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Title: Near-field interactions

Abstract

To approach the subject of high level nuclear waste disposal in deep ocean sediments it is convenient to differentiate between processes occurring in a near field environment, that region arbitrarily defined as lying between the canister surface and the maximum extent of the 100/sup 0/C isotherm, and those which occur at lower temperatures and beyond the influence of intense radiation. A variety of considerations related to the chemistry of seawater-sediment mixtures suggests that about 200/sup 0/C is the maximum temperature advisable in the near field environment. Results of a coupled fluid flow - thermal transport computer model show the maximum convection rate adjacent to a canister having surface temperature of 200/sup 0/C is 0.3 m/100 years, and that this velocity is halved with the passage of each thermal half life of the assumed waste form (30 years). Based on this convective model, it follows that compounds formed in the near field environment during the first thousand years following emplacement would be restricted to a region lying within two meters of the canister surface.

Authors:
;
Publication Date:
Research Org.:
Sandia National Labs., Albuquerque, NM (USA)
OSTI Identifier:
5375850
Report Number(s):
SAND-79-0406C
ON: DE82011303; TRN: 82-011518
DOE Contract Number:  
AC04-76DP00789
Resource Type:
Technical Report
Country of Publication:
United States
Language:
English
Subject:
12 MANAGEMENT OF RADIOACTIVE AND NON-RADIOACTIVE WASTES FROM NUCLEAR FACILITIES; 54 ENVIRONMENTAL SCIENCES; HIGH-LEVEL RADIOACTIVE WASTES; HEAT TRANSFER; MARINE DISPOSAL; WASTE-ROCK INTERACTIONS; RADIOACTIVE WASTE DISPOSAL; SEDIMENTS; CHEMICAL REACTIONS; CONTAINERS; ENVIRONMENTAL IMPACTS; FLOW MODELS; HIGH TEMPERATURE; ISOTHERM; MATHEMATICAL MODELS; SEA BED; SEAWATER; SEDIMENT-WATER INTERFACES; ENERGY TRANSFER; HYDROGEN COMPOUNDS; INTERFACES; MANAGEMENT; MATERIALS; OXYGEN COMPOUNDS; RADIOACTIVE MATERIALS; RADIOACTIVE WASTES; WASTE DISPOSAL; WASTE MANAGEMENT; WASTES; WATER; 052002* - Nuclear Fuels- Waste Disposal & Storage; 520500 - Environment, Aquatic- Site Resource & Use Studies- (-1989)

Citation Formats

Krumhansl, J.L., and McVey, D.F. Near-field interactions. United States: N. p., 1979. Web. doi:10.2172/5375850.
Krumhansl, J.L., & McVey, D.F. Near-field interactions. United States. doi:10.2172/5375850.
Krumhansl, J.L., and McVey, D.F. Thu . "Near-field interactions". United States. doi:10.2172/5375850. https://www.osti.gov/servlets/purl/5375850.
@article{osti_5375850,
title = {Near-field interactions},
author = {Krumhansl, J.L. and McVey, D.F.},
abstractNote = {To approach the subject of high level nuclear waste disposal in deep ocean sediments it is convenient to differentiate between processes occurring in a near field environment, that region arbitrarily defined as lying between the canister surface and the maximum extent of the 100/sup 0/C isotherm, and those which occur at lower temperatures and beyond the influence of intense radiation. A variety of considerations related to the chemistry of seawater-sediment mixtures suggests that about 200/sup 0/C is the maximum temperature advisable in the near field environment. Results of a coupled fluid flow - thermal transport computer model show the maximum convection rate adjacent to a canister having surface temperature of 200/sup 0/C is 0.3 m/100 years, and that this velocity is halved with the passage of each thermal half life of the assumed waste form (30 years). Based on this convective model, it follows that compounds formed in the near field environment during the first thousand years following emplacement would be restricted to a region lying within two meters of the canister surface.},
doi = {10.2172/5375850},
journal = {},
number = ,
volume = ,
place = {United States},
year = {1979},
month = {2}
}