A publication of the Advanced Simulation & Computing Division, NA-121.2, NNSA Defense Programs
March 2009
NA-ASC-500-09—Issue 10
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SIERRA Successfully Deployed at KCP in Support of Defense Programs Applications
The latest SIERRA engineering simulation framework has been deployed on the KCP Tri-Lab Capacity Cluster (TLCC) platform in support of various Defense Programs (DP) applications. The codes have been very successful, both on implementation and operations. The projects performed since last fall include various W76 applications–supporting current production build schedules. Examples include a Lightning Arrestor Connector abnormal loading review, Trajectory Strong Link feed-thru header sealing evaluations, encapsulation flow of electronics, header welding operations, vendor forging operations, safety reviews of mixing operations, and high-voltage abnormal drop loadings. Advanced development support for internal PDRD projects is also being performed with the tools, focused on fluid/solid interactions and coupling methods. The figure below shows a design change to increase durability by eliminating solder joints and a crystal based on SIERRA simulations.
A design change based on Sierra simulations.
The tools, techniques, and fast processing utilizing the SIERRA framework have been critical to meeting schedule targets on the W76-1 arming fuzing & firing (AF&F) builds. Uncertainties in manufacturing, including abnormal environment issues and rate production concerns, are being addressed with the toolset. Specifically, the Aria, Adagio, Presto, and Calore software tools are being used, along with coupling using the Calagio code. It is anticipated that KCP will continue to use the simulation methods to support AF&F production concerns, and use this methodology of evaluations for new production schemes for future LEPs.
KCP would not have been able to advance so quickly with the tools had it not been for the dedicated work done to deliver the codes to a Production site. This includes the efforts on the application builds, the work done for stability of the codes, and the custom training and support given to make this remote effort successful.
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