There are two versions of the Contaminant Transport Module that can be added to GoldSim: the CT Module and the RT Module. Your copy of GoldSim will have neither, one, or the other (but not both), depending on your license. The CT (Contaminant Transport) Module provides all of the features and capabilities that most contaminant transport modelers will need. The RT (Radionuclide Transport) Module includes all of the capabilities of CT, along with several additional features designed to facilitate simulation of radioactive waste disposal facilities and the fate and transport of radionuclides in the environment.
In particular, the RT module provides the following additional features:
•The RT Module allows decay chains (daughter products) to be simulated (one species can be specified to transform into one or more others). To support modeling of radioactive decay chains, the RT Module also allows you to link to an extensive database of radionuclide decay data (based on a standard reference provided by the International Commission for Radiation Protection).
•The CT Module allows you to specify decay rates, but you cannot specify reaction (daughter) products.
•The RT Module provides a special element called a Source. The Source element can be used to simulate the complex release mechanisms of contaminants from engineered systems. This is particularly useful when simulating the behavior of proposed or existing waste disposal facilities, which have as part of their design engineered packages or containers in which the waste is placed prior to disposal.
•The RT Module has a special type of pathway element called a Network Pathway. Network pathways provide a computationally efficient way to simulate large, complex networks of one-dimensional conduits in order to describe contaminant transport through fractured rock systems.
•The RT Module has a special type of element called a CellNet Generator. CellNet Generators provide an easy way to rapidly create two-dimensional Cell networks.
•The RT Module provides an option to utilize a large built-in database of radionuclide decay data (species, decay rates and daughter products). The data is based on the International Commission for Radiation Protection (ICRP)’s Publication 107. The feature allows you to view over 1300 radionuclides (along with their corresponding stable elements) and to selectively include some of these radionuclides in your simulation.