Net explosives weight

The size, shape and materials of construction depend on the function of the facility, the net explosive weight (NEW) for the worst-case accidental explosion in the facility, and other factors. Both reinforced concrete and steel have been used as materials, and shapes range from box (room) shaped, through horizontal and vertical cylinders to spheres. Generally, the room-shaped structures are most economically designed and constructed of reinforced concrete, while cylindrical and spherical shapes are most efficiently designed when made of steel. 

The explosive wing utilizes individual bays for maintenance operations that can isolate an area contaminated by a leaker or agent spill. Although no explosions are expected to occur in this facility, explosive blast walls are incorporated to permit facility utilization during its 25 year life expectancy. The design of the explosive blast walls is in accordance with TM 5-1300 for 1,000 pounds of net explosive weight (NEW) per bay requiring a wall thickness of 30 inches. 

The number of munitions fed per cycle will depend on the munition size, the quantity of agent to be destroyed, and the explosive content (net explosive weight). Estimated hourly throughput rates for some munitions have been provided by... 

OB of nonfragmenting explosives is conducted in burning trays, which are designed without cracks or angular comers to prevent the buildup of explosive residues. The depth of explosive material in a tray may not exceed 3 inches, and the net explosive weight of materials in a tray may not exceed 1,000 lb. The distance between the trays for explosive devices is determined by hazards analysis, but, in the absence of such analysis, trays are placed parallel to one another and separated by at least 150 ft. These distances may vary for OB of bare explosives or explosives-contaminated soils. When wet explosives are being burned, trays may be lined with nonexplosive combustible materials, such as scrap wood, to ensure complete combustion. An OB tray may not be inspected until 12 hours after the conclusion of the bum, and a tray may not be reused until 24 hours after the conclusion of the bum or until all ash and residues have been removed from the tray. 

The net explosive quantity (NEQ) (total net weight of explosive, incendiary and smoke substances) in the building or stack. 

The Explosives Weight Parameter. Based on common knowledge about scaling of explosion effects, it seemed obvious that the nondimensional explosives weight parameter/ is proportional to the cube root of the explosives weight. The explosives weight in this formula is defined as the total amount of explosives reacting within a short time, expressed in an equivalent mass of the explosive TNT. This quantity is often also described as NEQ (net explosives quantity). 

Low -molecular-weight ozonides are explosive and are theretore not isolated. Instead, the ozonide is immediately treated with a reducing agent such as zinc metal in acetic acid to convert it to carbonyl compounds. The net result of the ozonolysis/reduction sequence is that the C=C bond is cleaved and oxygen becomes doubly bonded to each of the original alkene carbons. If an alkene with a letrasubstituted double bond is ozonized, two ketone fragments result if an alkene with a trisubstituted double bond is ozonized, one ketone and one aldehyde result and so on. 

The explosive properties of nitrosugars have been examined by Monasterski [13]. This author reported that saccharose octanitrate developed a heat of explosion of 950 kcal/kg, and produced in the lead block an expansion of about 300 cm3. In the drop test it exploded from the impact of a 2-kg weight falling from a height of at least 20 cm. Maltose octanitrate, in the lead block, caused a net expansion of some 260 cm3. 

Fig. 3.145 The net—swing length of the pendulum with various sample weight for substances that propagate explosively Data from Nippon Kayaku Co. tt Data from Nippon Oil ft Fat Co.

A 0.4-g sample of explosive, pressed at 3000 psi into a No. 6 cap, is initiated by lead azide or mercury fulminate (or, if necessary, by lead azide and tetryl) in a sand test bomb containing 200 g of on 30 mesh Ottawa sand. The amount of azide of Tetryl that must be used to ensure that the sample crushes the maximum net weight of sand, is designated as its sensitivity to initiation, and the net weight of sand crushed, finer than 30 mesh, is termed the sand test value. The net weight of sand crushed is obtained by subtracting from the total amount crushed by the initiator when shot alone. 

The history of artillery is the quest for precision and accuracy. Ballistic science is concerned with the properties of classical physical mechanics governing the motions of bodies under force. With artillery, these motions involve the mechanics of gun machinery, the dynamics of propellants, and the trajectory of discharged projectiles. The basic dynamics of artillery fire-whether bow and arrow, catapult, howitzer, or railroad gun-are based on Newton s second law of motion Net force is the product of the mass times the acceleration. Traditionally, for artillery this has meant that the amount of destruction was equal to weight of the projectile times how fast it could be propelled. In modern warfare, this destructive force is multiplied by adding explosives and submunitions to the projectile. 

Explosives - More than 55 pounds (25kg) net weight of a Division 1.1, 1.2 or 1.3 material, or an amount of a Division 1.5 material requiring a placard. 

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