ML20214S809

Notifies of Proposed Deletion of Nonessential Portions of Electrical Penetration Filter & Exhaust Sys Described in FSAR Section 9.4.5.Comments Requested by 870615.Diagram of Sys & Applicable marked-up FSAR Pages Encl

ML20214S809
Person / Time
Site:	Vogtle
Issue date:	06/01/1987
From:	Bailey J GEORGIA POWER CO.
To:	NRC OFFICE OF ADMINISTRATION & RESOURCES MANAGEMENT (ARM)
References
GN-1374, NUDOCS 8706090433
Download: ML20214S809 (11)

Text

r' Southem Compey Services, Inc.

Post Offc] Bon 282 Waynest:oro, Georgia CD83o Telephone 404 7221543 404 722-8943 Vogtle Project June 1, 1987 U. S. Nuclear Regulatory Commission File:

X7BC35 Attn: Document Control Desk Log:

GN-1374 Washington, D.C.

20555 NRC DOCKET NUMBER 50-425 CONSTRUCTION PERMIT NUMBER CPPR-109 V0GTLE ELECTRIC GENERATING PLANT - UNIT 2 ELECTRICAL PENETRATION FILTER AND EXHAUST SYSTEM Gentlemen:

The Vogtle Electric Generating Plant (VEGP) FSAR Section 9.4.5 describes the electrical penetration area filter and exhaust system as safety-related but as a non-engineered safety feature (ESF) system.

It has no power generation design bases and normal ventilation of the penetration areas is accomplished by the Control Building normal HVAC system.

The normal HVAC systems (non-ESF systems) provided for the Control Building serve no safety function.

The failure of non-safety, non-seismic HVAC equipment /ductwork will not compromise any safety-related systems, structures, or components.

The electrical penetration area filter and exhaust system has no cooling function and is not relied upon to maintain the operating environment (temperature, pressure, humidity) for emergency operation of equipment located in rooms served by the system.

The operating environment for the emergency operation of the safety-related equipment in the Control Building is maintained by the Engineered Safety Feature (ESF) systems described in the VEGP FSAR Paragraphs 9.4.5.1.1.1 and 9.4.5.1.1.2.

In addition, no credit has been taken for the electrical penetration a rea filter and exhaust system in the of f-si te or Control Room post-accident dose calculations.

Deletion of the system will have no impact on the existing dose analyses and will have negligible impact on actual releases.

Since no credit has been taken in the accident analysis and the construction, testing, operation and maintenance of this system requires expenditures of significant resources, Georgia Power Company proposes to delete the non-essential portions of this system from the Unit 2 design as shown in the attached sketch.

The FSAR text describing this 0\\%

8706090433 870601 PDR ADOCK 05000425 P

PDR

U. S. Nuclear Regulatory Commission Electrica' Penetration Filter and June 1, 1987 Exhaust System Page Two

)

File: )7BC35 Log: GN-1374 proposed change is also attached.

Those portions of the system which are required to maintain the normal operating environment for equipment in these rooms will be combined with, and meet the design bases of, the Control Building normal HVAC system described in VEGP FSAR Section 9.4.1.

It is requested that any comments with respect to these proposed revisions to the design bases of this system be provided by June 15, 1987.

We will be pleased to meet with you at your convenience to discuss this proposal should it be necessary.

Sincerely, h.

J. A. Bailey Project Licensing Manager JAB:jc Attachment xc:

R. E. Conway J. P. O'Reilly P. D. Rice L. T. Gucwa R. A. Thomas J. E. Joiner B. W. Churchill M. A. Miller (2)

G. Bockhold, Jr.

NRC Regional Administrator NRC Resident Inspector R. Goddard R. W. McManus D. Feig NORMS I

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1 TABLE 1.3.1-2 (SHEET 2 OF 5) vogtle San Onofre farley Calvert Cliffs M

Unets 1 and 2 if$AR)

Unet$ 2 and 3 {fSAH)

Unets 1 and 2 iFSAR1 Units 1 and 2 ifSAR) i Containment ran coolers No. of unats 8

4 4

4 Airflow capacety.

43,500 31,000 60,000 60,000 i

I each at emergency cond e t s ons ( f t / min)

