U.S. Nuclear Regulatory Commission

Question 224: 10 CFR 20.1903 (a) gives exemptions to

posting "caution signs" under certain conditions. Since 10

CFR 20.1902 specifies "danger" signs, instead of caution

signs, (e.g., "grave danger, very high radiation area"), do

the exemptions in 10 CFR 20.1903 apply to these "danger"

areas as well?

Answer: No. The authorization to use only the term

"danger" (vice "caution") for a very high radiation area

provides emphasis to the potential hazards. There are no

exemptions in the code for posting a very high radiation

area. Since a high radiation area does not require using

the term "danger," the exemption would apply to this area

if the conditions of 10 CFR 20.1903 (a) are met.

(Reference: 10 CFR 20.1903, 10 CFR 20.1902)