ISO-CART-85 Mobile Low-Level Waste Assay System
8Pages

“Complete In-Situ NDA Gamma-Ray Analysis Solutions for a Wide Variety of Samples, including “Free-Release” Decommissioning Waste.” AMETEK® ADVANCED MEASUREMENT TECHNOLOGY

ISO-CART-85 ISO-CART™-85 : A Complete Turnkey Solution ISO-CART-85 is a new mobile system for radioactive waste assay by highresolution gamma spectroscopy. Through the use of a single very-large-area high purity germanium (HPGe) detector, and a modular collimation system, ISO-CART-85 achieves, in many cases, free release levels in reasonable count times, for in-field measurements. The HPGe detector is provided in the form of the ORTEC IDM-200-V, a revolutionary all-in-one integrated Gamma Spectrometer, which requires no liquid nitrogen to cool to operational temperature. Instead, a...

ISO-CART-85 ISO-CART-II Optimized Transport System ISO-CART-II represents a generational advancement over previous models, with improvements in several areas: • Supports new and “legacy” spectrometry hardware • Lightweight materials used wherever feasible in the interests of maneuverability. • Adjustable front and rear track for extra stability even in tight spaces. • Easy assembled and disassembled for transportation. • Continuously and easily adjustable detector height and variable tilt adjustment. • Unrestricted direct detector view of ground for soil assays. • New modular collimator...

The ~50% relative efficiency HPGe detector in the IDM-200-V is of an “over-square” diameter-to-length profile. The large diameter enhances low energy efficiency. The figures below show the point source absolute efficiency curves of an IDM-200-V in comparison with a more conventionally proportioned detector of almost the same relative efficiency (51%). The IDM-200-V shows much higher efficiencies at low to medium energies, where container or matrix absorption effects are possibly the most problematic to measurements. IDM-200-V and 51% relative efficiency HPGe GEM compared: Absolute...

A Minimum Weight Approach to Collimation System weight is a major consideration in mobile assay systems which require, by definition, to be moved. As is discussed later, the ISOPLUS software operates based on the assumption that the detector “observes” a representative portion of the object through a defined “field of view” and then computes the total materials assay based on that. This requires that the FOV collimators ISO-2-IDM-FOV-X. X = 6", 4" and 2" (left to right). detector be provided with a collimator to restrict and define a suitable field of view, representative of the sample....

ISO-CART-85 ISOPLUS: Waste Assay Software for ISO-CART-II Systems • Quantitative assay of gamma-emitting waste samples with an emphasis on ease of use and practicality. • Analyze all types of gamma-emitting waste, fissile and non-fissile. • Measure containers of many shapes and sizes, surfaces and even soils; via independently verified analysis methods. • Use with any HPGe detector(s) and electronics. Available standalone or in factory pre-calibrated systems. • Calibrate ANY detector on site, TRACEABLY, in minutes. ISOPLUS provides a practical solution to a wide range of gamma-ray...

ISO-CART-85 Container Mode Operation There are two operational modes: supervisor and operator. The operator need make choices only from the minimum subset of system options defined by the supervisor. The supervisor mode defines what operations the operator is allowed to carry out. A wizard guides the supervisor through the process of setting up the operator procedures. The wizard presents the parameters on logically grouped screens, with an emphasis on clarity of approach. A "field-of-view" calculator provides a simple way to set up the detector-to-sample distance for the current...

System Performance and Detection Limits (MDAs and MDCs) Actual count times to specific detection limits will always depend on the nuclide in question, the density of the sample, the container, the counting geometry and the radioactivity in the environmental background as “seen” by the detector. The bottle counting option geometry is more closely defined than the geometry for counting waste containers. For waste containers, the limit of detection also depends on the field of view of the collimator. If the whole of the container is in the field of view of the collimator a larger field of view...