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Our Business / Thermal Power StationsDisaster Prevention Measure of Fuel Tank

Related Laws and Disaster Prevention Measures

Fuel tanks installed in thermal power stations abide by the Fire Service Act, the Act on the Prevention of Disasters in Petroleum Industrial Complexes and Other Petroleum Facilities, and the High Pressure Gas Safety Act, etc. Measures for the tanks are taken based on the acts. With regards to power stations that fall under the Act on the Prevention of Disasters in Petroleum Industrial Complexes and Other Petroleum Facilities, depending on the scale, the following countermeasures are taken.

  • Establishment of management systems through the appointment of a disaster prevention manager and a deputy disaster prevention manager and the creation of disaster prevention regulations
  • Installation of disaster prevention facilities such as chemical fire trucks, oil recovery vessels, and oil fence expanding ships, as well as dispatching of necessary disaster prevention personnel, through self-defensive and collegial organizations for disaster prevention
  • Establishment of reporting systems and other systems for disaster prevention

Contents of Measures

Thermal power stations mainly handle LNG (liquified natural gas), LPG (liquefied petroleum gas), and heavy crude oil. The following leakage and fire prevention measures are taken for such hazardous materials.
To prevent hazardous materials from firing, preventing three following conditions from establishing is important.

The 3 Conditions for Fires and Explosions Fire Prevention Measures
①Occurring in a Closed Space(Presence of Combustibles) Installing fuel facilities in outdoors and not making in a closed space
②Flammable Gas Mixed with a Certain Ratio of Air(Presence of Oxygen)
  • Gas detectors to early detect leakage of hazardous materials, low temperatures detectors (LNG and LPG), oil leakage detectors, warning devices, premises monitoring cameras are installed and constantly monitored at all times in the central control room
  • Condition check by daily multiple patrol
  • Installation of a liquid-proof barrier around ground tanks to prevent leakage spreading
  • Adoption of underground tanks with the liquid level below ground level
  • Installation of evaporation control facilities and enhanced diffusion facilities (water curtain)
  • Installation of isolation valves at regular intervals to isolate leakages
③Presence of an Ignition Source
  • The use of fire within the power station, where the full attention must be paid in the use of any fire, is limited or managed through the use of a notification system subject to the strict safety measures
  • Earthing the main facilities within controlled areas to prevent sparks from generating by static electricity
  • Antistatic bars to remove static electricity. Also, explosion-proof equipment

In the unlikely event of a fire, facilities are arranged so that the heat and gas generated will not affect the outside of the premises. Prompt firefighting activities are also enabled by using fire prevention and extinguishing facilities on the premises and improving disaster prevention systems, including on-site self-defensive fire brigades in the power station grounds, firefighting vehicles, public firefighting, owning firetrucks for collegial disaster prevention, and disaster prevention vessels (when land transportation is cut off), etc.

[Main Facilities for Fire Prevention and Extinguishing]

  • Foam Fire Extinguisher
  • Sprinkler Facilities
  • Drainage Facilities
  • Inert Gas Extinguisher
  • Water Curtain (LNG and LPG)
  • Chemical fire extinguishing Facilities
  • *Including chemical fire engines

Approach to Safety