D4 | Projects

The D4 Project team was responsible for safely decommissioning, deactivating, decontaminating, and demolishing (D4) Hanford’s facilities located along the Columbia River. Many of the structures opened during World War II or the Cold War. The work was full of hazards associated with heavy equipment, hazardous substances and highly contaminated radioactive facilities.

D4 activities occurred in Hanford's 100 Area (primarily N Area) and 300 Area. The 100 Area is where Hanford's nine plutonium production reactors were located. The 300 Area is where the fuel was manufactured for each of the reactors. Research and development activities also were performed in the 300 Area. This included fuel and waste form development activities, as well as research into the biological effects of radiation.


100 Area Activities

300 Area Activities