Demonstration Anchor 



Transfer of the f ree-fall-emplaced, deadweight anchor technology 

 to industry will require a demonstration of the anchor concept using a 

 near-prototype-scble anchor. This demonstration anchor system would 

 probably be designed for and utilized as a mooring for the planned 5 MWe 

 OTEC Pilot Power Plant. The following te:.t elaborates on this demonstra- 

 tion phase. 



Design Anchor . A suitable test-site/construction-site combination 

 would be selected. All available data on the proposed anchor test site 

 would be collected and evaluated to develop a preliminary profile of 

 soil engineering properties with depth and a preliminary picture of 

 areal variation. A set of anchor requirements would be selected to fit 

 the test requirements, and a preliminary design prepared using the 

 analytical model developed. Concurrently, a site survey would be made, 

 if necessary, to enhance the geotechnical data bank and to provide 

 additional quantitative input for the demonstration anchor final design. 

 The preliminary anchor design would then be reviewed in light of the 

 necessary specific site data and a final workin' esign prepared. 



Fabricate Anchor, U-joint, Mooring Line, and Instrumentation . When 

 a final design has been reached for the demonstration anchor, then 

 fabrication of mooring components by selected contractors can begin. 

 Fabrication of the anchor would probably be accomplished in a shipyard. 



Because this report is directed toward anchors for OTEC, 

 other parts of the total mooring have not been mentioned, 

 although these parts - e.g., mooring line, buoyancy elements, 

 U-joint — have all had an impact on the final ancnor recom- 

 mendations. The mooring line would probably be braided 

 synthetic with syntactic foam buoyant elements attached 

 along the lower part of the line to make that lower part 

 positively buoyant. The U-joint, located between the moor- 

 ing line and the anchor, would draw on those designs that 

 have been service-proven in single-point moorings for tanker 

 loading/unloading. 



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