The Nuclear Workers' Association has paid tribute to French Polynesia's foremost expert on the French nuclear weapons tests, describing him as a courageous man who put the truth first.
Bruno Barrillot has died in Tahiti, aged 77.
His legacy includes his work on the rehabilitation of the former test-related military sites on Moruroa and Hao as well as assisting in efforts to amend the French nuclear testing compensation law.
He was also the co-founder of French Polynesia's nuclear test veteran organisations.
The Nuclear Workers Association's president, Roland Oldham, told Amelia Langford that Mr Barrillot is known all over the world for his work and his death is a great loss.
He says the group wants to archive Bruno Barrillot's work so everyone has access to his research.