Dynamic Modeling of Physical Phenomena for Probabilistic Assessment of Spent Fuel Accidents

  • Benjamin A
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Abstract

If there should be an accident involving drainage of all the water from a spent fuel pool, the fuel elements will heat up until the heat produced by radioactive decay is balanced by that removed by natural convection to air, thermal radiation, and other means. If the temperatures become high enough for the cladding or other materials to ignite due to rapid oxidation, then some of the fuel might melt, leading to an undesirable release of radioactive materials. The amount of melting is dependent upon the fuel loading configuration and its age, the oxidation and melting characteristics of the materials, and the potential effectiveness of recovery actions. We have developed methods for modeling the pertinent physical phenomena and integrating the results with a probabilistic treatment of the uncertainty distributions. The net result is a set of complementary cumulative distribution functions for the amount of fuel melted.

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Benjamin, A. S. (1999). Dynamic Modeling of Physical Phenomena for Probabilistic Assessment of Spent Fuel Accidents. In Analysis of Risks Associated with Nuclear Submarine Decommissioning, Dismantling and Disposal (pp. 201–215). Springer Netherlands. https://doi.org/10.1007/978-94-011-4595-4_24

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