ML21286A412

Amendment 29 to Updated Final Safety Analysis Report, Chapter 8, Figure 8.4, Normal Auxiliary Power System Key Diagram

ML21286A412
Person / Time
Site:	Browns Ferry
Issue date:	10/04/2021
From:	Tennessee Valley Authority
To:	Office of Nuclear Reactor Regulation
Shared Package
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References
Download: ML21286A412 (5)

Text

DIESEL GEN A

[::!A] BKR 1818 [1838]

CLOSED INTER TIE BKR 1824

[ 1644]

CLOSED CASA-I CASS-I DG\\/A-AI 2-21 I -4A [4A3]

TDPU.. I.3 SEC

(.NOTE 31 RELAY NUMBERS LOSS OF 4KV SHTDN BO voi. T AGE 27/ 0A[2703AJ A!ZS C¢

,..._ _ _.~-(T-Y-PI_C_A_L_)~

2-21 I -2A [2A3]

TDPU,. 4 SEC 27/SAY

[27/S3... Y}

TRIP ANO LOCKOUT SUPPLY BREAKERS 1614(1334]. 1716(1726]. TR!P ALL LOAD BREAKERS. (TRIP 43SA TO MANUAL)

ii w

.-----1BKRS 1614(1334], 1716[1726).

AND I 824 [I 844] TRIPPED DIESEL GEN A

[3A] AT SPEED DIESEL GEN A

[3A) VOL.Tio.GE IN ' SPEC "

CLOSE BKR 1818[1838)

FROM DIESEL GEN A [ 3A )

BKR 1818[18~8 CLOSED (T S: 10 SEC)

NOTE 2 MJTES,

I. UNIT 3 NUMBERS ARE IN BRACKETS (

].

2. THE TOTAL TIME FROM DETECTION OF DEGRADED VOL HGE BY THE 27 RELAYS TO THE CLOSING OF' THE DIESEL GENERATOR BREAKER MUST NOT EXCEED THE MAXIMUM TIME DELAY THAT IS ASSUMED IN THE FSAR ACCIDENT ANP.LYSIS.SEE FSAR SIO:CTION 6, 5 FM THIS AN/\\!.. YSIS.

3. THIS TIME DELAY ALLOWS FOR SHUTDOWN BOARD POWER SYSTEM ISOLATION AND VOLTAGE DECAY e!::FO~ - !HE OIES£L. G~ERA.!OP ftQF°Ak'FR 1818 CLOSE SIGNAL IS ISSUEO.

AMENDMENT 16 REACTOR BUILDING UNITS I, 2 !. 3 BROWNS FERRY NUCLEAR PLANT FINAL SAFETY ANALYSIS REPORT LOGIC DIAGRAM - DEGRADED VOLTAGE AND LOSS-OF-VOLTAGE RELAY CHANNELS FIGURE 8. 4-4