Holdup measurement for nuclear fuel manufacturing plants

This paper describes holdup measurements, which combine features of detective work, a treasure hunt, and a lot of detailed measurements performed under often unpleasant circumstances. The term ''holdup'' as applied in the nuclear industry refers to the various chemical forms of uranium or plutonium or perhaps other ''special nuclear material'' (SNM) which become deposited in process equipment, duct work, walls, floors and ceilings of a nuclear manufacturing plant during its operation. 9 refs