ML20045D506

Forwards Ssar Markups Resulting from Ge/Nrc 930623 Plant Sys Branch Telcon,Including Chapters 6,9 & 11

ML20045D506
Person / Time
Site:	05200001
Issue date:	06/23/1993
From:	Fox J GENERAL ELECTRIC CO.
To:	Poslusny C Office of Nuclear Reactor Regulation
References
NUDOCS 9306290078
Download: ML20045D506 (13)

Text

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GENuclear Energy.

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CeneratCecu:c Compart 175 Cwinn Avenue.Sanhse.CA 95125 .

June 23,1993 - Docket No. STN 52-001 1 7 1 1 ';

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v Che.t Poslusny, Senior Project Manager) f Standardization Project _ Directorate ..

4 1 1 Associate Directorate for Advanced Reactors!

and License Renewal - _._

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Office of the Nuclear Reactor Regulationi 4 Subjcct: - Submittal Supporti ng Accelerated ABWR Schedulh- Plant Systems Branch -

Information - ' .,

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Dear Chet:

Enclosed are the SSAR markups resulting from the GE/NRC Plant" Systems Branch" conference .

call of June 23,1993. This includes Chapters 6,9 and 11.' H g

Please provide a copy of this transmittal to Chandra.

Sincerely,-

Yrf' Jack Fox Advanced Reactor Programs cc: ' Alan Beard (GE)

- Gary Ehlert (GE) -

Norman Fletcher (DOEY Morry Munson (GE) ~

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. Nabe Totah (GE):

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Table 6.4-2 CONTROL ROOM HEATING, VENTILATING AND i AIR-CONDITIONING SYSTEM FAILURE ANALYSIS Component . Malfunction Comments Air-conditioning supply or Failure of a fan resulting in loss. Should an operating fan fail, the return fan of duct pressure resultant loss of duct pressure-actuates an alarm, and transfers-operation to the standby fan; Fans are powered from enginected safety features buses.-

Chiller - Failure of a chiller resultingin Following the loss of.a chiller, loss of cooling capacity air temperature on discharge of >

a/c unit fan increases and ~

actuates a high temperature alarm in the- control room. The defective unit would be manually

. shut down, and the standby air-conditioning unit started.

Chillers are powered from the '

engineered safety features buses.

Control building Failure resulting in high pressure High pressure differential across air-conditioning filtration differential across filter train filter train will actuate alarm system in control room. Defective filter would be manually isolated and standby system brought into service.

Outside air supplyintake Failure resultingin loss of Two redundant and separate outside air supply outside air supply sources have been provided. j Voo r. l Radiation monitor in Failure resulting in loss of -T-wee radiatioo monitors are  !

outside air supply duct . radiation-monitoring capability - provided in paralle1. ]

Smoke detector Failurc or loss in fire detection A minimum of two detectors capability located in each safety-related area.

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Standard Plant au a O '9AJJ.2 System Description 4 plant operations.

The non-essential HVAC system consists ofk fa'n 9A.53A Inspection 1 coil units. ca u;w.u .+ =g _

The system is designed to permit periodic mspec-1 w ;! e;;; o f.: r r: fry r d. .... The following rooms are cooled by non-essential HVAC: tion ofimportant components, such as fans, motors, l 4 belts, coils, and valves, to assure the integrity and ca- .

l (1) PCV L/T Measurement Room pability of the system.  !

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1 (2) ISI Room (A) 9A.53.5 Instrumentation Application j (3) ISI Room (B) The non-essential equipment HVAC system starts manually.-

(4) Plant Outage Workers Room M.<.h m t <~en+r* I som REdn3 9A.S.4 Essential Electrical Equipment HVAC (5) CRD Auto Exchanger Control Panel Room (A) System (6) CRD Auto Exchanger Control Panel Room (B) 9A.5A.1 Design Bases

- (') "J_;;= ". 9:^: Coauvi s o..J R v.u(A) 9A.5A.1.1 Safety Design Bases 4

-(S) n;r ;.u ".us idada c OW pu neem (ft)--- . The essential electrical equipment HVAC system is designed to provide controlled temperature envi-

