Fire pump diesel

Taxonomy No. 4.2.4.1 Equipment Description PROTECTION SYSTEMS-FIRE-FTRE WATER PUMPS - DIESEL ... 

Loss control features include combustible gas detectors installed around the containment area and transfer system. A diesel-driven fire pump is capable of handling the emergency demand for 4 hr. A water deluge system has been installed around the storage tank and transfer pump. 

The commander of the plant fire brigade sent a team member to the fire pump house. The electric fire pump was inoperable due to the power outage. One diesel fire pump was known to be impaired due to mechanical problems and other diesel fire pump had failed to start because its batteries were dead. Several maintenance personnel were sent immediately to repair this diesel fire pump. 

The local fire department arrivedjust after the explosion at 11 22 A.M. With the limited water supply on two of the fire trucks and the utilization of another fire truck to pump water directly from a nearby cooling water tower basin, the firemen were able to slow the fire spread. By 11 30 A.M., the Maintenance Department was able to transfer the set of batteries from the impaired diesel fire pump to the other diesel fire pump. On completion of this task, this diesel fire pump was started. The automatic deluge sprinkler protection was severely damaged by the fire/explosions and had to be valved into the off position. Three fixed monitors were turned onto lull flow and directed at the fire. Also, the firemen and fire brigade used two hose streams olF nearby fire hydrants for fire fighting purposes. At 11 58 A.M., the fire was under control. Final fire extinguishment was accomplished by 12 10 p.m. 

No. 1 diesel fire pump taken out of service due to over heating during annual performance testing by outside agency. (Maintenance records) No. 2 diesel fire pump fails to start automatically due to weak batteries. (Maintenance records) Maintenance recharges No. 2 diesel fire pump batteries. (Maintenance records)... 

Last maintenance check of No. 2 diesel fire pump and the electric fire pumps. Test run of 5 minutes, (maintenance records)... 

AM. Fire brigade member reaches pump house and finds electric fire pump inoperable due to power failure, one diesel fire pump inoperable due to known mechanical problems, second diesel would not start due to dead batteries calls for maintenance help. Several maintenance employees dispatched to repair diesel fire pump No. 2. 

AM. Maintenance completes move of batteries from No. 1 diesel fire pump to No. 2 diesel fire pump. No. 2 diesel fire pump is started. 

Uprating of seawater lift pumps for use as fire protection standby pumps. This deleted one of two diesel-driven fire pumps. 

Water pressure is a key consideration in terms of the adequacy of application and system operation and maintenance. While some domestic supplies have high pressure systems, most are in need of pressurization, as is water from bodies of water and tanks. Fire pumps are routinely used, most often in multiple installations with different means of power drive (e.g., electric, diesel, or steam). When fire pumps operate at high pressures, there is the potential for leaks and line fracture. Periodic maintenance, including hydrostatic testing, will help minimize the potential for such failures. 

As other speakers at this symposium have described, the use of fuel gas produced by biomass or solid waste gasifiers can reduce the use of petroleum fuels in stationary combustion equipment (oil-fired boilers, diesel engines for electric generators or irrigation pumps). Stationary engines and furnaces, however, are not the only big users of petroleum fuels in lesser developed countries (or LDCs, the term we will employ to describe the 88 poorest nations in the world). As is the case for industrialized nations, lesser developed countries need liquid transportation fuels, and probably will for a long time. Brookhaven reports that most LDCs have increased their dependence on highway transport over the last two decades (lb). 

System foundation. Provide lateral and longitudinal sway bracing. Use diesel drivers for fire pumps. Use of PVC underground pipe. 

Water supplies for sprinkler systems can be provided by public or private systems, or a combination of both. In both instances, it is customary to also provide for a fire hose flow allowance. This allowance is particularly important with fire control sprinkler systems. Public systems can be augmented with fire pumps typically powered by a diesel or electric driver. Private systems are usually supplied by automatic fire pump(s) taking suction from a tank, reservoir, or natural body of water such as a river. The water supply should be capable of meeting the hydraulic requirements of the sprinkler system, have an adequate duration, and be considered reliable. In some cases, it may also be necessary to have two sources of water to improve the reliability of the system. This is particularly relevant in areas having an unreliable public water supply. Fire pumps should be automatic starting. If a reliable electrical supply is not available, a diesel driven fire pump should be used. 

In parts of India, fire was made by adiabatic compression of air in a fire pump —wooden tubes with a wooden piston that contained some tinder in a hollow at its end—basically identical with the ignition in the modern diesel engine. 

