Basis all applicable provisions of Regulatory Guide 1.52, The HVAC system is designed to provide an Section C except as noted buow.
(1) environment with controlled temperature during The revisions of ANSI N509 and NS10 listed in no'rmal operation to ensure the comfort and Table 1.8 21 are used for ABWR ESF fliter train safety of plant personnel and the integrity of the designt the Regulatory Guide references older essential electrical and RCW equipment.
revisions of these standards.
(2) The system is designed to facilitate periodic The control room ESF fliter trains are'in inspection of the principal sprem components.
compliance with the system design criteria except for 9.4 L2 Amendment 17 e*
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s 23A6t0MH MM m-n Standard Plant (3) Design outside air tempe ature for the heat exchanger building HVAC system are 115 F ~
during the summer and 40*F during akter.
9.4.1.2J System Descriptios The essential electrical HVAC system is divided 3l into 3 independent subsystems with each subsystem serving a designated area. Each Subsyuem serve as essential electrical beat exchanger equipment HVAC for divisions A, B, C, ad D.
The contrel building essential eletrical HVAC system flow rates are given in Table 9.4 3 and system component descriptions are given in Table 9.4-4.
9.4.1.23.1 Safety-Related Subsystem 1 Subsystem i specifically serves:
(1) Safety relar'i battery room 1, (2) Essential chiller room A.
RC W (3) ?! :: " ; m:: pump and heat exchanger room A, (4) HVAC equipment room, (5) Safety related electrical equipment room, (6) Passages, (7) Non essential battery rocm, (8) Non essential electrical equipment rooms.
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. Standard Plant Recirculation unit for subsystem 1 consists of a (4) HVAC equipment room, prefilter section, a high efficient filter section,ee.
':"^ ' rr. a cooling coil, and two M@ capacity (5) Safety related electrical equipment room, suoply fans.
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TwoM capacity returu exhaust fans discharge to Recirculation unit for Subsystem : 3 consists of a the atmosphere.
prefilter section, a high efficient filter section,en i L in, a cooling coil, and twoM% capacity 1"
9.4.1.2.3.2 Safety Related Subsystem 2 supply fans.
Subsystem 2 specifically serves:
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TwoN% capacity return exhaust fans discharge (1) Safety related battery rooms 2 and 4, to the atmosphere.
(2) Essential chiller room B, (3) RCW pump wibeat exchanger room B, 9A.1.2A SafetyEvaluation (4) *WAC equipment room, The essential electricalIWAC system is designed to casure the operability of the essential electrical equip-(5) Safety-related electrical equipment room, ment, and to limit the hydrogen concentration to less than 2% by volume in the battery rooms. All n'
(6) Passages, safety related HVAC equipment and surrounding structures are of seismic category I design and 3
(7) g Remote Shutdown PanelRoom.
operable du-ingloss of the offsite power supply, Recirculation unit for Subsystem 2 consists of a The duerwork which scwices these safety functions prefilter section, a high efficient filter scetion,en is termed ESF ductwork, and is of Seismic Category I 9"E
, a cooling coil, and two Mi% capacity design. ESF ducting is high pressure safety grade 1**
ductwork designed to withstand the maximum positive supply fans.
and/or negative pressure to which it can be subjected under normal or abnormal condtions. Galvanized steel ASTM A526 or ASTM A527 is used for outdoor t c.,n Two M% capacity return exhaust fans Cscharge to air intake and exhaust ducts. All other ducts are the atmosphere.
welded black steel ASTM A570, Grade A or Grade -
D. Ductwork and hangers are Seismic Category I.
Bolted Flange and welded joints are qualified per ERDA 76-21.
9A.1.233 Safety-Related Subsystem 3 Redundant components are provided where neces-Subsystem 3 speciScally serves:
sary to ensure that a aingle failure will not preclude adequate heath =t building ventilation.
(1) Safety-related battery room 3, 9A.1.2.5 laspectica and Testing Requirements
_(2) Essential chiller room C, Provisions are made for periodic tests of the out-(3) RCW water pump and heat whwger room C, door air cleanup fans and filters. These tests include determinations of differential pressure across the filter and of filter efGeiency. Connections for testing, such as injection, sampling and monitoring are v.'p-H-I A Amendment 17
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The balance of the system is proven operable by its use du.Lg r.ctma' ;.Lnt operatic. Portions of the system normally closed to flow can be t;.sted to ensure operability and integnty of the system.
