NUCLEAR CRITICALITY AND RADIATION SHIELDING CALCULATIONS FOR DAMAGED AND UNDAMAGED ARRAYS OF PLUTONIUM AIR TRANSPORTABLE (PAT-1) PACKAGES

PAT-1 is a shock- and fire-resistant assembly for safe air transport of new (nonspent) powdered PuO sub 2 reactor fuel. This paper defines the radiation source terms and presents the methods and results of shielding calculations as well as the nuclear criticality calculations for stacked arrays of PAT-1 packages. Due to the 25-W radioactive decay power limitation, the maximum amount of new PuO sub 2 allowed in the package for a storage period of 13.5 years is 1.84 kg, so that the criticality calculations based on 3.15 kg are extremely conservative; an infinite number of damaged or undamaged packages immersed in and reflected by water are far from critical. Total radiation dose rate at surface of undamaged package is less than the maximum 200 mrem/h, and at 3 ft is less than 10 mrem/h (undamaged) or 1 rem/h (damaged). (ERA citation 03:053280)

  • Supplemental Notes:
    • Symposium on packaging and transportation of radioactive materials, Las Vegas, NV, USA, 7 May 1978, Microfiche copies only.
  • Corporate Authors:

    Sandia Laboratories

    P.O. Box 5800
    Albuquerque, NM  USA  87115

    Department of Energy

    1000 Independence Avenue, SW
    Washington, DC  USA  20585
  • Authors:
    • Schmidt, W H
  • Publication Date: 1978

Media Info

  • Pagination: 9 p.

Subject/Index Terms

Filing Info

  • Accession Number: 00186804
  • Record Type: Publication
  • Source Agency: National Technical Information Service
  • Report/Paper Numbers: CONF-780506-16
  • Contract Numbers: EY-76-C-04-0789
  • Files: TRIS
  • Created Date: Feb 27 1979 12:00AM