Blast Chamber

D - Fixed arcing contact - Tubular gas (blast) chamber Puffer piston... 

Figure 4.3 Rubber lined shot blasting chamber-shot blasted pipe fittings ready for adhesive coating.

The quantity of CO, C02, NO and N02 is measured simultaneously and continuously over a period 20 min. The concentration of CO and C02 are constant over the entire measuring period, provided the blast chamber is sufficiently gas tight. Since NO and N02 give subsequent secondary reactions, measured concentration is extrapolated to obtain the initial concentration. From the initial concentrations so determined, the volume of the chamber and the amount of the explosive fired, the amount of each toxic gas is calculated in litres per kilogram of explosive (at standard temperature and pressure.) The test is performed three times. 

Blades, T.A., R. DiBerardo, G. Misko, and N. McFarlane. 2004. Demon-stration/Validation of the TC-25 Donovan Blast Chamber Porton Down,... 

Blades, T.A., R. DiBerardo, G. Misko, and N. McFarlane. 2004. Demon-stration/Validation of the TC-25 Donovan Blast Chamber Porton Down, U.K., Final Demonstration Test Report, April-September 2003, ECBC-TR-362, May. Aberdeen Proving Ground, Md. Edgewood Chemical and Biological Center, Chemical Biological Applications and Risk Reduction Business Unit. 

DBC Donovan blast chamber IMPA isopropyl methylphosphonic acid... 

Donovan blast chamber (DBC) (in testing for use with CWM) Mobile system potentially usable for the destruction of explosively configured munitions without neutralization of their chemical contents... 

The Donovan blast chamber (DBC) was developed and is manufactured by DeMil International, Inc., of Huntsville, Alabama (DeMil International, 2001). The DBC was originally developed to replace conventional open detonation operations in a contained environment that prevents the release of blast fragments, heavy metals, and energetic byproducts. It was later proposed that the DBC could be used to destroy CWM by detonation in its enclosed environment. 

The DBC consists of three main components the blast chamber, an expansion chamber, and an emissions control unit, the latter consisting of a particle filter and a bank of activated carbon filters. The maximum explosive rating of the currendy available T-10 mobile unit is 12 pounds of TNT... 

Two developmental systems could also be used. First, the SCANS system for on-site disposal of individual CAIS vials or bottles is under development specifically for this category. The benefit of SCANS is that it is designed to be an efficient treatment system that can be used if an RRS or EDS is not available for relocation to the site of the CAIS find and if transportation in an MRC is not allowed by the receiving state. SCANS may be a worthwhile alternative disposal option that can save the expense and time of transporting an RRS or EDS to the site. Second, if the development and permitting of the Donovan blast chamber (DBC) are completed, this system could be used for the disposal of loose CAIS, with the DBC transported to the CAIS or the CAIS... 

DeMil International. 2001. Donovan Blast Chamber. Available at . 

Stone Webster. 2001a. Evaluation of Donovan Blast Chamber for Destmction of Chemical Warfare Materiel, T-130. Prepared by Stone Webster, Inc., for Program Manager for Chemical Demilitarization. Febmary 15. Aberdeen Proving Ground, Md. Program Manager for Chemical Demilitarization. 

Zepata Engineering. 2000. Tests of Blast Chamber for Destruction of Chemical Warfare Materiel. Draft 1 Engineering Report. September. Huntsville, Ala. U.S. Army Engineering and Support Center. 

Modern deflashers recycle the blast media and utilize dust collectors to minimize area pollution. The blasting chamber is effectively sealed... 

Modern deflashers recycle the blast media and utilize dust collectors to minimize air pollution. The blasting chamber is effectively sealed with entry and exit ports designed to avoid dust and media escape. Chemical deflashing using solvents to remove the flash from such components is also used. In addition, water-honing deflashing has been found successful for some types of devices. 

The needle blow method Is also used for squeezed canister handles. A separated blast chamber Is necessary so that no filling material can sediment (environmental protection). It Is therefore Important that the area where the needle enters Is less and regularly stretched to ensure clean, reproducible production. 

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