Permanent Countermeasure Work Completed for the Fracture in Joetsu Thermal Power Station's Steam Turbine Moving Vane

Chubu Electric Power would like to announce that today it completed its permanent countermeasure work for the fracture in the moving vane of Joetsu Thermal Power Station Unit 1-1's low-pressure steam turbine.

Following the fracture that occurred on April 9, 2013 in the low-pressure steam turbine of Joetsu Thermal Power Station Unit 1-1, Chubu Electric Power decided to replace the Station's turbines with new ones that are free from self-excited vibrations(Note)

Chubu Electric Power began countermeasure works for Unit 1-2 on October 17, 2015. This was followed by works for Units 1-1, 2-1, and 2-2, and all countermeasure works were completed today.

Joetsu Station managed to restore its original rated output, 595,000 kW, as a result of the countermeasure works.

Chubu Electric Power will continue to expend all possible efforts to manage the safety of its equipment and work to stably supply electric power to customers.

(Note) This is an event where small vibrations in the moving vane build up as a consequence of receiving steam-induced energy

[Overview of Joetsu Thermal Power Stations ]