Autor: |
P N Brown, S McKinley, R N Blomquist, C J Dean, J C Sublet, R. E. MacFarlane, Y Lee, E F Plechaty, E Lent, D E Cullen, M E Dunn |
Rok vydání: |
2007 |
Předmět: |
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Popis: |
In this report we consider three fast critical assemblies, each assembly is dominated by a different nuclear fuel: Godiva (U235), Jezebel (Pu239) and Jezebel23 (U233) [1]. We first show the improvement in results when using the new ENDF/B-VII.0 data [2], rather than the older, now frozen, ENDF/B-VI.8 data [3]. We do this using what we call a one code/ multiple library approach, where results from one code (MCNP) are compared using two different data libraries (ENDF/B-VII.0 and VI.8). Next we show that MCNP results are not specific to this one code by using what we call a one data library/multiple code approach; for this purpose we invited many codes to submit results using the ENDF/B-VII.0 data; the most detailed results presented in this report compare MCNP and TART. The bottom line is that we have shown that using the new ENDF/B-VII.0 data library with a variety of transport codes, for the first time we are able to reproduce the expected K-eff values for all three assemblies to within the quoted accuracy of the models, namely 1.0 +/- 0.001. This is a BIG improvement compared to the results obtained using the older ENDF/B-VI.8 data library. Another important result of this studymore » is that we have demonstrated that currently there are many computer codes that can accurately use the new ENDF/B-VII.0 data.« less |
Databáze: |
OpenAIRE |
Externí odkaz: |
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