Huntington Ingalls has received a $194 million U.S. Navy contract modification for the refueling complex overhaul of the USS George Washington.

The modification extends the period of performance from 12 to 18 months for continued advance planning of the carrier's refueling complex overhaul.

It also continues the overhaul's advance planning, ship checks, design, documentation, engineering, fabrication and preliminary shipyard or support facility work to prepare for the overhaul accomplishment, expected to begin in August 2017.

The contract modification also establishes the labor requirement for engineering and production services in support of fixing contamination the carrier incurred after the Fukushima Nuclear Power Plant disaster that followed the tsunami that struck Japan in March 2011.

The modification also provides for engineering, planning and production oversight of work performed by the Navy, Norfolk, Va., area providers and other contractors in managing remediation efforts.

Naval Sea Systems Command is the contracting activity.

The carrier is the sixth in the Nimitz class and was commissioned in 1992.