ML22194A280

2 to Updated Final Safety Analysis Report, Figure 7.2-1, Sheet 5, Functional Diagrams Primary Coolant System Trip Signals

ML22194A280
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Site:	Summer
Issue date:	06/27/2022
From:	Dominion Energy South Carolina
To:	Office of Nuclear Reactor Regulation
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Text

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t-(JTES TI,E SETPO I NT OF THE UNCERVOU AGE RG.AY'., 'A-01.U' BE ACJUS T ABlf BETWEEN 60% ANC 80% OF t-(JM I NAL

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VCl.TAGE.

111TH THE AIJJUSTAllLE TIM£ CELAY SET TO I TS MINll>(JM VALUE.

THE UNCERVCl. TAGE DETECTOR SHJ\A.C HAVE A TIME RESPCNSE OF LESS THAN O 2 SECONCS.

THE AC.JUST ABLE DELAY SKll_O ALLOW AN ACCITtONAl. INTENTIONAL CELAY BETIIEEN OTO 1.0 SECONC.

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THE SETPGINT OF THE i.J'40ERFREQUENCY RELAYS SH()Ji.C BE ADJUSTABLE BETl'IEEN 54 Hz ANC 59 Hz WI TH THE

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i I 1 ACJUSTABLE Tl~ CELAY SET TO I TS MINIMUM VALUl THE UNJERFREQJENCY DETECTOR SHOULC HAVE A Ti ME RESPONSE OF LESS THAN O. 2 SECONDS THf ADJUST ABl f CELAY SliCIJLC ALLOI': AN AOCITIONAL INTENTIONAL DELAY BETl'IEEN O TO O. 5 SEC();CS

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THE MAX IMl-"1 AU..OWABLE RCP BREAKER TR IP TI ME Dfl.AY IS 0.1 U ON DS IT=:}

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'HE UNOEl".VOLTAGE SENSORS (POTENTl~c TRAN5FORMER5) MU'.,T BE cOcATED ON TME MOTOP 510E OF THE ~CP CIRCUIT BREAKER, TO DETECT THE TRIP OF THE RCP CIRCUIT BREAKERS IN ADDITION Tv BUS UNDERVOL.TAGE.

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THE UIIDERFREQUft.CY SENSORS MA'( BE LOCATED ON,KE MOTOR SIDE OF THE RCP CIRCUIT BREAKERS.

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SOUTH CAROLINA ELECTRIC & GAS CO.

VIRGIL C. SUMMER NUCLEAR STATION Functional Diagrams Primary Coolant System Trip Signals (Sheet 5 of 15)

(Dwg.No. 108D837 Sh. 5)

Figure 7.2-1