Author: M. F. BanhamPublisher:
ISBN:
Category :
Languages : en
Pages : 30
Book Description
The determination of the isotopic composition of plutonium by gamma-ray spectrometry
Standard Test Method for Determination of Plutonium Isotopic Composition by Gamma-Ray Spectrometry
Author: 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.
PC
Author: Publisher:
ISBN:
Category :
Languages : en
Pages : 10
Book Description
The Safeguards Program at Los Alamos National Laboratory has developed versatile software for the isotopic analysis of SNM in a sample. The FRAM code has been used routinely at LANL for years. Its capability has now been greatly expanded, and it has been given a graphical user interface. Some of the details on the internal workings of the code are given in this paper.
Determination of Plutonium Isotopic Abundances by Gamma-ray Spectrometry
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.
Determination of Plutonium Concentration and Isotopic Compositions by Isotope Dilution Gamma-ray Spectroscopy on Resin Beads
Author: T. K. LiPublisher:
ISBN:
Category : Gamma ray spectrometry
Languages : en
Pages : 16
Book Description
Measurement 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.
PC/FRAM
Author: Publisher:
ISBN:
Category :
Languages : en
Pages : 11
Book Description
We describe the new capability of and.present measurement results from the PC/FRAM plutonium isotopic analysis code. This new code allows data acquisition from a single coaxial germanium detector and analysis over an energy range from 120 keV to above I MeV. For the first time we demonstrate a complete isotopic analysis using only gamma rays greater than 200 keV in energy. This new capability allows the measurement of the plutonium isotopic composition of items inside shielded or heavy-walled containers without having to remove the items from the container. This greatly enhances worker safety by reducing handling and the resultant radiation exposure. Another application allows international inspectors to verify the contents of items inside sealed, long-term storage containers that may not be opened for national security or treaty compliance reasons. We present measurement results for traditional planar germanium detectors as well as coaxial detectors measuring shielded and unshielded samples.