This Report addresses in considerable detail the consequences of
hot particles on and near the skin, in the eye, ear, respiratory system,
and gastrointestinal tract. Limits for exposures from hot particles are
recommended. If exposures are maintained below the recommended
limits, few, if any, deterministic biological effects are expected to be
observed, and those effects would be transient in nature. If effects
from a hot-particle exposure are observed, the result is an easily
treated medical condition involving an extraordinarily small stochastic
This report has been prepared as a result of a request to the
National Council on Radiation Protedion and Measurements (NCRP)
from the Nuclear Regulatory Commission (NRC). In recent years,
nuclear utilities have identified the potential for a limited number
of employees to come in contact with microscopic particles that are
radioactive. These particles have been given the generic name, independent
of their source and particular chemical and radioactive content,
of "hot particles."
Aluminium alloys have undergone a dramatic transformation in areas of extrusion, machining, welding, heat treatment, structural changes, created by ultra fine particles and enhanced corrosion resistance. Hence, these alloys have made rapid gains in European automotive and space industry. These developments have been described by experts in the book with new data and attractive graphics. The effect of processing parameters, including welding and deep rolling on their performance have been highlighted to alleviate the concerns of manufacturers and designers for new applications.
I've been watching this show lately with my 6-year-old son, Austin, who likes learning about space and planets and black holes and stuff. It's called How the Universe Works. And man, the universe has one hell of a story to tell. It all starts with, presumably, the Big Bang, wherein a single point in space barfs forth a hot, violent soup of particles and energy that take a few hundred million years just to cool down enough to begin coalescing into stars. You know... to "cool down" enough to become giant fucking balls of fire. Stars ignite. Star clusters form,...