{{Short description|Shock tube detonator}} thumb|Nonel shock tubes (pink, red, orange, yellow) with Orica surface delay connector (blue) in use. {{Use dmy dates|date=August 2022}} '''Nonel''' is a shock tube detonator designed to initiate explosions, generally for the purpose of demolition of buildings and for use in the blasting of rock in mines and quarries. Nonel is a contraction of "non electric".<ref>[http://acronyms.thefreedictionary.com/Non-Electric+(firing+system+for+explosives) Non-Electric (firing system for explosives)] The Free Dictionary. Retrieved 13 February 2023</ref> Instead of electric wires, a hollow plastic tube delivers the firing impulse to the detonator, making it immune to most of the hazards associated with stray electric current.
It consists of a small diameter, three-layer plastic tube coated on the innermost wall with a reactive explosive compound, which, when ignited, propagates a low energy signal, similar to a dust explosion. The reaction travels at approximately 2,000 m/s (6,500 ft/s) along the length of the tubing with minimal disturbance outside of the tube.
Nonel was invented by the Swedish company Nitro Nobel in the 1960s and 1970s,<ref>{{cite web |url=http://www.dynonobel.com/ |title=Home |website=dynonobel.com}}</ref> under the leadership of Per-Anders Persson,<ref name="NYT 1990">{{Cite news|url=https://www.nytimes.com/1990/03/05/us/chronicle-102090.html|title=Chronicle|first=Susan Heller|last=Anderson|work=The New York Times |date=March 5, 1990|via=NYTimes.com}}</ref> and launched to the demolitions market in 1973.<ref>{{Cite web|url=http://www.ausimm.com/presentations/podoliak.pdf |title=Archived copy |access-date=2006-12-28 |archive-url=https://web.archive.org/web/20060821175343/http://www.ausimm.com/presentations/podoliak.pdf |archive-date=2006-08-21 |url-status=dead }}</ref> (Nitro Nobel became a part of Dyno Nobel after being sold to Norwegian Dyno Industrier AS in 1986.)
==References== {{Reflist}} * {{cite web | last = Kathryn | first = Podoliak | title = The Evolution of the Detonator | date = 2004-04-21 | url = http://www.ausimm.com/presentations/podoliak.pdf | access-date = 2006-12-28 |archiveurl = https://web.archive.org/web/20060821175343/http://www.ausimm.com/presentations/podoliak.pdf <!-- Bot retrieved archive --> |archive-date = 2006-08-21}}
==Further reading== * [https://web.archive.org/web/20090304134345/http://web.mst.edu/~explosiv/class_video_library.htm Explosive videos] * [https://doi.org/10.1007%2FBF02425044 An experimental study of temperature structure of shock relaxation in air-dusty explosive media]
{{DEFAULTSORT:Nonel}} Category:Demolition Category:Detonators Category:Explosives Category:Mining equipment Category:Swedish inventions