UPDATE 1-Suncor reports refinery leak, no big output impact

(Adds details, background)

CALGARY, Alberta Aug 24 (Reuters) - Suncor Energy Inc (SU.TO) on Monday reported a vapor release at its Edmonton refinery, but spokesman Brad Bellows said he did not expect a significant impact on production.

Bellows denied local media reports of a fire and explosion at the refinery, which Suncor acquired when it took over Petro-Canada earlier this month. He said there were no injuries, and no risk to the public.

The vapor release was at the coker in the 135,000 barrel a day refinery -- the part of the refinery that converts bitumen from Alberta's oilsands to lighter grades of oil.

Suncor reported an unplanned outage at the Edmonton refinery earlier this month after a hydrogen supplier suffered production problems. Its early August takeover of Petro-Canada made it Canada's biggest energy company. (Reporting by Scott Haggett, writing by Janet Guttsman; editing by Carol Bishopric)