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The term 'biological shield' is used for absorbing material placed around a nuclear reactor, or other source of radiation, to reduce the radiation to a level safe for humans. The shielding materials are concrete and lead shield which is 0.25 mm thick for secondary radiation and 0.5 mm thick for primary radiation [8]
A further threat to the shelter is the steel and concrete slab that formed the upper biological shield (UBS), situated above the reactor prior to the accident. [citation needed] This concrete slab was thrown upwards by the explosion in the reactor core and now rests at approximately 15° from vertical. The position of the upper bioshield is ...
The entire reactor assembly was placed in a large pressure vessel. Due to the size of the pile, only the reactor core itself was placed within the steel pressure assembly, which was then surrounded by a concrete confinement building (or biological shield). As there was no water in the core, and thus no possibility of a steam explosion, the ...
CBRN disposal technicians taking part in a training exercise. Chemical, biological, radiological, and nuclear defense (CBRN defense) or Nuclear, biological, and chemical protection (NBC protection) is a class of protective measures taken in situations where chemical, biological, radiological, or nuclear (including terrorism) hazards may be present.
A biosafety cabinet (BSC)—also called a biological safety cabinet or microbiological safety cabinet—is an enclosed, ventilated laboratory workspace for safely working with materials contaminated with (or potentially contaminated with) pathogens requiring a defined biosafety level.
The AOL Shield Pro browser provides protection with a whole host of advanced security features, so you can worry less about online threats. Shopping, banking, social media - AOL Shield Pro offers browsing protection for the things you do every day.
Blue Cross Blue Shield payments to about 6 million people are set to go out more than two years after the health insurer reached a $2.67 billion settlement with subscribers. Notices of payments to ...
The term biophoton used in this narrow sense should not be confused with the broader field of biophotonics, which studies the general interaction of light with biological systems. Biological tissues typically produce an observed radiant emittance in the visible and ultraviolet frequencies ranging from 10 −17 to 10 −23 W/cm 2 (approx 1-1000 ...