In situ vitrification of transuranic wastes: An updated systems evaluation and applications assessment

Depth enhancement techniques for the in situ vitrification process

“…In these simulations, we compute the thermo-fluid response of the ISV system by solving a discretized form of coupled partial differential equations that describe the conservation of mass, momentum, energy, and electric charge. Temperature-dependent thermal, electrical, and transport properties included in the model were obtained from Buelt et al (1987). Multi-phase, multi-electrode systems are also explicitly modeled in these simulations.…”

Site Safety and Health Plan (Phase 3) for the treatability study for in situ vitrification at Seepage Pit 1 in Waste Area Grouping 7, Oak Ridge National Laboratory, Oak Ridge, TN

“…P u . No mechanisms during the ISV process can be postulated that would result in a lateral concentration of the Pu (Buelt et al 1987); therefore, a criticality incident is not considered possible.…”

“…L Buelt et al 1987, pp. 116-120); water, of course, must be boiled away but ISV power can be supplied in significant excess of hydraulic recharge to the melt zone.…”

“…The decrease in release factor on the 116-BAA test is at least partially attributable to the increased volume of melt and increased melt depth for processing the contamination. It has been shown (Buelt et al 1987) that contaminant retention increases as the depth of melt increases. Thus, it can be assumed that because the contamination lies in the lower regions of pit 1, a favorable retention of lnCs will be experienced.…”

“…Since previous test results and simulations (e.g., Buelt et al, 1987) are limited for U and Pu, this is the best and most recent data available for these estimates. The methodology employed by Campbell and Ikenbeny (1990) for evaluation of the release potential for the 116-BAA mi ISV test was used to determine the release and corresponding dose equivalents to personnel on the pit 1 test.…”