Japan faces further delay in nuclear fuel recycling

Japan Nuclear Fuel (JNFL) has again extended the start-up of the country's first commercial nuclear fuel reprocessing plant, as it needs extra time to enhance safety features.

JNFL, a joint venture of Japanese power utilities, now aims to finish construction of the recycling plant at Rokkasho in north Japan's Aomori prefecture in the April 2026-March 2027 fiscal year, instead of the previous target of "as early as possible" in April-September 2024. The company has also pushed back the completion of building the mixed oxide fuel fabrication plant to 2027-28 from April-September 2024.

This is the 27th postponement, far behind its original target of 1997. The repeated delays stemmed from technical issues and safety measures required following the 2011 Fukushima nuclear disaster.

Recycling spent nuclear fuel is becoming a critical issue for Japan, as the natural resource-poor country sees the quasi-domestic fuel as an important power source to ensure its energy security and spur its decarbonisation. But the country faces growing constraints on its ability to store radioactive waste, with repeated delays in setting up the reprocessing plant, which may threaten Tokyo's efforts to restart more reactors.

Spent fuel has accumulated to 2,968t uranium fuel (tU) at the Rokkasho reprocessing plant, nearing its capacity of 3,000tU. The waste has piled up since 2000 in anticipation of its operation and since shipments to the UK and France by utilities ended in 2001.

Japan's overall nuclear waste storage, which has combined capacity of about 24,440tU including Rokkasho's facility, was 81pc full at the end of March 2024, up from 75pc in 2019, according to the trade and industry ministry.

By Motoko Hasegawa