The train, carrying three casks, is the second in a series of 10 planned to pass through northern France, the last being scheduled to do so in 2013.
The wagons give off the equivalent of the annual acceptable dose of radioactivity, according to Laure Hameau of the anti-nuclear network, Sortir du nucléaire.
"This train is rolling through very crowded areas in the Parisian suburbs, on suburban rail lines," Sortir du nucléaire's Charlotte Mijeon told RFI. "People are completely unaware of it and it's important to say there is a risk, it's hidden, and for us it's a big scandal."
Protests against the train took place at the towns of Villeparisis and Aulnay-sous-Bois, with Aulnay’s mayor, Gérard Ségura, among demonstrators demanding to be notified if nuclear cargoes pass through the areas in the future.
A request to test the radiation levels from Sortir du nucléaire and the Sud-rail union while the train stopped at Le Bourget marshalling yard was turned down.
"These shipments are as secretive as possible," says Mijeon. "The people shipping them have no interest in the public knowing how dangerous it is. The same thing happened a year ago when there was a radioactive waste train from La Hague to Gorleben in Germany. The general director of the train company, SNCF, himself tried to forbid any measurements were made."
The transport of nuclear waste from Italy to La Hague was suspended after anti-nuclear protests.