Author:
Publisher:
ISBN:
Category :
Languages : en
Pages :
Book Description
This document is intended to serve as a comprehensive applications guide to passive neutron multiplicity counting, a new nondestructive assay (NDA) technique developed over the past ten years. The document describes the principles of multiplicity counter design, electronics, and mathematics. Existing counters in Department of Energy (DOE) facilities are surveyed, and their operating requirements and procedures and defined. Current applications to plutonium material types found in DOE facilities are described, and estimates of the expected assay precision and bias are given. Lastly, guidelines for multiplicity counter selection and procurement are summarized. The document also includes a detailed collection of references on passive neutron coincidence and multiplicity publications over the last ten to fifteen years.
Application Guide to Neutron Multiplicity Counting
Author:
Publisher:
ISBN:
Category :
Languages : en
Pages :
Book Description
This document is intended to serve as a comprehensive applications guide to passive neutron multiplicity counting, a new nondestructive assay (NDA) technique developed over the past ten years. The document describes the principles of multiplicity counter design, electronics, and mathematics. Existing counters in Department of Energy (DOE) facilities are surveyed, and their operating requirements and procedures and defined. Current applications to plutonium material types found in DOE facilities are described, and estimates of the expected assay precision and bias are given. Lastly, guidelines for multiplicity counter selection and procurement are summarized. The document also includes a detailed collection of references on passive neutron coincidence and multiplicity publications over the last ten to fifteen years.
Publisher:
ISBN:
Category :
Languages : en
Pages :
Book Description
This document is intended to serve as a comprehensive applications guide to passive neutron multiplicity counting, a new nondestructive assay (NDA) technique developed over the past ten years. The document describes the principles of multiplicity counter design, electronics, and mathematics. Existing counters in Department of Energy (DOE) facilities are surveyed, and their operating requirements and procedures and defined. Current applications to plutonium material types found in DOE facilities are described, and estimates of the expected assay precision and bias are given. Lastly, guidelines for multiplicity counter selection and procurement are summarized. The document also includes a detailed collection of references on passive neutron coincidence and multiplicity publications over the last ten to fifteen years.
Application of Neutron Multiplicity Counting Experiments to Optimal Cross Section Adjustments
Application of Neutron Multiplicity Counting to Waste Assay
Author:
Publisher:
ISBN:
Category :
Languages : en
Pages : 17
Book Description
This paper describes the use of a new figure of merit code that calculates both bias and precision for coincidence and multiplicity counting, and determines the optimum regions for each in waste assay applications. A tunable multiplicity approach is developed that uses a combination of coincidence and multiplicity counting to minimize the total assay error. An example is shown where multiplicity analysis is used to solve for mass, alpha, and multiplication and tunable multiplicity is shown to work well. The approach provides a method for selecting coincidence, multiplicity, or tunable multiplicity counting to give the best assay with the lowest total error over a broad spectrum of assay conditions.
Publisher:
ISBN:
Category :
Languages : en
Pages : 17
Book Description
This paper describes the use of a new figure of merit code that calculates both bias and precision for coincidence and multiplicity counting, and determines the optimum regions for each in waste assay applications. A tunable multiplicity approach is developed that uses a combination of coincidence and multiplicity counting to minimize the total assay error. An example is shown where multiplicity analysis is used to solve for mass, alpha, and multiplication and tunable multiplicity is shown to work well. The approach provides a method for selecting coincidence, multiplicity, or tunable multiplicity counting to give the best assay with the lowest total error over a broad spectrum of assay conditions.
The Application of Neutron Multiplicity Counting to the Assay of Bulk Plutonium Bearing Materials at RFETS and LLNL.