Au=ilaary feedwater system No. of pumps 2 elect ric-d riveu 1 e l ec t r i c-d r i ven 2 elect ric-driven 2 turbine-driven l

1 turbine-driven 1 t u rb i ne-d r e ven 1 turbine-driven inatiation Au t or'a t i c AutcmatIC Automatic Manua1 Condensate storage tanks 2

2 1

1 Capacity, each (gal) 480,000 480,000 150,000 (Cat. 1) 500,000; 350,000 l3

$O0,000 (Cat. 2)

Post-accident faaters Pe ping penet ra t ion a rea, fuel handleng bldg.

Penetration room Penetration room control room, p,l'andling badg.

h 7 fuel O

Containment spr.y i

No. of pumps 2

2 2

2 "3

Sptay addative NaOtt NaOH NaOH None Combustib;e gas enntrol Ilectric H w

2 recombeners Electric 182 recombiners Electric H 2 recombiners Liectric H2 r econibine rs I e n e de conta s siment ;

ins ide conta arineent; inside containmeint; insade contaariment; e-.

post-accedent manual post-accedent manual post-accident manual post-accident manual vent vent vent vent E a cct r e ca I.Compont2n t s

'.tandby powe r sy stem Total of 4 diesels; iotal of 4 diesels; lotal of 5 diesels; 3 deesels connected 2 supply each isnit.

2 supply each tenit.

3 are shared between to 4-kV Luses and Diesels are connected Diesels are connected Units 1 and 2. Diesels sha red t.e tween Un i t s to 4160-V blesus.

No to 86160-V buses.

No a re connected to 4160-1 and 2.

capabs lity for sha ring.

capabil e ty for sha ring.

V buses.

(ngencered sJfety Iw 4160-V buses /unsts Two 4160-V buses /unsts Six 4160-V buses / units Iwo 4-kV buses / units fea tess e basa.es deveded into 2 devided into 2 divided into 2 divided e rito sep.s ra te Q

sepa ra te and redundant s ep. orate and redundant sepa ra te and redundant and redundant systems gg systems systems systems N

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en 4-l l

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TABLE 3.2.2-1 (SilEET 74 OF 97)

(d)

(T)

(g)

(jl (a)

(b)

(c)

Vt GP (c)

Codes and Principal til tnviron-Prencipal System Location Source of Quality Safety Seismic Standards Construc-th)

Safety mental (k) and Compgnengs_

unig_1_Un s t_ g __St pply__ _Grpup_ glay_ galegory Qegnalgt ljgnJode R_Liig Reiggej Qgj[gna tor Cos!ae_nt}

j 11 Area coolers AB-209 AR-219 B

C 3

1 3

til-3 Y

Y Vill k 220 k 220 3

12. Safety-related B

NA 1

1 J

mfg Y

Y Note s instrumentation ROOM AND (I(CIRlCAL PEN (IHAllON eilIlRgtMHAUSI SYSitM N0kf Gh I.

fans C8-A60 CH-Al B

NA 0

1 5

AMCA Y

Y lx

& A61

& A6 2,

Ian moturs CB-A60 CH-Al B

NA i

1 E

NEMA MC1 Y

Y lx

& A61

& A6 3.

Moesture CB-A60 CB-A3 U

NA 0

1 5

ANSI N509 Y

Y lx elsminators

& A61

& A6 4.

Heaters Cit-A60 CD-A3 8

NA I

I i

UL. ANSI Y

Y lx

& A61

& A6 M509 5.

HIPA filters 08-A60 08-A3 8

NA 4

I 5

ANSI N509 Y

Y lx l25

& A69

& A6 6.

Cha rcoa l CH-A60 CB-A3 8

NA o

I 5

ANSI N509 Y

Y lx felters

& A61

& 46 7.

Diec two rk R

NA 0

1 5

ANSI N509 Y

Y 8.

Dampers B

NA 0

1 5

ANSI NSO9 Y

Y 9.

