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Traceability Of The Nondestructive Assay Of Plutonium Using Calorimetry For Measurement Control
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Book Synopsis Traceability of the Nondestructive Assay of Plutonium Using Calorimetry for Measurement Control by :
Download or read book Traceability of the Nondestructive Assay of Plutonium Using Calorimetry for Measurement Control written by and published by . This book was released on 1977 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Calorimetry provides a method to establish the traceability of the nondestructive assay (NDA) of plutonium utilizing the traceability of calorimetric assay and its relative insensitivity to sample matrix. Efforts at Mound Laboratory to establish the traceability of the calorimetric assay of plutonium are described. Results from the Plutonium Metal Exchange Program and a calibration alternatives experiment are the basis for determining the bias between calorimetric assay and chemical assay. The probable cause of the bias is identified. Current uses of calorimetric assay for NDA measurement control and extension of calorimetry to dynamic calibration of NDA are discussed.
Download or read book Energy Research Abstracts written by and published by . This book was released on 1978 with total page 548 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis NUREG/CR. by : U.S. Nuclear Regulatory Commission
Download or read book NUREG/CR. written by U.S. Nuclear Regulatory Commission and published by . This book was released on 1977 with total page 92 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis An Evaluation of the Use of Calorimetry for Shipper-receiver Measurements of Plutonium by : W. W. Rodenburg
Download or read book An Evaluation of the Use of Calorimetry for Shipper-receiver Measurements of Plutonium written by W. W. Rodenburg and published by . This book was released on 1978 with total page 92 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Energy Research Abstracts written by and published by . This book was released on 1978 with total page 652 pages. Available in PDF, EPUB and Kindle. Book excerpt: Semiannual, with semiannual and annual indexes. References to all scientific and technical literature coming from DOE, its laboratories, energy centers, and contractors. Includes all works deriving from DOE, other related government-sponsored information, and foreign nonnuclear information. Arranged under 39 categories, e.g., Biomedical sciences, basic studies; Biomedical sciences, applied studies; Health and safety; and Fusion energy. Entry gives bibliographical information and abstract. Corporate, author, subject, report number indexes.
Book Synopsis An Evaluation of the Use of Calorimetry for Shipper-receiver Measurements of Plutonium by : W. W. Rodenburg
Download or read book An Evaluation of the Use of Calorimetry for Shipper-receiver Measurements of Plutonium written by W. W. Rodenburg and published by . This book was released on 1978 with total page 90 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Nondestructive Assay Methods for Solids Containing Plutonium by :
Download or read book Nondestructive Assay Methods for Solids Containing Plutonium written by and published by . This book was released on 1984 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Specific nondestructive assay (NDA) methods, e.g. calorimetry, coincidence neutron counting, singles neutron counting, and gamma ray spectrometry, were studied to provide the Savannah River Plant with an NDA method to measure the plutonium content of solid scrap (slag and crucible) generated in the JB-Line plutonium metal production process. Results indicate that calorimetry can be used to measure the plutonium content to within about 3% in 4 to 6 hours by using computerized equilibrium sample power predictive models. Calorimetry results confirm that a bias exists in the present indirect measurement method used to estimate the plutonium content of slag and crucible. Singles neutron counting of slag and crucible can measure plutonium to only +-30%, but coincidence neutron counting methods improve measurement precision to better than +-10% in less than ten minutes. Only four portions of a single slag and crucible sample were assayed, and further study is recommended.
Book Synopsis Calorimetric Assay Of Plutonium by :
Download or read book Calorimetric Assay Of Plutonium written by and published by . This book was released on 1977 with total page 17 pages. Available in PDF, EPUB and Kindle. Book excerpt: This report describes procedures for applying calorimetry for the control and accounting of plutonium. These procedures will be useful in establishing a measurement program to fulfill the regulatory requirements.
Book Synopsis Calorimetric Systems Designed for In-field Nondestructive Assay of Plutonium-bearing Materials by :
Download or read book Calorimetric Systems Designed for In-field Nondestructive Assay of Plutonium-bearing Materials written by and published by . This book was released on 1978 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Conventional calorimetric design measures the temperature rise of a plutonium-containing sample chamber in contact with a large water-bath heat sink. This design lacks the mobility needed by inspection personnel. The Argonne National Laboratory air-chamber isothermal calorimeters are low-thermal capacitance devices which eliminate the need for large, constant-temperature heat sinks. A bulk calorimeter designed to measure sealed containers holding up to 3 kg Pu, and a small-sample calorimeter designed to measure mixed-oxide fuel pellets and powders are discussed. The operational characteristics of these instruments are described, and the results of sample assays are presented. (2 figs., 2 tables).
Book Synopsis Measurement Control for Plutonium Isotopic Measurements Using Gamma-ray Spectrometry by :
Download or read book Measurement Control for Plutonium Isotopic Measurements Using Gamma-ray Spectrometry written by and published by . This book was released on 1985 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: 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.
