Update on NNL TSL Evaluations and Validation [Slides]
- Naval Nuclear Lab., Howe, ID (United States)
12 new/revised TSL evaluations were contributed to ENDF/B-VIII.1. The thermal diffusion length $$L$$ is an integral property of a single material’s absorption and scattering cross sections (both differential and integral). No other neutron reactions or materials are involved. The MC21-calculated $$L$$ for water is consistent with the spread of experimental data and is sufficiently sensitive to different H-H2O TSL physics models to use the method as a TSL integral performance benchmark. Modern high-quality diffusion experiments at elevated $$T$$ would allow direct low-cost physics benchmarking of water TSLs when public elevated-$$T$$ critical benchmarks are limited. NNL is working with LLNL and RPI to develop experimental PNDA capability. An ICSBEP Fundamental Physics benchmark of the Nassar and Murphy PNDA experiment is being developed to provide an example of how to evaluate these type of benchmarks.
- Research Organization:
- Naval Nuclear Lab., Howe, ID (United States)
- Sponsoring Organization:
- USDOE National Nuclear Security Administration (NNSA), Nuclear Criticality Safety Program (NCSP)
- DOE Contract Number:
- 89233018CNR000004
- OSTI ID:
- 1901783
- Country of Publication:
- United States
- Language:
- English
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