ML21286A397

Amendment 29 to Updated Final Safety Analysis Report, Chapter 7, Table 7.12, Process Radiation Monitoring Systems Characteristics

ML21286A397
Person / Time
Site:	Browns Ferry
Issue date:	10/04/2021
From:	Tennessee Valley Authority
To:	Office of Nuclear Reactor Regulation
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Text

BFN-16 Table 7.12-1 PROCESS RADIATION MONITORING SYSTEMS CHARACTERISTICS Instrument Range Instrument Upscale Trips Downscale Trips Monitoring System (1) Scale per Channel per Channel Main Steam Line 1-106mr/hr 6 Decade log 1 1 Air Ejector Offgas Pre-Treatment 1-106mr/hr 6 Decade log 2 1 Air Ejector Offgas Post-treatment 10-1 to 106 7 Decade log 3 1 counts per second Main Stack 10-1 to 106 7 Decade log 2 1 counts per second(2)

Liquid Process 101 to 106 5 Decade log 1 1 (Off-line Monitor) counts per minute(2)

Reactor Building Ventilation -

Reactor Zone 0.1 to 1E+3 mr/hr 4 Decade log 1 1 Reactor Building Ventilation -

Refuel Zone 10 to 1E+6 mr/hr 5 Decade log 1 1 Plant Ventilation 10-106 counts/minute Digital Display 1 1 Exhaust (1) Range of measurements is dependent on items such as the source geometry, background radiation, shielding, energy levels, and method of sampling.

(2) Readout is dependent upon the pulse height discriminator setting.

BFN-16 Table 7.12-2 (Deleted by Amendment 13)