Hanford Immobilized LAW Product Acceptance: Initial Tanks Focus Area Testing Data Package

Hanford Immobilized LAW Product Acceptance: Tanks Focus Area Testing Data Package II

“…This status report provides the results of a continuing study to help determine the composition range of LAW glasses that will meet performance expectations of the Hanford site burial facility. This is a continuation of the Hanford Immobilized Low Activity Waste (LAW) Product Acceptance (HLP): Initial Tanks Focus Area Testing Data Package (Vienna et al 2000). In addition to new 5000-h product consistency test (PCT), vapor hydration test (VHT), and alteration products data, some previously reported data together with relevant background information are included for an easily accessible source of reference when comparing the response of the various glasses to different test conditions.…”

“…The target glass compositions are compared to measured compositions in Appendix A. Vienna et al (2000) describe the procedures and preliminary results for glass fabrication, heat treatment, VHTs, PCTs, and analyses of phase assemblages, density, redox, and glass compositions. Sections 2.1 through 2.4 highlight the fabrication, heat treatment, PCT, VHT, and alteration product identification procedures that are important to data interpretation; any updates to those methods are discussed.…”

“…Hanford LAW product acceptance (HLP) glasses HLP-46, -47, -52, -54, and -55 were not heat treated (to maintain the same thermal history of the glasses previously tested with the same compositions), but bars were cast and annealed for 2 h at roughly 10ºC above the glass-transition temperature and slow cooled to room temperature. Glasses HLP-44 and -45 were batched with a targeted ratio of FeO to Fe 2 O 3 and melted and heat treated in a controlled atmosphere furnace with CO/CO 2 ratios described in Vienna et al (2000). This procedure was used at the Savannah River Technology Center (SRTC) to fabricate glasses HLP-13 to HLP-25 and at Pacific Northwest National Laboratory (PNNL) to fabricate the remaining glasses.…”

“…A modified PCT-B series was conducted on the matrix of HLP glasses. These tests differed from the PCT-A series previously described by Vienna et al (2000) in that S/V was increased from 2000 m −1 to 20 000 m −1 , and the tests were carried out at intervals of 10, 100, 1000, and 5000 h rather than the standard 7 days for PCT-A. The measured elemental concentrations for these solutions are found in Appendix Tables B-3 through B-6.…”

“…Vienna et al (1999) described the initial program plan and accounted for the expert panel suggestions on implementation strategy. Vienna et al (2000) provided an initial data package from this study, and Brown et al (2000) summarized the mid-program review by the expert panel.…”