A Soviet filmmaker who worked at the Chernobyl power plant within days of the nuclear accident there last year has died of radiation sickness, the weekly Nedelya reported today.

Nedelya said Vladimir Shevchenko, director of the film, ''Chernobyl: A Chronicle of Difficult Weeks,'' died two months ago from an excessive dose of radiation.

Two cameramen who worked with him were receiving hospital treatment, the weekly said.

Mr. Shevchenko's death has not been added to the official Soviet casualty toll from the explosion and fire at the nuclear power plant on April 26 last year.

The official death toll has stood at 30 since last summer, and Soviet nuclear authorities repeated that figure on the first anniversary of the explosion and fire, the world's worst nuclear accident. Film Shown at Festival