Risk Assessment is the identification of potential events that could damage a system and estimation of the probable costs. This enables decision makers to choose appropriate mitigating measures, such as reinforcing buildings in coastal areas to reduce the risk of hurricane damage. Performance Assessment quantifies the probability of a system achieving its design objective, such as estimating the probability that a storage facility will comply with regulatory standards. I've applied the statistical and computer modeling tools of hydrogeology to in a number of Risk and Performance assessment projects.

Nuclear Fuel Disposal

I spent several years evaluating the performance of repositories for nuclear waste the USA, Sweden, and Japan, using a variety of methods to evaluate the probable radiological dose to humans. This included the Alternative Models Project, which evaluated the performance of a geologic repository for spent fuel under differing assumptions for the underlying geologic model. As well as collaborating on one of the models and co-authoring the report, the project sponsor, Swedish Nuclear Fuel and Waste Management Co (SKB), asked that I present the study on their behalf at conferences in Canada and Japan. The paper that resulted from this project was very well received:

Selroos, Walker, Strom, Gylling and Follin, 2002. Comparison of Alternative Modeling Approaches for Groundwater Flow in Fractured Rock, J. Hydrology 257.

Water Risk

Many corporations have begun to realize that their operations can be compromised because of water quantity, quality, and politics - even if their products do not incorporate water. But identifying water risks can be challenging for multinational corporations because the risks related to water resources are specific to each location. I have worked with several companies and communities to assess water risks, ranging from corporation-wide screening of global facilities to evaluating specific locations in Illinois. I've also authored a white paper summarizing several tools and challenges associated with evaluating water risks.