ML20135B283

Provides Info to Resolve Questions & Concerns Identified in Review of Repts 1-4 for App R Evaluation & Rept 5 for Branch Technical Position 9.5-1,App a Evaluation of Bldg 10.Page Changes for Repts 1-5,incorporating Resolutions,Encl

ML20135B283
Person / Time
Site:	Fort Saint Vrain
Issue date:	08/30/1985
From:	Lee O PUBLIC SERVICE CO. OF COLORADO
To:	Johnson E NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION IV)
References
P-85301, TAC-54373, NUDOCS 8509100508
Download: ML20135B283 (39)

Text

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August 30, 1985 P.O. Box 84o cenver. co 80201- 0840 Fort St. Vrain Unit No. 1 OSCAR R. LEE P-85301 VICE PRESIDENT Regional Administr:'or Region IV Nb U. S. Nuclear Regulatory Commission 611 Ryan Plaza Drive, Suite 1000 ( SB ,3 g Arlington, Texas 76011 1 @

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Attn: Mr. E. H. Johnson Docket No. 50-267

SUBJECT:

10CFR50, Appendix R Fire Protection Evaluation

REFERENCES:

1) PSC Letter, Lee to Johnson, dated August 17, 1984 (P-84281)

2) PSC Letter, Lee to Johnson, dated November 16, 1984 (P-84493), Report No. 1

3) PSC Letter, Lee to Johnson, dated December 17, 1984 (P-84526), Report No. 2

4) PSC Letter, Lee to Johnson, dated January 17, 1985 (P-85010), Report No. 3

5) PSC Letter, Lee to Johnson, dated February 4, 1985 (P-85048)

6) NRC Meeting Summary, from Wagner, dated February 8, 1985 (G-85048)

7) PSC Letter, Lee to Johnson, dated April 1, 1985 (P-85113), Report No. 4

8) PSC Letter, Lee to Johnson, dated May 31, 1985 (P-85187), Report No. 5

9) NRC Letter, Hunter to Lee, dated Au ust 2, 1985 (G-85314 0

8509100500 850830

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Dear Mr. Johnson:

This letter is intended to provide the necessary information to resolve staff questions or concerns identified in the review of Report Numbers 1 through 4 for the Fort St. Vrain Appendix R Evaluation and Report No. 5 for the Branch Technical Position 9.5-1, Appendix A Evaluation of Building 10. Also included is the response to Reference 9. In addition, there are 20 copies of page changes for Reports 1 through 5 which incorporate information related to the following resolutions, and to correct errors that have been identified. Please arrange to have the revised pages inserted into the 20 reports forwarded by each of those referenced letters.

1. Access Control Bay Fire Detection - Mr. Dennis Kubicki indicated that page 3-8 of Report Number 4 was not clear as to whether fire detection will be provided at elevation 4846'-6" of the Access Control Bay. Section 4.5 (Page 4-3) of Report No. 4 notes that fire detection will be provided in the Reactor Plant Exhaust Fan Room at elevation 4846'-6" of the Access Control Bay. A revised page 3-8 has been prepared and is attached to clarify that fire detection will be provided at this location.

2. Building 10 Structural Steel - Mr. Kubicki indicated that he had a concern relative to unprotected structural steel in Building 10 areas that did not have automatic fire suppression system coverage. All of these areas were identified and analyzed with respect to fire loading and building design features. We generally concluded that none of the structural steel in question required fire proofing because of the very low fire leading in place. This issue is discussed in detail on new Report No. 5 pages 3-15 through 3-17, which are attached.

3. Reactor Building Exhaust Fans - Mr. Kubicki requested information to demonstrate that a recirculation fan and chiller unit will provide adequate cooling within the Reactor Building in lieu of a Reactor Building exhaust fan.

It should be noted that the recirculation fan and chiller units are the normal means for removing heat from the Reactor Building. The exhaust only mode of ventilation would rely on outside air entering the Reactor Building through the ventilation intake to provide mixing with room air; hotter air from the Reactor Building would be exhausted through the exhaust fans. A recirculation fan, with chiller unit, is approximatc:y the same air flow capacity as a Reactor Building exhaust fan, but with the capability to supply cooler air than outside air through use of the

chiller unit. Accordingly, a recirculation fan and chiller unit provides greater cooling capacity than a Reactor Building exhaust fan. A page change to Page 3-13 of Report No. 4, is attached.

4. Hand-Held Lights -

Mr. Kubicki indicated that he had a concern relative to the use of portable hand-held lights for access to outbuildings. The use that is proposed is similar to situations at other plants where exemptions were granted for the use of portable hand-held lights to traverse open yard areas (reference Oconee and McGuire Nuclear Stations).

The basis for the exemption was that the portable hand-held lights were a backup to the yard lights, which were subject to loss or interruption for a loss of offsite power, and that the portable hand-held lights were adequate to ensure safe operator access when traversing the open yard area and would only be used for such.

For Fort St. Vrain, hand-held lights will be provided in the Control Room for operator use in traversing the open yard area from the Turbine Building to the outbuildings required to energize the ACM Diesel Generator (DG) backed emergency lighting systems when required for certain fires in the Turbine or Reactor Buildings. Access routes from the Control Room to an outside door will be provided with battery backed emergency lights with a minimum of 90-minutes capacity, which is more than enough time to start the ACM DG and energize the ACM DG-backed emergency lighting systems.