- (9) n..b' .d 'a? ' Ov W Le.u - ronment to ensure the continued operation of safety ,

related equipment under accident conditions. , The .j

These rooms are cooled by the secondary contain- rooms cooled by the essential electrical equipment +

ment HVAC system during normal conditions.The HVAC system are maintained at positive pressure wd

units are open ended and continuously recirculate - relative to atmosphere during normal and accident y.p[

cooling air within the space served. Space heat is re- conditions. This is achieved by sizing intake fans Dw(

moved by cooling water passing through the coil sec- larger than exhaust fans, dj $

tion. HVAC normal cooling water is the cooling {vs0d

, medium. The units are fed from the nondivisional The power supplies to the ventilation systems for m the essential electrical equipment rooms allow unin- d power source. Space temperature is maintained as specified in Appendix 31. Humidity is not specifically maintained at a set range, but is automatically deter-terrupted operation in the event ofloss of normal offsite power.

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4 mined by the surface temperature of the cooling coil. $ d. i i

i Drain pan discharge (condensate) is routed to a The system and components are located in a Seis. ~U

" { $ '

drain sump located within the room. mic Category I structure that are tornado-missile and +d 5 #~d 9.4.533 Safety Evaluation flood protected, including tornado missle barriers on intake and exhaust structures. D $j,!

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u vb' Operation of the non essential equipment HVAC For compliance with code standards and regulatory vin Ij-$f.l, 2 system is not a prerequisite to assurance of either of guides, see Sections 3.2 and 1.8.

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l On a smoke alarm in a division of the reactor bj 6 g (1) Integrity of the reactor coolant pressure bound- building essential electrical HVAC system, that gi ary, or division of HVAC shall be put into smoke removal a{ g ,y W

mode. No_other division is effected by this action.

For smoke removal, the recirculation duct valve is d (2) capability to safely shut down the reactor and to Jd f _o [l l

maintain a safe shutdown condition, closed, the fan bypass valve opened, and the exhaust '

fan is stopped.

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that provide reliability over the full range of normal 9AJA.1.2 Power Generation Design Bases Q

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!~ to the diesel generators. The exhaust air is forced 9A34.2 System Description -l i out the exhaust louvers.

The_ containment purge supply / exhaust system t-K i 9AJJJ SafetyEvaluation consists of the purge supply fan, a'HEPA filter, a ; .i purge exhaust fan, ductwork,'and controls. The '

i The diesel generator rooms are designed to the re < . containment purge supply / exhaust system PAID is '

- quirements specified in Section 3.2. The systems are 'shown in Figure 9.4 3.

connected to their corresponding division Class IE :

j bus and are operable after loss of offsite power ;The purge system, when in use and if the ' air is not :

rsdioactive, discharges to the secondary containment -

[ supply.

' Uh .O HVAC system for filtering and exhausting out thel l The intake louvers are locat'ed ath(37.7ft, plant stack. -If the air is radioactive it is discharged '

j above grade and exhaust louvers are at 20ft) through the SGTS systemc During refueling, the air

above grade. (See general arrangement rawing,

: purge rate should be up to 3 times the containment ,

j' Figure 1.211 and 1.212). free volume. j

! 9A.53A Tests and Inspection The containment purge supply / exhaust system takes -

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' its air supply from the secondary containment HVAC : j l

The ventilation systems are periodically tested to'- system supply. (See Figure 9.4-3). j

-assure availability upon demand. Equipment layout provides easy access for inspection and testing. .  : 9A.543 Safety Evaluation i .. . i 4 9AJJJ Instrumentation Application Operation of the' containment purge supply /. l exhaust system is not required to assure either of the '

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i The ventilation system is interlocked with the. ~ followingconditions:. . , _

diesel generator starting system with which it serves.' . . ..

.. l (1) Integrity of the reactor coolant pressure bound- ,.

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Remote manual override are provided from the (2) capability to safely shut down the reactor and to.

manual control room is provided so that fans can be maintain a safe shutdown ' condition.-

started or stopped at any time. .

