Greater Confinement Disposal Test at the Nevada Test Site. [At 30 Meters]. PDF Download
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Author: Publisher: ISBN: Category : Languages : en Pages :
Book Description
The Greater Confinement disposal Test (GCDT) at the Nevada Test Site will be a full scale demonstration of intermediate depth burial for disposal of defense low-level radioactive wastes considered unsuitable for shallow land burial. The GCDT project will demonstrate that these wastes can be efficaciously disposed at a depth of approximately 30 meters where the probability of future inadvertent human intrusion and of potential waste migration are negligible. The GCDT will be instrumented to collect data on properties of the disposal madium (alluvial sediments). Tracers will be injected to assess the transport potential of wastes through the medium. Tracer data will be analyzed to determine the effectiveness of the disposal method.
Author: Publisher: ISBN: Category : Languages : en Pages :
Book Description
The Greater Confinement disposal Test (GCDT) at the Nevada Test Site will be a full scale demonstration of intermediate depth burial for disposal of defense low-level radioactive wastes considered unsuitable for shallow land burial. The GCDT project will demonstrate that these wastes can be efficaciously disposed at a depth of approximately 30 meters where the probability of future inadvertent human intrusion and of potential waste migration are negligible. The GCDT will be instrumented to collect data on properties of the disposal madium (alluvial sediments). Tracers will be injected to assess the transport potential of wastes through the medium. Tracer data will be analyzed to determine the effectiveness of the disposal method.
Author: Publisher: ISBN: Category : Languages : en Pages :
Book Description
At the NTS, we consider Greater Confinement Disposal (GCD) to be a good waste management practice rather than a disposal technology. This is an important distinction because it redefines the nature of GCD. All disposal facilities operate under the principal of ''as low as reasonably achievable'' (ALARA) in reducing personnel and public exposures. ALARA is not a technology or method but a principal put into practice. We view GCD in the same manner.
Author: Publisher: ISBN: Category : Languages : en Pages :
Book Description
A 1.1 MegaCuri and 3.5 kilowatt waste source has been buried 30 meters down an auger hole in a tuffaceous alluvium for over three years. Temperature and moisture have been monitored in the surrounding soil during this time and two gaseous tracer migration studies conducted to determine flow parameters. Temperatures exceeding 300°C have been recorded and the moisture range has increased from 10 to 12% to 2 to 14%. The tracer migration data is being analyzed. A two-dimensional transient multi-phase and E.P.A. accepted model, WAFE, is being used to simulate this data and make long term performance projections. Many problems associated with precession, array boundaries and local subroutines have been encountered in converting the model which was developed on the Los Alamos National Laboratory's CRAY based computer system to run on a DEC/VAX 750. Documentation, which is still in rough draft, has also made the valid modification of the code or organization of an input data file difficult. 10 figs.
Author: Publisher: ISBN: Category : Languages : en Pages :
Book Description
This paper discusses the design and development of a remotely controlled waste handling system (RWHS) for use in radioactive waste disposal operations. A RWHS was developed at the US Department of Energy's (DOE) Nevada Test Site for use in the Greater Confinement Disposal Test (GCDT). The RWHS consists of a remote control console and the following remotely operated features: a crane, a grapple/manipulator module which is suspended by the crane hoist hook, and closed-circuit television cameras. The RWHS was used to safely place high-specific-activity radioactive waste in greater confinement disposal. Between December 15, 1983, and February 23, 1984, five encapsulated sources were open-air transferred from shielded shipping casks and placed 30 m down a 3-m-dia augered shaft using the RWHS. These sources contained approximately 460 kCi of 9°Sr, 21 kCi of 137Cs, and 390 Ci of 6°Co. Each source was transferred safely and efficiently and operational personnel did not receive any recordable doses. 3 references, 5 figures.
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