ML20217Q331

Proposed Tech Specs Pages 245 & 252,amending App a to Modify TS to More Clearly Describe Separation of Switchgear Room Into Two Fire Areas & Incorporate Specifications for New Low Pressure CO2 Suppression Sys

ML20217Q331
Person / Time
Site:	Vermont Yankee
Issue date:	08/22/1997
From:	VERMONT YANKEE NUCLEAR POWER CORP.
To:
Shared Package
ML20217Q329	List: BVY-97-106, Application for Amend to License DPR-28,amending App a to Modify TS to More Clearly Describe Separation of Switchgear Room Into Two Fire Areas & Incorporate Specifications for New Low Pressure CO2 Suppression Sys ML20217Q331
References
NUDOCS 9709030003
Download: ML20217Q331 (3)

Text

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Vermont Yankee Nuclear Power Corp.

Docket No.60-271 DVt 97106 ATTACHMENT 3 REVISED TECHNICAL SPECIFICATION PAGES h((0 p

DO OO 71 PDR,

VYNPS 3.,13 LIMITING CONDITIONS FOR 4.13 SURVEILLI ~'E REQUIREMENTS

. OPERATION

e. At least once per 3 years, partially open hose station valves to verify

._ valve operability and no blockage.

l D. CO, Systems D. CO, Systemn l

1. Except as specified in 1. The CO 2 systems located l Specification 3.13.D.2, in the cable vault, the CO2 systems located east and west in the cable vault, switchgear rooms, and

, east and west diesel fire pump day switchgear rooms, and tank room shall be diesel fire pump day demonstrated operable, tank room shall be operable, whenever a. At least once per equipment in the area six months by protected by the system verifying each CO 2 is required to be cylinder associated operable, with the cable vault and diesel

2. From and after the date fire pump day tank that the CO2 system in room CO 2 systems the cable vault or a does not contain switchgear room is less than 90% of inoperable, within one its initial cnarge, hour a fire watch shall P: established to b. At least once per inspect the location at 18 months by least once every hour, verifying that the provided that the fire system, including detection system is associat;d operable in accordance ventilation with 3.13.A. If the dampers, will fire detection system actuate is also inoperable, automatically to a within one hour a simulated actuation continuous fire watch signal, shall be established with backup fire c. At least once per suppression equipment, operating cycle a Restore the CO2 system flow path test to operable status shall be performed within 14 days or to verify flow submit a report within through each the next 30 days to the nozzle.

Commission as specified in 6.7.C.2 outlining d. At least once per ,

the cause of 7 days by verifying inoperability and the the CO 2 storage plans for restoring the tank associated CO2 system to operable with the switchgear status, rooms does not contain less than 50% level and a minimum pressure of 270 psig.

Amendment No. 44, 67, 147, 245

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-VYNPS BASES: .

3.13 &-4.13 FIRE PROTECTION SYSTEMS On May 11, 1976, Vermont Yankee received a letter from the NRC requesting that an in-depth evaluation of the existing fire prote; tion systems.be performed using Branch Technical Position (BTP) APCSB 9. 5-1 as a guide.. Concurrent with this evaluation a fire hazards analysis of the entire plant-complex was required. In an effort to clarify the BTP an Appendix A was subsequently issued to specifically address operating plants. Enclosed with this Appendix the NRC requested that proposed Technical Specifications on fire protection also be submitted. The subject section 3.13/4.13 and the following specific bases are those specifications evolving from these efforts.

A. The smoke, heat and flame detectors provide the early warning fire detection capability necessary to detect problems in vital areas of the plant. Surveillance requirements assure these sensors and their-associated instruments to be operable. When the equipment protected by the detectors ~is not required to be operable, specifications covering the sensors and instruments do not apply.

B,C, The Vital Fire Suppression Water System,.CO2 systems, sprinkler D,F, systems and foam systems specifications are provided to meet and pre-established levels of system operability in the event of a G fire. These systems provide the necessary protection to assure safe reactor shutdown. Periodic surveillance testing provides assurance that vital fire suppression systems are operable.

The east and west switchgear rooms low pressure CO 2 storage tank  ?

.Techn al Specification minimum level of 50% provides for suffi ant CO2 quantity to achieve and maintain design-concentration, in accordance with NFPA 12 (1993), in the east or west switchgear rooms. The Technical Specification minimum tank pressure of 270 psig will provide the minimum pressure to meet system design.

E.. Vital fire barrier penetration fire seals are provided to assure that the fire resistance rating of barriers is not reduced by a penetration. Surveillance inspections shall be performed to insure that the integrity of these seals is maintained.

The diesel fire pump has a design consumption rate of 18 gallons of fuel per hours' therefore, 150 gallons provides for greater than 8 hours9.259259e-5 days <br />0.00222 hours <br />1.322751e-5 weeks <br />3.044e-6 months <br /> of operation. Additional fuel can be delivered in about one hour and additional fuel is on site. When the equipment protected by the fire protection systems is not required to be operable, the specifications governing the fire protection system do'not apply.

Jaendment No. 44, 64, 252

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