A first collision source method for ATTILA, an unstructured tetrahedral mesh discrete ordinates code
Conference
·
OSTI ID:296754
A semi-analytic first collision source method is developed for the transport code, ATTILA, a three-dimensional, unstructured tetrahedral mesh, discrete-ordinates code. This first collision source method is intended to mitigate ray effects due to point sources. The method is third-order accurate, which is the same order of accuracy as the linear-discontinuous spatial differencing scheme used in ATTILA. Numerical results are provided to demonstrate the accuracy and efficiency of the first collision source method.
- Research Organization:
- Los Alamos National Lab., NM (United States)
- Sponsoring Organization:
- USDOE, Washington, DC (United States)
- DOE Contract Number:
- W-7405-ENG-36
- OSTI ID:
- 296754
- Report Number(s):
- LA-UR--98-1373; CONF-980403--; ON: DE99000616
- Country of Publication:
- United States
- Language:
- English
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