The hand-held portable lights will be used as a backup to the yard security lighting to ensure safe operator access to the outbuildings required to activate the ACM DG-backed emergency lighting systems, which include the yard security-lighting. The use of portable hand-held lights would only be required in the event of a loss of offsite power at night, when the yard security lighting would be unavailable until the ACM DG was started and connected as a backup to the security system per existing procedures. Outbuildings requiring operator action to accomplish the lighting system transfer will have battery backed emergency lights in accordance with proposed modification 4.4.c of Report No. 4.

Once the yard security lighting is restored, adequate lighting is available for safe operator access to other outbuildings where manual operator actions may be required.

The yard security lighting system would not be affected by a fire in the Turbine or Reactor Buildings. Based on the above, we feel use of portable hand-held lights in a limited application as a backup for a specific condition (i.e., a fire, necessitating use of the ACM DG-backed emergency

lighting system, concurrent with a loss of offsite power at night) is justified and is adequate to ensure safe operator access to the necessary outbuildings -to restore yard security lighting for subsequent operator actions that may be required.

5. Building 10 Compliance with Appendix R - The Report No. 5 Fire Hazards Analysis has been revised to incorporate details on fire protection shutdown components in each Building 10 fire area, and the basis for compliance with Appendix R. Page changes for this revision are attached.

We understand that the above information should resolve any remaining concerns or questions from Mr. Kubicki relative to the fire protection review of the Fort St. Vrain evaluations and exemption requests submitted in Reports 1 through 5. Since design of modifications is proceeding, and Public Service is moving ahead with implementation of the modifications as plant activities and operational status permit,'we would appreciate completion of the NRC staff review and issuance of an SER for these modifications and exemption requests in the near future.

If you have any questions, please contact Mr. M. H. Holmes at (303) 571-8409.

Very truly yours, 0.dfu/f & W J

0. R. Lee, Vi e President Electric Production ORL/FT:pa

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REPORT NO. I f PAGE CHANGES i i

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TENERA h CORPOltVIlON

l TABLE 2.3-I PROCESS MONITORING INSTRUMENTATION FORCED CIRCULATION COOLING Function Inst. No. Range Ref. Power Supply B.I Nuclear inst. SD 1 I-1, FSAR Fig.

Wide Range: NI-II33-1I/ Approximately 7.3-22, Inst. Bus I A 10-6-103 IC-l 1 - 1.

% Rx Power B.2 Nuclear Inst. SD-93-I l-1, FSAR Fig.

Wide Range: NI-l134-11/ Approximately 7.3-22, Inst. Bus IB 10-6-103 IC-II-l.

% Rx Power i F.I Core Heat Removal Circulotor i A SD 1 I -2, Helium Flow PDI-I 157-2 -0.05-0.50 psid IC-ll-3 Inst. Bus 3 F.2 Core Heat Removal Circulotor !C SD-93-1 I-2,

, Helium Flow PDI-I l 58-2 -0.05-0.50 psid IC-11-3. Inst. Bus 3 G.I S/G Feedwater Flow G.I.I Loop iFW FR-2205 0-400,000 PI-22-1 Inst. Bus 1 A lbs./hr.

G.I.2 Loop 2FW FR-2206 0-400,000 PI-22-6 Inst. Bus IB lbs./hr.

G.2 S/G Exit Temp G.2.1 Loop ITemp TI-22121 0-12000F PI-22-2 Inst. Bus l A (or TR-22121, Pen l}

G.2.2 Loop 2 Temp TI-22122 0-12000F PI-22-7 Inst. Bus iB (or TR-22121, Pen 2)

DC-84-21 -I- Rev.4 TENERA h CORPORKIXW

1 TABLE 2.3-I PROCESS MONITORING INSTRUMENTATION FORCED CIRCULATION COOLING (Contfnued)

Function Inst. No.~ Range Ref. Power Supply H.I RCS Integrity . SD 1 1 -2 Primary Coolant l Press. PI-I 1082/ 0-1000 psio IC-l 1-2 (Sht.1) Inst. Bus l A Cire. Inlet I Coolant Temp TI-I 1871/ "100-10000F IC-l I-3 Inst. Bus 3 I (TE-l 173 Input)

H.2 RCS Integrity SD-93-11-2 Primary Coolant Pres. PI-I 1092/ 0-1000 psio IC-11-2 (Sht. 2) Inst. Bus IB l Cire. Inlet Coolant Temp ' TI-I1872/ 100-10000F iC-11 -3 Inst. Bus 3 i p)

( (TE-l 177 input) l I/ Not required for fire protection shutdown. See discussion in Report No. 4, Section 2.17 and AppendixLC.

2/ Not required for fire protection shutdown. See discussion in Exemption Request 3.10 and Table 3.10-1, item 4 of Report No. 4.

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TENERA h CORIGATION

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. (continued)

F.P. Shutdown Train A F.P. Shutdown Train B Valves - Manual Only (Continued): Volves - Manual Only (Continued): /

Table 2.1-6 Sht 1I V-461522 Table 6.3-1 (Rpt.3) V-46349 V-46342 V-461633 l

-V-46346- V-92114 2.1-6 Sht l l V-461643 V-92117 6.3-1 (Rpt.3) V-32102 V-21754 V-46251 V-46349 V-461633 Instrumentation: Instrumentation:

Process Monitoring Process Monitoring PDl-l 157-2 PDI-I 158-2 FR-2205 FR-2206 TI-22121 or TR 22121 Pen l TI-22122 or TR-22121 Pen 2 f

I DC-84-21 13 Rev.4 I__________-_---__-________-____--____-___. _ _ _ _ . . -__ ___

