Abstract: A packaging system for storage of containers of low-level radioactive waste consisting of a concrete shell structure that houses the containers and a dry filler material that surrounds them. Void volume in the filler material is saturated with water, and during free-fall descent to the seafloor, a pressure compensation means equalizes pressures inside and outside the packaging structure and forces the filler material into intimate contact about the drums; on the seafloor, the filler material hardens to produce a highly secure barrier to any leaking of radioactive waste.

Abstract: A structural grade lightweight concrete that is especially suited for ocean pplications. The lightweight concrete uses regular lightweight aggregate particles that have been modified by filling the voids within the particles with a polymeric material. The polymer-filled aggregate particles are then bonded together using a cementitious or binder material to form concrete. Typically Portland cement is used as the binder to produce a lightweight concrete for construction of ocean structures.

Abstract: A means for placing freshly mixed concrete on the ocean floor at great des. A pipeline is grossly positioned by a ship whereas the position of the submerged end is controlled by guide wires, water jets, props, etc. The discharge device at the end of the pipeline includes a slip joint, a tank flooded with seawater to maintain the pipe end submerged a certain distance in the concrete, and an expansion chamber where the velocity of the concrete being discharged is reduced. Deflector means at the pipe end directs the concrete laterally and negates the vertical lift component of the discharging concrete.

Abstract: A high lateral load capacity, free-fall, deadweight anchor comprising a f plate having a lip attached to its periphery to eliminate skating during free-fall; a wire mesh screen attached to the lip to control vortex shedding such that the flat plate maintains an upright posture during free-fall; and a plurality of shear keys attached to the underside of the plate which imparts a high lateral load capability to the anchor.