ML18022A329

Updated Final Safety Analysis Report (Ufsar), Amendment 27, 7.5 Table - Neutron Monitoring System

ML18022A329
Person / Time
Site:	Browns Ferry
Issue date:	10/05/2017
From:	Tennessee Valley Authority
To:	Office of Nuclear Reactor Regulation
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BFN-22 Table 7.5-1 SRM TRIPS Trip Function Trip Action SRM upscale or inoperative Annunciator, amber light SRM upscale or inoperative Display, amber light, rod block SRM downscale (detector Bypass detector limit switch retraction permissive)

SRM downscale Annunciator, white light, rod block SRM downscale Display, white light SRM period Annunciator, amber light SRM period Display, amber light SRM retraction permissive Display, white light SRM bypassed Display, white light Table 7.5-2 IRM TRIPS Trip Function Trip Action IRM Hi-Hi or inoperative Scram IRM Hi-Hi or inoperative Annunciator, red light IRM Hi-Hi or inoperative Display, red light IRM upscale Rod block IRM upscale Annunciator, amber light IRM upscale Display, amber light IRM downscale Rod block (exception on most sensitive scale)

IRM downscale Annunciator, white light IRM downscale Display, white light IRM bypassed Display, white light

BFN-22 Table 7.5-3 LPRM TRIPS TRIP FUNCTION TRIP RANGE TRIP SETPOINT TRIP ACTION LPRM downscale 2% to full scale 3%

Light and annunciator annunciator LPRM upscale 2% to full scale 100%

Light and annunciator LPRM bypass Manual Switch N/A Light and annunciator and APRM, averaging compensation Table 7.5-4a APRM TRIPS (Unit 1 at 105% Power Uprate Conditions)

TRIP FUNCTION TRIP POINT RANGE NORMAL SETPOINT ACTION APRM downscale 0% to full scale 3%

Rod Block APRM thermal power Varied with flow See Core Operating Rod Block upscale (high)

Limits Report APRM thermal power 7% to 27%

12%

Rod Block upscale (in startup)

APRM inoperative N/A Not in operate, critical Rod Block self-test fault, or too few LPRM detectors APRM thermal Varied with flow 0.55 Flow Scram power upscale

+ 60.5%

flow biased adjustable (high-high)

APRM inoperative N/A Not in operate or Scram critical self-test fault APRM upscale 10% to 30%

15%

Scram (in startup)

APRM upscale 10% to full scale 120%

Scram Fixed trip (high-high)

BFN-22 Table 7.5-4b APRM TRIPS (Units 2 and 3)

TRIP FUNCTION TRIP POINT RANGE NORMAL SETPOINT ACTION APRM downscale 0% to full scale 3%

Rod Block APRM thermal power upscale (high)

Varied with flow See Core Operating Limits Report Rod Block APRM thermal power upscale (in startup) 7% to 27%

12%

Rod Block APRM inoperative N/A Not in operate, critical self-test fault, or too few LPRM detectors Rod Block APRM thermal power upscale flow biased (high-high)

Varied with flow 0.66 Flow + 66% adjustable Scram APRM inoperative N/A Not in operate or critical self-test fault Scram APRM upscale (in startup) 10% to 30%

15%

Scram APRM upscale Fixed trip (high-high) 10% to full scale 120%

Scram

BFN-22 Table 7.5-4c (Deleted by Amendment 19)