COMPUTATIONAL FLUID DYNAMICS COMBUSTION SIMULATION OF TRANSPORTATION PACKAGE PERFORMANCE IN SEVERE, LONG DURATION FIRE
3rd Canadian Nuclear Waste Management Decommissioning and Environmental Restoration - 2016 Sept. 11-14


Presented at:
3rd Canadian Nuclear Waste Management Decommissioning and Environmental Restoration
2016 Sept. 11-14
Location:
Ottawa, Canada
Session Title:
Session M3: Waste Transportation

Authors:
Y. Sui (Nuclear Waste Management Organization)
  

Abstract

The Nuclear Waste Management Organization (NWMO) is designing a new transportation package to meet international regulations for the safe transport of radioactive material. One requirement in the regulation is an accident condition thermal test involving a 30-minute, fully engulfing fire at 800°C. That regulatory test presents severe bounding conditions based on international experience and research. However, fresh on the minds of the public are examples of transportation accidents that have resulted in long duration fires. Therefore, the regulatory thermal test is not immediately relatable to the general public. Reconciling the 30-minute regulatory thermal test with long duration transportation accident fires lasting hours requires careful discussion and verbose explanation. NWMO wishes to add support to that discussion by building skills and expertise necessary to simulate hypothetical transportation accident scenarios involving NWMO’s transportation packages and severe, long duration fires.

The regulatory thermal test is a set of well-defined conditions that are easily modeled in finite element analysis software using heat transfer boundary conditions. In contrast, modeling highly dynamic nature of transportation accident fires requires sophisticated, computational fluid dynamics analysis tools. This work explores the use of ANSYS Fluent for modeling severe, long duration fires. By simulating complex interactions between chemical combustion reactions with dynamic fluid flow, NWMO builds understanding of dynamic nature of fires and their transient effects on large transportation packages.

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