This statement is not accurate. The amount of time a person can be exposed to a thermal heat flux without injury depends on various factors such as the intensity of the heat flux, the duration of the exposure, the person's proximity to the heat source, and the individual's physical characteristics.
A thermal heat flux of 10 kW/m2 is a very high level of heat radiation, and an unprotected person exposed to this type of heat for an extended period of time would be at risk of severe burns and other injuries. It is generally recommended that people avoid exposure to thermal heat fluxes above 5 kW/m2.
Therefore, it is important to take necessary precautions and protective measures to avoid prolonged exposure to high thermal heat fluxes, particularly those from fires.
If an unprotected person is exposed to a thermal heat flux of 10 kW/m2 from a fire for an extended period of time, on the order of minutes, the person would be expected to be uninjured.
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