The conceptual design for the high-level waste transport and emplacement ship incorporates features designed to provide exceptional safety with respect of major marine accidents such as collisions, groundings, fire and sinking. The conceptual design incorporates a new form of structural collision protection which will prevent penetration into the cargo space by all ships with speeds less than 24 knots, and many ships with speeds greater than 24 knots. The urethane foam, which acts as the plastic foundation for the outer steel membrane in the collision protection system, also provides permanent buoyancy equal to 74% of the loaded ship weight. The permanent buoyancy provided by the foam in the collision protection system, together with urethane foam provided in other spaces, exceeds the loaded ship weight by over 24%. Even if the ship were cut in two, any portion containing high-level waste cargo would remain afloat. Through the use of high temperature insulation, the ship is demonstrated to be capable of surviving severe fire exposure for periods exceeding 72 hours. The results of a probabilistic safety assessment indicate that probabilities for a collision accident resulting in submergence of HLW cargo is less than 5.9 x 10 sup -10 per outbound transit. Following a technology review and assessment, subjective probabilities for recovery of high-level waste cargo following a marine accident were estimated. 66 refs., 114 figs., 89 tabs. (ERA citation 13:028911)


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    Titel :

    Subseabed Nuclear Waste Disposal Ship Conceptual Design and Accident Analysis: 1986 Status Report


    Beteiligte:

    Erscheinungsdatum :

    1988


    Format / Umfang :

    354 pages


    Medientyp :

    Report


    Format :

    Keine Angabe


    Sprache :

    Englisch




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