The interest in developing a nuclear submarine, is being driven by a desire to prevent US, and in the case of Argentina UK, CV battle groups from being able to deploy forces off the Atlantic coast of Latin America.

The picture below is from France’s DCNS Barracuda Class SSN. I’m not sure how accurate it is, but the lack of forward bow planes, and the nose mounted torpedo tubes are of interest.

In most SSNs, the torpedoes are located amidships, to allow for a larger sonar array in the nose.

France would have no involvement in the reactor design, which would be a Brazil-Argentina joint venture.