If a person receives a dose of 60 mrems after 15 minutes in a radiation field, what is the dose rate?

If a person receives a dose of 60 mrems after 15 minutes in a radiation field, what is the dose rate?

• A. 120 mR/hr
• B. 180 mR/hr
• C. 240 mR/hr
• D. 300 mR/hr

Answer: (C)

To determine the dose rate, we need to calculate how much radiation a person is exposed to per hour based on the dose received over a specified period. In this scenario, a dose of 60 millirems (mrems) was recorded after 15 minutes. First, we convert the time from minutes to hours, since we want the dose rate in millirems per hour (mR/hr). There are 60 minutes in an hour, so 15 minutes is equal to 15/60 hours, which simplifies to 1/4 hour. Next, we can find the dose rate by using the formula: \[ \text{Dose Rate} = \frac{\text{Dose}}{\text{Time}} \] Substituting the values we have: \[ \text{Dose Rate} = \frac{60 \text{ mrems}}{1/4 \text{ hr}} = 60 \text{ mrems} \times 4 = 240 \text{ mR/hr} \] This calculation shows that the individual is receiving radiation at a rate of 240 millirems per hour. Thus, the correct dose rate is 240 mR/hr.

To determine the dose rate, we need to calculate how much radiation a person is exposed to per hour based on the dose received over a specified period. In this scenario, a dose of 60 millirems (mrems) was recorded after 15 minutes.

First, we convert the time from minutes to hours, since we want the dose rate in millirems per hour (mR/hr). There are 60 minutes in an hour, so 15 minutes is equal to 15/60 hours, which simplifies to 1/4 hour.

Next, we can find the dose rate by using the formula:

[

\text{Dose Rate} = \frac{\text{Dose}}{\text{Time}}

]

Substituting the values we have:

[

\text{Dose Rate} = \frac{60 \text{ mrems}}{1/4 \text{ hr}} = 60 \text{ mrems} \times 4 = 240 \text{ mR/hr}

]

This calculation shows that the individual is receiving radiation at a rate of 240 millirems per hour. Thus, the correct dose rate is 240 mR/hr.