A3W reactor

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The A3W reactor was intended for use aboard the USS John F. Kennedy (CV-67). This was a four nuclear reactor per ship design to reduce the cost involved in the construction and operation of the USS Enterprise (CVN-65), with its eight reactors.

Early in the construction, the Secretary of the Navy had the plans changed to save money, and fossil fuel boilers were installed on the Kennedy. Because the plans for the ship did not include a funnel, and to vent exhaust gases away from the flight deck, the funnel on the Kennedy protrudes out from the ship at an angle.

The return to nuclear power for carriers came with the USS Nimtz (CVN 68) Class with the A4W reactor's two reactor per ship design. The reduced cost of building carriers with two reactors makes the cost of the power plants still account for just over half the cost of the entire ship.

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