Legendofdeep said:
Around how many Sv would a nuclear engineer receive annually? How fatal would it be?
The exposure would depend on the work one does. If one worked in a corporate office, it would be the same as anyone in most offices doing other jobs.
If one worked at a nuclear power plant, it would still be quite low, but maybe slightly higher than the person working in an office in the middle of a typical city.
There is a caveat to that: Some buildings may use construction materials, such as granites, which may contain naturally occurring radionuclides. People working very close to such materials would receive a slightly higher does (perhaps a few times normal background).
If one flies in aircraft a lot, the annual exposure to radiation (natural cosmic radiation) would be higher than someone who didn't fly.
If one works in a uranium mine, one's annual exposure would be higher than that of the general public - but it depends on how much time is spent in the mine, on the level of protection, and on the source strength.
Similarly, if one worked on spent fuel at a power plant or a reprocessing facility, one might get more exposure than the average person.
Another caveat: The industry imposes limits on exposure of people working with radiation or radioactive materials.
See - Subpart C--Occupational Dose Limits
Source: 56 FR 23396, May 21, 1991, unless otherwise noted.
§ 20.1201 Occupational dose limits for adults.
http://www.nrc.gov/reading-rm/doc-collections/cfr/part020/part020-1201.html
or more generally
PART 20--STANDARDS FOR PROTECTION AGAINST RADIATION
http://www.nrc.gov/reading-rm/doc-collections/cfr/part020/