a) Construction should be protected noncombustible. Roofs should
be Factory Mutual Class I (see FM APG, Approval Guide) or Underwriter's
Laboratories (UL) "Fire Classified" construction, (see UL 790, Test for Fire
Resistance of Roof Covering Materials). If existing structures are fire
resistant or combustible construction, provide automatic sprinkler protection.
b) Provide areas containing large amounts of combustibles with
automatic sprinkler protection and separate from boiler areas by a minimum of
1 hour fire rated walls.
c) Provide explosion relief panels in all spaces storing explosive
solids, liquids or gases. These areas include enclosed coal handling
facilities, dust collectors, wood preparation areas, coal bunkers or silos,
d) Standpipes and Hose Systems: Refer to MIL-HDBK-1008A. Install
1-1/2 inch hoses in coal facilities in accordance with NFPA 14, Standpipe,
Hose Systems. Where there is equipment such as dust collectors, conveyors,
etc., on the roof, hose outlets shall be provided. Provide freeze protection.
e) Provide a complete fire and evacuation alarm system throughout
facilities. Provide pull stations at exterior exits and sufficient evacuation
alarms to overcome the higher noise level found in power plants. Visual
alarms should be considered in high noise level areas. Smoke detection
systems should be considered in control rooms, switch gear rooms, and similar
electrical rooms. All fire protection, fire and evacuation alarm, and smoke
detection systems should tie into the base fire alarm system. Installation
shall be in accordance with NFPA 72A, Local Protective Systems, NFPA 72B,
Auxiliary Signal Systems, and NFPA 72D, Proprietary Signal Systems.
f) Portable fire extinguishers shall be provided throughout, be of
a type suitable for the hazard to be protected, and be in accordance with NFPA
10, Portable Extinguishers.
g) Provide exit and emergency lights throughout. Exit signs shall
be constantly lit. Provide emergency lights in all areas of the plant,
particularly in operating areas. Use local lighting circuits which have
battery backup even if the plant has an emergency generator.
Consider fixed extinguishing systems for all dust collection
i) Where there is potentially hazardous equipment on the roof of
the power plant such as dust collectors or conveyors, an emergency exterior
means of reaching the roof shall be included.
j) Access to the roof by stairs shall be considered where it is
necessary for plant personnel to perform regular routine work on the roof.