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PET Cyclotron Design for Decommissioning and Waste Inventory Reduction

[+] Author Affiliations
Bob Major

AMEC Power and Process, UK, Birchwood, UK

Paper No. ICEM2009-16098, pp. 19-24; 6 pages
  • ASME 2009 12th International Conference on Environmental Remediation and Radioactive Waste Management
  • ASME 2009 12th International Conference on Environmental Remediation and Radioactive Waste Management, Volume 2
  • Liverpool, UK, October 11–15, 2009
  • Conference Sponsors: Nuclear Engineering Division and Environmental Engineering Division
  • ISBN: 978-0-7918-4408-3 | eISBN: 978-0-7918-3865-X
  • Copyright © 2009 by ASME


In this paper we will examine the decommissioning and radioactive waste implications of a hypothetical cyclotron facility. from conception through design into operation and finally decommissioning. Supported by the computer codes MCNPX, MCNP and FISPACT we illustrate the induced activity in the cyclotron pit walls. Using the computer codes it is possible to highlight the problems associated with neutron activation of the cyclotron pit walls and the need for specialist shielding materials, such as boronated polyethylene. Using MCNP it is possible to design a vault for cost effective decommissioning through the use of sacrificial layers. This code allows the likely degree of activation and penetration of activation products to be quantified and hence gives an idea of waste disposal costs. In summary, a dedicated PET facility will challenge most RPAs. A wide range of skills are needed which encompass practical operational procedures, through specialist shielding design using Monte Carlo codes to the ability to appear confident to Regulators who may be finding the experience the same steep learning curve.

Copyright © 2009 by ASME



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