Author: L. BondárPublisher:
ISBN:
Category :
Languages : en
Pages : 66
Book Description
Passive Neutron Assay of Plutonium by Multiplicity Counter Technique ; (theory and Practice)
Author: L. BondárStandard Test Method for Nondestructive Assay of Plutonium by Passive Neutron Multiplicity Counting
Author: Energy Research Abstracts
Author: Nondestructive Assay of Nuclear Materials for Safeguards and Security
Author: William H. GeistPublisher: Springer
ISBN: 9783031582769
Category : Science
Languages : en
Pages : 0
Book Description
This open access book describes the nondestructive assay techniques that are used for the measurement of nuclear material (primarily uranium and plutonium) for nuclear material accountancy purposes. It is a substantial revision to the so-called PANDA manual that has been a standard reference since its publication in 1991. The book covers the origin and interactions of gamma rays and neutrons as they affect nuclear measurements and also describes the theory and practice of calorimetry. The book gives a description of many instruments based on these techniques that are applied in the field. Although the basic physics has not changed since PANDA was first published, the last thirty years have seen many advances in analysis methods, instrumentation, and applications. The basic descriptions of the origin and interactions of radiation have been updated and include newer references. There have been extensive revisions of the description of gamma detection methods, attenuation correction procedures, and analysis methods, including for the measurement of uranium enrichment and the determination of plutonium isotopic composition. Extensive revisions and additions have also been made to the description of neutron detectors and to the explanation of neutron coincidence techniques. The chapter on neutron multiplicity techniques is a new addition to this edition. The applications of gamma and neutron techniques have been completely overhauled to remove obsolete systems and to include many current applications. The values of, and references to, nuclear data have been updated. This updated edition is an essential reference for academic researchers and practitioners in the field. This is an open access book.
The Design of Systems for the Determination of Plutonium by Passive Neutron Counting
Author: B. W. HootonPublisher:
ISBN: 9780705805902
Category :
Languages : en
Pages : 10
Book Description
Euro Abstracts
Author: Publications 1998
Author: Office for Official Publications of the European CommunitiesPublisher:
ISBN:
Category : European Economic Community countries
Languages : en
Pages : 458
Book Description
A Large Multiplicity Counter for the Measurement of Bulk Plutonium
Author: Publisher:
ISBN:
Category :
Languages : en
Pages : 7
Book Description
The authors have considered the problem of designing a thermal neutron counter for the neutron multiplicity measurement of large, high-mass plutonium items. Three neutron multiplicity counters have been built at Los Alamos to date; two are used for in-plant applications. The third counter is an experimental prototype and is used for research. The sample cavities of these counters can accommodate only relatively small samples. The largest item that can be measured optimally by the largest of these counters is 20 cm wide by 36 cm high. Now that the multiplicity technique has proven to be accurate and timely for the measurement of plutonium-bearing items, several facilities in the DOE complex have identified the need for larger counters. Several sources have identified a counter that could measure items contained in 30-gal. drums as the most desirable. For a multiplicity measurement to be successful, the neutron counter must have a large detection efficiency independent of changes in the neutron energy of the emitted neutrons, a short die-away time, and a uniform response over the sample cavity. These requirements have been achieved in the smaller counters by using large numbers of 3He tubes placed in concentric rings. This method can be extrapolated to a larger counter but at great expense. The authors have conducted a design study for a 30-gal. drum counter. The goal of this study is to reduce the number of 3He tubes required for such a large counter while still maintaining good measurement performance. This paper will report on the result of this study.
Publications
Author: Office for Official Publications of the European CommunitiesPublisher:
ISBN:
Category : Catalogs, Publishers'
Languages : en
Pages : 460
Book Description
Assay of Scrap Plutonium Oxide by Thermal Neutron Multiplicity Counting for IAEA Verification of Excess Materials from Nuclear Weapons Production
Author: Publisher:
ISBN:
Category :
Languages : en
Pages : 6
Book Description
The US Nonproliferation and Export Control Policy commits the US to placing under International Atomic Energy Agency (IAEA) safeguards excess nuclear materials no longer needed for the US nuclear deterrent. As of January 1,1996, the IAEA has completed Initial Physical Inventory Verification (IPIV) at the Oak Ridge Y-12 plant, the Hanford Plutonium Finishing Plant, and a plutonium storage vault at Rock Flats. Two IPIVs were performed at Hanford . This paper reports the results of thermal neutron multiplicity assay of plutonium residues during the second IPIV at Hanford. Using the Three Ring Multiplicity Counter (3RMC), measurements were performed on 69 individual cans of plutonium residues, each containing approximately 1 kg of material. Of the 69 items, 67 passed the IAEA acceptance criteria and two were selected for destructive analysis.