Dampe r mo t o rs B

NA 1

1 L

NIMA MGf Y

Y

<aQ

10. Safety-related 8

NA 1

1 J

mfg Y

Y Note s Q

instrumentation

• T1 DetSEL G1N(HA10R BullDING HVAC SV$ffM 1

W1 I25 1.

t Si supply Oft-2 TO'08-210' B

NA 0

1 5

AMCA Y

Y IV m>

fans 71 2.

ISI supply DB-270' DB-210' 8

NA 1

1 i

NEMA MG1 Y

Y IV 1

fan motors W

3.

Non-fSi DB-255'08-255' B

NA 6

2 6

AMCA N

N exhaust fans 4.

Non-IST 08-255'08-255 8

NA 6

2 E

NIMA MGl N

N emhaust fan motors 5.

Building unit 08-234'08-234' B

NA 6

2 E

OL N

N heaters 6.

EST ductwork B

NA O

1 5

ANSI N509 Y

Y 7.

EST dampers 8

NA 0

1 5

ANSI N509 Y

Y 8.

Non-fSt B

NA 6

2 6

SMACNA N

N ductwork 9.

EST damper B

NA 1

1 E

NEMA MCI Y

Y

}.

motors y

10. EST instru-8 NA 1

1 J

rifg Y

Y Note s y

mentation

11. Non-ESI 8

NA 6

2 J

mfg N

N 4

enstrumentation N

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VEGP-FSAR-3 TABLE 3.2.2-1 (SHEET 97A OF 97)

To assure the availability of this function, the associated portions of the instrument and service air system inside the container have been upgraded to satisfy Seismic Category 1 and ASME III design requirement.

ae.

Duct work in this system was upgraded to Seismic 1 30 requirement to provide additional margin in the structural design.

The quality assurance program is not applicable to the duct work.

af.

Design and installation to the technical requirement of 1971-S73 ASME Code without "CS" symbol stamp.

ag.

In the catalytic hydrogen recombiner package, the control panel and gas analyzer shall be nonnuclear safety, with no code requirements.

The pertinent provisions of the quality assurance program will be applied to items in the catalytic 3 ',

hydrogen recombiner package.

GENERAL NOTES 1.

For systems under the' Westinghouse scope of supply, all piping and all manual valves 2 in. and smaller are supplied by Bechtel, except for the reactor coolant loop piping, the pressurizer surge line, the pressurizer relief piping complex, reactor vessel bottom mounted instrument tubing, reactor vessel head vent piping to refueling disconnect flange, and reactor vesse; seal leak detection leakoff appurtenance.

2.

Hangers and supports for Seismic Category 1 systems and components are designed as Seismic Category 1.

In general hangers and supports for Seismic Category 2 piping, cable tray, and ducting.in Seismic Category 1 buildings are designed to maintain their structural integrity under the postulated earthquake conditions; however, exceptions to this requirement are permitted when it is demonstrated that their failure will not adversely affect adjacent Seismic Category 1 equipment cr systems.

"Q" listed coatings are assigned a project 3.

All classification of 02C.

Q listed coatings are not seismically qualified but will not fail in a manner that would compromise the function of safety-related equipment in the event of an earthquake since they are applied to Seismic Category 1 structures.

4.

The safety class, seismic category, and codes and standards designators of hangers and supports of the Category 1 piping 30 systems are the same as the piping system they support.

m Amend. 17 7/85 ah. The electrical penetra. tion room Amend. 30 12/86 filter and exhmst. system is not Amend. 32 12/86 provided for UMi 2,,

F VEGP-FSAR-9 9.4.5 CONTROL BUILDING ENGINEERED SAFETY FEATURES (ESF)

VENTILATION SYSTEMS Several features serve to reduce or limit the release of fission products to the control building following a postulated loss-of-coolant accident (LOCA) or fuel handling accident.

Among them are control room habitability systems discussed in section 6.4 and ESF filtration systems discussed in sub-section 6.5.1.

Section 6.4 provides a discussion of the control room heating, ventilation, and air-cenditioning (HVAC) system operation upon detection of high radiation, high toxic gas, and smoke.

Subsection 6.5.1 provides only discussion of the function of the emergency filter systems to mitigate the consequences of an accident.

