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Comparison of transfer parameters in TRS-472 and Canadian standard CSA N288.1 and doses predicted using them

  • J. Barescut, D. Lariviere, T. Stocki, S.L. Chouhan (a1), D. Rowan (a1) and M. Stuart (a1)...

Abstract

We compared parameter values and models in N288.1 and TRS-472 and the doses predicted using them. The parameter values and models for tritium and C-14 are similar. For other radionuclides, the parameter values agree well for soil to plant transfer, and forage to animal products transfer. Agreement is not always good for the translocation factor (for which N288.1 is often more conservative) and for soil and sediment Kd and freshwater fish BAFs (for which N288.1 is often less conservative). Using parameter values from N288.1 rather than using those from TRS-472 results in higher doses for 8 of 9 radionuclides for airborne releases, and for 5 of 9 radionuclides for aquatic releases. For airborne releases, the maximum difference occurs for I-131, where using N288.1 parameter values results in doses being seven times higher. For aquatic releases, the difference reaches a factor of 194 for Co-60, with the use of N288.1 parameter values resulting in the lower dose. Where differences exist, site-specific values for key radionuclides should be obtained through a review of available data or new experiments. In the absence of site-specific data, the more conservative of the values in N288.1 and TRS-472 should be used.

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[1][1]CSA., Guidelines for calculating derived release limits for radioactive material in airborne and liquid effuents for normal operation of nuclear facilities. CSA N288.1-08. (Canadian Standards Association, Mississauga 2008).
[2][2]IAEA., Handbook of parameter values for the prediction of radionuclide transfer in terrestrial and freshwater environments. TRS-472. (International Atomic Energy Agency, Vienna, 2010).
[3][3]IAEA., Handbook of parameter values for the prediction of radionuclide transfer in temperate environments. TRS-364. (International Atomic Energy Agency, Vienna, 1994).
[4][4]P.A. Davis, S.B. Kim, S.L. Chouhan and W.J.G. Workman., Observed and Modeled Tritium Concentrations in the Terrestrial Food Chain near a Continuous Atmospheric Source (Fusion Science and Technology Journal, 2005) Volume 48, Number 1, pp. 504-507.
[5][5]M. Audette-Stuart, S.L. Chouhan, S.J. Kramer-Tremblay, C. Shultz, K.J. Sharp, T.L. Yankovich and M.L. Benz. Validation of the Carbon Specific Activity Model in IMPACT Using Carbon-14 Environmental Data Collected in the Vicinity of PNGS During the Summer of 2002. COG-03-3047, 2004.
[6][6]D.J. Rowan, and J.B. Rasmussen, Bioaccumulation of radiocesium by fish: the influence of physicochemical factors and trophic structure. (Canadian Journal of Fisheries and Aquatic Sciences, 1994), 51: 2388-2410.
[7][7]L.A Chant, D.S. Hartwig and M. Totland, Site specific aquatic transfer factors for CANDU sites in Canada, AECL RC-2457, 2000.

Comparison of transfer parameters in TRS-472 and Canadian standard CSA N288.1 and doses predicted using them

  • J. Barescut, D. Lariviere, T. Stocki, S.L. Chouhan (a1), D. Rowan (a1) and M. Stuart (a1)...

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