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DOE OSTI · 3022687

Assessment of Source Term Uncertainties for Criticality Monitoring Simulations of Fukushima Daiichi Fuel Debris Retrieval Operations

Rolison, Lucas Matthew [Los Alamos National Laboratory] (ORCID:0000000259458927)·Moussa, Jawad Ribhi [Los Alamos National Laboratory] (ORCID:0009000128536777)·Rising, Michael Evan [Los Alamos National Laboratory] (ORCID:0000000287122427)·Hutchinson, Jesson D. [Los Alamos National Laboratory] (ORCID:000000017364186X)
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07 ISOTOPE AND RADIATION SOURCES42 ENGINEERINGFuel DebrisFukushima DaiichiMCNPModeling & Simulation

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Rolison, Lucas Matthew [Los Alamos National Laboratory] (ORCID:0000000259458927), Moussa, Jawad Ribhi [Los Alamos National Laboratory] (ORCID:0009000128536777), Rising, Michael Evan [Los Alamos National Laboratory] (ORCID:0000000287122427), Hutchinson, Jesson D. [Los Alamos National Laboratory] (ORCID:000000017364186X). 2026-02-11. Assessment of Source Term Uncertainties for Criticality Monitoring Simulations of Fukushima Daiichi Fuel Debris Retrieval Operations. https://www.osti.gov/biblio/3022687

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Novel Method for Domestic Stable Isotope Production (CRADA #667) Final Report

This report presents the progress achieved on our chlorine isotope separation efforts in the CRADA #667 agreement. We used a microchannel distillation (MCD) packing structure to enrich HCl isotopes (H35Cl, H37Cl) and an isotachophoresis (ITP) separation to enrich ionic chloride species (35Cl- and 37Cl-). A 2 m tall MCD column was constructed and achieved 264 separation stages over several days, which is well above the goal of 50 stages outlined in the CRADA. The resulting height equivalent to a theoretical plate (HETP) was 0.76 cm. ITP tests were run ~ 24 hours and achieved a single-stage separation factor of 1.559.

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