Tokyogasgroup csr report

Technical Development

Earthquake and Disaster Preparedness

We are promoting the advancement of safety technology, including focusing efforts on the development of disaster prevention systems in readiness for major earthquakes and other disasters to achieve disaster-resistant and stable gas supply.

Ultrahigh Density Real Time Earthquake Disaster Preparedness System – SUPREME

Supreme is a real-time earthquake disaster prevention system to prevent secondary disasters in a major earthquake by gathering data from seismographs at around 4,000 locations and using remote operation where necessary to control gas supply in block units.

System Summary

We install seismographs called safety sensors in the district pressure regulators which supply gas at low pressure. Installed at an extremely high density of around one unit per 1km2, they automatically shut off gas supply when detecting an earthquake which could potentially harm conduits and structures. SUPREME is a system which shuts down gas supply in a low-pressure gas conduit network, based on information from those seismographs.
Medium- and low-pressure conduit networks are divided into multiple blocks. Therefore, in an emergency, Supreme can stop gas supply to only those areas where damage is heavy, minimizing the area where gas supply has to be stopped.
The collected seismic data is also used in rapid and accurate analysis to prevent secondary disasters such as by estimating damage. During the Great East Japan Earthquake, seismic data was collected from approximately 4,000 locations in about five minutes to make swift decisions on whether to stop supplies.

Locations of Seismographs in the Tokyo Gas Service Area and Temblor Strengths in the Southern Kanto Region during the Great East Japan Earthquake on March 11, 2011

Locations of Seismographs in the Tokyo Gas Service Area and Temblor Strengths in the Southern Kanto Region during the Great East Japan Earthquake on March 11, 2011
 
DFF Inc., Corporate Social Responsibility Sect, General Administration Dept., Corporate Planning Dept., Resources & Global Business Division, Energy Solution Div, Power Buisiness Dept., Pipeline Network Division, IT Division, Residential Sales Div., Fundamental Technology Dept., Energy Solution Div, Environmental Affairs Dept., Purchasing Dept. , Health Insurance & Employees' Welfare Sect., Personnel Dept., Internal Audit Dept., Audit & Supervisory Board Member's Office, Compliance Dept., Regional Development Div., Finance Dept, TGES, TOKYO GAS COMMUNICATIONS, INC.