A three-phase development program was suggested to advance the 

 state of the art in heat rejection systems for in-situ reactor power plants. A 

 milestone chart, budget costs, and program schedules for the heat rejection 

 systems development are shown in Figure 28. Phase I would entail a concept 

 formulation and trade-off analysis to develop criteria for the selection of the 

 most promising heat rejection designs. Two concept approaches to be 

 evaluated would be circulating seawater through hull penetrations and heat 

 removal through the hull structure. Effective ranges of both concepts would 

 be established to show the feasible upper limit of the hull transfer and the 

 lower limit of the seawater circulating systems. 



Months After Contract Award 

 6 8 



select most efficient heat rejection systems 



Phase I 



Concept formulation 



and trade-off analysis 



Phase 1 1 



Hull heat rejection concept, 



development study 



Phase III 



Hull penetration concept 



development study 



stress analysis 



concepts acceptable for 

 final design process 



pipe stress analysis; pipe compression techniques 



Phase Time (months) 



I) 



Cost ($1,000) 



65 

 95 

 120 



Can be concurrent 



Months After Contract Award 



Figure 28. (Vlilestone chart for heat rejection system development program. 



90 



