Measures Implemented from the Chuetsu-Oki Earthquake

<Addition/enhancement of piping support>
We added and expanded support for piping (conduit tubes, cable trays, air conditioning ducts).

<Reinforcement of reactor building roofing>
We reinforced the roofing of reactor buildings by adding steel materials to reinforce the supporting truss framework (steel framework).

<Improvements to exhaust tubes>
Supports were added around exhaust tubes used for building ventilation, etc. to give exhaust tubes a more robust structure to bolster their capability to withstand earthquakes.

<Reactor building/ceiling enhancements>
Reinforcing materials were added to, and derailment prevention fittings were enlarged on the travel rail support structure for overhead cranes used to open the reactor vessel lid to prevent them from toppling over.

<Improvements to refueling equipment>
Reinforcing materials were also added to, and derailment prevention fittings were enlarged and expanded on refueling equipment in a similar manner to that for overhead cranes.

<Seismic isolation ERC construction>
A "seismic isolation ERC" was built, integrating equipment and facilities vital for implementing emergency measures and maintaining power and communications to ensure that an emergency response is not hindered in any way in the event of an earthquake (the potential for using this facility autonomously is currently under review)