-. However, the system does incorporate features that .

9A.5.6 Containment Supply / Exhaust System provide reliability over the full range of normal plant operations.

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9AJ4.1 Design Bases '

- 9AJ4A Inspection and Testing Requirements ?

9AJ4.1.1 Safety Design Bases ,

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, The containment purge supply / exhaust system is ,

i' The containment purge supply / exhaust system has . designed to facilitate implementation of a program of no safety related function as defined in Section 3.2. - periodic inspection to assure proper function and reli--

Failure of the system does not' compromise'any. ' ability of all equipment and controls. -~

safety related component and does not prevent safe 5

reactor shutdown. Provisions are incorporated 101 9AJ4.5 Instamentation ,

minimize release of radioactive substances to atmo- <

e sphere. A radiation' monitoring system is provided to detect

high radiation in the containment purge exhaust.: A'-

9AJ4.1.2 Power Generation Design Bases ? high-radiation signal actuates an alarm and close's' the j isolation valve in the exhaust ducts..The SGTS can be

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-The containment purge supply / exhaust system ' i then be' started. -

shall be capable of supplying filtered. air to the :

atmospheric control system (ACS), and exhausting.

4 air from the ACS system out the plant vent stack.

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• 9A17 Malmsteam/FeedwaterTunnel HVAC' is inspected periodically to usure that all o'perating . j '

' Systeam equipment and controls are functioning properly.-

Standby components are periodically tested to ensure '

9A17.1 Design Bases that the standby equipment is operational.--

I, 9A17.1.1 Safety Design Bases 9A17J Instamentation Application-The mainsteam/feedwater tunnel HVAC system The mainsteam/feedwater tunnel HVAC system.

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! has no safety related function as defined in Section , i starts manually. A flow switch installed in the operat 1 _

3.2. Failure of the system does not compromise any- ing fan discharge ductwork automatically starts the safety-related component and does not prevent safe . standby fan on indication of operating fan failure.

l' reactor shutdown. Provisions are incorporated to i minimize rclease of radioactive substances to atmo- ' 9A18 P-*= Internal Pump Control Panel Rooma l sphere and to prevent operator exposure. .

. 9A.5A1 Design Bases J l 9A17.1.2 Power Generation Design Bases ..

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9A1811 Safety Design Bases ';

i . The mainsteam/feedwater tunnel HVAC system is - . .

.The reactor laternal pump control panel room

' temperature designed and to provide an environment airflow patterns to ensure both the" with controlled.. .HVAC system has no safety-related func i comfort and safety of plant personnel and the integ- fined in Section 3.2. Failure of the system does not-i rity of equipment and components. compromise any safety-related or component and does - ~

i ~ not prevent" safe reactor shutdown.

1' f 9A17.2 System Descriptica . . .

9A.511.2 Power Generstlos Design Bases 4 See Figure 9.4-3 for the P&ID of the l' F mainsteam/feedwater tunnel HVAC system.LThe . The reactor internal pump control panel room -

i HVAC system is a closed system. Two fan coil units ' ' HVAC system is designed to provide an environment 4- provide cooling to the' steam tunnel.' Each fan coil L with controlled temperature and humidity to insure i unit consists of a cooling coil, and two fans. One fan - . both the' comfort and safety of plant personnel and the ,

a is normally operating, with one on standby. The fan _ integrity of. equipment and compon ats.L

'- furnishes cooled air through ductwork and registers -

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to various locations within the steamtunnel 9A.512 Systens Descripaloe : _

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9A17.3 SafetyEvaluation- Divisions 1 and 2 reactor internal pump control- 1 ll ~

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' panel room HVAC systems are identical. The HVAC.

.l Operation of the mainsteam/feedwater tunnel system for each division of the reactor internal pump i

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, - HVAC system is not a prerequisite to asssrance of control panel room consists of two supply fans, and a :

, either of the following: cooling /99 7 See Figure 9A-5 for the system i P&ID. The reactor internal pump panel room HVAC  :?