The Kozloduy NPP plans to modify the gas fire extinguishing system, to improve the startup speed of diesel fire pump and to seismically qualify the fire alarm facilities. 

It does not require ac power or diesel-powered fire pumps. 

The alternative to the use of the PCCWST would be to install a conventional fire system, with a diesel driven fire pump and some mechanism to limit the maximum amount of water that could be delivered to the clean side of the Auxiliary Building. Such a system would need to be very reliable and seismically qualified, and would thus be much more expensive than the simple and intrinsically reliable design solution proposed. The PCCWST option is thus ALARP. 

Easy to connect a mobile fire pumping engine to the new seismically qualified water tank, should the fixed diesel generators fail when demanded. 

The three drivers recognized by the NFPA code on fire pumps are diesel, electric and steam. The diesel fire pump is the preference of most insurance companies. They have a long history of satisfactory service. These units tend to be more expensive especially when they are used with vertical turbine pumps. With vertical turbine pumps, they require a right-angled drive which significantly increases the cost. They are self-contained and do not depend on outside utilities. 

Fire pump supervision should include pump running and room temperature checks on all pump installations. For electric pumps, the supervision should include power failure and phase reversal. For diesel pumps, supervision should include engine trouble and switch-not-in-automatic-position detection. There are many other common and uncommon supervisions available. 

Main fire pumps should be automatically controlled to start whenever there is a demand that reduces system pressure below a set point of say 7 barg. They should be large enough to keep the pressure above that set point at the most distant hydrant and at the system design flow rate. Spare pumps should be diesel engine driven with independent fuel tanks. Where steam is available, steam-driven pumps may be used to supplement the electric- and diesel-driven units. 

In extremely cold environments, engines can quickly become difficult, sometimes nearly impossible, to start. If ordinary gasoline- or diesel-oil-fired heaters are used, the coolant circulation pump, air fan, etc, must be powered from the vehicle s batteries, thus curtailing the time the system can be used, especially at very low temperatures when it is needed the most. By adding PbTe thermoelectrics to such heater systems, about 2% of their thermal output can be turned into electricity to mn the heater s electronics, fuel pump, combustion fan, and coolant circulation pump, with stiH sufficient power left over to keep the vehicle s battery fliUy charged. The market for such units is in the hundreds of thousands if manufacturing costs can be reduced. 

Emergency equipment, such as diesel-driven fire water pumps and generators. 

The process area has combustible gas detectors, fireproofing, and a water deluge system. Cable trays are protected with deluge, and portable dry chemical extinguishers are in the process area. Diesel-powered fire water pumps can provide a maximum fire water demand for 4 hr. 

A critical safety issue of using diesel-ethanol blends relates to flashpoint and flammability. E-diesel blends containing 10-15% ethanol have the vapor pressure and flammability limits of ethanol. This means that ethanol concentrations in enclosed spaces such as fuel storage and vehicle fuel tanks are flammable over the temperature range 13-42 °C. Thus, there are higher risks of fire and explosion than with diesel fuel, or even gasoline. Other vehicle performance-related concerns are (a) a decreased maximum power (b) an increased incidence of fuel pump vapor lock and (c) a reduced fuel pump and fuel injector life due to the decreased lubricity of ethanol. 

Eire water pumping capacity (flow rate) should be sufficient to provide the required amount of water at required pressure to the fire areas having the greatest demand. At least 50% of the pumping capacity should be from diesel-driven pumps. Eire water pumps should have a minimum capacity of 1,500 gpm (5,700 Ipm) and can range up to 5,000 gpm (18,930 Ipm). Earger pumps... 

The acceptable drivers for fire water pumps are electrical motor and diesel engine. If only one driver is used, it should be a diesel, unless the reliability of electrical power can be ensured by onsite diesel emergency power or there are two independent reliable power supplies. 

The diesel engine is the most dependable engine for driving fire water pumps and should be the only type of engine acceptable for this service. The following minimum equipment should be provided for diesel engines ... 

The recommended location for the diesel fuel tank is outdoors, just outside of the building. Where location of the diesel fuel storage tank outside of the fire water pump building is not appropriate (cold weather), sprinkler protection of the fire-water pump house is recommended. Pump controllers should be sealed and splash resistant. 

The No. 2 diesel fire water pump was down because its batteries were dead. The dead batteries were detected and recharged in the 7/3/2001 monthly check, but they were not replaced or rechecked. (Mechanical integrity)... 

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