Ereyga "Plutonium pit" caadi ahaan waxa loola jeedaa xudunta hubka nukliyeerka, kaas oo ka kooban qayb ama "pit" oo ka samaysan plutonium-239. Godka plutonium waa qayb ka mid ah hubka halka fal-celinta nukliyeerka ay ka dhacdo, taasoo keenta in la sii daayo walxaha qarxa ee tamarta.
