Data Compilation for AGR-2 B&amp;W UO₂ Compact Lot LEU11-OP2-Z (Revision 1) (2010)

This document is a compilation of characterization data for the candidate AGR-2 B&W UO2 fuel compact lot LEU11-OP2-Z. The compacts were produced by ORNL for the Advanced Gas Reactor Fuel Development and Qualification (AGR) program for the second AGR irradiation test (AGR-2). This compact lot was fabricated using particle composite LEU11. LEU11 came from Babcock and Wilcox (B&W) coated particle lot G73H-10-93085B, which was an upgraded batch of TRISO-coated 500 μm nominal diameter, 9.6% low enriched uranium oxide kernels (LEU). The AGR-2 TRISO-coated particles consist of a spherical kernel coated with an ~50% dense carbon buffer layer (100 μm nominal thickness), followed by a dense inner pyrocarbon layer (40 μm nominal thickness), followed by a SiC layer (35 μm nominal thickness), followed by another dense outer pyrocarbon layer (40 μm nominal thickness). The kernels were also manufactured by B&W and identified as kernel lot G73AA-10-69308. Two data packages were submitted by B&W containing the acceptance testing results for the kernels and coated particles, these are identified by their lot numbers. A discussion on the coating of the B&W TRISO particles can also be found in INL report INL/EXT-09-16545. A data compilation of ORNL analysis of G73H-10-93085B can be found in ORNL/TM-2009/255. The AGR-2 Fuel Specification (INL SPC-923) provides the requirements necessary for acceptance of the fuel manufactured for the AGR-2 irradiation test. Section 4.3 of SPC-923 provides the property requirements for the heat treated UO2 compacts. The Statistical Sampling Plan for AGR-2 Fuel Materials (INL PLN-2691) provides additional guidance regarding statistical methods for product acceptance and recommended sample sizes. The procedures for characterizing and qualifying the compacts are outlined in ORNL product inspection plan AGRCHAR- PIP-14. The inspection report forms generated by this product inspection plan document the product acceptance for the property requirements listed in section 4.3 of SPC-923. Prior to compacting, the overcoated particles are characterized per ORNL product inspection plan AGRCHAR- PIP-11 to obtain data needed for calculation of compacting charge weight and matrix density. Riffling of compact charges is also covered by this procedure. Prior to overcoating, the TRISO particles are characterized per ORNL product inspection plan AGR-CHAR-PIP-10 to determine uranium content, obtain data needed for overcoating and compact fabrication, and obtain further data needed for calculation of matrix density. Riffling of overcoater charges is also covered by this procedure. This document contains all the inspection report forms and data report forms generated by these inspection plans. In addition to the characterization data, this report also contains other records relevant to the fuel product acceptance. A history of the material flow and sample naming is included. The overcoating and compacting process is summarized, and a record of the materials used to make the matrix is included. A Certificate of Conformance and any applicable Nonconformance Reports are attached as Appendices.