In-plant source term measurements at four PWR's. Topical report

This report presents results of studies obtained at four pressurized water reactors (PWR's) as part of the in-plant source term measurement program in operating PWR's. The work was conducted for the Office of Nuclear Regulatory Research in support of the Effluent Treatment Systems Branch of the Office of Nuclear Reactor Regulation. The primary objective of this program is to provide the Nuclear Regulatory Commission (NRC) with operational data that can be used in evaluation of plant designs for liquid and gaseous waste treatment systems. The results and conclusions presented herein are based on data obtained at the Fort Calhoun, Zion, Turkey Point, and Rancho Seco nuclear generating stations. Results presented include radionuclide concentrations in liquid streams; airborne releases; decontamination factors for demineralizers, evaporators, liquid filters, charcoal filters, and HEPA filters; spikes in reactor coolant concentrations induced by power transients; and a study of primary-to-secondary leaks. Models to predict behavior of evaporators and demineralizers and iodine deposition on and resuspension from containment surfaces are developed.