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O REPORT NO. 2 PA CHANGES O

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TARLE 2.3-1 t

HSTRUAENTATION CIRCUlTS 1

Fire Power i Protection Instrument Hot Supply Other Shutdown Fmetion Supporting Instrument Cable Power Shorts Coord. Schematic Document i Train Required Indicator instruments Location Numherf 7) From/To -Supply Fvoluotion Evoluotion Diagram References i

A Monitor PDI-I 157-2 PDI-I 157-2 I-05 (Note 4) (---) Other PDT's IC-lI-3 E-1328 Circulator PDM-I l 57-2 1-05 (Note 4) 120Voc Interr. or common E-1332 1 C-2101 PDT-I I57-2 Local (C3XI) 21315 l-05/PDT Bus 3 of I-05 120Voc E-1333 Helium Flow 21320 1-05/C3Xl supply are E-1334

. PDE-l157-2 Local Local Local local at 93-1-15-74

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Poge 7 TABLE 2.3-1

! NSTRUMENTATION CIRCUlTS i

. NOTES:

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(1) Instruments required to provide circuit continuity.

(2) Cables numbers represent cables whose potential to cause hot shorts must be verified.

(3) Panels listed require further verification of power supply coordination.

i (4) These components are locate <' in the CCA, and thus are not of concern for fires in non-CCA locottons.

(5) Note that I-34, are located in the CCA.

(6) It rnust be wrified that a power supply to this instrument be present to maintain circuit continuity, f7) Cable numbers in parentheses ( ) are located in the CCA only.

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TAEE.E 2.3-2 POWER SLFPt.Y COORDINATION .

j' Power Power Feeder.

, Supply Supply Bus j input Output Protection Fuse-F/ Fuse-F/ Other Fuse-F/ Other 2

Power Circuit Circuit Devices Power Supply Circuit Devices on

, instrument Supply Breaker.CR Breaker-CB on Output Feeder Hus Breaker CB Feeder Bus Drawings / Comments l-

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TARLE. 2.3-2 POWER SLFPt Y COORDINATION

Power Power Feeder Supply Supply Bus input Output Protection Fuse-F/ - Fuse-F/ Other Fuse-F/ Other Power . Circuit Circuit Devices Power Supply Circuit Devices on Instrument Sely Brealser-CB Breaker-CB on Output Feeder Bus Breaker-CB Feeder Bus Drawings / Comments TI-22121 TT-22121 120 Vac Bus 1 None None See E-1522 120 Voc Bus 1 30 A-CB & See E-l102 E-1203, pg.1888

@ l-358 Each dev ce Dist. Panel I A 8

Two 15 A-F E-1510 t is separate- Drawing E-1102 E-1522 ly fused. (Cable in CCA) E-IIO2 t

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TI-22122 TT-22122 120 Vac Bus 2 None None See E-1523 120 Voc Bus 2 30 A.CB & See E-IlO3 E-1203, pg.1887

@ l-368 Each device Dist.Panet IB Two 15 A-F E-1510 is separate- ' Drawing E ll03 E-1523 2

ly fused. (Cable in CCA) E-Il03 i

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Page 6 TARLE 2.3-2 POWER SIFPl Y COORDNATION l

i Power Power Feeder

. Supply Supply Bus ,

! Input Output Protection -

l. Fuse-F/ Fune-F/ Other Fuse-F/ Other i Power Circuit Circuit Devices Power Supply Circuit Devices on 1

! Instrument Supply Rreaker-CR Breaker-CR on Output Feeder Rus Breaker-CB Feeder Rus Drawines/ Comments i

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' Input Output Protection

Fuee-F/ Fuse-F/ Other Fuse-F/ Other Power Circuit Circuit Devices Power Supply Circuit Devices on Instrument %eply Breaker-CR Breaker-C8 on Output Feeder Bus Rreaker-CB Feeder Bus Drawings / Comments .',

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I DC-84-24 Rev.3

Pagei O TABLE 4.1-1 FORCED CIRCULATION COOLDOWN REQUIRED ELECTRICAL EQUIPMENT OUTSIDE CCA F.P. Shutdown Train "A" F.P. Shutdown Train "B" 4160V AC Switch Gear ACM Bus N-4866 Load Test Bus N-4869 HVAC Bus N-92S7 Switch Gear Bus 2 N-9210 Switch Gear Bus I N-9206 480V Switch Gear ACM 480 V Switch Gear N-4868 Al60-480V Transformers ACM Bus Transformer N-4867 Load Center Switchgear j Transformer i Motor Control Centers Reoctor Plant MCC-lC N-9229C Reactor Plant MCC-3 N-9231

! ACM MCC N-4870 Turbine Building MCC-3 N-9208 Inverters Inverter / Static Inverter / Static Transfer Switch l A N-9289 Transfer Switch IB N-9290 l

l DC-84-24 Rev.3 TENERA h CORR *Ki1ON

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l Page 2 i O TABLE 4.1-1 FORCED CIRCULATION COOLDOWN REQUIRED ELECTRICAL EQUIPMENT OUTSIDE CCA F.P. Shutdown Train "A" F.P. Shutdown Train "B" Control Ponels - Instrument Rocks ACM Diesel Generator N-4866 Diesel Generator IB l-9202X Reactor Plant Equipment l-93123 HVAC Instrument Cabinet I-730lX Rock ID Reactor Plant Air Conditioning ,

Turbine Building Equipment l-9355 Turbine Building Equipment I-9354

. Rock IE Rock ID Battery Banks Diesel Fire Pump Battery I or 2 ACM DG Batteries N-4887 Battery Chargers

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ACM DG Battery Charger (At D.G.)

