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This report describes the PACOMA assessment of the radiological impact of disposal of intermediate level and alpha-bearing wastes in a hypothetical repository situated in the clay formations below the Harwell site in the United Kingdom. The assessment includes best estimate calculations, uncertainty analyses, sensitivity analyses and model comparisons. Results of the radiological impact calculations are in the form of doses and risks to individuals and time-integrated doses to populations, for a normal evolution scenario and a number of altered evolution scenarios. The calculated risks to individuals are well below the limit recommended by the ICRP, and the calculated collective dose over the first 10,000 years after disposal is zero. Thus the radiological impact of the disposal of intermediate level and alpha-bearing wastes in a clay formation is predicted to be small. The sensitivity analyses and model comparisons indicate the need for improved models and data for water and radionuclide movement in the near-surface environment.

Additional information

Authors: MOBBS S F ET AL., National Radiological Protection Board (GB);LAURENS J-M, Electrowatt Engineering Services Ltd. (GB);WINTERS K H, UKAEA, Harwell Laboratory, Abingdon, Oxon. (GB);BEALBY J M, Principia Mechanica, YARD Ltd. (GB);DALRYMPLE G, Principia Mechanica, YARD Ltd. (GB)
Bibliographic Reference: EUR 13143 EN (1991) 439 pp., FS, ECU 37.50
Availability: (2)
ISBN: ISBN 92-826-2163-4
Record Number: 199110240 / Last updated on: 1994-12-02
Original language: en
Available languages: en