a. A total source power requirement of 1.5 GW (10 GW Ground Power) was used for the base parameters in preliminary analysis. b. Voltage drop per feeder buss was chosen, buss area was calculated from the relationship where: = specific resistivity (= 2.83 ohmmeters a rroom temperature) I = total current L = buss length E = voltage drop (max drop at end of buss assuming uniform loading along length c. For secondary feeders area was calculated using average length of feeder. d. For tertiary feeders it was assumed that each unit area of equal power was divided into 64 subarrays. e. Subarray distribution assumes 100 tubes/subarray - with 20 busses feeding five tubes each. Results of this analysis are given in Figure 5-10, for the lateral, circular and radial flow patterns. Data shown in these figures are for an operating temperature of 293°K (20°C). Preliminary estimates of operating temperature indicated that temperatures could be between 400°K - 500°K (127°C - 227°C). Resistance versus temperature is given by: where = thermal coefficient of resistivity = 0. 0039 ohm - °C for aluminum
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