ML20062F955

Appl for Amend to Append a of Facil Oper Lic DPR-34,changing Tech Specs for Fire Protec Sys Re Halon Fire Suppression Sys & Smoke Detectors & Alarms for Control Room & Cable Areas & Fixed Water Spray Sys for Auxiliary Elec Room

ML20062F955
Person / Time
Site:	Fort Saint Vrain
Issue date:	12/11/1978
From:	Millen C PUBLIC SERVICE CO. OF COLORADO
To:
Shared Package
ML20062F953	List: ML20062F951 ML20062F955
References
NUDOCS 7812220069
Download: ML20062F955 (6)

Text

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BEFORE THE UNITED STATES NUCLEAR REGULATORY COMMISSION In the Matter of the Facility Operating Licenst )

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of ) Docket No. 50-267

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PUBLIC SERVICE COMPANY OF COLORADO )

Application for Amendment to Appendix A of Facility Operating License License No. DPR-34 OF THE PUBLIC SERVICE COMPANY OF COLORADO F0R THE FORT ST. VRAIN NUCLEAR GENERATING STATION This application for Amendment to Appendix A of Facility Operating License, License No. DPR-34, ,

is submitted for NRC review and approval.

( Respectfully submitted, PUBLIC SERVICE COMPANY OF COLORADO By --

• C. K. liillen, Senior Vice President KELLY, STANSFIELD & 0'DONNELL Bryant O'Donnell Robert E. Thompson Public Service Company Building Denver, Colorado 80202 l

Attorneys for Applicant j I

7812220069

Attochment 1 Specification LCO 4.10.2 - Halon Fire Suppression System, Three Room Control Complex, Limiting Condition for Operation The Halon Fire Suppiassion system for the control room, auxiliary electric room, and the 480 volt switchgear room shall be operable during reactor power operation. If the Halon system becomes inoperable and cannot be made operable within 72 hours8.333333e-4 days <br />0.02 hours <br />1.190476e-4 weeks <br />2.7396e-5 months <br />, the reactor shall be shutdown in an orderly manner.

Basis for Specification LCO 4.10.2 The Halon system provides fire suppression capability for the control roon, auxiliary elettric room, and the 480 volt switchgear room. Halon is a non-toxic, halogsnated c emical fire suppressant. The Halen system is a total flooding extinguishing system divided into three sections. One section supplies the 480 volt switchgear room, the second section supplies the control room, and the third the auxiliary electric toom. Total flooding of these areas with halon will extinguish an active fire without requiring abandonment of the area.

The auxiliary electric room Halon System Section is automatically initiated by the simultaneous actuation of a detector in zone #2 and #3 of Table 4.10-3; the 480 volt room Halon System Section is automatically initiated by the simultaneous actuation of a detector in fire detection zone #5 and #6 of Table 4.10-3.

The Halon System Section for the 480 volt switchgear room may be manually initiated by a switch located just outside the door of the room. The Halon System for the auxiliary electric room may be manually initiated by a switch .

located just outside of the room. The Halon System Section of the control room is manually initiated by a switch located in the control room. In the event ,

that electrical power is not available to initiate Halon System operation, each Halon storage bottle is provided with a manually operated release mechanism i

which will release the bottle contents when operated.

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Attachment 2 Specification LCO 4.10.3 - Smoke Detectors and Alarms for Three Room Control Complex and Congested Cable Areas, Limiting Condition for Operation The reactor stall not be operated at power unless the minimum number of smoke detectors for each of the zones listed in Table 4.10-3 are operable.

If the minimum number of detectors of each zone are not operable, the following actions shall be taken:

An individual shall.be designated to inspect the area or areas with inoperable detectors once per hour.

The inoperable detectors shall be made operable within thirty (30) days or the reactor shall be shut down in an orderly manner.

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Basis for Specification LCO 4.10.3 The smoke d'etection and alarm system provides detection and alarm capa-bility for the control room, auxiliary electric room, the 480 volt switch gear room, the congested cable areas located at the "G" and "J" column rows and selected reactor building HVAC return air ducts in various areas which are not normally manned.

In addition the system will automatically initiate operation of the Halon

• fire suppression system in the auxiliary electric room or the 480 volt switch- .

gear room upon actuation of a detector in both of the zones in each room.

The system alerts the operator to the possibility of a fire in the con-gested cable areas and to the necessity of investigation of conditions in these areas.

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- . - Atttchment 2 1

TABLE 4.10-3 SMOKE DETECTORS AND ALiRMS NUMBER OF MINIMUM NUMBER

ZONE DETECTOR,S OPERABLE

1) Control Room 6 4 3 2) Auxiliary Electric Room 3 2

3) Auxiliary Electric Room 3 2

4) Auxiliary Electric Room Return Air Duct 1 0*

5) 480 Volt Switchgear Room 3 2

6) 480 Volt Switchgear Room 3 2

7) Reactor Building "J" Wall Elevation

. Rev. 4756' to 4791' 4 2

8) Reactor Building "J" Wall Elevation 4791' to 4829' 4 2

9) Reactor Building "J" Wall Elevation 4829' to 4849' ' "

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10) Reactor Building "J" Wall Elevation 4849' to 4881' 2 1

11) Turbine Building "G" Wall Elevation i

4791' to 4811' 2 1

! 12) Turbine Building "G" Wall Elevation f

i 4811' to 4829' 2 1

13) Reactor Building HVAC Return Air Duct 1

at Elevation 4932' 1 1

14) Reactor Building HVAC Return Air Ducts 4 2

15) Reactor Building HVAC Return Air Duct 6 4

• To be returned to service as soon as practicable after loss of function. ,

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• Attachment 3 Specification LCO 4.10.5 - Fixed Water Spray Systems for the Auxiliary Electric Room. 480 Volt Switchgear Room, and Congested Cable Areas The fixed water spray systems providing supplementary fire protection

in the 480 volt switchgear room, auxiliary electrical equipment room, and con-gested cable areas of the reactor building side of the "J" vall and turbine building side of the "G" wall shall be operable during reactor power operation.

If the spray systems become inoperable and cannot be made operable within 168 hours0.00194 days <br />0.0467 hours <br />2.777778e-4 weeks <br />6.3924e-5 months <br />, the reactor shall be shut down in an orderly manner.

Basis for Specification LCO 4.10.5 The fixed water spray systems provide backup fire suppression in the congested j cable areas. In the 480 volt switchgear room and the auxiliary electric room, the systems are a backup to the installed Halon system. If the fixed water spray systems were inoperable, the smoke detectors and alarm system of LCO 4.10.3 would be available for detection and alarm of a fire. In all areas where it is installed the fixed water spray system is a backup to normal fire fighting techniques.

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• * - Attachment 4 Specification SR 5.10.6 - Fixed Water Spray System, Surveillance Requirement The manually operated valves actuating the fixed water spray system i

providing supplementary fire protection in the 480 volt switchgear room, auxiliary electric room, and congested cable areas shall be opened annually.

The flow path from the manual isolation valves to and including the spray nozzles shall be verified to be open annually.

Basis for Specification SR 5.10.6 7 Annual opening of the manually operated valves and verification of

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available flow path is sufficient to demonstrate capability to operate if required.

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