ML21286A465

Amendment 29 to Updated Final Safety Analysis Report, Chapter 10, Table 10.6, Reactor Building Closed Cooling

ML21286A465
Person / Time
Site:	Browns Ferry
Issue date:	10/04/2021
From:	Tennessee Valley Authority
To:	Office of Nuclear Reactor Regulation
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BFN-26 Table 10.6-1 REACTOR BUILDING CLOSED COOLING WATER SYSTEM AND EQUIPMENT DATA RBCCWS Design Pressure/Temperature Piping - 150 psig/230F Equipment - 150 psig/200F Raw Cooling Water Type River Water Normal Design Inlet Temperature 90F Maximum Inlet Temperature 95F RBCCWS Heat Exchangers Number Provided 2/unit - 1 common spare Materials Tubes Admiralty - SS for RBCCW HX1A and HX1B only Tube Sheets Carbon Steel - SS for RBCCW HX1A and HX1B only Shell Carbon Steel RBCCWS Pumps Number Provided 2/unit - 1 common spare Materials Casing Cast Steel Impeller Bronze Shaft Heat Treated High Carbon or Alloy Steel

BFN-28 Table 10.6-2 REACTOR BUILDING CLOSED COOLING WATER SYSTEM HEAT EXCHANGER OPERATING CONDITIONS Number of HX's in Heat Transfer (Btu/hr X 106)/HX operation per unit Normal 15.75 2 Startup 15.96 2 Cooldown 11.10 2 Shutdown 3.31 2 Normal Flow (GPM)

Shell Side 1685 Tube Side 2550 Fluid Tube Side (river water) Additives to minimize corrosion Shell Side (demineralized water)

Additives to minimize corrosion Seismic Coefficients 1.0g horizontal 0.07g vertical

BFN-28 TABLE 10.6-3a REACTOR BUILDING CLOSED COOLING WATER SYSTEM HEAT LOADS (3952 MWt)

One Unit MODE OF SERVICE NORMAL OPERATION COOLDOWN SHUTDOWN STARTUP AC POWER FAILURE P(Pal) TinF ToutF P(Pal) TinF ToutF P(Pal) TinF ToutF P(Pal) TinF ToutF P(Pal) TinF ToutF No. of Total Total Total Total Total System Equipment Units 106Btu/hr Total GPM 106Btu/hr Total GPM 106Btu/hr Total GPM 106Btu/hr Total GPM 106Btu/hr Total GPM Fuel Pool Heatr 2 9 100 112 0.1 100 112 0.1 100 112 9 100 112 - -

Exchange 8.8 1500 1.0 167 1.0 167 8.8 1500 - -

Reactor Recirculation 2 10 100 115 10 100 115 - - 10 100 115 10 100 115 Pump and Motor 0.96 120 0.96 120 - - 0.96 120 0.96 120 Drywell Atmosphere 8* 16.8 100 110 15.0 100 110 16.8 100 110 16.8 100 107 15.0 100 110 Cooler 5.19 1038 6.4 1274 5.19 1038 5.19 1038 6.4 1274 Reactor Bldg. Equipment 1 1.5 100 125 1.5 100 125 - - 1.5 100 125 - -

Drain Tank Cooler 0.5 40 0.5 40 - - 0.5 40 - -

Drywell Equipment 1 1.5 100 125 1.5 100 125 - - 1.5 100 125 1.5 100 125 Drain Sump Cooler 0.5 40 0.5 40 - - 0.5 40 0.5 40 Sample Cooler 4 3 100 111 3 100 111 - - 3 100 111 - -

0.04 6.5 0.04 6.5 - - 0.04 6.5 - -

Cleanup Recirculating 2 10 100 120 10 100 120 10 100 120 10 100 120 - -

Pump Cooler 0.17 15 0.17 15 0.17 15 0.17 15 - -

Cleanup System 1 8 100 150 7.5 100 143 - - 5 100 171 - -

Nonregenerative Heat Exchanger 15.35** 610 12.7** 587 - - 15.35** 482 - -

Closed Cooling Water 2 4 90 102.4 0.75 90 110.2 0.1 90 104.2 4 90 102.5 0.1 90 107.3 Heat Exchanger Raw Cooling Water Loop - Tube Side 31.51 5100 22.2 2200 6.62 900 31.91 5100 7.8 900 Closed Cooling Water 2 12 118.7 100 5 118.9 100 1.5 110.4 100 10 119.7 100 2.1 110.9 100 Heat Exchanger CCW Loop - Shell Side 31.51 3369.5 22.2 2249.5 6.62 1220 31.91 3241.5 7.8 1434

• This number of drywell atmosphere coolers is the total number in operation which must provide cooling for heat loads listed with a 25 percent standby capability (two coolers and fans not in operation). Spare fans may be placed in service at operator discretion to provide additional margin.

There is a total of ten drywell atmosphere coolers located in each unit's drywell.

• • Heat transfer rate corresponds to an RWCU flow of 270 gpm. Increasing the flow up to the maximum of 340 gpm results in an additional heat load of 7 X 106 Btu/hr. Operation of RWU above 270 gpm depends on the ability of RBCCW to accommodate the added heat load.

BFN-28 TABLE 10.6-3b (Deleted)