4. There are no quantitative or analytical data that could be applied to the 

 design of the pressure vessel facilities to eliminate the possibility of vessel 

 failure because of internal implosion. Qualitative observations of implosions, 

 however, have shown that the shock waves unleashed by implosions are of 

 such magnitude that they must be considered in safe vessel design. 



Recommendations 



1 . Conceptual designs of the stacked-ring and multilayer vessels should be 

 prepared and quotations on their fabrication should be solicited. The stacked- 

 ring and multilayer vessel concepts are in the opinion of the study group the 

 leading candidates at the present time for the construction of a 10- foot-diameter, 

 10,000-psi vessel. 



2. The segmented and the stacked-ring vessel concepts should be further 

 explored and refined, as they have great potential for construction of pressure 

 vessels with diameters and pressures in excess of 10 feet and 10,000 psi, respec- 

 tively. 



3. An exploratory study of the implosion effects inside pressure vessels should 

 be immediately initiated. The analytical and experimental data gathered by 

 such study will be of importance in the design of future pressure vessels. 



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