ML21286A372

Amendment 29 to Updated Final Safety Analysis Report, Chapter 7, Table 7.4, Automatic Depressurization System Instrumentation

ML21286A372
Person / Time
Site:	Browns Ferry   (DPR-033, DPR-052, DPR-068)
Issue date:	10/04/2021
From:	Tennessee Valley Authority
To:	Office of Nuclear Reactor Regulation
Shared Package
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Download: ML21286A372 (4)

Text

BFN-24 TABLE 7.4-1 (Deleted by Amendment 16)

BFN-24 TABLE 7.4-2 AUTOMATIC DEPRESSURIZATION SYSTEM INSTRUMENTATION Trip Setting/

ADS Function Instrument Type INSTRUMENT No.

Analytical Limit Reactor vessel low Level switch LS-3-58A - D 372.5 inches above water level vessel zero (AL) (Note 1)

Primary containment Pressure switch PIS-64-57A - D 2.6 psig (AL)

(drywell) high pressure Automatic depressurization Timer E-K34 & E-K35 120 seconds (AL) time delay LPCI pump discharge Pressure switch PS-74-8A & B, 19A & B 120 upper analytical limit pressure PS-74-31A & B, 42A & B 80 lower analytical limit Core spray pump Pressure switch PS-75-7, 16, 35, 44 205 upper analytical limit discharge Pressure 165 lower analytical limit Acoustic Monitor Accelerometer XE-1-5, 19, 22, 30, 31, 34 N/A High drywell pressure Timer 2-l-58A2 360 seconds (AL) bypass time delay for 2-1-58B2 ADS logic 2-1-58C2 2-1-58D2 Note 1: LIS-3-184 and -185 provide confirmatory low level signals.

BFN-24 TABLE 7.4-3 CORE SPRAY SYSTEM INSTRUMENTATION Trip Setting/

Core Spray Function Instrument Type INSTRUMENT No.

Analytical Limit (AL)

Reactor vessel low Level switch LS-3-58A - D 372.5 inches above water level vessel zero (AL)

Primary containment Pressure switch PIS-64-58A - D 2.6 psig (AL) high pressure Reactor vessel low Pressure switch PIS-3-74A & B 335 psig (AL) pressure PIS-68-95 & 96 Core spray sparger Differential PDIS-75-28 & 56 2.0 psid differential pressure pressure switch Pump discharge flow Flow indicator FI-75-21 & 49 Pump suction pressure Pressure PI-75-4, 13, 32, 41 Pump discharge pressure Pressure PI-75-20 & 48 Pump discharge flow Flow switch FS-75-21 & 49 2584.8 gpm increasing 2211.2 gpm decreasing

BFN-24 TABLE 7.4-4 LOW PRESSURE COOLANT INJECTION INSTRUMENTATION Instrument Instrument Trip Setting/

LPCI Function Type Number Analytical Limit (AL)

Reactor vessel low water Level switch LS-3-58A - D 372.5 inches above level (LPCI pump start signal) vessel zero (AL)

Primary containment Pressure switch PIS-64-58A - D 2.6 psig (AL)

(drywell) high pressure (LPCI initiation)

Reactor vessel low water Level switch LIS-3-52 & 62-A 293 inches above level (inside shroud) vessel zero (AL) prevents containment spray LPCI sequence delay (pump A)

Timer 0.2 seconds LPCI sequence delay (pump B)

Timer 7 seconds LPCI sequence delay (pump C)

Timer 14 seconds LPCI sequence delay (pump D)

Timer 21 seconds LPCI reactor vessel low pressure Pressure switch PIS-3-74A & B 335 psig (AL)

PIS-68-95 & 96 LPCI injection valve initiation Timer 10A - K45A & B 5 minutes signal cancellation Containment spray valve Pressure switch PIS-64-58E, F, G, and H 1 psig p 2.6 psig manual control interlock (AL) low drywell pressure LPCI pump low flow Flow switch FS-74-50 & 64 1000/8000 gpm (AL)

Reactor vessel Pressure switch PS-3-74A & B 200 psig (AL) pressure permissive PS-68-95 & 96