Hanford waste vitrification systems risk assessment

Abstract

This reportwas preparedas an accountof worksponsored by anagencyof the United States Government.Neitherthe UnitedStates Government nor anyagencythereof, norany of their employees, nor anyof theircontractors, subcontractors or their employees,makesany warranty, expressor implied, or assumesany legalliabilityor responsibility for the accuracy,completeness, or any third party'suse or the results of suchuse of any inlormation, apparatus,product,or process disclosed,or representsthat its usewouldnotinfringe privatelyownedrights. Reference'. herein toany specific commercialproduct,process,or serviceby tradename, trademark,manufacturer, or otherwise,doesnotnecessarily constituteor implyitsendo:sement,recommendation, or favo;ingbythe UnitedStates Government or any agency thereol or its contractors or subcontractors. Theviews and opinionsof authorsexpressedhereindo notnecessarilystate or reflect thoseof the UnitedStatesGovernment or any agencythereof. Thisreporthas beenreproducedfromthe bestavailablecopy. ,I Availablein papercopyandmicrofiche.

Hanford Waste Vitrification Plant Project Waste Form Qualification Program Plan

“…During fiscal year (FY) 1991, a risk assessment study (Miller et al 1991) was performed to better determine the risks associated with the Hanford Site DST vitrification baseline plans (DOE 1988a). The results of the risk assessment study resulted in another study that examined the overall tank waste disposal alternatives for the Hanford Site and proposed a reference course of action (Grygiel et al 1991).…”

Preliminary assessment of blending Hanford tank wastes

“…The 1 wt% P205 waste limit (4 wt% in the feed) will restrict overall loading of the blended wastes to much below 25 wt%. Previous review in the Hanford Waste Vitrification Risk Assessment -Final Report (Miller et al 1991) indicates that there is low to moderate risk in assuming that the P205 limit can be raised to 2.5 wt% (10 wt% in the feed). Even small amounts of P2Os(<0.5 wt% feed) are apparently immiscible in silicate melts on the molecular scale, lt is the coalescence of the immiscible phases into droplets that can create potential problems.…”