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On September 11, 1957, a plutonium fire occurred in one of the gloveboxes used to handle radioactive materials, igniting the combustible rubber gloves and plexiglas windows of the box. Metallic plutonium is a fire hazard and pyrophoric; under the right conditions it may ignite in air at room temperature. The fire escaped containment in under ...
HEPA filter banks meant to remove microscopic particles of plutonium from the glove box exhaust streams were destroyed by the fire, allowing radioactive smoke to escape the building. On the evening of September 11, 1957, plutonium shavings in a glove box in building 771, the Plutonium Recovery and Fabrication Facility, spontaneously ignited ...
Dec. 19—A sealed compartment with safety gloves attached caught fire at Los Alamos National Laboratory in November, resulting in officials shutting down a portion of the site's plutonium ...
Inspection of the gloves would yield no evidence of external leakage of radioactive contaminant from the glovebox, despite the fact that plutonium had been found on those surfaces of the gloves that had contact with Silkwood's hands, and no other source for a plutonium leak could be ascertained despite thorough inspections of the air vents and ...
A fire alarm box, fire alarm call box, or fire alarm pull box is a device used for notifying a fire department of a fire or a fire alarm activation. Typically installed on street corners or on the outside of commercial buildings in urban areas, they were the main means of summoning firefighters before the general availability of telephones.
Concrete walls 10 inches (250 mm) thick permitted as much as 20% plutonium-240 and 10% plutonium-241 content to be handled. Glove box shielding allowed for 12% plutonium-240 and 3.2% plutonium-241. Four main glove boxes were located on the first two floors with access to dissolver pots, hot plates, condensers and furnaces.
Diagram of a radioisotope heater unit. A radioisotope heater unit (RHU) is a small device that provides heat through radioactive decay. [1] They are similar to tiny radioisotope thermoelectric generators (RTG) and normally provide about one watt of heat each, derived from the decay of a few grams of plutonium-238—although other radioactive isotopes could be used.
The alarm transmission methods covered under UL 365 can be categorized under standard line security or encrypted line security. The systems are required to operate within the limits of Class 2 remote control and signal circuits as defined by the National Electrical Code, NFPA 70. [15]