Application of Power Time-Projection on the Operator Splitting Coupling Scheme of the TRACE/S3K Coupled Code

This paper reports refinement studies on the temporal coupling scheme and time-stepping management of TRACE/S3K, a dynamically coupled code version of the thermal-hydraulics system code TRACE and the 3D core simulator Simulate-3K. The studies were carried out for two test cases, namely a PWR rod ejection accident and the Peach Bottom 2 Turbine Trip Test 2. The solution of the coupled calculation, especially the power peak, proves to be very sensitive to the time-step size with the currently employed conventional operator-splitting. Furthermore, a very small time-step size is necessary to achieve decent accuracy. This degrades the trade-off between accuracy and performance. A simple and computationally cheap implementation of time-projection of power has been shown to be able to improve the convergence of the coupled calculation. This scheme is able to achieve a prescribed accuracy with a larger time-step size.


Published in:
Proceeding of the International Conference on Mathematics and Computational Methods Applied to Nuclear Science and Engineering (M&C 2013)
Presented at:
International Conference on Mathematics and Computational Methods Applied to Nuclear Science and Engineering (M&C 2013), Sun Valley, Idaho, USA, May 5-9, 2013
Year:
2013
Publisher:
American Nuclear Society
ISBN:
978-0-89448-700-2
Keywords:
Laboratories:


Note: The status of this file is: Involved Laboratories Only


 Record created 2013-12-12, last modified 2018-03-17

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