Stable Energy Supply
To consistently supply electricity at all times
"Periodic inspection" vital for stable energy supply
We are required to perform periodic inspection in compliance with related laws and regulations. The periodic inspection is conducted in a few-years cycle according to a predetermined plan.
A periodic inspection may take approximately 2 to 4 months to dismantle giant components, carry out thorough inspections of as many as 70,000 parts and then perform repairing as necessary.
Periodic inspections, which are conducted with facilities being in a completely idled status, have an essential role in achieving safe operation of and stable power generation by thermal power plants.
Since October 2011, we have often postponed the timing of periodic inspection for thermal power plants when it conflicts with peak demand according to the provisions about disaster in the Electricity Enterprises Act in order to assure stable power supply.
Total 8,000 workers engage in detailed inspection of each piece of parts.
Sakaiko Power Station Unit 5 (thermal power plant in Sakai-city, Osaka prefecture, 400MW) underwent periodic inspection from September 16 through November 4, 2014 when the electricity demand was relatively low and stable after mid-summer.
Total approximately 8,000 workers, about 250 daily at the largest, work together to pursue periodic inspection activities.
If a highly degraded part were missed and determined acceptable, it would lead to an incident or accident. To avoid the case that a plant becomes unable to generate electricity due to imperfect maintenance, engineers are dedicated to intensive inspections for as many as 70,000 parts one by one; sometimes they ride on equipment, sometimes they go under equipment and sometimes they make fine adjustments in millimeter units using a hammer.
We will continuously make an exhaustive effort to supply stable and safe electricity to our customers by performing detailed periodic inspection placing top priority on safety.