Problem-dependent doppler broadening of continuous-energy cross sections in the keno monte carlo computer code

Shanew D. Hart; G. Ivan Maldonado; Cihangir Celik; Luiz C. Leal

Problem-dependent doppler broadening of continuous-energy cross sections in the keno monte carlo computer code

Criticality Safety Analysis and Research

Research output: Contribution to conference › Paper › peer-review

9 Scopus citations

Abstract

This paper discusses recent progress in the SCALE KENO Monte Carlo code to generate problem-dependent, Doppler-broadened cross sections. The approach investigated in this study uses a finite-difference method to calculate the temperature-dependent cross sections for the 1D data, and a simple linear-logarithmic interpolation in the square root of temperature for the probability tables. With the current approach, the temperature-dependent cross sections are Doppler broadened before transport starts, and the impact on cross section loading is negligible for all but a few isotopes. Results are compared with those obtained by using multigroup libraries. Current results compare favorably with these expected results.

Original language	English
State	Published - 2014
Event	2014 International Conference on Physics of Reactors, PHYSOR 2014 - Kyoto, Japan Duration: Sep 28 2014 → Oct 3 2014

Conference

Conference	2014 International Conference on Physics of Reactors, PHYSOR 2014
Country/Territory	Japan
City	Kyoto
Period	09/28/14 → 10/3/14

Funding

This work was supported by the DOE Nuclear Criticality Safety Program, funded and managed by the National Nuclear Security Administration for the Department of Energy.

Keywords

Monte carlo
On-the-fly doppler broadening
Scale

Cite this

@conference{205b1d082ebb4886857fd80754f185e1,

title = "Problem-dependent doppler broadening of continuous-energy cross sections in the keno monte carlo computer code",

abstract = "This paper discusses recent progress in the SCALE KENO Monte Carlo code to generate problem-dependent, Doppler-broadened cross sections. The approach investigated in this study uses a finite-difference method to calculate the temperature-dependent cross sections for the 1D data, and a simple linear-logarithmic interpolation in the square root of temperature for the probability tables. With the current approach, the temperature-dependent cross sections are Doppler broadened before transport starts, and the impact on cross section loading is negligible for all but a few isotopes. Results are compared with those obtained by using multigroup libraries. Current results compare favorably with these expected results.",

keywords = "Monte carlo, On-the-fly doppler broadening, Scale",

author = "Hart, \{Shanew D.\} and Maldonado, \{G. Ivan\} and Cihangir Celik and Leal, \{Luiz C.\}",

note = "Publisher Copyright: {\textcopyright} 2014 Westinghouse Electric Company LLC. All Rights Reserved.; 2014 International Conference on Physics of Reactors, PHYSOR 2014 ; Conference date: 28-09-2014 Through 03-10-2014",

year = "2014",

language = "English",

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TY - CONF

T1 - Problem-dependent doppler broadening of continuous-energy cross sections in the keno monte carlo computer code

AU - Hart, Shanew D.

AU - Maldonado, G. Ivan

AU - Celik, Cihangir

AU - Leal, Luiz C.

PY - 2014

Y1 - 2014

N2 - This paper discusses recent progress in the SCALE KENO Monte Carlo code to generate problem-dependent, Doppler-broadened cross sections. The approach investigated in this study uses a finite-difference method to calculate the temperature-dependent cross sections for the 1D data, and a simple linear-logarithmic interpolation in the square root of temperature for the probability tables. With the current approach, the temperature-dependent cross sections are Doppler broadened before transport starts, and the impact on cross section loading is negligible for all but a few isotopes. Results are compared with those obtained by using multigroup libraries. Current results compare favorably with these expected results.

AB - This paper discusses recent progress in the SCALE KENO Monte Carlo code to generate problem-dependent, Doppler-broadened cross sections. The approach investigated in this study uses a finite-difference method to calculate the temperature-dependent cross sections for the 1D data, and a simple linear-logarithmic interpolation in the square root of temperature for the probability tables. With the current approach, the temperature-dependent cross sections are Doppler broadened before transport starts, and the impact on cross section loading is negligible for all but a few isotopes. Results are compared with those obtained by using multigroup libraries. Current results compare favorably with these expected results.

KW - Monte carlo

KW - On-the-fly doppler broadening

KW - Scale

UR - https://www.scopus.com/pages/publications/85105452913

M3 - Paper

AN - SCOPUS:85105452913

T2 - 2014 International Conference on Physics of Reactors, PHYSOR 2014

Y2 - 28 September 2014 through 3 October 2014

ER -

Problem-dependent doppler broadening of continuous-energy cross sections in the keno monte carlo computer code

Abstract

Conference

Funding

Keywords

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