This paper describes the development work, and design and engineering tasks performed, to provide a fully automated sampling system for the Waste Treatment Plant (WTP) project at the Hanford Site in southeastern Washington State, USA. WTP is being built to enable the emptying and immobilization of highly active waste resulting from processing of irradiated nuclear fuel since the 1940s. The Hanf...

This paper demonstrates, through MCNPX simulations, that a compact hexagonal array of detectors can be utilized to do both gamma isotopic identification (ID) along with neutron identification while simultaneously finding the direction of the source relative to the detector array. The detector array itself is composed of seven borated polyvinyl toluene (PVT) hexagonal light pipes approximately 4...

This paper presents a model-based approach to the problem of the optimal choice of a spatial sampling design in the presence of uncertainty about the distribution of the observations. Our approach, which is based on the polar spectral decomposition of stationary isotropic random fields, makes it possible to represent the spatial error process by a linear regression model with (infinitely many) ...