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Download Encyclopedia of Explosives and Related Items (Vol 09) by U.S. Army Research and Development Command.; TACOM, ARDEC.; PDF

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By U.S. Army Research and Development Command.; TACOM, ARDEC.; Warheads, Energetics and Combat Support Center

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Table 9 showsthe impact results.

6 Urizar data and the state-of-the-artregardingthe ignition of expls by irradiation. Berberet rdso madecalcns(Ref 123) on the atomic displacements by heavy particles, including neutrons, in high expls composedof light elements. Problems associatedwith the reactor irradiation of a 60–80 gram expl samplewere also included An extensive study on the effects of nuclear reactor irradiations on selectedexpls and proplnts wasundertaken asa joint Aerojet-General/General Electric/PicArsn effort (Refs 154, 155, 159, 165, 176 & 192) for NASA aspart of the NERVA (Nuclear Engine for Rocket Vehicle Applications) program.

The max rate of final decay normally occurred at about 40% decompn,but this shifted to about zero time upon irradiation. 2 * 0. 4kcal/RT) Jach suggestedthat the decreasein activation energyis associatedwith a changein electronic excitation energies,while the decreasein frequency factor arosefrom grossstructural changes accompanyingthe reactor irradiation Sincethe effect of nuclear radiation on expls hasbeen a subject of considerableinterest from both the researchand engineeringpoints of view, 100 1 1 it was not surprising that the trends developed for more detailed analyseswith higher total neutron fluxes and rates as shown in the work of Urizar, Loughran and Smith (Ref 98) and later witi-the results reported by Avrami and Voreck (Ref 192) In one of the more extensive programs,Urizar et al (Ref 98) exposed a number of secondary expl compds and mixts to two fluence levels (101sn/cm2 with 5 x 106R and 3 x 1016n/cm2 with 2 x 10sR) in the Ground Test Reactor at Convair, Fort Worth, Texas.

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