The annular condenser would be formed by making a space between 

 the pressure hull and the inner cylinder. A 3/4-inch annular condenser would 

 allow for pressure hull deflections of 5/32 inch. The lower end may be rig- 

 idly attached, but the upper end should be attached with a flexible seal to the 

 hull to avoid loading the inner cylinder with sea pressure deflections of the 

 pressure hull. The hull condenser would be adequate sized for plants at depths 

 of 600 and 6,000 feet where the ambient seawater is 24°C. However, for 

 29°C seawater, the plant at 6,000 feet would have to operate at about 2/3 of 

 full power, and the plant at 600 feet would provide full power at 29°C. 



The freshwater cooling system, shown in Figure A-7, would provide 

 cooling for the air ejecter and gland exhaust condenser, air and lubricating 

 oil cooler for the turbine-generator set, reactor plant auxiliary systems, and 

 machinery spaces. Freshwater would be circulated through a water cooler 

 heat exchanger and then circulated to the various coolers. Heat would be 

 transferred from the freshwater to the shield water by a shield water circu- 

 lating system and then finally rejected from the shield water through the 

 pressure hull. The total freshwater heat load was estimated to be less than 

 250,000 Btu/hr. The shield water heat load was estimated to be less than 

 300,000 Btu/hr. 



pressure hull shield tank 



expansion tank 



air and lubricating oil cooler 

 for the turbine-generator set 



air ejecter and gland 

 exhaust condenser 



shield water 

 circulation pumps 



Figure A-7. Preliminary freshwater cooling system. 



102 



