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The liquid thermal diffusion uranium isotope separation method.
"Pursuant to attached letter of June 3 from
Gen. Groves, JBC and W. K. L. [Warren K. Lewis] Discussed with E. O. L. &
the top [Oak Ridge] Tennessee people the relation of the NRL
process (later to be called the Abelson-Gunn process) to the electromagnetic
process. It was agreed that the use of the expanded Phila. [Philadelphia] plant to produce 0.70% feed
was of first importance and by itself would increase the output before July
1, 1945 appreciably. The question was also raised of building a NRL plant to
operate on the [boiler] house of the [gaseous] diffusion plant at Tennessee. It was
pointed out that for small enrichment this process was
economical but for large enrichment almost impossible because of coal
consumption and long hold-up time. it was
recommended to Gen. Groves that a plant be built at Tennessee to feed in the electromagnetic
plant enriched material thereby perhaps doubling the output of providing
insurance against failure of the [gaseous] diffusion plant to come in on
Manuscript of James Conant, "Historical note on introduction of the
"Curves give the
anticipated possible production of the Navy plant, with the 100 tubes
connected in parallel, based on the data presented in Columbia Report No.
4-R-104 for tubes and operating conditions at NRL most nearly comparable to
those to be used at Philadelphia."
Attached to 1944, June 3 Memorandum of Mssrs. W. K. Lewis, E. V. Murphree and
R. C. Tolman to Major General L. R. Groves. SECRET.
Subject: Possible Utilization of Navy Pilot Thermal Diffusion Plant