GUM Analysis for TIMS and SIMS Isotopic Ratios in Graphite

Technical Report · Sun Apr 01 00:00:00 EDT 2007

DOI:https://doi.org/10.2172/1133255· OSTI ID:1133255

Heasler, Patrick G.; Gerlach, David C.; Cliff, John B.; Petersen, Steven L.

This report describes GUM calculations for TIMS and SIMS isotopic ratio measurements of reactor graphite samples. These isotopic ratios are used to estimate reactor burn-up, and currently consist of various ratios of U, Pu, and Boron impurities in the graphite samples. The GUM calculation is a propagation of error methodology that assigns uncertainties (in the form of standard error and confidence bound) to the final estimates.

• Research Organization: Pacific Northwest National Lab. (PNNL), Richland, WA (United States)
• Sponsoring Organization: USDOE
• DOE Contract Number: AC05-76RL01830
• OSTI ID: 1133255
• Report Number(s): PNNL-17036; NN2001000
• Country of Publication: United States
• Language: English