2013, October 27 → 31
SNA & MC 2013
Joint International Conference on Supercomputing in Nuclear Applications + Monte Carlo

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Workshop: Monte Carlo Computational Performance Benchmark

Date: Sunday afternoon October 27, 2013.

Workshop coordinator:  J. Eduard Hoogenboom, Delft University of Technology and Delft Nuclear Consultancy (DNC), The Netherlands.

Presenters: J. Eduard Hoogenboom (DNC), Bojan Petrovic (Georgia Tech) and Bill Martin (University of Michigan)

The workshop is intended for all researchers interested in full-core Monte Carlo reactor calculations.

In this workshop the NEA Databank Monte Carlo Performance benchmark will be discussed in an interactive way with the participants.

The Monte Carlo Performance benchmark aims at monitoring the evolution over time of computational ability to perform a full-size Monte Carlo reactor core simulation with detailed axial and pin-power distribution. Full specifications are provided at http://www.oecd-nea.org/dbprog/MonteCarloPerformanceBenchmark.htm.

In the workshop we will introduce the aims and specifications of the benchmark test and discuss what is expected from participants. From the results obtained so far we will discuss the present state of the art of full-core Monte Carlo calculations and the prospects.

Participants who have already contributed to the benchmark results are invited to give a short presentation about the specifics of their calculations.

We will also discuss with all participants in the workshop which extensions of the benchmark specifications are needed, and how to prioritize them, to serve goals other than merely monitoring the computational performance. Additional metrics may include convergence tests of the fission source distribution, determination of dominance ratio, true variance estimation, simulations for more realistic core compositions, burn-up calculations and associated error propagation, inclusion of feedbacks and coupling with thermal-hydraulics calculations, etc.

Finally, this forum will also discuss a separate full-core Monte Carlo benchmark developed by Kord Smith, Ben Forget and others at MIT that will be presented at the Sun Valley M&C Conference in May 2013*. The MIT benchmark complements the computational performance benchmark that is the subject of this forum, and the forum will address how to effectively coordinate these full-core Monte Carlo benchmarks in a synergistic manner. The former aims to retain simple specifications to keep the model development efforts acceptable to most research groups while the latter aims to achieve a very detailed and realistic geometry and includes plant data. Discussion will focus on how to use both in a complementary way as the ideal outcome.

*Nicholas Horelik, Bryan Herman, Benoit Forget, and Kord Smith, “Benchmark for Evaluation and Validation of Reactor Simulations (BEAVRS)”, International Conference on Mathematics and Computational Methods Applied to Nuclear Science & Engineering (M&C 2013), Sun Valley, Idaho, USA, May 5-9, 2013.