Book Synopsis Importance of 241 Am Determination in the Characterization of PuO2 Standards for Calorimetric Assay by :
Download or read book Importance of 241 Am Determination in the Characterization of PuO2 Standards for Calorimetric Assay written by and published by . This book was released on 2005 with total page 11 pages. Available in PDF, EPUB and Kindle. Book excerpt: Plutonium dioxide (PuO2) standards are often used both as heat standards and isotopic standards for calorimetric assay. Calorimetric assay is the combination of the power in watts measured in a calorimeter with the effective specific power (P{sub eff}) in watts/g Pu, determined either by nondestructive gamma-ray assay or by destructive mass spectrometry, to yield the total elemental plutonium mass in the sample. To use a PuO2 sample as a heat standard for calorimetry, one must determine both the plutonium mass and P{sub eff} with very small uncertainties and then calculate the sample watts from the known plutonium mass, specific powers, and isotopic composition. Well-characterized PuO2 standards have plutonium mass values determined by analytical chemistry with a precision and accuracy on the order of 0.1%-0.2% relative to the total mass of the sample. Mass spectrometry, typically used to determine the isotopic fractions of plutonium standards, is very accurate and precise for the major isotopes but is somewhat less precise for low-abundance isotopes. The characterization of the 241Am/Pu ratio in the standard is also of great importance because 241Am can contribute significantly to P{sub eff} and to the heat output of the standard. The determination of the 241Am/Pu ratio in a plutonium-bearing sample is a process that is less standardized than mass spectrometry. There are no certified reference materials (CRMs) traceable to the national measurement system for 241Am in plutonium, and routine analytical 241Am/Pu ratio measurements often exhibit uncertainties of several percent relative to the total plutonium or greater.
Book Synopsis Nondestructive Assay Instrument for Measurement of Plutonium in Solutions by :
Download or read book Nondestructive Assay Instrument for Measurement of Plutonium in Solutions written by and published by . This book was released on 1979 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: A nondestructive assay (NDA) instrument that measures the 239Pu content in solutions, using a passive gamma-ray spectroscopy technique, has been developed and installed in the LASL Plutonium Processing Facility. A detailed evaluation of this instrument has been performed. The results show that the instrument can routinely determine 239Pu concentrations of 1 to 500 g/l with accuracies of 1 to 5% and assay times of 1 to 2 x 103 s.
Book Synopsis An Evaluation of the Use of Calorimetry for Shipper-receiver Measurements of Plutonium by :
Download or read book An Evaluation of the Use of Calorimetry for Shipper-receiver Measurements of Plutonium written by and published by . This book was released on 1977 with total page 65 pages. Available in PDF, EPUB and Kindle. Book excerpt: The purpose of this report is to evaluate the relative merit of using calorimetry for shipper-receiver (S-R) exchanges of Pu. In particular, this evaluation concentrates on the accountability and the diversion detection aspects of calorimetry. Three different modes of use were considered: (1) calorimetry alone, that is S-R exchanges based on power (wattage) measurements; (2) calorimetry plus chemical assay, similar to the present weight plus chemical assay system, and (3) calorimetry plus gamma-ray spectrometry, a totally nondestructive Pu assay method. The relative merit of ball three applications was judged using the present methods as a base case. Some of the factors considered were random and systematic errors, timeliness, costs (both operating and capital) and reliability.
Book Synopsis Calorimetry of Low Mass Pu239 Items by :
Download or read book Calorimetry of Low Mass Pu239 Items written by and published by . This book was released on 2010 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Calorimetric assay has the reputation of providing the highest precision and accuracy of all nondestructive assay measurements. Unfortunately, non-destructive assay practitioners and measurement consumers often extend, inappropriately, the high precision and accuracy of calorimetric assay to very low mass items. One purpose of this document is to present more realistic expectations for the random uncertainties associated with calorimetric assay for weapons grade plutonium items with masses of 200 grams or less.
Download or read book Nuclear Safety written by and published by . This book was released on 1982 with total page 820 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Use of Calorimetric Assay for Operational and Accountability Measurements of Pure Plutonium Metal by :
Download or read book Use of Calorimetric Assay for Operational and Accountability Measurements of Pure Plutonium Metal written by and published by . This book was released on 2010 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Plutonium pure metal products (PMP) are high purity plutonium metal items produced by electrorefining. The plutonium metal is produced as an approximately 3-kg ring. Accountability measurements for the electro-refining runs are typically balance/weight factor (incoming impure metal), chemistry (pure metal rings), and calorimetric assay or neutron counting of the crucibles and other wastes. The PMP items are qualified for their end use by extensive chemical assay. After PMP materials are made they are often sent to the vault for storage before being sent to the casting process, the next step in the production chain. The chemical assay of PMP items often takes a few weeks; however, before the metal items are allowed into the vault they must be measured. Non-destructive assay personnel measure the metals either by multiplicity neutron counting or calorimetric assay, depending on which instrument is available, thus generating comparisons between non-destructive assay and chemical assay. The suite of measurements, calorimetric assay, chemical assay, and neutron mUltiplicity counting is compared for a large group of PMP items.
Book Synopsis Integrated Nondestructive Assay Solutions for Plutonium Measurement Problems of the 21st Century by :
Download or read book Integrated Nondestructive Assay Solutions for Plutonium Measurement Problems of the 21st Century written by and published by . This book was released on 1997 with total page 25 pages. Available in PDF, EPUB and Kindle. Book excerpt: The authors describe automated and integrated nondestructive assay (NDA) systems configured to measure many of the materials that will be found in the Department of Energy complex in the dismantlement, disposition, residue stabilization, immobilization, and mixed oxide fuel programs. These systems are typified by the Advanced Recovery and Integrated Extraction System NDA system which is under construction at Los Alamos National Laboratory to measure the outputs of a weapon component dismantlement system.
