Japan's largest electricity producer Jera aims to resume coal and biomass co-firing at the 1.1GW Taketoyo plant in 2027's first quarter, after a fire halted plant operations in January.
Jera announced on 22 November that the thermal power plant in central Japan's Aichi prefecture would resume co-firing wood pellets with coal at a rate of 8pc, around the end of the 2026-27 fiscal year ending in March. This will come after its safety measures are completed. The plant's co-firing rate was 17pc before the serious fire, which was caused by an explosion of dust from wood pellets. The company will consider increasing the co-firing rate again in the future, provided safety can be ensured.
But the plant will restart coal-only combustion in early January 2025, operating mainly during the summer and winter seasons, when electricity demand is high. Jera will keep operation rates low at Taketoyo and other coal-fired plants when electricity demand is low and rely more on gas-fired generation, to achieve its initial plan to cut CO2 emissions through co-firing at Taketoyo.
Taketoyo started co-firing operations in August 2022 and burned around 500,000 t/yr of wood pellets imported from the US and Vietnam. It will burn 200,000 t/yr after it resumes co-firing at 8pc.
The plant will slow down the speed of wood pellet conveyors to reduce friction as a part of safety measures, which means it must also reduce its coal and biomass co-firing rate. It is also currently working on other safety measures, such as installing air pressure conveying facilities dedicated to wood pellets and explosion suppressor systems to inject fire extinguishing agents.
The outage at Taketoyo has encouraged Jera to boost replacement gas-fired generation, with the extra gas-fired costs accounting for most of the estimated cost resulting from the shutdown, which could be tens of billion yen in the 2024-25 fiscal year ending in March.
