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#11
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making laminated glass tubes
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#12
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making laminated glass tubes
On Mar 31, 7:17*pm, Fred Kasner wrote:
... The wooden walls were very thick. The apparatus had lasted for decades and to my knowledge never caused a problem. But it showed beautifully the disappearance and reappearance of the meniscus. Impressive display! And safe. Presumably safe. We're talking in excess of 850 psi here. The designers of the device may have tested it, or maybe not, or calculated the strength of the enclosure, or not. Possibly it's only decades of good luck. Who can predict what will happen in the long term? Years ago, there was an incident at a lab where I worked. Plutonium 239 had been sealed in glass vials, apparently for safety reasons. A couple of decades later, the vials were retrieved from storage, and the first one touched exploded in the face of the man handling it. Alpha radiation had generated an unknown pressure of helium within the vial to a point apparently just short of the breaking strength of the glass. The area had to be enclosed and monitored before the rest of the vials could be moved and 'disarmed'. DB |
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