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DOE OSTI · 1821552

Validation of the SCEPTRE Boltzmann-CSD Solver

Drumm, Clifton R.·Fan, Wesley C.
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Abstract

A new Boltzmann-CSD solver has been developed within the SCEPTRE radiation-transport code, based on the 1st-order form of the transport equation, using discontinuous finite elements in space and energy and discrete ordinates in angle. The Boltzmann-CSD solver has been validated against experimental data for electron energy deposition distributions and for electron emission spectra. Comparison of the calculated results with experimental data shows excellent agreement for many of the test configurations and reasonable agreement for other test configurations. The tests have also been modeled with the ITS Monte Carlo code, which also shows excellent to reasonable agreement with the SCEPTRE results and experimental data. The SCEPTRE Boltzmann-CSD solver relies on electron cross sections generated by the legacy CEPXS code, which currently is limited to electron-only Boltzmann-CSD cross sections. Performing full electron-photon radiation transport with the Boltzmann-CSD solver will require further development in the cross section generating code. For the energy- deposition calculations, neglecting photon transport results in at most about 5% overprediction of the energy deposition for high-energy electrons on high-Z targets, and relatively insignificant difference for the other test configurations.

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73 NUCLEAR PHYSICS AND RADIATION PHYSICS

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BibTeXRIS

Drumm, Clifton R., Fan, Wesley C.. 2021-08-01. Validation of the SCEPTRE Boltzmann-CSD Solver. https://doi.org/10.2172/1821552

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