ML042790373
| ML042790373 | |
| Person / Time | |
|---|---|
| Site: | Browns Ferry  |
| Issue date: | 05/17/2004 |
| From: | Tennessee Valley Authority |
| To: | Office of Nuclear Reactor Regulation |
| References | |
| Download: ML042790373 (1) | |
Text
BFN Flows Flow Comments Flow Comments Comments Now (Units 2 & 3 only)
Total intake (all uses) for Units 2 & 3 3270 cfs or 2114 MGD (1635 cfs per unit or 734,000GPM)
Intake flow based on annual flow tests conducted from 1998 thru 2002 3184 cfs or 2058 MGD (1592 cfs per unit or 714,000GPM)
Intake flow based on non-tower flow (i.e., 3270 cfs) reduced by 43 cfs per unit, due to higher headlosses in the CCW system created by tower operation 3184 cfs or 2058 MGD (1592 cfs per unit or 714,000GPM)
Intake flow based on non-tower flow (i.e., 3270 cfs) reduced by 43 cfs per unit, due to higher headlosses in the CCW system created by tower operation Total Discharge 3270 cfs or 2114 MGD Discharge flow is equivalent to the intake flow reduced by the non-tower consumptive use and tower evaporation 3130 cfs Discharge flow is equivalent to the intake flow reduced by the non-tower consumptive use and tower evaporation 3122 cfs Discharge flow is equivalent to the intake flow reduced by the non-tower consumptive use and tower evaporation Diffuser discharge average velocity 9.6 fps Based on flow thru two diffusers, each containing 7800 ports of diameter 2 inches (note: for two-unit open mode, it is assumed that the flow from each unit is isolated to its diffuser, so that only two diffusers are in service) 6.1 fps Based on flow thru three diffusers, each containing 7800 ports of diameter 2 inches (note: for two-unit helper mode, it is assumed that the return flow from the cooling towers is routed evenly thru all three diffusers) 6.1 fps Based on flow thru three diffusers, each containing 7800 ports of diameter 2 inches (note: for two-unit helper mode, it is assumed that the return flow from the cooling towers is routed evenly thru all three diffusers)
Non-tower consumptive use 0 cfs Non-tower consumptive use is negligible 0 cfs Non-tower consumptive use is negligible 0 cfs Non-tower consumptive use is negligible Max tower intake 0 cfs No tower operation 2940 cfs Operation of exiting 5 towers 2940 cfs Operation of exiting 5 towers Max tower discharge 0 cfs No tower operation 2886 cfs Operation of exiting 5 towers 2878 cfs Operation of exiting 5 towers Tower makeup (evaporation) 0 cfs No tower operation 54 cfs Evaporation for existing 5 towers at 105% PU 62 cfs Evaporation for existing 5 towers at 120% EPU 3-Unit operation Total 3 unit intake 4907 cfs or 3171 MGD Intake flow for 3-unit operation is estimated as 1.5 x intake flow for 2-unit operation (i.e., 1.5 x 2114 MGD) 4778 cfs or 3088 MGD Intake flow based on non-tower flow (i.e., 4907 cfs) reduced by 43 cfs per unit, due to higher headlosses in the CCW system created by tower operation 4778 cfs or 3088 MGD Intake flow based on non-tower flow (i.e., 4907 cfs) reduced by 43 cfs per unit, due to higher headlosses in the CCW system created by tower operation Total discharge 4907 cfs or 3171 MGD Discharge flow is equivalent to the intake flow reduced by the non-tower consumptive use and tower evaporation 4707 cfs Discharge flow is equivalent to the intake flow reduced by the non-tower consumptive use and tower evaporation 4696 cfs Discharge flow is equivalent to the intake flow reduced by the non-tower consumptive use and tower evaporation Diffuser discharge average velocity 9.6 fps Based on flow thru three diffusers, each containing 7800 ports of diameter 2 inches (note: for three-unit open mode, it is assumed that the flow from each unit is isolated to its diffuser, so that all diffusers are in service) 9.2 fps Based on flow thru three diffusers, each containing 7800 ports of diameter 2 inches (note: for three-unit helper mode, it is assumed that the return flow from the cooling towers is routed evenly thru all three diffusers) 9.2 fps Based on flow thru three diffusers, each containing 7800 ports of diameter 2 inches (note: for three-unit helper mode, it is assumed that the return flow from the cooling towers is routed evenly thru all three diffusers)
Non-tower consumptive use 0 cfs Non-tower consumptive use is negligible 0 cfs Non-tower consumptive use is negligible 0 cfs Non-tower consumptive use is negligible Max tower intake 0 cfs No tower operation 3725 cfs Operation 6 towers 3725 cfs Operation 6 towers Max tower discharge 0 cfs No tower operation 3654 cfs Operation 6 towers 3643 cfs Operation 6 towers Tower makeup (evaporation) 0 cfs No tower operation 71 cfs Evaporation for 6 towers at 105% PU 82 cfs Evaporation for 6 towers at 120% PU open mode 105% PU & 120% EPU 105% PU 120% EPU helper mode Assumes operation of existing 5 towers No tower operation No tower operation Assumes operation of 6 towers pnhopping@tva.com Item 3-10_BFN_flows_TVA_review.xls 5/17/04