Question

For either an LSA or SCO shipment, the external radiation level from the unshielded material can not exceed _____

A. 10 mSv/hr at 3 meters.
B. 100 mSv/hr at 3 centimeters.
C. 5 mSv/hr at 3 meters.
D. it is unlimited.

Answer 1

For either an LSA or SCO shipment, the external radiation level from the unshielded material cannot exceed 5 mSv/hr at 3 meters (C).

Step-by-step explanation:

The permissible external radiation level from unshielded material is a critical safety parameter for transporting radioactive substances. The specified limit is determined based on the potential health risks associated with radiation exposure. In this case, the correct limit is set at (C).5 mSv/hr at a distance of 3 meters.

Radiation exposure diminishes with distance from the source, following the inverse square law, which states that the intensity of radiation is inversely proportional to the square of the distance from the source. The formula for calculating the radiation intensity
`(\(I\))` is given by:

`\[I = (Q)/(4\pi r^2)\]`

Where:

`- \(I\)` is the intensity of radiation,

`- \(Q\)` is the quantity of radioactive material, and

`- \(r\)` is the distance from the source.

The specific requirement for an LSA or SCO shipment ensures that radiation levels are within safe limits for personnel involved in transportation and handling. Compliance with these standards is crucial for protecting individuals and the environment from the harmful effects of ionizing radiation.