Calculation of Isotopic Bias and Uncertainty for BWR SNF
| Attachment | Size |
|---|---|
| CAL-DSU-NU-000003 REV 0A.pdf (981.5 KB) | 981.5 KB |
The objective of Calculation of Isotopic Bias and Uncertainty for BWR SNF is to quantify the computational bias and uncertainty in the multiplication factor (keff) to be used for Boiling Water Reactor (BWR) spent nuclear fuel (SNF) burn-up credit. The scope of this bias and uncertainty determination covers 38 different radiochemical assay (RCA) spent fuel samples from 14 different fuel assemblies that were irradiated in four different BWRs. The irradiated fuel samples evaluated span an enrichment range of 2.53 weight percent U-235 through 3.95 weight percent U-235. They contain gadolinium content up to 5 weight percent Gd and burn-ups from 2.16 Gigawatt days per metric ton (GWd/MTU) to 65.5 (GWd/MTU).
This report is an engineering calculation supporting the development of analyses to be used for License Application of the monitored geologic repository, and was performed under OCRWM procedure AP-3.12Q, Design Calculations and Analyses. This calculation is subject to Quality Assurance Requirements and Description (DOE 2003), per the activity evaluation under Technical Work Plan for: Risk and Criticality Department (BSC 2003b).
