The Project Cobalt schematics is a schematic in the Fallout 4 add-on Nuka-World. Collecting it unlocks crafting recipes for the Nuka Quantum grenade and upgrades for the paddle ball and Thirst Zapper, as well as weaponized Nuka-Cola ammo, weaponized Nuka-Cherry ammo and weaponized Nuka-Cola Quantum ammo.
The Project Cobalt schematics were the final culmination of the U.S. Army and the Nuka-Cola Corporation's partnership in weaponizing their unique strontium isotope found in Nuka-Cola Quantum. Project Cobalt was created wholly by the scientists of the Beverageer Division below Nuka-World's World of Refreshment. It was tested, finalized, and printed by head researcher Rex Meacham after the bombs fell and shortly before his death from radiation poisoning. Project Cobalt's ultimate goal was to create a substance that could theoretically weaponize anything, the most notable example being the weaponized Nuka-Cola Quantum paddleball.
In the secure beverageer lab beneath the World of Refreshment, near Rex Meacham's skeletal remains, on a table. The location is accessible after restoring the park's main power in the quest Power Play or after Open Season.