(1) integrity of the reactor coolant pressure bound- ~ system flow rates are shown in Table 9.4 3, and the 1- ary,or system component descriptions are given in Table -

9.4-4.

j (2) capability to safely shutdown the reactor and to . . .. . .

j maintain a safe shutdown condition. 9AJA3 SafetyEvaluation p

However, the systen, does incorporate features that Operation of the reactor internal pump control panel -

provide reliability over the full range of normal plant '

room HVAC system is not a prerequisite to assurance 1 '

operation. . of either of the following:

! - 9A17A - Inspection and Testing Requiressents 1(1) Integrity of the reactor coolant pressure -

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The mainsteam/feedwater tunnel HVAC system i ~ fis

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3 9.4.6 Radwaste Building HVAC System system. _ The air conditioning system is a unit :i l - air-conditioner consisting of a water-cooled condenser, .

j 9.4.6.1 Design Bases compressor, cooling coil, heating coil, filters and fan.

Outdoor air and recirculating air are mixed and drawn H i

9.4.6.1.1. Safety Design _ Bases l through a prefilter, a_ heating coil, a cooling coil, and-- l I

two 100% supply fans. One fan is normally operating -

The radwaste building HVAC system has no_ and the other fan is anatandhy. A pressure differential j safety related function as defined in Section 3.2. controller regulates the exfiltration from the~ control .

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i Failure of the system does not compromise any . room to maintain it at a positive static pressure, '

safety-related system or component and does not preventing airborne contaminatian from entering.R l ~ '

'i i prevent safe reactor shutdown Provisions are incorporated to minimize release of radioactive 5- - - '- " i m

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% i substances to atmosphere and to prevent operator exposure. The radwaste building HVAC P&ID is

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• l shown in Figure 9.410.' - - ' ^_ .11 k - ' % L ' : * ^ ^ =. % -

j - .- .u ... . -Si i 9A.6.1.2 Power Generation Design Bases . . .

9A.6.2.2 Radweste Bnildlag HVAC Control System . 4 l 1 1 The radwaste building ventilation system is 4

designed to provide an environment with ' controlled ' He HVAC control system for the remainder of the . j temperature and airflow patterns to insure both the radwaste buildingis a once-through type. Outdoor air = ,

! comfort and safety of plant personnel and the is filtered, tempered and delivered to'the integrity of equipment and components. The

' nanmntaminatad areas of the building. The supply air j

radwaste building is divided into two zones for air; system mnaints of a prefilter, heating coil, cooling coi*c

conditioning and ventilation purposes. These zones and two 100% supply fans. - One fan is normally - l operating and the other fan is on'atandhy. The supply j

are the radwaste control room and the balance of the ~

, radwaste building. - 3 fan furnishes conditioned air through ductwork and -  :

diffusers,~ or registers to the work areas of the budding.

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A positive static pressure w*th respect to the~ Zone preheat coils installad in the supply air ductwork

balance of the building and to atmosphere is provide temperature control Air from the work areas maintained in the radwaste control room. The L is exhausted through the tank and pump rooms 1Thus, balance of the radwaste building is maintained at a - the overall airflow pattern is from the least potentially .

, negative static pressure with respect to atmosphere. mataminated areas to themost mataminated areas.-

y i The system design is based ~on outdoor summer = ne exhaust air system consists of two 100% exhaust ;  ;

maximum pf 115 F. Summer indoor temperatures fans, one normally operating and one on standby.

include 75"F in the radweste control station,90 F in' Exhaust air from the silo, waste filter' rooms, oil "

operating areas gnd corridors, a maximum separator room and the mixing and filling station is l temperature of 104"F in areas that may be occupied monitored for airborne radioactivity._ _Under normal _'

and 110 F in the equipment ceils. Winter indoor conditions with no contamination, normal ventilation ;

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in the same circuit as the other spaces in the building is .

degign temperaturesinclude 60 F in occupied areas, 70 F in the radwaste control room and 60 F in the . fmaintained.)Each of the above;noted spaces is equipment' cellsj based on 'an outdoor design - separately monitored. JA high level of radioactivity temperature of-40 F.