Instruments Bearing Water Surge LT-21135 Bearing Water Surge LT-21136 Tank Level LSL-2137 Tonk Level LSL-2138 Torbine Water Drain LSL-21113 Turbine Water Drain LSL-21113 Tonk Level Tonk Level Emergency Bearing Water PDIS-21393 Filter Differential Pressure i

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O DC-84-24 Rev.3 TENERA h CORIU(ATION

Page 3 O TABLE 4.1-1 FORCED CIRCULATION COOLDOWN

! REQUIRED ELECTRICAL EQUIPMENT OUTSIDE CCA

n F.P. Shutdown Train "A" F.P. Shutdown Train "B" Feedwater Flow Loop i FT-2207 Feedwater Flow Loop 2 FT-2208

{ Steam Generator TE-2205 Steam Generator TE-2206 i

I Circulator I A, C2101, PDT-il57-2 Circulator IC, C2103, PDT-l 158-2 Flow, Low Range Flow, Low Range Exit Temperature Monitor TE-22121 Exit Temperature Monitor TE-22122 Loop 1 Steam Generator Loop 2 Steam Generator Service Water Return LS-4208-2 Sump Level i

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DC-84-24 Rev.3 TENERA h CORIURN110N

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-1 TABLE 4.1-2 FORCED CIRCULATION COOLDOWN CABLES OUTSIDE CCA (CONTINUED) l i

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FP Shutdown - Train A FP Shutdown - Train B l 120 Voc and 125 Vdc Power Cables 120 Voc and 125 Vdc Power Cables 4

143 144 4

145 146

. 1I57 1027 1158 l

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-- .__.-.--__________.___.._._c

i TABLE 4.I-2 j

FORCED CIRCULATION COOLDOWN CABLES OUTSIDE CCA (CONTINUED)

FP Shutdown-Train A FP Shutdown - Train B  ;

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Instrurnentation Cables instrumentation Cobles 1 16164 6607 16169 16l56 16898 16157 17395 16161 I8030 16451

'l 21315 17354 i 21320 17924 4 21265 i 21270 l

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REPORT NO. 4 PAGE CHANGES l

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i TENEIM h COHIORATM)N

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The Turbine Building is considered to be a single fire area containing plant arrangements wherein redundant safe shutdown components are within close h proximity to each other. These interactions do not currently conform to the I requirements contained in Section Ill.G.2 to Appendix R; however, PSC proposes i to re-route cables, and other modifications such that either conformance to Section Ill.G.2 or an equivalent level of fire protection results (see Exemption i

j. . Request 3.1l). Hose stations and fire extinguishers are available throughout the Turbine Building. Emergency lighting will be provided (see Exemption Request

$ 3.8) in the Turbine Building and will ossure adequate illumination for personnel ,

{' egress and access to essential equipment.

PSC proposes to install a fire detection system at elev. 4846'-6" of the access control boy of the Turbine Building and area coverage of the grade and mezzanine elevations of the Turbine Building fire area, except for the turbine f

l generator operating floor. The fire detection system will conform to NFPA 72D l and 72E.

I j 3.3.3 Evaluation i

{

O This area does not comply with Section Ill.G.2 because of the plant arrange-ments, wherein redundant divisiou of cables / equipment are not separated by j l

j 20 feet free of intervening combustibles, and automatic fire suppression and fire ,

! detection systems are not provided throughout the fire area. The major fire -

hazards are protected against by fire rated enclosures or by a fire suppression system or both. The balance of the intervening combustibles are dispersed l throughout the Turbine Building and do not present a significant fire threat.. i

! ' Selected cables / equipment of redundant divisions will be re-routed to improve

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separation. The lock of an automatic fire suppression system on an area-wide basis and the adequacy' of the ' resulting separation following re-routes are {

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j oddressed in Exemption Request 3.11. PSC proposes to install a fire detection ,

f system throughout the area of the first two levels of the Turbine Building and at elevation 4846'-6" of the Access Control Bay, but not on the third level (turbine l generator floor) of the Turbine Building. Section 4.0 includes figures depicting the locations to be provided coverage with fire detection devices.

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} DC-85 3-8 'Rev.I TENERA h CORPORATION

Automatic fire detection in accordance with NFPA Standards 72D and 72E will be provided throughout this floor level of the access control bay. Finally, emergency lighting will be provided for the Turbine Building areas, to include the access control bay, os described in Exemption Request 3.8.

3.S.3 Evoluotion This oreo does not comply with Section Ill.G.2 because the reactor plant exhoust fans and circuits are not separated by 20 feet free of intervening combustibles.

Automatic fire suppression and fire detection systems are not provided through-out the fire creo. PSC proposes to re-route the cables and transfer switches to the A-train fan and provide o fire detection system throughout the 4846'-6" elevation of the access control bay. The A-train cables will be located greater than 35 feet from B-train cables, except where the A-train cables approach the j

fan units, where the separation will opproach 20 feet. Automatic fire suppression will not significantly enhance the fire protection safety of the creo due to the low fire loading, which is equivalent to approximately 16 minutes.

The Intervening cables between the fans are in conduit. Charcoal filters are contained in the metal filter housing and provided with water spray protection.

This further reduces the fire load.

A fire which occurs in this crea will be small and rapidly detected by the proposed fire detection system. The re-routing of the A-train fan cables, the physical separation of the fans, and the enclosure of the fans by the metal duct will prevent damage until the fire brigade arrives and extinguishes the fire.

