Japan’s nuclear safety authorities raised the alert level at the Fukushima plant last week to a maximum seven. This means they consider the emergency to be as serious as the Chernobyl disaster in the Soviet Union. That seems a rather overstated comparison to me.

Twenty-five years after the explosion at the Ukrainian facility, I vividly recall every detail of those terrible days of April 1986. I was a 26-year-old foreign correspondent working in Moscow for Reuters news agency. On Friday, April 25, I flew to Kiev to spend a couple of days with Rhona, an ebullient Scottish friend who was teaching at the city’s university under a British Council programme. I was the only western journalist in Kiev that weekend.

While we caroused the night away, extraordinary events were unfolding 130km to the north. Technicians were conducting experiments that involved the disabling of automatic shutdown mechanisms at the plant’s fourth reactor. After a tremendous power surge, the reactor blew up at 1.23am on Saturday, April 26.