~

' activates an alarm in the main control' room, L simultaneously l Isolating the effected space. The 9A.6.2 System Description : . exhaust air is exhausted through the mais plant stack.

9A.6.2.1: Radwaste Building Control Room

' Heating, cooling and pressurization of the control:

l room are accomplished by an air conditioningT

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Table 9.4-3 HVAC FLOW RATES .

(Response to Question 430.243) '

Essential HVAC System Mew Rates

-(cah)

R'l Electrical HVAC Division A 30,000 ,

RB Electrical HVAC Divisim B 30,000 RB Electrical HVACI%sion C 30,000 DG HVAC Division A -160,000 -

DG HVAC Division B 160,000 DG HVAC Division C 160,000 CB Electrical HVAC Division A.' 35,000 CB Electrical HVAC Division B . 35,000-CB Electrical HVAC Division C : 35,000 MCR HVAC Division B - 80,000 .

MCR HVAC Division C ~ 80,000 Non-Essential HVAC Systems Mow Rate

-(cab)

RB Secondary Containment HVAC 170,000 '

TB Ventilation System ' 341,500 -

RIP Panel Room HVAC Division A '57,500 -

RIP Panel Room HVAC Division B 57,500 RocIwasde. BuiId.,ig Hypc w.

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A Table 9.4-4 HVAC SYSTEM COMPONENT DESCRIPTIONS (Continued) ,  !

(Response to Question 430.243)- ]

1 l

! ESSENTIAI, EQUIPMENT LIST ~

Essential Air Conditioners Capacity (Btu /hr)

HPCS Pump Room'AC Div B 436,500 HPCS Pump Room AC Div C 436,500 RHR Pump Room AC Div A .291,700 RHR Pump Room AC Div B 291,700 RHR Pump Room AC Div C 291,700

]

RCIC Pump Room AC Div A 65,500 FCS Room AC Div B 52,000 FCS Room AC Div C 52,000 FPC Pump Room AC Div A 27,000 FPC Pump Room AC Div B 27,000 I CAMS Room AC Div A 79,400 CAMS Room AC Div B . 79,400 SGTS Room AC Div A 16,000 j SGTS Room AC Div B 16,000 -

1 NON-ESSENTIALEQUIPMENTLIST(#oh i)

Heating / Cooling Colts Quantity Cooling . Heating -

(Btu /hr) (Btu /hr)

P RB Secondary Containment HVAC 1 on standby) 6,100,000 9,100,000 RIP Panel Room HVAC Division A 1 .2,000,000 ^=,0^,^,

., A RIP Panel Room HVAC Division B 1 2,000,000 47^^,^^ .

Fans Quantity - Capacity (cmh)

RB Secondary RB Secondary Containment Containment Exhaust Fans f 1 Intake on standby)Fans 57,500 /j(l on standby) 57,500 '

Purge Air Exhaust Fan y 1 22,000 RIP Panel Room Division A Fans 2 (1 on standby) 50,000 RIP Panel Room Division B Fans . 2 (1 on standby) 50,000 i

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i Standard Plant Rev. B Table 9.4-4 HVAC SYSTEM COMPONENT DESCRIPTIONS (Continued)

(Response to Question 430.243)

NON - ESSENTIAL EQUIPMENT LIST ( tVofec f)

! Filters Quantity , Capacity

[4 (cmh)

RB Secondary Containment HVAC [(1 per fan) 57,500

Purge Air Intake HEPA Filter ;g i 22,000 RIP HVAC Division A 1 50,000 i RIP HVAC Division B 1 50,000-4 Non Essential Air Conditioners Quantity Capacity (Btu /hr)

Mainsteam Tunnel AC 2= 595,000 Refueling Machine Control Room AC .1 79,400 -

ISI Room AC 1 51,600 -

MG Set Room AC 2 993,000 CB Non-essential Electric Room AC 1 200,000 Wade s ',

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9 I a i i a i i I 5 1 a da u d u d _, w av v dd 1 av g g>- .-s K4 g> -gg E.3 57 ve Wei we ra. WB WB Figure 9.4-6 ESSENTIAL DIESEL GENERATOR HAVC SYSTEM Ame ment 22 ' 9.4-73

