Argonne National Laboratory Works on Designing, Testing, and Initial Operation of the Reactor Plant (feb 20, 1955 – feb 5, 1959)

Description:

Initial critical operation took place on August 11, 1953, and test operations culminated in a
500 hour run which terminated in December, 1958. Argonne's official role ended on February 5, 1959, when Combustion
Engineering, Inc., assumed contractual responsibility for the plant. While Argonne has had no official responsibility since this time, its employees have, on several occasions, visited the reactor site to observe fuel inspection or have otherwise reviewed plant performance.

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