ML19344A668

Proposed Tech Spec Changes to Sections 2.19 & 3.15 Re Requirements for Operation & Surveillance of Halon Fire Suppression Sys

ML19344A668
Person / Time
Site:	Fort Calhoun
Issue date:	08/18/1980
From:	OMAHA PUBLIC POWER DISTRICT
To:
Shared Package
ML19344A662	List: ML19344A661 ML19344A666 ML19344A668
References
NUDOCS 8008210422
Download: ML19344A668 (4)

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' 12.0. ~ LIMITING CONDITIONS FOR OPEph.~0N

.19 LFire Protection System (Continued)

LThe' fire hose staticas designated in Table 2-8 shall be oper-

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(6) able.1With a hose statioiinoperable, provide a hose of equiva-

' lent:capasity which can service'the unprotected areas frem an

- , / operable hose'staticn withia one hour from the time that a hose e

station is determined to be inoperable.'

-(T) LAll' penetration fire inrriers protecting safety related areas

.v 'shall' be functional .(intact). With a-penetration fire barrier non-functionalJ a continuous fire watch shall be established

on one" side of the affected' penetration within one hour. -

.(8) The.switchgear room halca system shall be. operable with the stor-

. age tanks having at least.90% of full charge pressure and 95% of

. full' charge weight or. level. With a halon system inoperable, establish an' hourly fire watch with. backup fire suppression equipment. Restore the system to operable status within ik

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. days, or prepare and sub:.it a report to the Nuclear Regulatory Commission, pursuant to Section 5 9 3 of the Technical Specifi-cations, within an additional 30 days, outlining the cause of the inoperability and the plans for restoring the system to operable status.

Basis The fire protection system pr: tides a'means for detecting, alarming,

'and extinguishing plant fires. The system is divided into the fire detection / subsystem and fire +.mtinguishing subsystem.

The fire ~ detection subsystem is an instrumentation system which alarms control room operators of a fire, indicating fire location on a panel

-in the centrol room and providing a local indication from the detector

.in:the affected zone.

. The' fire extinguishing system includes the sprinklers which protect the

' Diesel Generator Rooms. Also included are the hose stations which pro-tect the immediate_ vicinity outside the entire plant, hose cabinets in-side;the intake structure, and other miscellaneous equipment.

Specir. Nation 2.19(2); allows cae_ of the four fire detection zones to be rinoperile- in the containment. One inoperable zone would not signi-Kficantly reGee ; fire detection capability or margins of safety or pro-

.tection forithe 'following reasons:

(1) ' JA large number of fire detectors at many locations and eleva-

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Ltions exist'in the containment vessel.

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'(2)~ 'During normal operation, containment fans provide complete circulation 1and mixi.g of containment air,zthereby exposing most of the ' containment fire detectors to any locally pro-

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duced!co=bustion prc'.uct3.

j-(3) I Normally, cantainment vantilation duct fire detectors are.

operable and areLcontinuously exposed to air streams origi-J >

.-natingLfrom.all locar bns~in the -ontainment.

Amendment No. 38: ..

'2-92 ATTAC E NT A

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"i8008210M22 i

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2. 3. 0 - SURVEILLANCE REQUIREMENTS'

.3.15~ : Fire' Protection System _(Continued)"

,. (6) .The diesel. fire pump shall be demonstrated OPERABLE:

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- a .. . At 'least'once - per: month' _by verifying that the fuel stor-age tank?contains.at least 200 gallons of fuel.

,b., At .least once per: quarter by verifying that a sample of diesel' fuel .from the - fuel' storage tank,' obtained-in ac-M cordance with' ASTM-D270-65, is within the acceptable-limits specified in Table 1 of ASTM-D975-Th with res-c pect. to'viscositys vaier centent and sediment.

L c. . 'At least-once per 18 months,..during shutdown, by sub-jecting the dieselLto an, inspection in accordance with

. procedures prepared in conjunction with its manufacturer's ,

recommendations for the class of service.

_(7)J :The fire pump diesel starting 2k-volt battery bank and charger

- 4 shall be demonstrated OPERABLE:

a. At least once per month by verifying that the electrolyte level of each battery is above the plates.

-b. At least once per quarter by verifying that the specific gravity _ is appropriate -for continued service of the bat-tery,

c. At least.once per 18 months by verifying that:

'l. The batteries and battery. racks show no visual in-

'dication of physical damage or abnormal deteriora-

• tion.

-2. . The battery-to-battery and terminal _ connections are

. clean, tight, = essentially free of corrosion and suit-

~a ble corrosion protection is used.

(8). The switchgear room halon system shall be -demonstrated to be

. operable:

a.- .i At least .once per month by veritying that each valve in the flow path is in its correct position.

' b . -- 1 At least once _ every 6 months by verifying each halon st'orage tank pressure and weight.or_ level.

c. -At;1 east once every_18 conths by:

. l. cVerifying the system,. including associated ventila-tion dampers'(if applicable), is actuated by a simu--

~ ;1ated_ test-signal.' ' Manual and automatic test signals ,

_ vill.be alternated every 18 months. l

-e Visual-inspection of spray headers to verify integrity.

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.. Amendment 4No.: 38:; 3-82:

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-a 3.0 SURVEILLANCE REQUIRDIENTS 3.15 Fire Protection System (Continued) 3 Visual inspection of all nozzles to ensure no blockage.

d. At least once every three years by performing an air flow test through each header and nozzle to assure no blockage.

Basis The fire protection system provides a means for detecting, alarming, and extinguishing plant fires. The system is divided into the fire detection subsystem and fire extingaishing subsystem.

The fire detection subsystem is an instrumentation system which alarms control room operators of a fire, indicating fire location on a panel in the control room,- and providing local indication frem the detector in the affected zone.

The fire extinguishing system includes the sprinklers which protect the Diesel Generator Rooms. Also included are the hose stations which pro-tect the i= mediate vicinity outside the entire plant, hose cabinets in-side the intake structure, and other miscellaneous equipment.

Maintaining the operability of the fire protection system under various operating conditions is essential to insure the integrity of various nuclear safety related plant syste=s and equipment. The above sur-veillance measures aid in accomplishing this objective.

Specification 315(2)f. provides a surveillance program that insures that silt and other material in the river water will not prevent the delivery of water to areas protected by fire water suppression systens.

Amendment No.'h0~ 3-83^

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DISCUSSION In accordance with-Section 3.1.8 of the Concission's' Safety Evaluation Report (SER) for the Fort Calhoun Station fire pro-tection progray, the Omaha Public Power District will have a halon

system installed, as noted in the proposed specificiations, in October, 1980. The preposed specifications specify limiting con-

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ditions for operation and surveillance measures for the halon sys-tem to be installed in the switchgear room.

The specifications require that the halon system be maintained in operable, status with storage tanks having at least 90% of full charge pressure and 95% of full charge weight or level. This requirement ensures that .the system contains an adequate supply of halon. In addition, the specificacions provide assurance that system operability.is =aintained by requiring that system pressure and tank veight or level te verified.tvice a year, that autonatic and manual test signals be introduced, and that visual inspections and air flow tests be conducted at a prescribed frequency. These spec-

'ifications, if implemented, vould not be inimical to the health and safety of the public.

1 ATTAC&iE*IT B s

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