9A.1.2.6 lastrurantatloa Application The area exhaust fans are started manually and the fas discharge the air to atmosphere, murt (O
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A temperature indicating controller senses the temperature of the air ! caving the air cleanup s>uem.
The controller then modulates an electric heating coil to maintain the leaving air temperature at a preset limit. A limit switch will cause an alarm to be actuated on high air temperature, i
l The essential electrical return exhaust fans start automatically when the air conditioning unit is started. Each f an inlet damper is open automatically. The exhaust dampers are closed automatically and the return air dampers to the conditioning unit are opened automatically.
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The chiller room cooling unit starts automatically l
on a signal from the temperature. indicating control-let installed in the chiller room. The controller mod.
ilates a three.way chilled water valve to maintain the space conditions.
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v.ay I.5 12 12: 40Pt1 G E tUCLEAR ELDG J 23Ad100AH n, n Standard Plant 9.4.2 Spent Fuel Pool Area Ventilation high potential radioactivity. The TBVS desip is based on supplying air from the turbine building System periphery (outer walls) both above and below the operating Door and ventilating areas radially The spent fuel pool area ventiladon system is put i:meds towards the return / exhaust air inlet of the retetor building ventilation systen..L
..d points located below the operating floor in in Subsecdon 9.4.5.
equipment rooms, the condenser area and under the building roof. The main stairwells that we 9.4.3 Auxillary Ares Ventilation System drsigned for personnel evacuaticu routes are De saillary area ventilation system is part of the pressurized to prevent infiltration of smoke from other turbine building areas, during a fire reactor building ventilation system described in Sub.
situation.
section 9.4.5.
9.4.4 Tur'oine Island Ventilation System (4) *ne TBVS is designed to minimize exfiltration by maintaining a slightly negative pressure by -
TL turb'ac island ventilation system consists of exhausting 10% more air than is supplied to the turbine building.
the turbine building ventilation system (TBVS) and l
the electncal building ventilation system (EBVS).
contamination turbine building areas or 9.4.4.1 Design Bases component vents is collected, filtered and discharged to the attoosphere through the 9A.4.1.1 Safety Dealga Bases turbine building compartment exhaust (TBCE)
The TBVS and EBVS do not serve or support any system.
safety function and have no safety design bases.
Exhaust air from other (low potential altborne (6) coatar_!viin. :urbine building areas and 9AA.1.2 Powtr Generadon Design Bases componen. vents, except tube oil areas, is either exhausted to the atmosphere through a medium (1) The TBVS and EDV5 are designed to supply efficicacy filter or,is returned to the supply air filtered and tempered air to all turbine island unit and mixed with outside air.
spaces during all modes of norrnal plant operation, including plant startup and Exhaust air from the lube oil areas is exhausted shutdowo. The systems are also designed to
('T) maintain inside air ternperatures above 60*F to the atmosphere without filtration.
s and below the following upper design limits:
All turbine building exhaust air is directed to the (6)
. GeneralTurbine Building Areas:
104*F plant vent stack where it is monitored for 110*F radiation prior to being discharged to the
. Condenser Compartment:
. Resia Tank Room:
110*F atmosphere.
. Stcam Tunneh 120 F
. Moisture Separator Compartments: 120*F (9) Upon high radiation alarm from the plant vent 104*F stack radiaden monitoring system, the operator Electrical Building Arc.as:
will shutdown the pinut, investigate and take correedve action.
(2) The EBVS is designed to provide independent supply and exhaust ventilation to the electneal (10) The TBVS is designed to provide for local air switchgear, chillers and air compressor rooms,.
recirculadon and cooling in high heat load areas and independent exhaust for the gas turbine -
usinglocal unit coolers. A trinimum of 509 -
generator and boiler rooms. The ventilation standby cooling capacity is provided in areas exhaust for these areas is discharged direedy to where a loss of cooling would interfere with atmosphere. Recirculation from clean areas is piant power generation objectives.
provided for as appropriate.
