IEEE 833-1988 pdf free

04-28-2021 comment

IEEE 833-1988 pdf free.IEEE Recommended Practice for the Protection of  Electric Equipment in Nuclear Power Generating Stations from Water Hazards.
IEEE 833 recommended that first consideration be given to locating electric equipment such that direct or indirect sourcesof water hazard will not be present.Next, consider locations that can be enclosed to restrict the entry of a water hazardor where design features can direct water hazards away from the equipment.
Where the foregoing preferred locations are not practical or desirable to implement, consider equipment design.selection or modifications to make the equipment resistant to water hazards.
Additional protection from sources of water hazard are best accomplished by proper sealing measures or physicalshielding.This treatment should not interfere with ventilation or other design considerations (for example, seismic,thermal ), or unduly restrict maintenance activities. It should be further understood that when water is to be applieddirectly to a specific item of electric equipment as a means of extinguishing a fire in or on that equipment, sealing orshielding should not prevent this; however, any other electric equipment in the vicinity should not be affected by thisaction (for example, battery and flammable battery-rack fires are best extinguished by flowing water over them to flushaway contaminants, remove short circuits caused by contaminants, and to cool the equipment).
Electric equipment rooms located adjacent to areas where potential water hazards exist that could reasonably bepostulated to enter the rooms, should be designed and constructed to be resistant to the entry of water.Doors shouldopen toward the source of water.
Penetrations through walls, floors, and ceilings (roofs) are high-risk areas and should be properly sealed to the extentnecessary to preclude water-hazard intrusion.
Water-filled piping located within, or penetrating, electric equipment rooms should be avoided or assessed as to itspotential to become a water hazard.
lf a source of water, which can be reasonably postulated to be a water hazard, exists in or is added to an equipmentroom area, electric equipment should be protected in accordance with the recommendations in Section 7.
Proper sealing of penetrations should limit any transfer of water or moisture through those penetrations to an amountthat would not prevent the equipment from functioning in an acceptable manner.IEEE 833 pdf download.

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