Even if all reactor plant exhoust fans were damaged by a fire, alternative cooling for the Reactor Building is available through a chiller unit and recirculo-tion fan. The chiller, fan, associated cables and supporting chilled water system cables and components are located in the Reactor Building, the Water Chiller ,

Building or routed in underground duct banks. Required components in the Reactor Building (using fan S-73205) are located greater than 45 feet from elev.

4846'-6" of the Access Control Boy, and separated by the steel wall. The chiller j units are the normal method of heat removal from the Reactor Building. One I

chiller unit has opproximately the same air flow capacity as o single Reactor Building exhoust fan, with the capacity to supply 60 F air that enters the unit at p 105 F.

O DC-85-04 3-13 Rev.I TENERA h CORlWrKW

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l Refer to Exemption Request 3.8 for further details and criteria (2.27, 3.8). l 1

(b) Three-Room Complex - The present DC-powered emer-gency lighting system within the Three-Room Complex will be modified so that all power feeds remain inside the CCA. With this change, the lighting system will not be

, affected by a fire outside of the Three-Room Complex.

(c) Out-Buildings - Eight-hour battery pack lights will be installed in the following out-buildings:

- Circulating Water Pump Pit

- 4kV switchgear enclosure (Bus I,2, and 3)

- 4kV switchgear enclosures (HVAC)

- ACM 4kV switchgear .

- Turbine evaporative cooling building (d) Access to Out-Buildings - Portable hand-held lights will be made available to provide lighting for access to out-buildings. In addition, occess routes from the Control Room to an outside door will be provided with battery pock lights with a minimum of ninety minutes capacity, which is more than enough time to stort the ACM die.wl generator (DG) and energize the ACM DG-bocked t emergency lighting systems.

4.5 FIRE DETECTION The following fire detection system upgrades will be modes (c) Reactor Building Fire Area - Complete fire detection coverage below elevation 488I' and at 4756' will be provided. Other elevations will have spot or partial coverage in areas of cable concentration or where required due to location of fire protection safe shutdown components or cabling.

(b) Turbine Building Fire Area - Area-wide fire detection coverage will be provided at the grade and mezzonine 1

levels of the Turbine Building. (3.3)

(c) Turbine Building Access Control Bay - Fire detection coverage will be provided in the Reactor Plant Exhaust Fan room at elevation 4846'-6". (3.5)

Figures I through 7 depict the locations to be provided coverage with fire detection devices.

O DC-85-04 4-3 Rev.1 TENERA 8 CORIMATION

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4 REPORT NO. 5 PA& CHANGES 1

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FIRE HAZARDS ANALYSIS b

O Building: Ten Room (Fire Areo): Training Office Rooms (T-l)

Elevation: 4835'-6" Safety Related: No Construction i

North Wall: 12" reinforced concrete East Wall: 12" reinforced concrete 1 South Wall: 12" reinforced concrete West Woll: 12" reinforced concrete Celling: Noncombustible suspended ceiling under a concrete roof Floor: Resilient tile on concrete Drainage: None Ventilation: Yes - Mechanical HVAC Fire Detection: Yes - lonization throughout the area 1

O' Fire Protection: No automatic fire suppression; two ABC dry chemical extinguishers provided Emergency Lighting: Yes - However, not in the form of sealed beam, 8-hour

battery pack units. The normal lighting system will be connected to the ACM diesel, and the emergency lighting i'

system is bocked up by the battery iC ond a diesel generator.

No manual actions are required within Building 10 for post-i fire shutdown. Therefore,8-hour bottery pack lights are not required.

Required Fire Protection

! Shutdown Components in Fire Area None Area (sq. ft.): 1,092 Fire Hazard (BTU /sq. ft.): 58,400 Fire Hazard Classification: Low Compliance With Complies because there are no fire protection shutdown Appendix R (Sect. Ill.G) components in the fire arco, and 8-hour battery pack lights and Separation Criteria: are not required.

DC-85-16 3-2 Rev.l TENERA $ CORPORATKW

.4 FIRE HAZARDS ANALYSIS O

U Building: Ten Room (Fire Area): Computer Services Office (T-2)

Elevation: 4824'-0" Safety Related: No Construction j North Wall: 8" concrete block East Wall: 12" reinforced concrete South Wall: 12" reinforced concrete West Wall: 8" concrete block Ceiling: Noncombustible suspended ceiling under concrete on metal l pan .

Floor: Reslient tile on concrete j

Drainoge: None Ventilation: Yes - Mechanical HVAC 4

Fire Detection: Yes - lonization throughout the creo i Fire Protection: No automatic fire suppression; Halon 121i fire extinguishers provided Emergency Lighting: No - No manual actions are required within Building 10 for post-fire shutdown. Therefore, 8-hour battery pack lights are not required.

Required Fire Protection

Shutdown Components in Fire Area

None Area (sq. ft.): 644 Fire Hazard (BTU /sq. ft.): 58,400 Fire Hazard Classification: Low Compilance With Complies because there are no fire protection shutdown Appendix R (Sect. Ill.G) components in the fire area, and 8-hour battery pack lights and Separation Criteria: are not required.

DC-85-16 3-3 Rev.I I

TENERA h CORM *NIKW

FIRE HAZARDS ANALYSIS (v

Building: Ten Room (Fire Area): Electrical Equipment Room (T-2)

Elevation: 4824'-0" Safety Related: No Construction North Woll: 12" reinforced concrete East Wall: 12" reinforced concrete South Wall: 8" concrete block West Woll: 12" reinforced concrete Ceiling: 12" concrete over metal pan Floor: Concrete Drainoge: No Ventilation: Yes - Mechanical HVAC Fire Detection: Yes - lonization throughout the area Fire Protection: Yes - Halon Suppression System CO2fire extinguisher provided Emergency Lighting: Yes - However, not in the form of sealed beam, 8-hour battery pack units. The normal lighting system will be connected to the ACM diesel, and the emergency lighting system is backed up by the bottery lC and a diesel generator.

