Bonded carbon or ceramic fiber composite filter vent for radioactive waste
AssigneeGilbert W. Brassell
InventorsGilbert W. Brassell, Ronald P. Brugger
Life of this patent
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Abstract
Carbon bonded carbon fiber composites as well as ceramic or carbon bonded ceramic fiber composites are very useful as filters which can separate particulate matter from gas streams entraining the same. These filters have particular application to the filtering of radioactive particles, e.g., they can act as vents for containers of radioactive waste material.
Claims18
A closed but safely vented, walled area comprising,
- at least one wall defining a closed area, all walls being substantially impermeable to both gases and particulate matter, and the closed area containing radioactive particulate material, and
- located in a wall thereof, a filter consisting essentially of a carbon bonded carbon fiber composite, ceramic bonded ceramic fiber composite or a carbon bonded ceramic fiber composite, said filter being permeable to gaseous species and retaining radioactive particles of a diameter of 0.3 .mu.m with an efficiency of 99.97%.
A method of safely venting a container of radioactive particulate material, comprising incorporating in a wall thereof a filter consisting essentially of a carbon bonded carbon fiber composite, a ceramic bonded ceramic fiber composite or a carbon bonded ceramic fiber composite, said filter being permeable to gaseous species and retaining radioactive particles of a diameter of 0.3 .mu.m with an efficiency of 99.97%.
A method of separating radioactive particulate matter from gaseous species in which it is entrained comprising, contacting a mixture of the gaseous species and the radioactive particulate matter with a filter consisting essentially of a carbon bonded carbon fiber composite, a ceramic bonded ceramic fiber composite or a carbon bonded ceramic fiber composite, said filter being permeable to gaseous species and retaining radioactive particles of a diameter of 0.3 .mu.m with an efficiency of 99.97%.
Dependencies are inferred from the claim text.