ISOTOPIC CORRELATION SAFEGUARDS TECHNIQUES: REACTOR CHARACTERISTICS AS OBSERVED FROM MEASURED SPENT FUEL DATA

Families of burnup curves have been determined, based on measured isotopic composition data resulting from the chemical dissolution of spent fuel assemblies, which represent: a) Various initial weight percent b) Various reactor types - heavy water reactors, boiling water reactors and pressurized water reactors - as a function of increasing exposure. As a result, figures and tables are available which compare burnup properties of various fuels and reactor types. The figures and tables may be used to a) reactors processed at a chemical reprocessing plant, such as initial enrichment and exposure; b) Verify burnup curves which will be evident from future measured data of the reactors considered; and c) Predict the burnup curves for spent fuels from the above reactors which may be of different initial enrichment. 335U content fuels - from natural uranium to 5.0235U, andwerify stated information about future spent fuels from the above