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DOE OSTI · 3365145

IER 519 Experiment Execution Report: TEX Hanford

Lemke, Zachariah Rudy [Los Alamos National Laboratory (LANL), Los Alamos, NM (United States)] (ORCID:0009000680429780)·Sanchez, Rene Gerardo [Los Alamos National Laboratory (LANL), Los Alamos, NM (United States)] (ORCID:0000000288754477)·Grove, Travis Justin [Los Alamos National Laboratory (LANL), Los Alamos, NM (United States)]
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Abstract

The TEX-Hanford experiments were performed at the National Criticality Experiments Research Center (NCERC) at the Device Assembly Facility (DAF) at the Nevada Nuclear Security Site (NNSS). Three configurations were measured, with the measurements occurring in December 2025 and January 2026. The Fe-14 configuration was executed in December 2025; the Fe-11 configuration began its handstack on the Planet critical assembly machine in December 2025, but was taken critical in January 2026; the Fe-16 configuration was executed entirely in January 2026. The TEX-Hanford experiments were performed on the Planet critical assembly machine utilizing using PANN (Plutonium Aluminum No Nickel) ZPPR (Zero Power Physics Reactor) plutonium plates as fuel. The configurations were moderated with varying thicknesses of HDPE and iron absorber. This document details the configurations that were measured, preliminary reactivity measurements of the measured configurations, data files from the neutron detection systems, and results from the coordinate-measuring machine (CMM) measurements of the final stack height measurements each configuration.

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22 GENERAL STUDIES OF NUCLEAR REACTORS42 ENGINEERING519critical experimentFeHanfordPlanetTEX

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Lemke, Zachariah Rudy [Los Alamos National Laboratory (LANL), Los Alamos, NM (United States)] (ORCID:0009000680429780), Sanchez, Rene Gerardo [Los Alamos National Laboratory (LANL), Los Alamos, NM (United States)] (ORCID:0000000288754477), Grove, Travis Justin [Los Alamos National Laboratory (LANL), Los Alamos, NM (United States)]. 2026-04-02. IER 519 Experiment Execution Report: TEX Hanford. https://doi.org/10.2172/3365145

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