Year
1995
Abstract
Stringent regulations require that transuranic waste be accurately quantified prior to disposal. Passive coincidence counting of the spontaneous fission neutrons emitted by the even isotopes of plutonium provides an accurate and reliable assay result. The new modular WM3100 Series has been characterized by measuring stationary point sources in a grid pattern throughout the chamber and again by simulating diffuse sources in homogeneous matrices. A description of the design criteria and the results of the performance tests are reported.