scholarly journals A CREST model for the RDX/TNT explosive Composition B

2020 ◽  
Author(s):  
Nicholas Whitworth ◽  
Caroline Handley
Keyword(s):  
Explosive Composition

RDX and the Army Air Forces

2018 ◽  
Author(s):  
Colin F. Baxter
Keyword(s):  
Air Force ◽  
Production Capacity ◽  
Explosive Composition

The Air Force requested the explosive Composition B filling for all of its bombs. The production capacity of RDX and Comp B was insufficient to meet this demand. The controversy over the Comp B2 bomb, which did not have the 1 percent wax additive found in the regular Comp B bomb. The suspicion surrounding the Comp B2 bomb, and the mishandling of bombs generally, led to the issue of air crews jettisoning their bombs. The Metfield incident seriously compromised the use of Comp B2 bombs.

Particle Size Characteristics of Molten Corium Quenched in Water

2008 ◽  
Author(s):  
B. T. Min ◽  
H. D. Kim ◽  
J. H. Kim ◽  
S. W. Hong ◽  
I. K. Park
Keyword(s):  
Particle Size ◽  
Size Distribution ◽  
Steam Explosion ◽  
Eutectic Composition ◽  
Nuclear Reactor ◽  
Cold Water ◽  
Severe Accident ◽  
Test Facility ◽  
Water Steam ◽  
Explosive Composition

During a hypothetical severe accident in a nuclear reactor, a steam explosion might occur when molten corium interacts with water. The strength of a steam explosion affects the integrity of the containment of a nuclear reactor and is highly dependant on the characteristics of the melt-water-steam mixture. Since a break-up and fragmentation process during a pre-mixing are important mechanisms for a steam explosion behavior and affect the debris size distribution, the particle size characteristics of quenched corium have been investigated. For several years, series of experiments have been performed using prototypical corium in the TROI test facility with a high frequency induction heating using cold crucible technology. The molten corium was discharged into the cold water and the quenched debris particles were collected, sieved and examined for the effect of a size distribution on a steam explosion. The small corium droplets do not seem to contribute to a steam explosion owing to solidification at an early stage before the explosion but the large droplets contribute to it owing to their liquid state. It was also shown that single oxides and binary oxides with an eutectic composition (UO2/ZrO2 = 70/30 at weight percentage) led to steam explosions, but a binary oxide with a non-eutectic one did not. The mass mean diameters of the debris of the steam explosive composition was less than that of the non-steam explosive composition. Zirconia was the most energetic steam-explosive material in these tests, and an eutectic composition of corium also lead to a steam explosion, but a non-eutectic composition corium hardly led to a steam explosion. The particle sizes of the molten corium participating in a steam explosion were shown to be mainly 3–6 mm depending on the material and composition.

Further studies of the role of radiative ignition in the propagation of large explosions

1987 ◽  
Vol 409 (1836) ◽  
pp. 1-20 ◽  
Keyword(s):  
Combustion Products ◽  
Theoretical Modelling ◽  
Combustion Properties ◽  
Radiation Induced ◽  
Path Lengths ◽  
Basic Hypothesis ◽  
Definition Of ◽  
Explosive Composition ◽  
Radiance Distribution ◽  
Gas Volume

Following previous work demonstrating that the anomalously high rates of propagation of unconfined vapour cloud explosions could be caused, or aggravated, by radiation-induced multi-point ignition due to small fibrous particles ahead of the main flame front, the investigation is extended towards more practical criteria. Ignition lag measurements are carried out in various hydrocarbons, at different relative velocities between particle and mixture, in a radiation flux that is varied in magnitude, direction and range of wavelengths. An image furnace with a tungsten filament as source is used as an alternative to a CO 2 laser, to obtain a closer approximation to radiation from combustion products. Measurements on particles of clean insulating and cotton wool are complemented by more ‘practical’ dusts collected from, for example, vacuum cleaners and shelves. The spectral absorption of various particles is compared with the radiance distribution due to various path lengths of combustion products, and the effect of coating clean particles with lamp black (to simulate the effect of dirt) is assessed. The basic hypothesis is reassessed in terms of a more detailed theoretical model that allows for slip between particle and gas velocity, radiation from secondary ignition centres and a definition of flame speed based on the rate of product gas volume generation. It is found that the susceptibility of various hydrocarbons and mixtures to this type of ignition accords with other combustion properties such as ignition temperatures and burning velocities. While the absorp­tive properties of certain particles and the propensity of others to emit inert blanketing vapour renders them less effective in producing ignition in the laboratory, all particles become hazardous when blackened by dirt and particularly, when subjected to previous exposure to radiation while not surrounded by a mixture of explosive composition. Theoretical modelling confirms that flame speeds of the order required to account for the damage observed in practice are generated by this mechanism and that this result applies for surprisingly low concentrations of hazardous particles. Thus, given the facility with which agglomerates of fibres are raised in suspension and the likelihood of their presence in numbers sufficient for this mechanism, the hazard warning implied by the previous work is reinforced.

scholarly journals Integrated rheology model: Explosive Composition B-3

2018 ◽  
Vol 36 (4) ◽  
pp. 398-411 ◽  
Author(s):  
Stephen M. Davis ◽  
David K. Zerkle ◽  
Laura B Smilowitz ◽  
Brian F. Henson ◽  
Natalya A. Suvorova ◽  
...  
Keyword(s):  
Explosive Composition ◽  
Rheology Model

Characterization and modeling of the anisotropic damage of a high-explosive composition

2014 ◽  
Vol 131 ◽  
pp. 525-537 ◽  
Author(s):  
D. Picart ◽  
A. Benelfellah ◽  
J.L. Brigolle ◽  
A. Frachon ◽  
M. Gratton ◽  
...  
Keyword(s):  
High Explosive ◽  
Anisotropic Damage ◽  
Explosive Composition

Physiological and transcriptional responses of Baccharis halimifolia to the explosive “composition B” (RDX/TNT) in amended soil

2014 ◽  
Vol 21 (13) ◽  
pp. 8261-8270 ◽  
Author(s):  
Asjad Ali ◽  
Julie C. Zinnert ◽  
Balasubramaniam Muthukumar ◽  
Yanhui Peng ◽  
Sang-Min Chung ◽  
...  
Keyword(s):  
Transcriptional Responses ◽  
Baccharis Halimifolia ◽  
Explosive Composition ◽  
Amended Soil
Sign in / Sign up

Export Citation Format

Share Document