No manual octions are required within Building 10 for post-fire shutdown. Therefore,8-hour battery pack lights are not required.

Required Fire Protection Shutdown Components in Fire Area: None Area (sq. ft.): 385 Fire Hozord (BTU /sq. f t.): 58,400 Fire Hozord Classification: Low Compliance With Complies because there are no fire protection shutdown Appendix R (Sect. lli.C) components in the fire area, and 8-hour bottery pack lights p and Separation Criterlos are not required.

\j DC-85-16 3-4 Rev.l TENElu $ GEM *XIlON

1 i

FIRE HAZARDS ANALYSIS O Building: Ten Room (Fire Area): Computer Room North (T-2)

Elevation: 48 I l'-0" Sofety Related: No-Construction North Wall: 12" reinforced concrete East Wall: 12" reinforced concrete South Wall: 8" concrete block West Woll: 12" reinforced concrete Celling: Concrete on metal pon Floor: 12" raised noncombustible computer room floor ,

Drainoge: I Condensate drain Ventilation: No - Mechanical HVAC Internal recirculation J

t Fire Detection: Yes -lonization above and below floor throughout the oreo Fire Protection: Yes - Holon Suppression System,121 l fire extinguishers provided Emergency Lighting: Yes - However, not in the form of sealed beam, 8-hour battery pock units. The normal lighting system will be connected to the ACM diesel, and the emergency lighting system is backed up by the bettery iC ond a diesel generator.

No manual actions o'e required within Building 10 for post-i fire shutdown. Therefore,8-hour bottery pock lights are not required.

Required Fire Protection Shutdown Components in Fire Area: None Area (sq. ft.): 532 l Fire Hazard (BTU /sq. ft.): 58,400 Fire Hazard Classification: Low

, Compliance With Complies because there are no fire protection shutdown Appendix R (Sect. Ill.G) components in the fire area, and 8-hour ba%ery pack lights and Separation Criterlas are not required.

O]

L

., DC-85-16 3-5 Rev.I 4

TENERA h G*MENI10N

- ~ ~- e , -. -- , ,n. - _ .. , ,--~- --.,4 , .. 7 ,--m, _ . . . _ _ , _ , , . . _ . .

FIRE HAZARDS ANALYSIS (G

Building: Ten Room (Fire Area): Computer Room South (T-2)

Elevation: 48 I l'-0" Safety Related: No Construction North Wall: 8" concrete block East Wall: 12" reinforced concrete South Wall: 12" reinforced concrete West Wall: 12" reinforced concrete Celling: Concrete on metal pan Floor: 12" raised, noncombustible computer room floor on concrete Drainoge: I Condensate drain Ventilation: No - Mechanical HVAC Internal recirculation Fire Detection: Yes - lonization above and below floor throughout the area

" Yes - Halon Suppression System, one 121l fire extinguisher Fire Protection:

provided Emergency Lighting: Yes - However, not in the form of sealed beam, 8-hour battery pack units. The normal lighting system will be connected to the ACM diesel, and the emergency lighting system is bocked up by the battery IC ond a diesel generator.

No manual actions are required within Building 10 for post-fire shutdown. Therefore,8-hour battery pack lights are not required.

Required Fire Protection Shutdown Components in Fire Areat None Area (sq. ft.): 532 Fire Hazard (BTU /sq. ft.): 58,400 Fire Hazard Classification: Low Compliance With Compiles because there are no fire protection shutdown Appendix R (Sect. Ill.G) components in the fire creo, and 8-hour battery pack lights and Separation Criteria are not required.

O O

DC-85-16 3-6 Rev.1 TENHtA h GMKEN110N

FIRE HAZARDS ANALYSIS r~S Bu!Iding: Ten Room (Fire Area): Inverter l-B (T-3)

Elevation: 4791'-0" 4800'-6" Sofety Related: Yes Construction North Wall: 8" concrete block East Wall: 12" reinforced concrete >

South Wall: 12" reinforced concrete West Woll: 12" reinforced concrete Ceiling: Concrete on metal pon Floor: Concrete Drainage No Ventilation: Yes - Mechanical HVAC

, Fire Detection: Yes - lonization throughout the area Fire Protection: Yes - Halon Suppression System,121I fire extinguishers provided O

V Emergency Lighting: Yes - However, not in the form of sealed beam, 8-hour battery pack units. The normal lighting system will be connected to the ACM diesel, and the emergency lighting system is backed up by the bottery lC und a diesel generator.

No manual octions are required within Building 10 for post-fire shutdown. Therefore,8-hour bottery pack lights are not required.

Required Fire Protection F.P. Shutdown Train A: Cables 143 and ll57 for Instro-i Shutdown Componenis ment / control power A.

In Fire Areas F.P. Shutdown Train B: Inverter IB: Distribution Panel 18-l: Cables 144,146, and ll58 for instrument / control power B.

