English Abstract This report is part of a series of reports describing
the RIVM modelling efforts carried out within the INTRAVAL framework. The
validation exercise should help to assess the validity and the suitability
of the METROPOL computer code, which was developed in RIVM for the
hydrological calculations needed in the safety assessment studies. This
report contains results of calculations made with METROPOL for test-case 1A:
Radionuclide migration in clay samples based on laboratory experiments
performed at Harwell U.K. For this purpose two different conceptual models
are used. The first one is a simple diffusion and advection model. The
second includes the concept of matrix diffusion due to the presence of a
dual porosity.
