Exploring a New Option for Improving Detection of Highly Enriched Uranium

2018 ◽  
Author(s):  
S A Kreek
Keyword(s):  
Enriched Uranium

scholarly journals Separation of Lanthanide Isotopes from Mixed Fission Product Samples

Separations ◽  
2021 ◽  
Vol 8 (7) ◽  
pp. 104
Author(s):  
Leah M. Arrigo ◽  
Jun Jiang ◽  
Zachary S. Finch ◽  
James M. Bowen ◽  
Staci M. Herman ◽  
...  
Keyword(s):  
Fission Product ◽  
Fission Products ◽  
Nuclear Data ◽  
Product Analysis ◽  
Data Production ◽  
Thermal Irradiation ◽  
Nuclear Events ◽  
Lanthanide Separation ◽  
Enriched Uranium ◽  
Fission Yields

The measurement of radioactive fission products from nuclear events has important implications for nuclear data production, environmental monitoring, and nuclear forensics. In a previous paper, the authors reported the optimization of an intra-group lanthanide separation using LN extraction resin from Eichrom Technologies®, Inc. and a nitric acid gradient. In this work, the method was demonstrated for the separation and quantification of multiple short-lived fission product lanthanide isotopes from a fission product sample produced from the thermal irradiation of highly enriched uranium. The separations were performed in parallel in quadruplicate with reproducible results and high decontamination factors for 153Sm, 156Eu, and 161Tb. Based on the results obtained here, the fission yields for 144Ce, 153Sm, 156Eu, and 161Tb are consistent with published fission yields. This work demonstrates the effectiveness of the separations for the intended application of short-lived lanthanide fission product analysis requiring high decontamination factors.

Characterisation of Enriched Uranium Dioxide Particles from a Uranium Handling Facility

1998 ◽  
Vol 79 (1) ◽  
pp. 57-62 ◽  
Author(s):  
M.D. Hoover ◽  
G.J. Newton ◽  
R.A. Guilmette ◽  
R.J. Howard ◽  
R.N. Ortiz ◽  
...  
Keyword(s):  
Uranium Dioxide ◽  
Enriched Uranium

Measurements of Thermal Utilization, Resonance Escape Probability, and Fast Effect in Water-Moderated, Slightly Enriched Uranium and Uranium Oxide Lattices

1958 ◽  
Vol 3 (4) ◽  
pp. 403-427 ◽  
Author(s):  
D. Klein ◽  
A. Z. Kranz ◽  
G. G. Smith ◽  
W. Baer ◽  
J. DeJuren
Keyword(s):  
Uranium Oxide ◽  
Escape Probability ◽  
Enriched Uranium

scholarly journals Reactor Core Conceptual Design for a Scalable Heating Experimental Reactor, LUTHER

2021 ◽  
Vol 2 (2) ◽  
pp. 207-214
Author(s):  
Thinh Truong ◽  
Heikki Suikkanen ◽  
Juhani Hyvärinen
Keyword(s):  
Low Temperature ◽  
Conceptual Design ◽  
Nuclear Power ◽  
Water Pressure ◽  
Reactor Core ◽  
Electricity Production ◽  
Design Parameters ◽  
Experimental Reactor ◽  
Fuel Assemblies ◽  
Enriched Uranium

In this paper, the conceptual design and a preliminary study of the LUT Heating Experimental Reactor (LUTHER) for 2 MWth power are presented. Additionally, commercially sized designs for 24 MWth and 120 MWth powers are briefly discussed. LUTHER is a scalable light-water pressure-channel reactor designed to operate at low temperature, low pressure, and low core power density. The LUTHER core utilizes low enriched uranium (LEU) to produce low-temperature output, targeting the district heating demand in Finland. Nuclear power needs to contribute to the decarbonizing of the heating and cooling sector, which is a much more significant greenhouse gas emitter than electricity production in the Nordic countries. The main principle in the development of LUTHER is to simplify the core design and safety systems, which, along with using commercially available reactor components, would lead to lower fabrication costs and enhanced safety. LUTHER also features a unique design with movable individual fuel assembly for reactivity control and burnup compensation. Two-dimensional (2D) and three-dimensional (3D) fuel assemblies and reactor cores are modeled with the Serpent Monte Carlo reactor physics code. Different reactor design parameters and safety configurations are explored and assessed. The preliminary results show an optimal basic core design, a good neutronic performance, and the feasibility of controlling reactivity by moving fuel assemblies.

The Current Status of Converting the University of Missouri Research Reactor from Highly Enriched Uranium to Low-Enriched Uranium Fuel

2020 ◽  
Author(s):  
A. Moisseytsev ◽  
D. Yoon ◽  
E. Feldman ◽  
J. Stillman ◽  
K. Kutikkad ◽  
...  
Keyword(s):  
Research Reactor ◽  
Current Status ◽  
University Of Missouri ◽  
Uranium Fuel ◽  
Enriched Uranium ◽  
The University

scholarly journals Radiation and criticality safety analyses for the highly-enriched uranium core removal from a research reactor

2017 ◽  
Vol 129 ◽  
pp. 152-155 ◽  
Author(s):  
Haile Dennis ◽  
Charles Grant ◽  
John Preston
Keyword(s):  
Research Reactor ◽  
Enriched Uranium ◽  
Criticality Safety

Consistent evaluation of modern nuclear data libraries for criticality safety analyses of thermal compound low-enriched-uranium systems

2008 ◽  
Vol 35 (10) ◽  
pp. 1831-1841 ◽  
Author(s):  
Edwin Kolbe ◽  
Alexander Vasiliev ◽  
Hakim Ferroukhi ◽  
Martin A. Zimmermann
Keyword(s):  
Nuclear Data ◽  
Enriched Uranium ◽  
Data Libraries ◽  
Nuclear Data Libraries ◽  
Criticality Safety
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