Patent ID: 11887744
Assignee: HOLTEC INTERNATIONAL
Field: Machine tools (Mechanical engineering)
Classification: CPC B  G | IPC B  G

Claim 18:
19. A radioactive waste containment system comprising:
an upwardly canister having an interior chamber configured for holding radioactive waste and an open top;
a lower confinement lid detachably coupled to an upper shielded lifting lid which forms a self-supporting lid assembly which is liftable as a coupled unit;
an outer overpack defining a top annular rim circumscribing an upwardly open interior, the canister being removably inserted in the overpack;
the lid assembly positioned atop the overpack in which a peripheral portion of the shielded lifting lid abuttingly engages the annular rim of the overpack, and the confinement lid is configured so that it does not engage the annular rim of the overpack;
a plurality of assembly bolts which engage complementary threaded sockets in the confinement lid to threadably attach the shielded lifting lid to the confinement lid;
a plurality of confinement lid mounting bolts inserted through corresponding first bolt holes extending through the shielded lifting lid, the confinement lid mounting bolts threadably attaching the confinement lid to the canister without threadably engaging the shielded lifting lid;
wherein the confinement lid mounting bolts each have a head and a shank, the head of each confinement lid mounting bolt being positioned and recessed within the first bolt holes below a top surface of the shielded lifting lid; and
wherein the shielded lifting lid comprises a lifting lug configured for from grappling and hoisting the lid assembly, the confinement lid being liftable by lifting the shielded lifting lid.