2 x 2 Polyethylene Reflected and Moderated Highly Enriched Uranium System with Rhenium

Ellis, A. Nichole ; Hutchinson, Jesson ; Bess, John D. ; Polyakov, Dmitry N. ; Glushkov, Evgeny S. ; Glushkov, Alexey E.

Idaho National Laboratory

关键词: Criticality;    Icsbep;    Polyethylene;    Planet;    Lanl;   

DOI  :  10.2172/1004277
RP-ID  :  INL/EXT-10-17642
RP-ID  :  DE-AC07-05ID14517
RP-ID  :  1004277

美国|英语

来源: UNT Digital Library

【 摘 要 】

The 2 × 2 array HEU-Re experiment was performed on the Planet universal critical assembly machine on November 4th, 2003 at the Los Alamos Critical Experiments Facility (LACEF) at Los Alamos National Laboratory (LANL). For this experiment, there were 10 ½ units, each full unit containing four HEU foils and two rhenium foils. The top unit contained only two HEU foils and two rhenium foils. A total of 42 HEU foils were used for this experiment. Rhenium is a desirable cladding material for space nuclear power applications. This experiment consisted of HEU foils interleaved with rhenium foils and is moderated and reflected by polyethylene plates. A unit consisted of a polyethylene plate, which has a recess for rhenium foils, and four HEU foils in a single layer in the top recess of each polyethylene plate. The Planet universal criticality assembly machine has been previously used in experiments containing HEU foils interspersed with SiO2 (HEU-MET-THERM-001), Al (HEU-MET-THERM-008), MgO (HEU-MET-THERM-009), Gd foils (HEU-MET-THERM-010), 2 × 2 × 26 Al (HEU-MET-THERM-012), Fe (HEU-MET-THERM-013 and HEU-MET-THERM-015), 2 × 2 × 23 SiO2 (HEU-MET-THERM-014), 2 × 2 × 11 hastalloy plates (HEU-MET-THERM-016), and concrete (HEU-MET-THERM-018). The 2 × 2 array of HEU-Re is considered acceptable for use as a benchmark critical experiment.