Area (sq. ft.): 504 Fire Hazard (BTU /sq. ft.): Negligible Fire Hazard Classification: Low: Transient fire only Compliance With Complies. Train A cables 143 and 1157 are wrapped in a Appendix R (Sect. Ill.G) 1-hour fire rated barrier, and there is automatic fire suppres-and Separation Criterlot sion coverage.. Exemption Number 3.4 Justifies existence of l unprotected structural steel (see page 3-10 of Report No. 4).

n v

DC-85-16 3-7 Rev. I TliNERA $ G

• M ENrlON

FIRE HAZARDS ANALYSIS -

Building: Ten Room (Fire Area): Mezzanine I-C (T-3)

Elevation: 4800'-6" Safety Related: Yes Construction North Wall: 12" reinforced concrete East Wall: 12" reinforced concrete ,

South Woll: None West Wall: 12" reinforced concrete i Celling: Concrete on metal pan Floor: Concrete Drainage: No l Ventilation: Yes - Mechanical HVAC Fire Detection: Yes -lonization throughout the area Fire Protection: Yes - Halon Suppression System,121l fire extinguishers provided Emergency Lighting: Yes - However, not in the form of sealed beam, 8-hour bottery pack units. The normal lighting system will be

, connected to the ACM diesel, and the emergency lighting system is backed up by the bottery iC and a diesel generc+or.

No monual actions are required within Building 10 for ;.ost-fire shutdown. Therefore,8-hour bottery pock lights are not required.

j Required Fire Protection F.P. Shutdown Train A: Cables 143 and 1157 for instru-

• Shutdown Components ment / control power A.

in Fire Area: F.P. Shutdown Train B: Inverter IB; ' Distribution Panel

^

IB-l: Cables 144,146, and 1158 for instrument / control power B.

Area (sq. ft.): 672 Fire Hazard (BTU /sq. ft.): Negligible Fire Hazard Classificotton: Low: Transient fire only Compliance With Complies. Train A cables 143 ond 1157 are wrapped in o Appendix R (Sect. Ill.C) l-hour fire rated barrier, and there is automatic fire suppres-

and Separation Criteria slon coverage. Exereption Number 3.4 justifies existence of '

unpretected structural steel (see page 3-10 of Report No. 4).

0 v

DC-8S-16' 3-8 Rev.l TENERA @ G*M*ATION

4 FIRE HAZARDS ANALYSIS O

Building: Ten Room (Fire Area): Battery Room I-C (T-4) l Elevation: 4791'-0"

/, Safety Related: Yes

( Construction North Wall: 8" concrete block East Wall: 12" reinforced concrete

. South Wall: 8" concrete block West Woll: 8" concrete block

! Celling: Concrete on metal pan

! , Floor: Concrete j , Drainage: No j Ventilation: Yes - Mechanical Ventilation 1

Fire Detection: Yes -lonization throughout the area

i l Fire Protection

Yes - Holon Suppression System

.i

Emergency Lighting

No - No manual actions are required within Building 10 for

, post-fire shutdown. Therefore, 8-hour battery pack lights i are not required.

Required Fire Protection F.P. Shutdown Train A: None Shutdown Components F.P. Shutdown Train B: None -

in Fire Area:

! Area (sq. f t.): 120 Fire Hazard (BTU /sq. ft.): 75,000

$ Fire Hazard Classification: Low 4' ,

Comp!Ionce With Complies because there are no fire protection shutdown i

1, Appendix R (Sect. Ill.C) components in the fire arco, and 8-hour battery pock ' lights j ond Separation Criteria: are not required.

e DC-85-16 3-9 Rev.I L, TENERA h CORM *ATION

. ,.. , . - - - , , .- .. . - . - . . , , -, ..e - .,, -_. - ,-.a- .. . - -.- -, ...- ,.~.-....- , - -

l FIRE HAZARDS ANALYSIS Building: Ten Room (Fire Areo): Inverter l-A (T-5) 1 Elevation: 4791'-0" Safety Related: Yes Construction

, North Wall: 12" reinforced concrete East Woll: 12" reinforced concrete South Woll: 8" concrete block West Woll: 12" reinforced concrete Ceiling: Concrete on metal pon Floor: Concrete Drainoge: No' Ventilation: Yes - Mechanical HVAC Fire Detection: Yes - lonization throughout the crea Fire Protection: Yes - Halon Suppression System,121i fire extinguishers O provided Yes - However, not in the form of sealed beam, 8-hour l Emergency Lighting:

battery pack units. The normal lighting system will be connected to the ACM diesel, and the emergency lighting system is bocked up by the battery lC cnd a diesel generator.

No manual octions are required within Building 10 for post-fire shutdown. Therefore,8-hour battery pock lights are not required. 1 Required Fire Protection F.P. Shutdown Train A: inverter At Cables 143, 145 and Shutdown Components 1157 for instrument / control in Fire Area: , power A; Distribution Panel l A-1 l

F.P. Shutdown Train B: None Area (sq. ft.): 472 Fire Hazard (BTU /sq. ft.): Negligible Fire Hazard Classification: Low; Transient fire only Compliance With Only one fire protection shutdown train Is' located within fire Appendix R (Sect. Ill.G) crea T-5, which is enclosed by a 3 hour3.472222e-5 days <br />8.333333e-4 hours <br />4.960317e-6 weeks <br />1.1415e-6 months <br /> fire rated barrier.

and Separation Criteria: ' Exemption Number 3.4 justifies the existance of unprotected structural steel in a nortion of the 3-hour fire rated barrier.