This subsection provides the design bases and safety evaluation for the control building safety feature electrical equipment HVAC systems and control building HVAC equipment room ESF ventilation system for level 3, filter (gexhaustsystem$kand a sg discusses the control building electricel penetratio

1. The control building elec.trical oenetration room -filtec and exhaust Jystem is not provided % LMt

2..

9.4.5.1 Design Bases 9.4.5.1.1 Safety Design Bases 9.4.5.1.1.1 Control Building Safety Feature Electrical Equipment Room HVAC System.

A.

The control building safety feature electrical equipment room HVAC system provides a proper environ-and temperature for electrical equipment and ment maintenance personnel during normal conditions and postulated accident conditions.

B.

The safety features electrical equipment room HVAC system shall remain functional during a safe shutdown earthquake (SSE), design basis tornado, LOCA, major pipe rupture of main steam or feedwater line, or single failure of any component of the system.

C.

Each train of the safety features electrical equipment room HVAC system is powered from a separate and independent Class lE power system.

D.

The system minimizes the accumulation of hydrogen gas within the battery rooms.

i 9.4.5-1 Amend. 30 12/86

7~

t VEGP-FSAR-9 Room and 9.4.5.1.2.2 Electrical Penetration FiltergExhaust System.

Theelectricalpenetrationfff1tek(xhaustsystemhas A.

no power generation design bases.

B.

Normal ventilation of the penetration areas is accom-plished by the control building normal HVAC system.

(See subsection 9.4.1.)

yt C.

Emergency ventilation of the penetration areas is accomolished by the penetratio@/Iiltellgcontrolbuildingelectrical

~

exhaust system (not required as an 30 ESF).

• The contro t 6.itaig electe. cat penee aion e m fil+ce and exhoust system is not provided foe L4nii 2.

9.4.5.1.2.3 ControI Building ESF HVAC Equipment Room Ventilation System.

The ESF HVAC equipment room ventilation system is designed to provide the proper environment and temperature for ESF HVAC equipment.

9.4.5.1.3 Codes and Standards Conformance to Regulatory Guides 1.140 (Normal Ventilation Systems) and 1.52 (Post-Accident Systems) is described in subsections 1.9.140 and 1.9.52, respectively.

9.4.5.2

System Description

Classifications of equipment and applicable codes and standards are listed in table 3.2.2-1.

9.4.5.2.1 Control Building Safety Feature Electrical Equipment Room HVAC System The ESF switchgear rooms, battery rooms, and auxiliary relay rooms for train A are located at el 200 ft 0 in. and 180 ft 0 in.

Auxiliary relay rooms for train B are located at el 240 ft 0 in.

The essential HVAC units are located at el 180 ft 0 in, and el 240 ft 0 in. of the control building.

9.4.5-3 Amend. 30 12/86

r-a A

VEGP-FSAR-9 and 9.4.5.2.2 Electrical Penetration Room FiltergExhaust System %F roops and The electrical penetration filtergexhaust system consists of n

two filtration subsystems, trains A and B.

Each subsystem's fan is powered from a separate Class lE power supply and ener-gized automatically by the containment ventilation isolation (CVI) signal.

Each filtration subsystem has sufficient capacity to exhaust both train A and B penetration rooms.

The system is shown in figure 9.4.5-3 and the flow diagram is shown in figure 9.4.5-4. The Unit Z duc+ configuro. tion is shown in fiouces 9.4.5-5 and 9.4.5-6.

Each (xhaust filtration unit consists of a moisture eliminator, a heating coil, two high-efficiency particulate air (HEPA) fil-ter banks, a charcoal filter, and a fan.

l30 V The conicot Wilding electticoA pechMon room 91tur a.A4 ewhaast 4ys+em is not peouidea he L4aH 2.

9.4.5.2.3 Control Building ESF HVAC Equipment Room Ventilation System The control building ESF HVAC equipment room ventilation system for level 3 is shown in figure 9.4.1-5.

Two common intake ducts provide air to the filter and chiller rooms for each train associated with the two units.

Each room contains a nonsafety-related electric heater unit.

A safety-related exhaust fan is located in each of the four chiller rooms.

The fans exhaust the air from the chiller room and the associated filter room directly to the atmosphere.

One intake duct supplies air for the filter rooms: the other duct supplies air for the chiller rooms.

