Investigation determines the depth to which the N.S. Savannah can sink before the combination of bending due to weight loading and external sea water pressure causes collapse of the unflooded containment vessel and allows possible escape of radioactive contaminants to the environment. The investigation also includes determination of the worst attitudes in which the ship might sink and evaluation of various portions of the containment vessel to determine weak points. Calculations were made for the stiffener rings in the cylindrical portion of the containment vessel for the ship sinking while rolled over at 90 degrees on either side, and sinking aft end down. Uniform external hydrostatic pressure, buoyancy, and weight of the containment vessel are sources of force on the stiffener rings. It was found that the stiffener rings would be the first portion of the containment vessel to collapse due to external pressure alone. Instability of one or more stiffener rings can result in a progressive collapse of the vessel and rupture of the containment shell.

  • Supplemental Notes:
    • This document is available for review at the Department of Commerce Library, Main Commerce Building, Washington, D.C., under reference number ESI-57-1.
  • Corporate Authors:

    Ebasco Services Incorporated

    Two Rector Street
    New York, NY  United States 

    States Marine Lines, Incorporated

  • Publication Date: 1961-12

Media Info

  • Features: Appendices; Figures; References; Tables;
  • Pagination: 91 p.

Subject/Index Terms

Filing Info

  • Accession Number: 00026354
  • Record Type: Publication
  • Source Agency: Maritime Administration
  • Report/Paper Numbers: ESI-57-1 Intrm Rpt
  • Contract Numbers: MA-1889
  • Files: TRIS, USDOT
  • Created Date: Feb 14 1973 12:00AM