The development of KENO and the calculation of differential parameters with KENO

This paper is designed to review the origin of the KENO program, to discuss its development, to explain some reasons for its form and capabilities, and lastly, to comment on the codes capability relative to the subject of this meeting, namely neutron spectra. The original programming, which was later to become KENO, was nothing more than a few energy groups, fixed-source calculation of neutron leakage, and absorption in a right circular cylinder. Its sole purpose initially was to be used to evaluate the capabilities of several computers with regard to performing Monte-Carlo-type calculations. This original program grew to a fission source iteration that was used to evaluate single, cylindrical uranium metal units being studied by J.T. Thomas. This development was followed by providing the capability to treat arrays of cylindrical units, which was also a part of the Thomas' experimental studies. 7 refs