ML18022A341

Updated Final Safety Analysis Report (Ufsar), Amendment 27, 7.8 Table - Reactor Vessel Instrumentation

ML18022A341
Person / Time
Site:	Browns Ferry
Issue date:	10/05/2017
From:	Tennessee Valley Authority
To:	Office of Nuclear Reactor Regulation
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Text

BFN-18 TABLE 7.8-1 (Sheet 1)

REACTOR VESSEL INSTRUMENTATION

• Instrument Measured Variable Type Trip Setting Reactor vessel surface Thermocouple -

temperature Reactor Vessel top head Thermocouple -

surface temperature Reactor vessel top head Thermocouple -

flange surface temperature Reactor vessel surface Temperature -

temperature recorder Calibrated jet pump Flow -

flow transmitter Jet pump flow rate Flow -

transmitter

BFN-18 TABLE 7.8-1 (Cont'd)

(Sheet 2)

REACTOR VESSEL INSTRUMENTATION

• Instrument Measured Variable Type Trip Setting Calibrated jet pump flow Flow -

indicator Jet pump flow rate Flow -

indicator Calibrated jet pump flow Square root -

extractor Recirculation loop flow Flow summer -

rate Recirculation loop flow Flow -

rate indicator Core total flow Flow -

summer

• Other instruments measuring reactor vessel variables are discussed in sections of the Safety Analysis Report where the systems using the instruments are described.

• • Four level ranges with corresponding level trip settings.

BFN-18 TABLE 7.8-2 (Sheet 1)

PRIMARY CONTAINMENT MONITORING INSTRUMENTATION Instrument Range Instrument Location Trip Function Drywell Pressure Indication -15 to 65 psig Local and Control Room -

0-300 psig Drywell Pressure Recorder -15 to 65 psig Control Room Alarm on High Pressure 0-300 psig Drywell Temperature 0-400°F Control Room Local Alarm on High Temperature Indication (2)

Drywell Temperature Recorder 0-400°F Control Room Alarm on High Temperature Pressure Suppression Chamber Pressure 0-60 psig Local -

Indicator Pressure Suppression Chamber Pressure 0-60 psig Control Room -

Recorder Pressure Suppression Chamber Air 0-400°F Control Room -

Temperature Recorder Pressure Suppression Chamber Water -15" to +10" (U3) Control Room Alarm on High or Low Level Indication (Narrow Range) -25 to +25 (U2) Water Level Pressure Suppression Chamber Water Level 0-240" Control Room -

Indication and Recording (Wide Range)

BFN-18 TABLE 7.8-2 (Cont')

(Sheet 2)

PRIMARY CONTAINMENT MONITORING INSTRUMENTATION Instrument Range Instrument Location Trip Function Pressure Suppression Chamber Water 30°-230°F Control Room (2 Channels) Alarm on High Temperature Temperature Indication Local Drywell Flood Level 85' 4" above Control Room Alarm on High Level instrument penetration Drywell Equipment Drain Sump Level 0" to 40" above Local Alarm on decreasing level, sump floor on increasing level, and high fill rate Drywell Floor Drain Sump Level 0" to 40" above Local Alarm on decreasing level, sump floor increasing level, and high fill rate Drywell Sump Level (measured by 0-150 GPM Control Room -

integrated sump pump flow recording)

Leak Detection Monitor Low Level 10-106 cpm Local Alarm on High Radiation Radiation Oxygen analyzer* 0-25%** Control Room Alarm on High Oxygen 0-5% Concentration Postaccident Containment Atmosphere Monitoring System (1) High Level Radiation Recorder 1-107 R/Hr Control Room Alarm on High Radiation (2) Hydrogen Analyzer 0-20%** Control Room Alarm on High Hydrogen 0-100% Concentration

• Monitor will be used in normal operation and in postaccident monitoring.

• • Range can be selected.