(3) The TBVS is designed to direct air flow < rom areas oflow potential radioactivity to areas of 9.62 Amcadaient t6 4g g
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the energy used for either cooling by the chilled water -
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' 9.4.4.2 Descripties system or heating by the aumliary boiler system; l 9.4AJJ TRY5 General Desertption On extreme outside air temperature conditions 3
The TBVS air flow diagram is shows on Figure ~
(either high er b), th evuide air iitske dampers l
-t 9A-2a; the system lastruments and controls are are at their minimusa position. Maximum inside air, illustrated oli Figure 9.4 2b; equipment design as available from the building cleaa and low potential f j
3 airbores aa=*e=3=ation areas only, is recirculated by-parameters are listed la Table 9.4 5.
the TBVS exhaust /retura fans to the supply air inter The turbine building supply air units, mais eshaust pissam.-
fans, equipment compartment exhaust fans, filters, ~
The TBS fans are started by handswitebes located and control panels are located la the HVAC on local controf panels,- The supply fans are equipment rooms at elevatlos T.M.S.lJ0.3m, and the floor above. The lobe oil area exhaust fans are
- laterlocked with the TBVS exhaust fans and TBVS i
located la the vicielty of lobe oil ruervoir room.
compartment exhaust fans to ensure that the exhaust
- IndMdual unit coolers and unit heaters are located fans are running before a supply fan is started.
in the areas that they serve.
The TBS air handling huting and cooling coil-Potentially high contamination sahaust air is _ lways -
operating duties are modulated by temperature a
j discharged to the atmosphere.- Exhaust air form controllers located at the coils air outlet.
clean and low potential irborne contamisation areas ne TBS fans are started by handswitebes located.
i-s either discharged to atmosphere or recirculated, on alocal controlpanel.
All turbiac building ventilation systems and subsystems that are required to sustain normal plant 9A.42.12 Turbios Bulldlag E4haust (TBE) System I
operation are provided with redundant fans on The air drawn by TDE fans from the building clean automatic standby.
and low potential contaalaation areas is filtered 9AAJ.1J Tur6tme Seildlag Sepply (TBS) System through medium efficiency particulate filters (bag -
j type) and either exhaosted through the monitored The TBS system consists of outside air intake vent stack or returned to the TBVS supply pienum to louvers; return and cabaust air modulating dampers mix with outside air. -
l with minimum outside air damper position; low and The TBE system is provided with three 50%.
I high efficiency filters; hot water heating coil; chilled _ capacity fans downstream of t water cooling coils, and three 50% capacity coastant
' arc normally is operation and one is on automatic volume supply fans.
standby.
A filter bypass la provided to allow smoke purgi su cred if eq l
ir to alllevels of the turbine building. The third fan from turbine b&mg,in case Mo M h l
Is a standby unit, which starts automatically upon fans can be operated simu usly to provide a
failure of either operating fan. Each supply fas is maximum smoks temoval,is i
h Provided with pneumatically operated inlet vases, TBVS cahaust fans are provided with inlet r ed a t
s.
vanes ad AP the h of A TBS ruas with lots ocaside air durag mannal operating fans to main al des ed negative plant operation whenever outside air temperature is -
pressu i to moderate enough to contribute to ma aiming U
ad assocated controls.- The TBVS exhaust fans._
-i a e interlocked with the TBVS supply fans, as noted o ratin cos T e TB m ulate t re ur.
i exhaust and outside air dampers to maximize inside earher.
I air temperature control by outside air, and m, umn, e g
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wa Standard Plant 9AA.2.IJ Turblae Building Compartment Exhaust exchanger areas, condensate control station, RFP power supply room, deminersliter room and (TBCE) Systema filtermaintenance arca, TCW pump area, SJAE and The TBCE system consists of two 100%
recombiner rooms, upper level above the turbine capacity cabaust fans, one common medium operating floor. The unit coolers are supplied with chilled water from the chilled water system.
e.fiiciency f;1ter at end r.ociated controls. One fan is normally in. operation, and the ether one on Temperatura controls for the unit coolers and automatic standby. The sptem also includes a 100%
electric unit bearers are located in the unit inlet air
- c. par!ty filter bypass duct for purging smoke in case pas orinstalled nearby.
of fire.
Except when smoke removal is required, air exhausted from the building high potential airborne 9AA.2.2 EBVS General Description contamination compartments and equipment vents is The EBVS achematic disgram is shown on filtered through a medium efficiencytilter (bag type) before it is released to the atmosphere through th; Figure 9A-2c.
plant vent stack.
