Air flow data

2 Air Plow Data. The reactor is. designed for normal Operation at a power level of 30,000 kw. The design aii flow of -2000 Ib/min and pressure drop of 55 in. of water through the reactor cooling-air system are based on maximum temperatures of 570°F in the graphite pebble bed and 500°F in the permanent graphite at 45,0OO- kw operation of the reactor. The. .2000-lb/niin 

Airflow through graphite Air to cool top thernal shield  

Allowed of leakage inward through ojqierinental holes, etc. 

Subsequent calculations gave the air req.uirements as 1526 Ib/min to cool the graphite, And experimental facilities, and 174 Ib/min to cool the top thermal shield, for a total air flow of 1700 Ib/min. Also, critical experiments conducted at ORNL indicated that the heat generation in the reflector would be somewhat less than that used for the above calculations and the air requirements would therefore be less. However, the design figures were maintained at 2000 Ib/min flow and 55 in. of water pressure drop since it may be desirable and possible to operate the reactor at a power level as high as 60,000 kw at some time in the future. 

The approximate pressure drops through the reactor air. system for a flow qf 2000 Ib/min are summarized in Table 8.1.A. 

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Shirotsuka et al. (Sll), 1957 Experiments on film flow in vertical channel, 8 cm. wide Nn = 100-1500 zero or countercurrent air flow. Data on local film thicknesses, wave heights, wave frequencies, increase in surface area due to rippling, with and without air flow. 

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