Radiation levels outside a room are such that an individual could receive 0.30 rem in 1 hour.According to the Nuclear Regulatory Commission (NRC), the technologist should

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NRC regulation 10 CFR 20.1902, posting requirements, states: "Posting of high radiation areas.The licensee shall post each high radiation area with a conspicuous sign or signs bearing the radiation symbol and the words 'CAUTION, HIGH RADIATION AREA' or 'DANGER, HIGH RADIATION AREA'." High radiation area means an area, accessible to individuals, in which radiation levels from radiation sources external to the body could result in an individual receiving a dose in excess of 0.1 rem (1 mSv) in 1 hour at 30 centimeters from the radiation source or 30 centimeters from any surface that the radiation penetrates.

Radiation Levels Outside a Room Are Such That an Individual