P Smedley

Publications (2)4.46 Total impact

• Article: Marine radioactivity assessment of Mururoa and Fangataufa atolls

  P. P. Povinec, D. Woodhead, P. Blowers, R. Bonfield, M. Cooper, Q. Chen, H. Dahlgaard, C. Dovlete, V. Fox, K. Froehlich, [......], A. Krüger, L. L. Kwong, M. Matthews, U. Morgenstern, S. Mulsow, H. Pettersson, P. Smedley, B. Taylor, C. Taylor, R. Tinker
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  ABSTRACT: The International Atomic Energy Agency (IAEA) carried out an international project. 'The Study of the Radiological Situation at the Atolls of Mururoa and Fangataufa' with the aim of assessing the present and future radiological situation at the atolls and making recommendations for either monitoring or remedial actions if they are deemed necessary. The paper concentrates on marine radioactivity aspects and gives an estimation of present radionuclide concentrations in water, sediment and biota of the Mururoa and Fangataufa lagoons and the surrounding ocean. The dominant radionuclide in both lagoons is Pu in sediments (the total inventory is approximately 30 TBq). A decline in radionuclide concentrations has been observed in recent years in lagoon water, with the exception of 3H and 90Sr, for which a contribution from underground sources is to be expected. Radionuclide concentrations in biota from the lagoons and the surrounding ocean are low and consistent with previous measurements. The observed radion
  Science of The Total Environment 01/1999; 237-238:249-267. · 3.29 Impact Factor
• Source

  Available from: Lindis Skipperud

  Article: Characterization of the NIST seaweed Standard Reference Material.

  I Outola, J Filliben, K G W Inn, J La Rosa, C A McMahon, G A Peck, J Twining, S G Tims, L K Fifield, P Smedley, [......], H Wershofen, D S Sill, S Bohrer, H Dahlgaard, I W Croudace, P E Warwick, T K Ikäheimonen, S Klemola, S M Vakulovsky, J A Sanchez-Cabeza
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  ABSTRACT: The National Institute of Standards and Technology (NIST) Standard Reference Material (SRM) for seaweed was developed through an interlaboratory comparison with 24 participants from 16 countries. After evaluating different techniques to calculate certified values for the radionuclides, the median method was found to be the most representative technique. The certified values were provided for 13 radionuclides and information values were given for 15 more radionuclides. Results for the natural decay series showed disequilibrium in both the uranium and thorium series.
  Applied Radiation and Isotopes 64(10-11):1242-7. · 1.17 Impact Factor