To: Terry Maloney who wrote (425785 ) 3/4/2014 2:39:37 AM From: Broken_Clock Read Replies (2) | Respond to of 436258 WIPP fun zoneenenews.com NPR , Feb. 28, 2014 (emphasis added ): CAPTION: A piece of salt is believed to have fallen from a cavern ceiling and crushed drums of waste [...] the most likely scenario is that a huge chunk of salt fell from the ceiling and ruptured a drum or multiple drums of waste. 13 contaminated workers. Fukushima here in the good old Homeland. technical, but unfortunately prescient.cardnm.org "The fallacy of that conclusion stems from a misconception of the behavior of the Salado Formation. The 13-ft. high by 33-ft. wide rooms will be short-lived. Large open fractures appear in the ceilings of all rooms within months of mining. Several roof-falls and floor heaves have already occurred at WIPP, so an extensive array of roof bolts has been installed to delay the failure of the remaining rooms long enough to fill them with drums. These and all future rooms will suffer collapse of major roof slabs bounded above by weak clay-bed partings. Such falls will crush the drums, and uncontained waste will enter the fractures. DOE has assumed roof fractures extending upwards only to Marker Bed #138, forty feet above the rooms, but as creep subsidence incorporates whole panels and then the repository width, horizontal slip and openings will occur on successively higher clay seams, most of them bounding stiff anhydrites. Inclined fractures will interconnect the rooms and panels with fractured anhydrite beds farther above the repository, each of which will contribute to increasing inflows of brine. Experience at potash mines in similar salt sequences (notably at K-2 Mine in Saskatchewan) indicates that such roof behavior is typical. At the Canadian mines, the fractures sometimes breach the top of salt into an aquifer, causing inflows that flood the mine (Tofani, R., 1983, Van Sambeek, 1993). After shaft leakage, such roof breaching is the next most common cause of flooding of salt and potash mines, all of which ultimately flood because they lie below the water table. Already there is leakage occurring from the Dewey Lake Redbeds into one of the WIPP shafts, and thence into the repository. In European potash mining experience, such leakage has been irreparable. The first drop of water signals the eventual flooding of the mine."