Source Term Assessment from Off-Site Gamma Radiation Measurements
During a nuclear accident in which radionuclides are released to the atmosphere automatic off-site gamma radiation measurements may be used to assess the source strength and the dispersion of radionuclides. In the following, a newly developed sequential data assimilation method for such on-line source term estimation is presented and results are shown using both real and simulated radiation data.1 The method is based on a discrete-time, stochastic state space model describing the dynamics of the significant plume parameters (the state variables) and their coupling to measurements through a non-linear atmospheric dispersion model.
KeywordsAtmospheric Dispersion Plume Height Atmospheric Dispersion Model Gaussian Plume Model State Space Parameter
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