Author: John G. FleissnerPublisher:
ISBN:
Category :
Languages : en
Pages : 8
Book Description
Measurement Control for Plutonium Isotopic Measurements Using Gamma-ray Spectrometry
Author: John G. FleissnerMeasurement Control for Plutonium Isotopic Measurements Using Gamma-ray Spectrometry
Author: Publisher:
ISBN:
Category :
Languages : en
Pages :
Book Description
A measurement control (MC) program should be an integral part of every nondestructive assay measurement system used for the assay of special nuclear materials. This report describes an MC program for plutonium isotopic composition measurements using high-resolution gamma-ray spectroscopy. This MC program emphasizes the standardization of data collection procedures along with the implementation of internal and external measurement control checks to provide the requisite measurement quality assurance. This report also describes the implementation of the MC program in the isotopic analysis code GRPAUT. Recommendations are given concerning the importance and frequency of the various MC checks in order to ensure a successful implementation of the MC procedures for the user's application.
Determination of Plutonium Isotopic Composition by Gamma-ray Spectroscopy
Author: Publisher:
ISBN:
Category :
Languages : en
Pages :
Book Description
We discuss the general approach, computerized data analysis methods, and results of measurements used to determine the isotopic composition of plutonium by gamma-ray spectroscopy. The simple techniques are designed to be applicable to samples of arbitrary size, geometry, age, chemical, and isotopic composition. The combination of the gamma spectroscopic measurement of isotopic composition coupled with calorimetric measurement of total sample power is shown to give a totally nondestructive determination of sample plutonium mass with a precision of 0.6% for 1000-g samples of PuO2 with 12% 24°Pu content. The precision of isotopic measurements depends upon many factors, including sample size, sample geometry, and isotopic content. Typical ranges are found to be 238Pu, 1 to 10%; 239Pu, 0.1 to 0.5%; 24°Pu, 2 to 5%; 241Pu, 0.3 to 0.7%; 242Pu (determined by isotopic correlation); and 241Am, 0.2 to 10%.
Measurement of Plutonium and Uranium Isotopic Abundances by Gamma-ray Spectrometry
Author: Publisher:
ISBN:
Category :
Languages : en
Pages : 7
Book Description
The isotopic composition of plutonium and uranium is needed for purposes of sample confirmation, or for interpreting results from calorimeters or neutron-coincidence measurement instruments to determine nuclear material mass. The authors have developed measurement methods and computer codes utilizing high-resolution gamma-ray spectrometry to measure the relative isotopic abundances of plutonium and uranium in various forms nondestructively. The computer codes, known as MGA and MGAU, have unique analysis methodologies that the authors briefly describe in this paper.
Status of Plutonium Isotopic Measurements by Gamma-ray Spectrometry
Author: Plutonium Isotopic Measurements by Gamma-ray Spectroscopy
Author: FRAM (Fixed Energy, Response Function Analysis with Multiple Efficiency)
Author: Publisher:
ISBN:
Category :
Languages : en
Pages : 10
Book Description
We describe the characteristics and features and demonstrate the performance of a new code (FRAM) for determining the isotopic composition of plutonium using gamma-ray spectroscopy. This versatile code can measure an extremely wide range of isotopic compositions and is extremely easy to tailor to specialized measurement conditions. Measurement precision, accuracy, and throughput are significantly improved over previous Los Alamos National Laboratory (LANL) codes. 13 refs., 2 figs., 4 tabs.
An Evaluation of the Use of Calorimetry for Shipper-receiver Measurements of Plutonium
Author: W. W. RodenburgPublisher:
ISBN:
Category : Calorimeters
Languages : en
Pages : 90
Book Description
Passive Nondestructive Assay of Nuclear Materials
Author: Doug ReillyPublisher:
ISBN: 9780160327247
Category : Non-destructive testing
Languages : en
Pages : 700
Book Description
Gamma Spectrometric Methods for Measuring Plutonium
Author: Publisher:
ISBN:
Category :
Languages : en
Pages :
Book Description
Nondestructive analyses of plutonium can be made by detecting and measuring the gamma rays emitted by a sample. Although qualitative and semiquantitative assays can be performed with relative ease, only recently have methods been developed, using computer analysis techniques, that provide quantitative results. This paper reviews some new techniques developed for measuring plutonium. The features of plutonium gamma-ray spectra are reviewed and some of the computer methods used for spectrum analysis are discussed. The discussion includes a description of a powerful computer method of unfolding complex peak multiplets that uses the standard linear least-squares techniques of data analysis. This computer method is based on the generation of response profiles for the isotopes composing a plutonium sample and requires a description of the peak positions, relative intensities, and line shapes. The principles that plutonium isotopic measurements are based on are also developed, followed by illustrations of the measurement procedures as applied to the quantitative analysis of plutonium liquid and solid samples.