Hydraulics radionuclide transport

Local hydro-geological conditions were considered for each zone where the radionuclides transport occurs, namely for the contaminated zone, for the unsaturated zone and for the saturated zone, using different densities, porosities, hydraulic conductivities, radionuclide distribution coefficients and thicknesses. The well is located at the down-gradient edge of the contamination source. 

It has been pointed out that both hydraulic data and materials property data are needed in order to simulate radionuclide transport in... 

Each Gen-lV system requires challenging R D projects some are common to all whereas others are specific to the system. For example, the list of Gen-lV safety crosscut items comprises system optimization and safety assessment methodology, emergency planning methods, licensing and regulatory framework, radionuclide transport and dose assessment, and human factors. Additional R D areas of common interest are proposed as instrumentation and control, human machine interface, reactor physics and thermal-hydraulics, risk management, operation and maintenance. 

The challenges that remain are in actually proving that releases absolutely cannot occur (given it is hard to prove a negative and such data are scarce) and that all potential core damage states are either avoided and/or adequately cooled. The methods used include SA analysis codes structural failure mode analysis radionuclide transport in buildings and the environment historical geotechnical, hydraulic, and seismic response analysis and PRAs. 

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