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. Standard Plant nev n 11.5.2.2.4 Plant Stack Discharge Radiation The radiation monitor initiates trips for Monitoring alarm indications on high high, high, and low /

radiation from each detector assembly. Also, k This subsystem monitors the stack vent the sampled line is monitored for high or low discharge for gross radiation level during normal flow indications and alarming.-

plant operation and collects halogen and particulate samples for laboratory analysis. The Table 11.5-2 presents the gaseous and discharge through this common plant vent includes airborne monitors for the effluent radiation HVAC exhausts

• from the ---- '"- monitoring system, cd=: : d ::- !:- M!!?bp. Also, this 4urbme system utilizes a high range that measures fission products in plant gaseous effluents during and following an accident.

radiation huilchog Codu)csste bu monitor \ s butIdtn3 cordToled MSR.

A representative sample is continuously extracted from the ventilation ducting through an isokinetic probe in accordance with ANSI N13.1 and passed through the stack ventilation sample panels for monitoring and sampling, and returned to the ventilation ducting. Each sample panel has a pair of filters (one for particulate collection '

and one for halogen' collection ) in parallel (with respect to flow) for continuous gaseous radiation sampling. The radiation detector assembly consists of a shielded gas chamber that 11.5.2.2.5 3'adwnste Liqu!d Discharge Radiation houses a scintillation detector, and a check Monitoring source. The extended range detector assembly ,

consists of an ionization chamber which measure This subsystem continuously monitors the radiation ieveIs up to 10 #Ci/cc. A 5

radioactivity in the radwaste liquid during its ('

radiation monitor in the main control room discharge to the environment and stops the analyzes and visually displays the measured discharge on high radiation level.

radiation level. These sensors are qualified to operate under accident conditions. Liquid waste can be discharged from the sample tanks containing liquids that have been The gas shielded chambers can be purged with processed through one or more treatment systems room air from the control room. The gas chamber such as evaporation, filtration, and ion ,

is equipped with a check source to test detector exchange. During to discharge, the liquid.is l response to background radiation, thus checking extracted from the liquid-drain treatment operability of the radiation channel, process pipe, passed through a liquid sample panel which contains a detection assembly for Power is supplied from 120 Vac local bus for gross radiation monitoring, and returned to the the radiation monitor and for the sample panel. process pipe. The detection assembly consists of a scintillation detector mounted in a shielded sample chamber equipped with a check source. A radiation monitor in the control room

• Nhe reactor building essential electrical analyzes and visually displays the measured  :

, H , diesel generator HVAC, main control gross radiation level. l room AC and the elecrical building l Gtatim i,tems contain no radioactive The sample panel chamber and lines can be I systems. The releases to the environs drained to allow assessment of background 6 -

by these systems uld first have to be buildup. The panel measures and indicates fj [ brought into the bus igs by their own sample line flow. A check source operated from

.i d  ;-' supply fans. Hence, mons ing of these the control room is used to -heck operability of .

exhausts are not required or p (ded. the channel. i

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f The rotetor building creantial clsctrical HVAC, diosal gznarstor HVAC, m2in control room hsbitcbility HVAC, carvics building clean aroc sxhzu t,-cnd the

' electrical building ventilation systems contain no radioactive systems. The only releases to the environs by these systems would first_have to be brought into the buildings by their own supply fans. Hence, monitoring of these exhausts are not required or provided.

The control building essential electrical HVAC contain no radioactive system except for the reactor building cooling water system. The reactor building cooling water system is considered a clean system with monitoring to alarm 1 at any radiation level.above background from potential leakage sources. Such contamination would require dumping of the cooling water to radwaste and replacing the dumped water with clean water therefore maintaining the cleanliness of the system. In addition the system operates at temperatures below 35'C. At this temperature potential for airborne contamination is negligible and any releases other than a vanishingly'small fraction of 10CFR20 concentration limits are not; expected.

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