A senior French official in charge of nuclear safety, Marcel Jurien de la Graviere, is due back in French Polynesia this week.
However, a key nuclear test veterans group, Moruroa e Tatou, won't meet him after the French Polynesian health minister decided to change the make-up of the Council dealing with the follow-up of the French weapons tests.
The minister, Jules Ienfa, decided to drop ministers and assembly members from the Council, known as Coscen, to depolitise the body.
The minister wants the council to include only people with environmental and medical qualifications.
The head of Moruroa e Tatou has labeled Coscen as a pseudo commission.
During his four-day visit, Mr de la Graviere is to discuss the clean-up of the former test sites in the Tuamotu and Gambier islands.