scholarly journals FY2012 L2 Milestone Report ? Modernizing the Fission Basis: Fission Product Yield Energy Dependence Measurements at TUNL

2012 ◽  
Author(s):  
David J. Vieira ◽  
Charles Arnold ◽  
Morgan C. White ◽  
Jerry B. Wilhelmy ◽  
Malcolm M. Fowler ◽  
...  
Keyword(s):  
Fission Product ◽  
Energy Dependence ◽  
Product Yield ◽  
Fission Product Yield

Reaction rate, fission product yield, and Rossi-α measurements using a HEU metal, copper reflected critical assembly

2015 ◽  
Vol 52 (7-8) ◽  
pp. 1018-1025 ◽  
Author(s):  
Rene Sanchez ◽  
John Bounds ◽  
Todd Bredeweg ◽  
Joetta Goda ◽  
Travis Grove ◽  
...  
Keyword(s):  
Fission Product ◽  
Reaction Rate ◽  
Product Yield ◽  
Critical Assembly ◽  
Fission Product Yield

scholarly journals 235U(n, f) Independent fission product yield and isomeric ratio calculated with the statistical Hauser–Feshbach theory

2018 ◽  
Vol 55 (9) ◽  
pp. 1009-1023 ◽  
Author(s):  
Shin Okumura ◽  
Toshihiko Kawano ◽  
Patrick Jaffke ◽  
Patrick Talou ◽  
Satoshi Chiba
Keyword(s):  
Fission Product ◽  
Isomeric Ratio ◽  
Product Yield ◽  
Fission Product Yield

scholarly journals Employing FREYA for fission product yield evaluations

2020 ◽  
Vol 242 ◽  
pp. 03002
Author(s):  
R. Vogt ◽  
J. Randrup ◽  
N. Vassh ◽  
T. Sprouse ◽  
R. Surman
Keyword(s):  
Fission Product ◽  
Product Yield ◽  
Fission Yield ◽  
Fission Reaction ◽  
Product Yields ◽  
Large Samples ◽  
Reaction Event ◽  
Fission Product Yields ◽  
The Future ◽  
Fission Product Yield

The fast event-by-event fission code FREYA (Fission Reaction Event Yield Algorithm) generates large samples of complete fission events while employing only a few physics-based parameters. Not only is FREYA fast, it is also flexible, able to employ a variety of input formats to test the implications of various fission yield evaluations on neutron and photon observables. We describe how FREYA was applied to the neutron-rich nuclei needed for r-process nucleosynthesis calculations as an example of this flexibility. Finally, we discuss how we plan to make use of this flexibility to extend FREYA to calculations of cumulative fission product yields to aid evaluations of these yields in the future.

scholarly journals Prompt and Delayed Neutron Emissions and Fission Product Yield Calculations with Hauser-Feshbach Statistical Decay Theory and Summation Calculation Method

2019 ◽  
Vol 211 ◽  
pp. 04005 ◽  
Author(s):  
Shin Okumura ◽  
Toshihiko Kawano ◽  
Satoshi Chiba
Keyword(s):  
Fission Product ◽  
Fission Fragment ◽  
Neutron Emission ◽  
Product Yield ◽  
Prompt Neutron ◽  
Delayed Neutron ◽  
Statistical Decay ◽  
Fission Product Yield ◽  
Neutron Multiplicities ◽  
D Model

We demonstrate the neutron emission and fission product yield calculations using the Hauser–Feshbach Fission Fragment Decay (HF3D) model and β decay. The HF3D model calculates the statistical decay of more than 500 primary fission fragment pairs formed by the neutron induced fission of 235U. In order to calculate the prompt neutron and photon emissions, the primary fission fragment distributions, i.e. mass, charge, excitation energy, spin and parity are deterministically generated and numerically integrated for all fission fragments. The calculated prompt neutron multiplicities, independent fission product yield are fully consistent each other. We combine the β-decay and the summation calculations with the HF3D model calculation to obtain the cumulative fission product yield, decay heat and delayed neutron yield. The calculated fission observables are compared with available experimental data.

scholarly journals FISSION YIELD UNCERTAINTY PROPAGATION IN MULTI-PASS REFUELING PEBBLE-BED HTGR

2021 ◽  
Vol 247 ◽  
pp. 15006
Author(s):  
Yizhen Wang ◽  
Menglei Cui ◽  
Jiong Guo ◽  
Fu Li
Keyword(s):  
Fission Product ◽  
Sampling Method ◽  
Uncertainty Propagation ◽  
Product Yield ◽  
Nuclear Data ◽  
Fission Yield ◽  
Pebble Bed ◽  
Stochastic Sampling ◽  
Fission Product Yield ◽  
Burnup Calculation

Multi-pass refueling scheme is a highlighted feature of pebble bed HTGR which spatially mixes the burnup calculation inside core. Such refueling scheme relate burnup calculation in one region of the core to others and thus affects the uncertainty propagation of nuclear data, e.g. fission product yield. In this work, thermal neutron induced U-235 fission product yield uncertainties are propagated in HTR-PM models with various refueling schemes in V.S.O.P. code. And the effect of multi-pass refueling scheme is studied. Bayesian method is applied to estimate the covariance of fission product yield based on ENDF/B-VII.1 fission yield sub-library. Uncertainty quantification is performed with stochastic sampling method and log-normal based correlated sampling method is used to generate reasonable and self-consistent fission product yield samples. The analyzed results indicate that multi-pass refueling scheme could affect the uncertainty propagation of reactor local responses.

scholarly journals Fission product yield measurements using monoenergetic photon beams

2017 ◽  
Vol 146 ◽  
pp. 04018 ◽  
Author(s):  
Krishichayan ◽  
M. Bhike ◽  
A.P. Tonchev ◽  
W. Tornow
Keyword(s):  
Fission Product ◽  
Product Yield ◽  
Photon Beams ◽  
Fission Product Yield

Bombardment Energy and Fission Product Yield Pattern for Protons on Natural Uranium andU235

1955 ◽  
Vol 99 (1) ◽  
pp. 184-187 ◽  
Author(s):  
W. H. Jones ◽  
A. Timnick ◽  
J. H. Paehler ◽  
T. H. Handley
Keyword(s):  
Fission Product ◽  
Product Yield ◽  
Natural Uranium ◽  
Fission Product Yield ◽  
Bombardment Energy

Solution of Isotopic Kinetics Problems with the Complete List of Elements in the Fission Product Yield

Atomic Energy ◽  
2016 ◽  
Vol 120 (3) ◽  
pp. 214-219 ◽  
Author(s):  
A. V. Solov’ev ◽  
E. F. Mitenkova ◽  
N. V. Novikov ◽  
E. V. Solov’eva
Keyword(s):  
Fission Product ◽  
Product Yield ◽  
Complete List ◽  
Fission Product Yield
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