ML20148F238

Corrected TS Bases Page B 3/4 1-3 That Incorporates Changes from COLR & Elimination of Containment Spary Additive Sys TS Amends

ML20148F238
Person / Time
Site:	Farley
Issue date:	05/27/1997
From:	SOUTHERN NUCLEAR OPERATING CO.
To:
Shared Package
ML20148F225	List: ML20148F220 ML20148F238
References
NUDOCS 9706040183
Download: ML20148F238 (2)

Text

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g REACTIVITY. CONTROL' SYSTEMS l

BASES BORATION SYSTEMS (Continued)

With the RCS temperature below 200*F, one injection system is acceptable without single failure consideration on the basis of the stable reactivity condition of the reactor and the additional restrictions prohibiting CORE ALTERATIONS and positive reactivity changes in the event the single injection system becomes inoperable. l 1

Tho' limitation for a maximum of one centrifugal charging pump to be OPERABLE and the Surveillance Requirement to verify all charging pumps except i the required OPERABLE pump'to be inoperable below 180*F provides assurance that l a mass addition pressure transient can be relieved by the operation of a single )

RHR relief valve. l The boron capability required below 200*F is sufficient to provide a ]

SHUTDOWN MARGIN as specified in the COLR after xenon decay and cooldown from

'200*F to 140*F. This condition requires either 2,000 gallons of 7000 ppm borated water from the boric acid storage tanks or 7,750 gallons of 2300 ppm borated water from the refueling water storage tank. ,

I l The contained water volume limits include allowance for water not avai'able because of discharge line location and other physical )

cha.acteristics.

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The limits on contained water volume and boron-concentration of the RWST also ensure a pH value of between 7.5'and 10.5 for the solution recirculated' l-within. containment after a LOCA. This pH band minimizes the evolution of iodine and minimizes the effect of chloride and caustic stress corrosion on mechanical systems and components.

( The OPERABILITY of one boron injection system during REFUELING ensures

that this system is available for reactivity control while in MODE.6.

I 1 3/4.1.3 MOVABLE CONTROL ASSEMBLIES The specifications of this section ensure that (1) acceptable power distribution limits are maintained, (2) the minimum SHUTDOWN MARGIN is maintained, and (3) limit the potential effects of rod misalignment on associated accident analyses. OPERABILITY of the control rod position indicators is required to determine control rod positions and thereby ensure compliance with the control rod alignment and insertion limits.

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9706040183 970527 PDR ADOCK 05000340

P PDR g t

FARLEY-UNIT 1 B 3/4 1-3 AMENDMENT NO. 123 CORRECTED BY NRC LETTER DATED l

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o. REACTIVITY CONTROL SYSTEMS BASES' l BORATION SYSTEMS (Continued)  :

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, With the RCS temperature below 200'F, one injection system is acceptable i 4 without single failure consideration on the basis of the stable reactivity

j. condition of the reactor and the additional restrictions prohibiting CORE ALTERATIONS and positive reactivity changes in the event the single injection system becomes inoperable.

The limitation for a maximum of one centrifugal charging pump to be OPERABLE and the Surveillance Requirement to verify all charging pumps except the required OPERABLE pump to be inoperable below 180*F provides assurance that i a mass addition pressure transient can be relieved by the operation of a single d-RHR relief valve.

The boron capability required below 200'F is sufficient to provide a SHUTDOWN MARGIN as specified in the COLR after xenon decay and cooldown from 200*F to 140*F. This condition requires either 2,000 gallons of 7000 ppm borated water from the boric acid storage tanks or 7,750 gallons of 2300 ppm borated water from the refueling water storage tank.

The contained water volume limits include allowance for water not available because of discharge line location and other physical characteristics.

. The limits on contained water volume and boron concentration of the RWST

.also ensure a pH value of'between 7.5 and 10.5 for the solution recirculated l

. within containment after a LOCA. This pH band minimizes the evolution of iodine and minimizes the effect of chloride and caustic stress corrosion on mechanical systems and components.

L 1

The OPERABILITY of one boron injection system during REFUELING ensures

that this system is available for reactivity control while in MODE 6.

314.1.3 MOVABLE CONTROL ASSEMBLIES The specifications of this section ensure that (1) acceptable power distribution limits are maintained, (2) the minimum SHUTDOWN MARGIN is maintained, and (3) limit the potential effects of rod misalignment on associated accident analyses. OPERABILITY of the control rod position indicators is required to determine control rod positions and thereby ensure compliance with the control rod alignment and insertion limits.

FARLEY-UNIT 2 B 3/4 1-3 AMENDMENT NO. 118 CORRECTED BY NRC LETTER DATED l w