There must be a some sort of reaction component to this explosion because the gamma counter when wild for a few seconds. Gammas are produced by nuclear causes.
On Fri, Feb 6, 2015 at 4:13 PM, Bob Higgins <[email protected]> wrote: > Ryan confirmed that the tube used was of the original Dogbone design with > a 4mm ID and a 6.35mm (1/4") OD. This has a wall thickness of only 1.18mm > compared to Parkhomov's 2.5mm wall thickness. For the strength of the tube > used, the amount of LiAlH4 inserted was just too much. > > Fortunately they were all behind a safety shield. This should be a lesson > to all replicators. > > Bob Higgins > > > On Fri, Feb 6, 2015 at 2:02 PM, Blaze Spinnaker <[email protected]> > wrote: > >> Be careful not to get the integrity too strong, otherwise you could have >> a real pipe bomb on your hands.. >> >> On Fri, Feb 6, 2015 at 12:59 PM, Bob Higgins <[email protected]> >> wrote: >> >>> Ryan Hunt reports that the failure mode was NOT the compression fitting >>> giving way under pressure - the fitting remained intact. This experiment >>> was of the "easier Parkhomov" design, posted previously where the seal was >>> made with a compression fitting, in this case with the use of a soft >>> aluminum ferrule at the suggestion of Alan Goldwater. Alan's tests >>> suggested the compression fitting would hold and it did! Using the >>> compression fitting is a real win because it completely avoids the >>> problematic sealing of the ends with cement while providing an opportunity >>> to instrument the reaction vessel. >>> >>> When this failure occurred, it appeared to be a raw ceramic body >>> failure. This could easily have come from too much pressure coming from a >>> too large charge of LiAlH4 for the vacant volume inside the apparatus. >>> MFMP will extract that volume information and relate it to the weight of >>> LiAlH4 that was added, as being a benchmark for too much LiAlH4. The tube >>> used was 1/4" OD, but at the moment, I am not sure if it was a 4mm ID tube >>> or a 1/8" ID tube. The Parkhomov tube had an ID of half of its OD. >>> >>> Bob Higgins >>> >>> On Fri, Feb 6, 2015 at 11:39 AM, MarkI-ZeroPoint <[email protected]> >>> wrote: >>> >>>> At 2:29/2:30 into the short segment posted by Craig, it looks like the >>>> right-side end-plug, or whatever is sticking out that end, blows out. And >>>> I use that term specifically since one also sees some hint of a pressure >>>> release. Whether that release is at an appropriate level is apparently >>>> debatable... >>>> -mark iverson >>>> >>> >> >
