Underground drum

For underground burial, incorporation of the highly radioactive fission (HRF) products into a glass or ceramic material is better than placing it in metal storage drums. 

As with cations and anions, soil interaction with molecules happens only if the substance contacts soil particles. Surface spreading or burial is insufficient the wastes must be mixed with the soil to react with it. The sensational Love Canal case, for example, involved the burial of organic liquids in 55-gallon (215-L) drums stacked in shallow trenches underground. I-tad the organic liquids been mixed and allowed to interact with the soil, the leakage and movement after the thin steel drums corroded might never have happened, and it certainly would have been less severe. 

Application of synthetic rope technology to Iriction hoists in deep underground mines has the potential to allow for effective production from significantly greater depths than currently possible with steel wire ropes. The primary difference between the application of steel and synthetic ropes to friction hoists at today s and future depths is that steel rope is limited by the strength per mass properties of the rope while synthetic rope is limited by the friction over the drum generated by the coimterbalance mass and system design. 

A portion of a typical mine site power distribution system is shown in Figure 3. This example shows the application of a diesel generator on an emergency power distribution system bus that includes a drum-type auxiliary hoist and other equipment that is also used for emergency egress, air compressors for underground supply air, and resistive load bank used to absorb excess regenerative power from the hoist, if necessary. 

The hoisting system considered is a double drum hoist with a skip/skip configuration. A friction hoist was not considered for this apphcation because of the number of ropes that would have to be handled underground with the similar power requirements did not give a... 

Underground methods have been used in Morocco for many years. Ore has been produced by a combination of mechanized and classical methods. Conventional room and pillar methods were used with the aid of short-wall drum shearers. Underground methods are also used in Tunisia and Egypt to mine gently sloping sedimentary... 

Underground ore transport is now accomplished almost entirely by conveyor belts. Conveyor belts may be suspended from the roof or set on the floor. For the highest capacity mines with continuous (borer or drum) mining machines, flexible belt conveyors attached to or directly fed from the miner and directly feeding a panel belt have produced considerable savings. Some mines... 

When the waste has become less radioactive, it is buried in concrete inside steel drums. These are then dumped at sea, or buried underground. 

Confined spaces include, but are not limited to, storage tanks, towers, drums, boilers, furnaces, sewers, ventilation and exhaust ducts, underground utility... 

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