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Title: Tests of a system to exclude roots from buried radioactive waste in a warm, humid climate

Vegetation is commonly used to stabilize the ground covering buried waste sites. However, constituents of buried waste can be brought to the surface if the waste is penetrated by plant roots. An ideal waste burial system would allow the use of vegetation to stabilize the soil above the buried waste but would exclude roots from the waste. One system that shows considerable promise is a slow release encapsulation of a root growth inhibitor (Trifluralin). Projected lifetimes of the capsule are in the order of 100 years. The capsule is bonded to a geotextile, which provides an easy means of distributing the capsule evenly over the area to be protected. Vegetation grown in the soil above the barrier has provided good ground cover, although some decrease in growth has been found in some species. Of the species tested the sensitivity to the biobarrier, as measured by the distance root growth stops near the barrier, is bamboo> bahia grass> bermuda grass> soybean. Potential uses for the biobarrier at the Savannah River Site (SRS) include the protection of clay caps over buried, low-level saltstone and protection of gravel drains and clay caps over decommissioned seepage basins. Trails of the biobarrier as part ofmore » waste site caps are scheduled to begin during the next 12 months.« less
Authors:
;  [1] ;  [2] ; ;  [3]
  1. (Westinghouse Savannah River Co., Aiken, SC (United States))
  2. (Savannah River Ecology Lab., Aiken, SC (United States))
  3. (Lilly Research Laboratories, Greenfield, IN (United States))
Publication Date:
OSTI Identifier:
5380804
Report Number(s):
WSRC-RP-89-16; CONF-890854--16
ON: DE92011178
DOE Contract Number:
AC09-89SR18035; AC09-76SR00001
Resource Type:
Conference
Resource Relation:
Conference: 11. annual DOE low level waste management conference, Pittsburgh, PA (United States), 22-24 Aug 1989
Research Org:
Westinghouse Savannah River Co., Aiken, SC (United States)
Sponsoring Org:
DOE; USDOE, Washington, DC (United States)
Country of Publication:
United States
Language:
English
Subject:
12 MANAGEMENT OF RADIOACTIVE AND NON-RADIOACTIVE WASTES FROM NUCLEAR FACILITIES; PLANTS; ROOTS; UNDERGROUND STORAGE; GROUND COVER; CLIMATES; RADIOACTIVE WASTE DISPOSAL; RADIOACTIVE WASTE MANAGEMENT; SAVANNAH RIVER PLANT; MANAGEMENT; NATIONAL ORGANIZATIONS; STORAGE; US AEC; US DOE; US ERDA; US ORGANIZATIONS; WASTE DISPOSAL; WASTE MANAGEMENT 052002* -- Nuclear Fuels-- Waste Disposal & Storage