Union sources said the stoppage would take effect on Monday and could last for four months.

“The COVID crisis has a negative impact on oil products demand, which causes a very sharp deterioration of refinery margins,” Total said.

“In this context, the Donges refinery is operating at a loss. We have decided to halt it (...) for the months to come, awaiting better economic conditions”, it added.

It said the €450 million (US$534 million) modernisation of the 220 000 bpd facility was nonetheless ongoing.