Source: Radiation Safety Associaties, Inc.
RADCALC is not just a health physics tool—it's an entire HP TOOL BOX, designed to make your job easier
RADCALC is not just a health physics tool—it's an entire HP TOOL BOX, designed to make your job easier and your project calculations quick, reliable, and painless!

  • is a utility program designed to performs health physics calculations
  • contains a searchable database of radioactive isotopes and associated emissions
  • performs unit conversions for both radiological and non-radiological units

    With RadCalc 1.1, you can

  • Perform statistical calculations for measurements of radioactive surface contamination, wipe samples, and air samples, including minimum detectable activity (MDA), lower limit of detection (LLD), detection limit (LD ), and critical level (LC), as well as sample activity.
  • Specify a rate-meter instrument or detector from a drop-down menu to make rate-meter-based statistical calculations even easier.
  • Specify input and results in any mix of US or SI units of count rate, activity, and area; all unit conversions are handled automatically. Click on "Use MARSSIM Method" to force all statistical calculations to follow the guidance in the MARSSIM Manual (NUREG-1575). Turn this feature off to use the traditional Currie methodology, specifying a particular confidence-level.
  • Calculate half-life and elapsed time in addition to the usual decayed activity. "Back calculating" activity is also supported, and special features are included to support decay-in-storage programs.
  • Search and display a full database of 497 radioactive isotopes, emissions and intensities, half-life, daughters, branching ratios, and potential parent isotopes, all on a single screen. The database can be searched for nuclides giving specific emissions by energy and yield.
  • Conveniently convert between units of radiation, radiation rate, radioactivity, total radioactivity, specific activity, length, area, volume, temperature, and more.
    Results and data in all sections of RadCalc can be printed or saved as a text file for use in other applications, and the number of significant figures displayed can be adjusted by the user.

    Radiation Safety Associaties, Inc., 19 Pendleton Dr., P.O. Box 107, Hebron, CT 06248. Tel: 860-228-0487; Fax: 860-228-4402.