On this basis, this fi 4 oreo complies with Appendix R.

l DC-8S-16 3-10 Rev.I f TENERA h CORPORATKW t

_. - . . _ . . . , _ , _ , . - . __.m. -. . ._ _ _ _

FIRE HAZARDS ANALYSIS Building: Ten Room (Fire Area): Walkover Structure (T-6)

Elevation: 4791'-0" 481l' 4829' Safety Related: Yes Construction North Wall: Heavy metal plate tack welded East Wall: 12" reinforced concrete South Wall: Heavy metal plate tack welded West Wall: 12" reinforced concrete Ceiling: Concrete on metal pan Floor: Concrete Drainoge: No Ventilation: No - Mechanical HVAC is provided for the fire alarm panel room on el. 4829' Fire Detection: Yes - lonization throughout the area Fire Protection: No automatic fire suppression or fire extinguishers provided Emergency Lighting: Yes - However, not in the form of sealed beam, 8-hour battery pack units. The normal lighting system will be connected to the ACM diesel, and the emergency lighting system is backed up by the battery iC and a diesel generator.

No manual actions are required within Building 10 for post-fire shutdown. Therefore,8-hour battery pock lights are not required.

Required Fire Protection F.P. Shutdown Train A: Cables 143 and 1157 for instru-Shutdown Components ment / control power A. ,

in Fire Area: F.P. Shutdown Train B: Cables 144 and i158 for instru-ment / control power B.

l Area (sq. ft.): 198 l

Fire Hazard (BTU /sq. ft.): Negligible l

Fire Hazard Classification: Low; Transient fire only Compliance With Cables 143 and 1157 are wrapped in a 1-hour fire Appendix R (Sect. Ill.G) rated barrier and considered part of fire area T-5.

and Separation Criteria: The 1-hour fire area boundary is considered sufficient because of the negligible fire load. Additionally, fire detection system coverage is provided. On this basis, and in accordance with the guidelines of Generic Letter 85-01, this fire area is judged to be in

~

compliance with Appendix R.

_ - _ _ _ - _ _ MEkN?

3.4 STRUCTURAL STEEL a r 3.4.1 General During a Telecon on July 26,1985, with IAr. Dennis Kubicki of the NRC, several questions were raised for resolution. One of these dealt with the adequacy of

, unprotected structural steel in Building 10 fire creas that do not have automatic fire suppression system coverage.

Building 10 is composed of six(6) separate fire areas. Each fire area comprises one 'or more rooms. Those that have automatic fire suppression include the following:

ROOM FIRE AREA Inverter Room I-A T-5 ,

l Inverter Room I-B T-3

Mezzonine I-C T-3 Battery Room I-C T-4 Computer Room North T-2 Computer Room South T-2

. Electrical Equipment Room T-2 O The balance of Building 10 does not have automatic fire suppression coverage and this includes; the training / office rooms in fire area T-1, the wolkover structure (T-6), and the computer services office in fire area T-2. Hence, only these three specific areas need to be specifically evoluoted for the acceptability of unprotected structural steel, based on Exemption Request 3.4.

3.4.2 Evoluotion The fire food (see section 2.0) for fire areas T-l and T-2 was determined to be 4

less thon'45 minutes (low) and, for the wolkover structure (T-6), it. was 15 minutes or less. In none of these orcos were there any concentrated fire foods or fire hozordous equipment located odjacent to structural steel members. Finally, the type of fire expected would only include ordinary combustibles, office materials, and/or a transient fire load.

4 O

DC-85-16 3-15 TENERA h CORPORATKh'

The training / office room (fire crea T-1) has 3-hour fire rated reinforced

% concrete walls, floor, and ceiling. There is no unprotected steel in this fire oreo except for the concealed ceiling space. The wolkover structure (fire crea T-6) has three levels, each with unprotected steel. Also, the north and-south walls are unprotected steel with metal siding. The computer services office (fire area T-2) hos walls composed of either reinforced concrete or 8-inch concrete block.

The floor is file over concrete. There is unprotected steel in the ceiling.

The training / office room (T-1) has unprotected structural steel in the ceiling space, but the non-combustible, mineral tile, suspended ceiling shields this from the room space. Also, the training office room does not have any safety related cables / equipment. There are no concentrated fire foods, fire hozordous equip-ment or storage, and this room has a low fire load. Therefore, no concern exists for structural steel in this fire oreo.

Regarding the wolkover structure (T-6), there is essentially a negligible fire lood and only a transient fire would pose the single largest hozord. All floor levels arm open to each other ond, hence, the wolkover structure volume serves os o

" heat sink". The structural members are substantial in size and assuming no fire suppression efforts, on unmitigated fire would only raise the steel's temperature by a marginal amount due to the low fire food, and would not cause structural failure.

The computer services office (T-2) also has a low fire lood with no special fire hozords. Since the floor hos a 3 hour3.472222e-5 days <br />8.333333e-4 hours <br />4.960317e-6 weeks <br />1.1415e-6 months <br /> fire rating, then the safety related equipment below is protected. With the low fire load, a fire would not domoge or weaken the ceiling steel supports above the computer services office. Since l

no fire protection shutdown equipment is located therein, fire protection shutdown is not threatened.

i 3.4.3 Conclusion Regarding Unprotected Structural Steel For areas where unprotected structural steel exists coupled with a lock of automatic fire suppression system, it has been determined to be on occeptable condition based upon the following:

o -

DC-85-16 3-16 Tm= O c===

l l

i

1. Iow and/or transient fire foods; .

i

2. obsence of concentrated fire loods;

3. obsence of fire hozordous equipment; and ,

4. obsence of fire protection shutdown equipment in all areas except for the wolkover structure.

Therefore, because of the above, it is not necessary to provide the unprotected l

structural steel with either automatic fire suppression system coverage or fire rated barriers.

4 1

b l

)

1 i

l DC-85-16 3-17 mm o c===

-. . . . _ . .-. . - . ._. _. . - . - . . -