Foam suppression systems

The 1-hour separation required between the different occupancy classifications of Zone 2 and the Zone 2A canyon cannot be achieved due to unsealed and non-rated penetrations in the hot cell canyon walls. Although the potential of a fire occum ng in the Zone 2A canyon is very small, a manual foam suppression system has been provided for fires in the canyon to provide defense in depth. The pre-piped nozzles allow the application of a fixed amount of foam into the hot cell canyon from Zone 2, without exposing operators or emergency responders to high radiation levels, if a fire were to occur. 

Before the storage of the flammable liquid (crude sulfate turpentine, CST), there were no flammable materials in the terminals enclosure. Local fire protection agencies specified a fixed foam-piping, fire-suppressing system as a condition to store flammable liquids. The terminal s management agreed to the terms of the protection package. 

The foam fire-suppression system was neither fully installed nor operational on the three tanks containing flammables. 

Unless the laboratory is a very specialized one utilizing large quantities of flammable liquids, it is unlikely that a foam fire suppression system would be selected as a first choice. Foam-generating... 

Suppression systems that do not use water or modify properties of water work for particular applications. One should refer to applicable standards for design and use of these systems and agents. The agents are carbon dioxide, halons, dry chemicals, foams, and combustible metal agents. 

The space or room containing the incinerator combustion chambers and their accompanying burners should have a fire detection and alarm system. Fire protection may be provided by automatic extinguishing means such as a water sprinkler system or a fire hose station. In particular applications, foam or powder may be more appropriate. Depending on the radiation level expected for some of the components, an automatic or remotely actuated suppression system may be required. 

These substances suppress or inhibit the formation of foam in systems where it may interfere with processing. Foaming occurs due to the presence of proteins, gases, or nitrogenous materials. Examples of antifoaming agents include octanol, sulfonated oils, organic phosphates, or silicone fluids. 

Wet dust suppression systems include external water sprays, water injection through the drill, and foam injection though the diiU. External boom-mounted systems are t5q)icaUy homemade and reduce dust by about 50%. Water-mist injection through the drill is available from several manufacturers. The resulting dust reduction is much better, typically 90% or more. A homemade foam system has also been used successfully (USBM 1982c). It achieved 95% dust reduction at lower water flow rates. 

Uses Antifoam for laundry detergents and other systems with high surfactant cone. foam suppressant and deaerating agent for anhyd. syn. resins Properties Colorless, si. opaque, oily liq. insol. in water dens. 0.99-1.04 g/cm ... 

Uses Foam suppressants for aq. emulsion paints, cement systems, dispersion... 

Respirable Dust—with the objective of providing improvements for protecting miners from exposure to respirable coal mine dust. Study areas have included (a) dust formation fb) dust control, and (c) dust measurement. Tests have included the infusion of water into coal beds for control of respirable dust the use of water-based, high-expansion foaming systems in conjunction with continuous mining machines, to reduce dust at the face the use of roam systems for dust suppression on conveyors and transfer points and the use of prototype dust meters. See also Pneumokonioses. 

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