The operator of the Oi nuclear power plant in Fukui Prefecture is considering scrapping two aging reactors at the complex as it may be too costly to make upgrades required to meet new post-Fukushima safety standards, a source said Tuesday.

Kansai Electric Power Co. will make a final decision by the end of the year over the Nos. 1 and 2 reactors at the four-reactor plant located on the Sea of Japan coast, which in 2019 will have been in operation for 40 years, the source said.

The units each have a capacity of 1,175,000 kilowatts, making them the largest to be decommissioned aside from those at Tokyo Electric Power Company Holdings Inc.'s disaster-hit Fukushima No. 1 nuclear complex.