D. H. Beddingfield
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View article: SIMULATIONS FOR ACTIVE INTERROGATION OF HEU IN CARGO CONTAINERS
SIMULATIONS FOR ACTIVE INTERROGATION OF HEU IN CARGO CONTAINERS Open
We describe the results of a Monte Carlo simulation 10 investigate the feasibility of using a pulsed deuterium-tritium (D-T) neutron technique for active interrogation of special nuclear material in cargo containers. Time distributions of …
View article: Recent advances in hardware and software are to improve spent fuel measurements
Recent advances in hardware and software are to improve spent fuel measurements Open
Vast quantities of spent fuel are available for safeguard measurements, primarily in Commonwealth of Independent States (CIS) of the former Soviet Union. This spent fuel, much of which consists of long-cooling-time material, is going to be…
View article: [sup 3]He neutron detector performance in mixed neutron gamma environments
[sup 3]He neutron detector performance in mixed neutron gamma environments Open
A test program of the performance of 3He neutron proportional detectors with varying gas pressures, and their response to lligh level gamma-ray exposure in a mixed neutrodgamma environment, ha$ been performed Our intent was to identie the …
View article: Source term analysis in support of safeguards approaches for uranium conversion facilities.
Source term analysis in support of safeguards approaches for uranium conversion facilities. Open
Advanced safeguards approaches require an analysis of activities that may be undertaken looking at the nuclear fuel cycle in its entirety. One example is uranium conversion facilities that are necessary to condition nuclear mateirals for f…
View article: Under-sodium viewing technology for improvement of fast-reactor safeguards
Under-sodium viewing technology for improvement of fast-reactor safeguards Open
The current safeguards approach for fast reactors relies exclusively on maintenance of continuity of knowledge to track the movement of fuel assemblies through these facilities. The remote handling of fuel assemblies, the visual opacity of…
View article: Us-Japan cooperation on safeguards
Us-Japan cooperation on safeguards Open
There is a long history of collaborative safeguards development between the United States and Japan. Japan has built, and continues to expand, the largest civil nuclear fuel cycle under full-scope IAEA safeguards in world. This development…
View article: Curium concentration in spent nuclear fuel
Curium concentration in spent nuclear fuel Open
Neutron measurements are frequently used to characterize spent nuclear fuel. Curium is the primary neutron source from most spent nuclear fuel materials. Recent developments in nuclear safeguards measurements of spent nuclear fuel have inc…
View article: Pebble bed modular reactor safeguards: developing new approaches and implementing safeguards by design
Pebble bed modular reactor safeguards: developing new approaches and implementing safeguards by design Open
The design of the Pebble Bed Modular Reactor (PBMR) does not fit or seem appropriate to the IAEA safeguards approach under the categories of light water reactor (LWR), on-load refueled reactor (OLR, i.e. CANDU), or Other (prismatic HTGR) b…
View article: Application of the sources code in nuclear safeguards
Application of the sources code in nuclear safeguards Open
The Sources Code System provides a greatly expanded calculational capacity in the field of nuclear safeguards. It is becoming more common that we are called upon to perform assays on materials for which no standards exist. These materials …
View article: Variations in AmLi source spectra and their estimation utilizing the 5 Ring Multiplicity Counter
Variations in AmLi source spectra and their estimation utilizing the 5 Ring Multiplicity Counter Open
View article: Estimating the AmLi Neutron Spectrum from Measured Ring Ratios
Estimating the AmLi Neutron Spectrum from Measured Ring Ratios Open
These are a set of slides on estimating the AmLi neutron spectrum from measured ring ratios. The IAEA uses an AmLi source in the Uranium Neutron Coincidence Collar (UNCL) to verify compliance with nonproliferation treaties. The UNCL requir…
View article: A Prescription for List-Mode Data Processing Conventions
A Prescription for List-Mode Data Processing Conventions Open
There are a variety of algorithmic approaches available to process list-mode pulse streams to produce multiplicity histograms for subsequent analysis. In the development of the INCC v6.0 code to include the processing of this data format, …