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Hamburg 2009 – scientific programme

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AGA: Arbeitsgruppe Physik und Abrüstung

AGA 5: Verification and Detection

AGA 5.1: Talk

Friday, March 6, 2009, 10:30–11:00, VMP 9 HS

Detectability of unreported nuclear reprocessing analysed by atmospheric krypton-85 modelling — •Ole Ross1,4, Robert Annewandter1, Johann Feichter2, Sebastian Rast2, K. Heinke Schlünzen3, and Martin B. Kalinowski11Carl Friedrich v. Weizsäcker Centre for Science and Peace Research, University of Hamburg — 2Max Planck Institute for Meteorology, Hamburg — 3Meteorological Institute, University of Hamburg — 4International Max Planck Research School on Earth System Modelling

As project within the German support programme to IAEA Safeguards the detectability of additional 85Kr sources using atmospheric transport modelling was investigated. 85Kr is released into the air during reprocessing of spent nuclear fuel rods. Therefore it can possibly be used as indicator for the detection of undeclared plutonium separation. First, the global 85Kr background produced by known reprocessing facilities from 1971 until 2006 was simulated with the atmospheric general circulation model ECHAM5. Based on the background study, the detection sensitivity to a set of arbitrarily specified source locations is analysed with a lagrangian particle dispersion model. This, in combination with the location specific background variability simulated by the global model, is giving first benchmarks on the capability of using 85Kr for IAEA Safeguards on the NPT based on the Additional Protocol and its possible contribution for the verification of a future Fissile Material Cut-off Treaty.

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