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Title: Soil characterization methods for unsaturated low-level waste sites

To support a license application for the disposal of low-level radioactive waste (LLW), applicants must characterize the unsaturated zone and demonstrate that waste will not migrate from the facility boundary. This document provides a strategy for developing this characterization plan. It describes principles of contaminant flow and transport, site characterization and monitoring strategies, and data management. It also discusses methods and practices that are currently used to monitor properties and conditions in the soil profile, how these properties influence water and waste migration, and why they are important to the license application. The methods part of the document is divided into sections on laboratory and field-based properties, then further subdivided into the description of methods for determining 18 physical, flow, and transport properties. Because of the availability of detailed procedures in many texts and journal articles, the reader is often directed for details to the available literature. References are made to experiments performed at the Las Cruces Trench site, New Mexico, that support LLW site characterization activities. A major contribution from the Las Cruces study is the experience gained in handling data sets for site characterization and the subsequent use of these data sets in modeling studies.
Authors:
;  [1] ; ;  [2] ;  [3] ; ;  [4]
  1. (Arizona Univ., Tucson, AZ (United States). Dept. of Soil and Water Science)
  2. (Pacific Northwest Lab., Richland, WA (United States))
  3. (New Mexico State Univ., Las Cruces, NM (United States). Dept. of Mechanical Engineering)
  4. (Nuclear Regulatory Commission, Washington, DC (United States))
Publication Date:
OSTI Identifier:
6677674
Report Number(s):
NUREG/CR-5988; PNL--8480
ON: TI93008562
DOE Contract Number:
AC06-76RL01830
Resource Type:
Technical Report
Research Org:
Nuclear Regulatory Commission, Washington, DC (United States). Div. of Engineering; Pacific Northwest Lab., Richland, WA (United States)
Sponsoring Org:
NRC; Nuclear Regulatory Commission, Washington, DC (United States)
Country of Publication:
United States
Language:
English
Subject:
12 MANAGEMENT OF RADIOACTIVE AND NON-RADIOACTIVE WASTES FROM NUCLEAR FACILITIES; 54 ENVIRONMENTAL SCIENCES; LOW-LEVEL RADIOACTIVE WASTES; RADIOACTIVE WASTE DISPOSAL; RADIONUCLIDE MIGRATION; RADIOACTIVE WASTE FACILITIES; LICENSING; FLUID FLOW; HYDROLOGY; RADIATION MONITORING; RADIATION TRANSPORT; SITE CHARACTERIZATION; SOILS; ENVIRONMENTAL TRANSPORT; MANAGEMENT; MASS TRANSFER; MATERIALS; MONITORING; NUCLEAR FACILITIES; RADIOACTIVE MATERIALS; RADIOACTIVE WASTE MANAGEMENT; RADIOACTIVE WASTES; WASTE DISPOSAL; WASTE MANAGEMENT; WASTES 052002* -- Nuclear Fuels-- Waste Disposal & Storage; 540230 -- Environment, Terrestrial-- Radioactive Materials Monitoring & Transport-- (1990-)