Multiple lead seal assembly for a liquid-metal-cooled fast-breeder nuclear reactor
US4012282A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | May 17, 1976 |
| Grant date | Mar 15, 1977 |
| Priority date | — |
| Expiry date | May 17, 1996 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG21C17/116
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
A reusable multiple lead seal assembly provides leak-free passage of stainless-steel-clad instrument leads through the cover on the primary tank of a liquid-metal-cooled fast-breeder nuclear reactor. The seal isolates radioactive argon cover gas and sodium vapor within the primary tank from the exterior atmosphere and permits reuse of the assembly and the stainless-steel-clad instrument leads. Leads are placed in flutes in a seal body, and a seal shell is then placed around the seal body. Circumferential channels in the body and inner surface of the shell are contiguous and together form a conduit which intersects each of the flutes, placing them in communication with a port through the wall of the seal shell. Liquid silicone rubber sealant is injected into the flutes through the port and conduit; the sealant fills the space in the flutes not occupied by the leads themselves and dries to a rubbery hardness. A nut, threaded onto a portion of the seal body not covered by the seal shell, jacks the body out of the shell and shears the sealant without damage to the body, shell, or leads. The leads may then be removed from the body. The sheared sealant is cleaned from the body, leads, an…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.