9.4.5.3 System Operation 9.4.5.3.1 Control Building Safety Feature Electrical Equipment Room HVAC System Upon receipt of a train-related safety injection (SI) signal, the essential ESF switchgear, ESE equipment, battery room, and auxiliary relay rooms HVAC system is automatically put into operation.

Transfer to the essential system may also be initiated manually from the control room.

The following actions take place automatically when transferring to the essential system:

Stopping the normal air handling unit.

e Stopping the normal outside air supply air handling e

unit.

l 9.4.5-5 Amend. 30 12/86 l

7-o VECP-ESAR-9

. Stopping the normal chilled water system.

e Activating both essential HVAC trains and their asso-e ciated essential chilled water systems.

After activation of both safety trains, one train may be taken out of service manually.

The recirculation fans draw outside and recirculated air through prefilters and the chilled water coils and discharge the air into the ESF switchgear rooms and the battery rooms.

The supply air temperature is controlled by a room thermostat which controls the modulation of the chilled water flow through the cooling coil.

For maximum cooling the air leaves the cooling coil at 56*F and maintains the rooms at the design maximum temperature of 100*F.

Battery rooms are provided with electric reheat coils to maintain a room design temperature range of 70*F to 80*F.

Outside air from the intake plenum at el 280 ft 6 in. is brought in to make up for the battery room air exhausted to the atmosphere at el 280 ft 6 in.

Fil+e r 9.4.5.3.2 Electrical Penetration Room Tilt ti::. and Exhaust Systemi4 Upon receipt of a train-related containment ventilation l30 isolation (CVI) signal, the normal ventilation system is isolated from the electrical penetration area.

The exhaust filtration units are activated to exhaust air to the atmosphere l30 through the plant vent.

% The contrat buil Aing e.lec+eled pendo.+ ion t eam fil+et omd ex heusi sys+e.m is tso+ wouided for- 04 a i t 2.,

9.4.5.3.3 Control Build!.ng ESF HVAC Equipment Room Ventilation System Air is supplied from the air intake plenum at el 291 f t 4 in, and exhausted at el 302 ft 0 in.

The system is started automatically by a space thermostat whenever the high preset limit of 90*F is reached.

The vent system may also be started manually from the control room.

electcic unit heater with an integral temperature controller,An preset at 65*F, design condition. cycles the heater to meet the minimum space Each ESF equipment room is provided with a temperature switch which provides a high or low alarm in the control room when the temperature is 105*F or 50*F, respectively.

l 9.4.5-6 Amend. 30 12/86 i

i

n VEGP-FSAR-9 i

TABLE 9.4.5-1 ENGINEERED SAFETY FEATURE VENTILATION SYSTEM COMPONENT DATA l

Control Building ESF Electrical Equipment Ventilation Unit Quantity 4

Airflow (ft / min) 12,730 l25 8

Static pressure (in. WG) 2.89 Motor horsepower (hp) 40 Cooling capacity (Btu /h) 660,000 l25 Chilled waterflow (gal / min) 140 Control Building Auxiliary Relay Room ESF Ventilation Unit Quantity 2

Airflow (ft'/ min) 1500 Static pressure (in. WG) 1.8 Motor horsepower (hp) 0.5 Cooling capacity (Btu /h) 40,000 l25 Chilled waterflow (gal / min) 5 Battery Room Exhaust Fans Quantity 4

3 Airflow (ft / min) 1380 (1600-Unit 2) l25 Static pressure (in. WG) 2 Motor horsepower (hp) 1.5 Control Building Electrical Penetration Room Filter and Exhaust Unit.$r Quantity

1. 2.

8 Airflow (ft / min) 6000 l25 Static pressure (in. WG) 9.4 Motor horsepower (hp) 20 Control Building Control Room ESF Equipment Exhaust Fan Quantity 4

1 Airflow (ft'/ min) 7050 l25 l

Static pressure (in. WG) 1.4 l

Motor horsepower (hp) 5 1

M"The Control builfing elec4rical pene4Pabn room filter ed cw haust Unas are noi pe wide d for LAn'i 4 2..

I Amend. 25 9/86