Author:
Publisher:
ISBN:
Category :
Languages : en
Pages : 8
Book Description
In the past several years, several facilities have identified a need for a large multiplicity counter to support safeguards of excess weapons materials and the measurement control and accountability of large, unusual samples. The authors have designed and fabricated two large thermal neutron multiplicity counters to meet this need at two DOE facilities. The first of these counters was built for Rocky Flats Environmental Test Site for use in the initial inventory inspection of excess weapons plutonium offered to International Atomic Energy Agency safeguards. The second counter was built for the Lawrence Livermore National Laboratory (LLNL) to support their material control and accountability program. For the LLNL version of the counter, a removable, fast-neutron interrogation assembly was added for the measurement of large uranium samples. In the passive mode these counters can accommodate samples in containers as large as a 30-gal. drum. This paper reports on the measured performance of these two counters and the data obtained with them.
Publisher:
ISBN:
Category :
Languages : en
Pages : 8
Book Description
In the past several years, several facilities have identified a need for a large multiplicity counter to support safeguards of excess weapons materials and the measurement control and accountability of large, unusual samples. The authors have designed and fabricated two large thermal neutron multiplicity counters to meet this need at two DOE facilities. The first of these counters was built for Rocky Flats Environmental Test Site for use in the initial inventory inspection of excess weapons plutonium offered to International Atomic Energy Agency safeguards. The second counter was built for the Lawrence Livermore National Laboratory (LLNL) to support their material control and accountability program. For the LLNL version of the counter, a removable, fast-neutron interrogation assembly was added for the measurement of large uranium samples. In the passive mode these counters can accommodate samples in containers as large as a 30-gal. drum. This paper reports on the measured performance of these two counters and the data obtained with them.
The Application of Neutron Multiplicity Counting to the Assay of Bulk Plutoniu Bearing Materials at RFETS and LLNL.
Improving the Accuracy of Neutron Multiplicity Counting
Author: Scott Lawrence Stewart
Publisher:
ISBN:
Category : Neutron counters
Languages : en
Pages : 38
Book Description
Publisher:
ISBN:
Category : Neutron counters
Languages : en
Pages : 38
Book Description
Variations of Point Model Analysis in Neutron Multiplicity Counting and On-going Theoretical Develoments
Variations of Point Model Analysis in Neutron Multiplicity Counting and On-going Theoretical Developments
Neutron Multiplicity Counter Development
Author:
Publisher:
ISBN:
Category :
Languages : en
Pages : 7
Book Description
We have designed and built two multiplicity counters to test the usefulness of multiplicity counting for the safeguards assay of plutonium-bearing materials. The first prototype counter has been characterized and a variety of plutonium-bearing materials have been measured with it. Assays accurate to (approximately)0.7% have been obtained for both pure and impure plutonium oxide samples in reasonable measurement times. Assays accurate to (approximately)5% have been obtained for metal samples. A second multiplicity counter has been designed using experience gained from the first as well as Monte Carlo simulations. The second counter was designed to be more suitable for in-plant measurement of pyrochemical process materials. This paper presents the results of characterization studies of the two instruments. 10 refs., 9 figs., 2 tabs.
Publisher:
ISBN:
Category :
Languages : en
Pages : 7
Book Description
We have designed and built two multiplicity counters to test the usefulness of multiplicity counting for the safeguards assay of plutonium-bearing materials. The first prototype counter has been characterized and a variety of plutonium-bearing materials have been measured with it. Assays accurate to (approximately)0.7% have been obtained for both pure and impure plutonium oxide samples in reasonable measurement times. Assays accurate to (approximately)5% have been obtained for metal samples. A second multiplicity counter has been designed using experience gained from the first as well as Monte Carlo simulations. The second counter was designed to be more suitable for in-plant measurement of pyrochemical process materials. This paper presents the results of characterization studies of the two instruments. 10 refs., 9 figs., 2 tabs.
Handbook of Radioactivity Analysis
Author: Michael F. L'Annunziata
Publisher: Academic Press
ISBN: 0123848733
Category : Medical
Languages : en
Pages : 1420
Book Description
Authoritative reference providing the principles, practical techniques, and procedures for the accurate measurement of radioactivity.
Publisher: Academic Press
ISBN: 0123848733
Category : Medical
Languages : en
Pages : 1420
Book Description
Authoritative reference providing the principles, practical techniques, and procedures for the accurate measurement of radioactivity.