Two Plutonium-Metal Critical Assemblies

G. A. Jarvis; G. A. Linenberger; J. D. Orndoff; H. C. Paxton

doi:dx.doi.org/10.13182/NSE60-A25840

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Home / Publications / Journals / Nuclear Science and Engineering / Volume 8 / Number 6

Two Plutonium-Metal Critical Assemblies

G. A. Jarvis, G. A. Linenberger, J. D. Orndoff, H. C. Paxton

Nuclear Science and Engineering / Volume 8 / Number 6 / December 1960 / Pages 525-531

Technical Paper / dx.doi.org/10.13182/NSE60-A25840

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Two plutonium-metal critical assemblies have been studied at the Pajarito site in Los Alamos. Part I of this article describes Jezebel, the bare plutonium assembly, and gives its observed characteristics along with a few comparisons with enriched-uranium systems. Part II covers Popsy, a plutonium core in a thick normal-uranium reflector. As Popsy was relatively inflexible—intended only for a preliminary survey—its experimental program was much less complete than that of Jezebel.