Summary of supply facilities damage of Tokyo Gas caused by the Great East Japan Earthquake and verification of the accuracy of pipeline damage estimation

Abstract

The Great East Japan Earthquake did not damage any important facilities used by Tokyo Gas for city gas production and supply operations, but some low pressure pipelines with low earthquake resistance were damaged, forcing the company to suspend supplies of gas to about 30,000 homes to preserve safety. This report briefly describes Tokyo Gas's response to the Great East Japan Earthquake, which is centered on the super-dense real time monitoring earthquake system. And, it verifies about the accuracy of pipeline damage estimation.