9AA.2.2.1 Electrical Building Ventilation System The two exhaust fans are provided with inlet The electrical building ventilation system is vanca and isolation dampers. An alt flow controller provided with two 100% capacity air supply fans and s.utomaticaDy adjusts the inlet vanes of the operating fan to maintain a constant system exhaust at flow two 100% capacity exhaust fans.
rate. In the automatic mode, loss of flow from the The ventilation air supply draws outside air operating fan starts the standby fan and associated through air louvers, control dampers, low efficiency controls.
filters, and chilled water coils, and discharges directly 9AA.2.1A Turbine Building Lube Oil Area Exhaust into the switchgear, chiller, gas turbine generator, auxiliary boiler and air compressor rooms. Ductwork (TDLOE) Sptem and bypass dampers are provided to allow The TULOE system includes two 100%
recirculation of ventilation air from the switchgear and chi!!er rooms.
capacity fans, isolation dampers and exhaust ductwork. The TELOE fans discharge the exhaust The ventilation exhaust system exhausts air directly air directly to the atmosphere through the plant vent to atmosphere through shutoff dampers and outside stack. One fan is designed to continuously exhaust at a constant volumetric flow rate from the tube oil
- louvers, process and storage rooms and rooms having 9AA.2.2.2 EBVS Unit coolers and Electric Unit electro. hydraulic fluids. Supply air to these rooms in delivered by the TBVS supply fans. A bypass duct la Hasters i
provided around the lube oil exhaust fans for pur6 ag Locahzed unit coolers and/or electrie unit beaters high temperature combustion products and limiting are provided as required in the chiller, air compressor room pressurization in case of fire in one of the and gas turbine generator rooms. The unit coolers are supplied with chilled water from the chilled water
- rooms, 9AA.2.1.5 TBVS Unit Coolers and Electric Unit system.
Heaters Temperature controls for the unit coolers and elec.
tric unit heaters are located in the unit inlet air path '
Localized unit coolers and ele:tric unit heaters are provided as required in the following rooms:
or insta!Ied nearby.
condenser compartments, condensate pump room, heater drain pump rooms, filter valve room, demineralizer pump and valve rooms TCW heat 944b
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Standard Plant Controls and lastrumentation for the TBVS and 9AAJ Evatension E8vs includes:
j The TBS and EBVS have no safety design bases (1) heating and cooling temperature indicators and I
and serve no safety function..
controls for the entering mixed air and
' The TBVS is designed to maatsin air hwa from recirculated air; l
l low airborne ra aardvity potential areas to arus of locallow and high temperature switches and l
m higher potential radioactivity. Ventilation system (2) alarms for heated and cooled air supply with releases are monitored at the plaat vent in summary panel trouble alarm to the control l
compliance with GDC 60 and 64. Where a system is l.
provided with a redundant fan, ' allure of as room computer; operating fan automaticaDy starts the standby fan to differential pressere indicators, differestial l
mal =#aie camalanley of vaaritasta=
(3) pressure switches, and high alarm for the air I
- Akers, The cahaust air from the TBVS_is monitored for -
2 radioactivity prior to disebarge to the plant vent. -
(4). air flow indicator and control for each supply Upon detection of high radiation, alarms are annunciated locally and in the main control room.
Ian;and Refer to Section 11.5 for a description of the air flow failure switch and alarm for each ex.
l radiologicalmonitoring system.
(5) haust fan, with summary panel trouble alarm to l
Evaluation of the TBVS and EBVS with respect to the controi rcom computer..
l fire protealca is f-d in Subsection 9.5.1.
1 9AAA Testa sad laspecticas -
All major components are tested and inspected as separate components prior to installation, and as in.
tegrated systems after installation, to ensure design performance. Ductwork system air flows are mes-sured and adjusted to meet design requirements within + /.10%, and all instruments are calibrated to a
the design setpoints. The systems-are preoperationally tested in accordance with require-ments of Chapter 14.
Periodie inspections and measurements include air flows, water flows, air and water temperatures, fiker
- pressure drops, controls positions, to verify the systems condition, and ensure operability and integrity of the systems for normal plant operation.
9AA.5 Inesrumentation Appikation -
i' All control actuations, indicators, and alarms for normal plant operation are located in local controf panels in the TBVS and EBVS equipment areas.-
l
. Any one or more alarms at a local co trol panel will be retransmitted to the main control room as a single alarm.
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