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There are 33 known geologic faults at or in the near vicinity of the Yucca Mountain site. In the past 20 years, there have been over 600 recorded seismic events of Magnitude 2.5 or greater within 50 miles of the site, the largest of which was a Magnitude 5.6 earthquake in 1992, known as the Little Skull Mountain earthquake. It was centered about 8 miles from the site, causing damage to DOE's Yucca Mountain project office at the Nevada Test Site (NTS).
The hydrologic picture at Yucca Mountain is complex and not well understood. The hydrology of Yucca Mountain consists of a thick, dry or unsaturated zone and a saturated zone, i.e., the water table below. The site was initially selected because, in part, the actual repository location would be in the dry, unsaturated zone, well above the water table. This was thought to be an advantage over other sites as they were all located beneath the water table. [Now] DOE has determined that water moves rapidly through the dry, unsaturated zone by the discovery of an isotope of chlorine [36] at the repository horizon [800 feet below the surface] that is a residue from the above ground weapons testing program carried out in the Pacific Ocean in the 1950s. DOE had previously estimated that it would take many thousands of years for water to reach the repository horizon from the ground surface.
Water is now recognized to move very rapidly in the saturated zone and is capable of reaching the accessible environment in less than 500 years.
On July 9, 2004, the U.S. Court of Appeals for the D.C. Circuit ruled on challenges regarding radiation standards and design flaws in the site. While several of the challenges were ultimately dismissed, the Court did vacate a rule set by the EPA regarding radiation standards. The Court held in its ruling that EPA established a 10,000 year groundwater radiation standard for the Yucca Mountain Project that failed to match the findings of the National Academy of Sciences (NAS), as is required by law. NAS scientists found that peak doses of radiation would not occur until 300,000 years after the repository opened, and that the waste would remain a danger to humans and the environment for even a greater span of time.
Approximately 20 percent of our nation’s energy comes from nuclear power plants. There are over 100 nuclear reactors, already having produced nearly 80,000 tons of waste, yet not one adequate solution as to what we will do with this waste yet exists. The most toxic part of the waste from nuclear plants, plutonium, will remain a threat to the environment for almost 250,000 years and should be isolated to keep it out of our air and water. Despite this knowledge, there is a push to open up Yucca Mountain as a permanent storage facility, even though it cannot be demonstrated that waste stored there will be protected for even 10,000 years.
Originally posted by poonchang
[url=http://www.ieer.org/fctsheet/yuccaalt.html]If not Yucca Mountain,
In the short term, irradiated reactor fuel should be stored as safely as possible on site or as close to the point of generation as possible for an interim period (several decades) [...]
For the long-term, more basic research on various geologic settings is needed
other source
Water is now recognized to move very rapidly in the saturated zone and is capable of reaching the accessible environment in less than 500 years.
Originally posted by Chakotay
The answer to the problem is dilution, vitrification and return-to-origin.
Hold it till the hottest stuff half-lifes,
vitrify the material with the tailings, and put it back into the mines it came from.
Shundahai