When a nuclear plant exploded in northern Ukraine in April 1986, the Soviet authorities went to great lengths to control information about the disaster — even cutting off private telephone conversations when the word Chernobyl was used.

Now, in a strange turn more than three decades after the meltdown, the exclusion area around Chernobyl is gaining a following as a tourism destination, apparently propelled by the popularity of a TV mini-series about the blast that was broadcast in the United States and Britain last month.

The mini-series, HBO’s “Chernobyl,” fictionalizes the events in the aftermath of the explosion and fire at the plant’s Unit 4 nuclear reactor. It has been one of the highest-rated shows on the IMDB charts.

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