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# Nuclear engineering FAQ

## 2011 Japan Nuclear Crisis

 What is a microsievert or millirem? by trottiey faq466-1709 Posted: 15 Mar 11 Microsieverts and millirems are units of radiation dose that measure biological effect on human tissue.microsieverts may be abbreviated to µSvmillirems may be abbreviated to mremThe conversion is100µSv = 10 mrem = 0.1 mSv = 0.01 remThere is no easy conversion between counts per minute and microsieverts because they measure different things.The worldwide average background dose for human beings subject to natural environments is 2400 µSv per year.An effective dose of 10,000 µSv carries with it a 0.056% chance of developing cancer or other health effect.For people who receive extremely high doses in short periods of time, (say, in excess of 500,000 µSv in a single day) there is an additional risk of acute radiation poisining. Back to Nuclear engineering FAQ Index Back to Nuclear engineering Forum

#### Resources

White Paper - Effects of AIA Quick Guide to UL 489 or UL 1077
The function of a circuit breaker is to provide overload (thermal) and short-circuit (magnetic) protection to a circuit and its downstream components. A circuit breaker functions like an airbag in a car, protecting circuit components and people by tripping the circuit to interrupt the current flow if it detects a fault condition in the control system. Download Now
White Paper - Guide to Integrate Large-Format Additive
As with any new technology, getting into large-format 3D printing begins with investigation. The first question may be a simple one: what does “large-format” mean? For 3D printers, “large” is a relative term. Many extrusion-based (FFF) 3D printers are referred to as desktop machines, because they fit on table space. Some of these have very respectable build volumes – but when it comes to “large-format,” the machines will need their own dedicated floor space. Large-format 3D printers have significant build volumes and are most often found in professional settings, like manufacturing facilities and R&D centers. Download Now

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