Strontium leachability of hydrofracture grouts for sludge-slurries

Abstract

This paper summarizes a series of experiments to determine the strontium leachability of cement-based sludge-slurry hydrofracture grouts. The hydrofracture process has been used at ORNL since 1966 for the routine disposal of intermediate-level waste (ILW) solutions. In this

Laboratory stabilizations/solidification of tank sludges: MVST/BVEST

“…Cementfly ash has traditionally been the stabilizer of choice for 90 Sr, although cement alone also stabilizes 90 Sr quite well. (Laguna, 1970;McDaniel et al, 1982;Moore et al, 1975;Moore, 1976;Atkinson et al, 1986) Some contaminants are not stabilized by the high-pH environment of cementitious wasteforms, specifically, chromates and mercury in the case of the sludges discussed here. Ground, granulated blast-furnace slag (slag) effectively reduces chromates to the more insoluble cationic chromium and stabilizes ionic mercury.…”

State of the Art Report on High-Level Waste Tank Closure

“…Since strontium behaves similarly to calcium, cement-pozzolans will also tend to tie up Sr-90 better than cement alone. Cement-fly ash has traditionally been the stabilizer of choice for Sr-90, although cement alone can stabilize Sr to some extent (Laguna 1970;McDaniel et al 1982;Moore et al 1975;Moore 1976;Atkinson et al 1986). …”

Composite analysis for solid waste storage area 6

“…The brief description of hydrofracture disposal presented herein is based on reports by Weeren et al (1982), Myrick and Stow (1987), McDaniel et al (1982). than 12,000 m3 (3.1 million gallons) liquid of waste were disposed of by using this process.…”