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in creator/contributor: "Powell, W. J."

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G3 model of gas and liquid migration from grout containing radioactive waste

Grout has been evaluated as a means of containing low-level radioactive waste for long-term disposal. Concerns about hydrogen and reactive gas generation in the Hanford Site grout disposal facility lead to the development of the G3 model, which has predicted buildup of radiolytically formed gases in the grout region and their migration to air-filled regions. The G3 model is a one-dimensional code that couples models of gas diffusion with two-phase gas and liquid flow. It was coupled to a compar… more

Date: November 1, 1994

Creator: Roblyer, S. P.; Finfrock, S. H. & Powell, W. J.

Item Type: Article

Partner: UNT Libraries Government Documents Department

open access

Acute toxicity screening of Hanford Site waste grouts using aquatic invertebrates

Waste grouts prepared by mixing a simulated nonradioactive liquid waste with a dry solids blend consisting of cement, fly ash, and clay were screened for their acute toxicity using aquatic invertebrates (D. magna, D. pulex, and C. dubia) as test organisms and a fluorogenic substrate (4-methylumbelliferyl b-d galactoside) as the toxic stress indicator. After one hour of exposing juvenile daphnids to grout extracts of varying concentrations, followed by a 15-minute reaction with the fluorogenic s… more

Date: November 1, 1993

Creator: Rebagay, T. V.; Dodd, D. A.; Lockrem, L. L.; Powell, W. J. & Voogd, J. A.