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Operated by Los Alamos National Security, LLC for NNSA U N C L A S S I F I E D LA-UR-10-draft Slide 1 ENDF/B-VII.0 Data Testing of 233 U/Th ICSBEP Benchmarks.

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Presentation on theme: "Operated by Los Alamos National Security, LLC for NNSA U N C L A S S I F I E D LA-UR-10-draft Slide 1 ENDF/B-VII.0 Data Testing of 233 U/Th ICSBEP Benchmarks."— Presentation transcript:

1 Operated by Los Alamos National Security, LLC for NNSA U N C L A S S I F I E D LA-UR-10-draft Slide 1 ENDF/B-VII.0 Data Testing of 233 U/Th ICSBEP Benchmarks A. C. (Skip) Kahler Los Alamos National Laboratory IAEA Consultants Meeting to Review Benchmarking of Nuclear Data for the U/Th Fuel Cycle December, 2010 This work was carried out under the auspices of the National Nuclear Security Adminis- tration of the U.S. Department of Energy at Los Alamos National Laboratory under Contract No. DE-AC52-06NA25396.

2 Operated by Los Alamos National Security, LLC for NNSA U N C L A S S I F I E D LA-UR-10-draft Slide 2 Introduction What’s in the ICSBEP Handbook? ENDF/B-VII.0 Data Testing Strengths, Weaknesses & What Comes Next?

3 Operated by Los Alamos National Security, LLC for NNSA U N C L A S S I F I E D LA-UR-10-draft What is in the ICSBEP Handbook? Slide 3

4 Operated by Los Alamos National Security, LLC for NNSA U N C L A S S I F I E D LA-UR-10-draft Data Testing – Fast Assemblies Slide 4

5 Operated by Los Alamos National Security, LLC for NNSA U N C L A S S I F I E D LA-UR-10-draft Data Testing – Be & Poly Reflected Solutions Slide 5

6 Operated by Los Alamos National Security, LLC for NNSA U N C L A S S I F I E D LA-UR-10-draft Data Testing – Bare & H 2 O Reflected Solutions Slide 6

7 Operated by Los Alamos National Security, LLC for NNSA U N C L A S S I F I E D LA-UR-10-draft Data Testing – 233 UO 2 /ThO 2 Lattice Slide 7

8 Operated by Los Alamos National Security, LLC for NNSA U N C L A S S I F I E D LA-UR-10-draft Data Testing – Combined Results Slide 8

9 Operated by Los Alamos National Security, LLC for NNSA U N C L A S S I F I E D LA-UR-10-draft Slide 9 Data Testing – Reaction Rate Ratios

10 Operated by Los Alamos National Security, LLC for NNSA U N C L A S S I F I E D LA-UR-10-draft Observations With ENDF/B-VII.0 Cross Sections Fast Critical Assembly calculated eigenvalues are accurate. Intermediate and Thermal Spectrum calculated eigenvalues for solution assemblies exhibit a decreasing trend with increasing average fission energy. 233 UO 2 / 232 ThO 2 fuelled lattice assembly calculated eigenvalues are accurate, but are consistent with the solution assembly trend line. 233 U(n,f) reaction rate ratios are calculated accurately. 232 Th(n,2n), (n,f) and (n,g) reaction rate ratios are not calculated accurately. Slide 10

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