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Rad Pro Calculator

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The Rad Pro Calculator is a valuable tool for professionals in the field of radiation safety and nuclear science. It simplifies the calculation of radiation doses from a point source, making it accessible for users who need to assess the safety and impact of radioactive sources in various environments. This calculator is designed to be user-friendly and is used extensively by health physicists, nuclear medicine professionals, and environmental health practitioners.

Understanding the Rad Pro Calculator

The Rad Pro Calculator operates based on a straightforward principle: it calculates the dose rate from a point source of radiation. This calculation is crucial in settings where it’s necessary to determine the potential exposure to individuals near a radioactive source.

Formula Explained

The formula used by the Rad Pro Calculator is:2D=r2S×A


  • D is the Dose rate (e.g., milliSieverts per hour, mSv/h)
  • S is the Source strength, given in terms of dose rate coefficient (e.g., mSv m²/h GBq)
  • A is the Activity of the source (in GigaBecquerels, GBq)
  • r is the Distance from the source (in meters, m)

Inputs and How to Use Them

  1. Source Strength (S): This indicates how much radiation is emitted per unit of activity per unit time per unit distance squared.
  2. Activity of Source (A): This is the total activity of the radioactive source in GBq.
  3. Distance (r): This is the distance from the source to the point at which the dose is being calculated.

By using these inputs, the calculator can provide accurate and valuable data regarding radiation exposure, which is essential for safety planning and risk assessment.

Step-by-Step Example

To illustrate how the Rad Pro Calculator works, consider a typical scenario:

Suppose we have a radioactive source with a strength of 0.5 mSv m²/h GBq, an activity of 2 GBq, and it is located 3 meters away from the point of interest. Here’s how to calculate the dose:

  1. Input the Source Strength (S) = 0.5 mSv m²/h GBq
  2. Input the Activity of Source (A) = 2 GBq
  3. Input the Distance from the Source (r) = 3 meters

Using the formula:

=0.5×232D=320.5×2​ =19D=91​ =0.111 /ℎD=0.111mSv/h

This result shows that the dose rate at a distance of 3 meters from the source is approximately 0.111 mSv/h.

Relevant Information Table

To provide a clearer understanding, here’s a table with typical values and their results:

Source Strength (mSv m²/h GBq)Activity (GBq)Distance (m)Calculated Dose (mSv/h)


The Rad Pro Calculator is an indispensable tool for those engaged in fields that require careful monitoring and calculation of radiation doses. It allows for precise, quick calculations that help in ensuring the safety and protection of personnel and the public from the potential hazards of radiation. By streamlining complex calculations into a few simple inputs, it ensures that critical decisions are supported by accurate data, enhancing safety measures and operational efficiency in radiation management.

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