Projections of ENDF/B Version V Performance for Fast and Thermal Reactors Using Sensitivity Coefficients
Conference
·
OSTI ID:7062072
- Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
- Bettis Atomic Power Lab. (BAPL), West Mifflin, PA (United States)
- Argonne National Lab. (ANL), Argonne, IL (United States)
Proposed reductions to 235U($$\bar{v}$$) and 235U(n, f) in the fast energy range have significant impact for uranium fueled fast critical assemblies. The long-standing LMFBR 28c/49f calculated overprediction is not resolved by proposed Version 5 cross section modifications for 238U(n, γ) and 239Pu(n, f). The upward evaluation for the 239Pu(n, f)/235U(n, f) ratio improves criticality predictions for Pu fueled fast assemblies. For thermal reactors, changes to the 238U resonance parameters significantly reduce the long-standing 28ρ discrepancy. Reduced resonance capture in the 1 eV 240Pu resonance has significant implications for LWR fuel cycle studies.
- Research Organization:
- Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States); Bettis Atomic Power Laboratory (BAPL), West Mifflin, PA (United States); Argonne National Laboratory (ANL), Argonne, IL (United States)
- Sponsoring Organization:
- USDOE National Nuclear Security Administration (NNSA), Nuclear Criticality Safety Program (NCSP); USDOE Division of Reactor Research and Technology; Electric Power Research Inst. (EPRI), Palo Alto, CA (United States)
- DOE Contract Number:
- W-7405-ENG-26
- OSTI ID:
- 7062072
- Report Number(s):
- CONF-780401--10
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
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97 MATHEMATICS AND COMPUTING
Cross Section Evaluation Working Group (CSEWG)
EPITHERMAL REACTORS
Evaluated Nuclear Data File (ENDF)
FAST REACTORS
KINETICS
Light-Water Reactor (LWR)
Liquid Metal Fast Breeder Reactor (LMFBR)
NUCLEAR DATA COLLECTIONS
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SENPRO
SENSITIVITY
THERMAL REACTORS