Partial detonation

On occasion a partial detonation may take place, resulting in large visible quantities of explosive being left at the scene in this event collection and subsequent identification of samples is relatively straightforward. However most explosions only leave invisible residues of unconsumed explosive at the scene. The first problem then is to find the right place from which to take samples. Of course, it wiU be necessary to have a stock of sampling and packaging materials available, which have been quality assured to ensure they are free from any possible traces of explosive so that the validity of any subsequent tests can be established. 

Friction Test, steel shoe Detonates Partially deton... 

Sensitivity and Hazards ofLP. Some mono-proplnts and some well-mixed biproplnts exhibit detonation characteristics typical of Liquid Explosives (See Sects 4 5 of article on Liquid Explosives in this Vol). However, biproplnts usually do not sustain complete detonation, ie, a rather small portion of the biproplnt undergoes something akin to detonation and the remainder deflagrates (Ref 26). Of course even this partial detonation can be very dangerous and destructive. LP are also subject to another phenomenon which is potentially destructive (at least to the rocket), namely combustion instability (Refs 16 22)... 

Rifle Bullet Impact Test - Similar to TNT, but less sensitive than RDX (Ref 7a) in 100 trials there were 60 partial detons,... 

Impact Sensitivity by Brucetofl No 3 Apparatus, 50% positive in brass cups with 5kg weight at 90cm drop, vs 50cm for RDX Power by Ballistic. Mortar Test, 127% TNT Power by Trauzl Lead Block Test, 129% TNT Rate of Detonation. See Detonation Velocity Rifle Bullet Test. In 7 trials conducted in Canada with charges placed in steel pipe nipples — 5 passed, 1 detonated and 1 partially detonated... 

The extent of detonation of an explosive, that is, partial detonation or complete detonation is concluded on the basis of mechanical effects hole cutting in a steel plate, dent depth in a witness steel block or compression of a copper cylinder, produced as a result of detonation of explosive under test. There are several variants of the gap test which have been the subject of investigation by several researchers described in the literature [74—77]. 

Impact Sensitivity — does not detonate Initiation — only partial detonation with No 6 cap... 

Specific Gas Energy. Gmelins Handbuch (Ref 56) gives 5575 kg/1 for complete deton and 3840 kg/1 for partial deton... 

Results are shown in Fig 5. The exptl deflagration data are for H2/02 deflagrations (Ref 3a). Fishburn suggests that the exptl large-scale deflagration may in fact be a partial detonation For the above conditions, Fishburn s computed static impulses for detonation and deflagration are shown in Fig 6. Note that impulses are essentially identical for R/Rc> 2... 

The largest catastrophe in the history of the chemical industry took place in September, 1921, at Oppau, where a partial detonation of about 4000 tons of a double salt, composed of more or less equal amounts of ammonium nitrate and ammonium sulphate occurred. The cause of this explosion has never been fully explained. Most likely it was brought about by attempts to break up the agglomerated double salt by means of an explosive. Approximately 1000 men were killed in the Oppau explosion. 

Sensitivity to detonation—ncA detond by spit of BkPdr fuze, 0.4 MF in a No 6 blasting cap caused only partial deton... 

PD partial detonation(Brit) a binding or coating agent, in... 

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