ENDF70: A Continuous-Energy MCNP Neutron Data Library Based on ENDF/B-VII.0
| Autor: | Holly R. Trellue, R. C. Little, Morgan C. White, A.C. Kahler, R. E. MacFarlane |
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| Rok vydání: | 2009 |
| Předmět: |
Nuclear and High Energy Physics
business.industry Computer science 020209 energy Nuclear engineering Sample (material) 02 engineering and technology Condensed Matter Physics Set (abstract data type) Nuclear physics 020303 mechanical engineering & transports Data point 0203 mechanical engineering Nuclear Energy and Engineering 0202 electrical engineering electronic engineering information engineering Range (statistics) Data library Neutron business Quality assurance Energy (signal processing) |
| Zdroj: | Nuclear Technology. 168:832-836 |
| ISSN: | 1943-7471 0029-5450 |
| Popis: | Following the release of ENDF/B-VII.0 evaluations, an ACE-formatted continuous-energy neutron data library called ENDF70 for MCNP has been produced at Los Alamos National Laboratory. This new library contains data for 387 isotopes and three elements at five temperatures: 293.6, 600, 900, 1200, and 2500 K. It can be obtained as part of the MCNP5 1.50 release. The new library was created using ENDF/B-VII.0 neutron evaluations and primarily version 248 of NJOY99. A processing script was created that set up the input files for NJOY and employed checking codes to test the content of the processed data. A sample MCNP run was performedfor each isotope and temperature, and cross sections for each isotope were plotted to make sure there were no major problems. The processed ACE libraries did not always pass all quality assurance tests. For example, energy-balance problems were identified for several evaluations having negative heating numbers or inconsistencies between total and partial heating. Similarly, some problems were found with unresolved resonance probability tables, resulting in probability tables being excluded from the final library for several materials. Certain evaluations were modified and reprocessed as a result of the quality assurance tests, and some data points in the final ACE files were changed because they were too small or had other problems. The new ENDF70 library provides MCNP users with the latest ENDF/B data available. This collection of data includes a larger range of isotopes and temperatures than previously released, which will be beneficial in numerous applications. The upgrades included as part of ENDF/B-VII.0 and, hence, ENDF70 should improve calculations. |
| Databáze: | OpenAIRE |
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