Calorimetry exchange program quarterly data report, first quarter CY93

Abstract

The goals of the Calorimetry Sample Exchange Program are: Discuss measurement differences; Review and improve analytical measurements and methods; Discuss new measurement capabilities; Provide data to DOE on measurement capabilities to evaluate shipper-receiver differences; Provide characterized or standard materials as necessary for exchange participants; and Provide a measurement control program for plutonium analysis. A sample of Plutonium Dioxide powder is available at each participating site for NDA measurement, including either or both calorimetry and high-resolution gamma-ray spectroscopy, the elements which are typically combined to provide a calorimetric assay of plutonium. The facilities measure the sample as frequently and to the level of precision which they desire, and then submit the data to the Exchange for analysis. The data report includes summary tables for each measurement and charts showing the performance of each laboratory. Comparisons are made to the accepted values for the exchange sample and to data previously reported by that laboratory. This information is presented, in the form of quarterly and annual reports, intended for use by Exchange participants in measurement control programs, or to indicate when bias corrections may be appropriate. No attempt, however, has been made to standardize methods or frequency of data collection, calibration, or operating procedures. Direct comparisons between laboratories may, therefore, be misleading since data have not been collected to the same precision or for the same time periods. A meeting of the participants of the Calorimetry Exchange is held annually at EG&G Mound Applied Technologies. The purposes of this meeting are to discuss measurement differences, problems, and new measurement capabilities, and to determine the additional activities needed to fulfill the goals of the Exchange. This quarterly report provides data for the first quarter of 1993.