Mostly free online or downloadable software in alphabetical order.

AcuteDose Code 1.2.  The AcuteDose code computes age-specific absorbed dose coefficients for user specified commitment periods (integration times post an acute intake) and radionuclides for inhalation and ingestion intakes of radionuclides. The upper limits for the integrals are read from \DATA\AcutDose.INI.  The absorbed dose rate files were archived on the FGR-13 CD (Contact EPA for CD).  The user selects,

  1. either the ingestion or inhalation data set,
  2. the age(s) of interest and
  3. the organ(s) to be processed.

To select multiple ages or organs mark the desired items by holding down and clicking the left mouse button. When prompted, the user should enter the radioisotope of interest.

Program can be installed and run from a flash drive (USB).  November  2012.

Download from EPA

CAP88-PC.  EPA has approved the use of CAP88-PC for demonstrating compliance with 40 CFR 61.93 (a), NESHAPs subpart H. Emissions of Radionuclides Other than Radon from Department of Energy Facilities.

New Version 4.0 available.

Convert 4.10.  Unit conversions.  No HP units, but a good tool nevertheless.

Download Convert 4.10 zip file.

COMPASS.   The COMPASS software is designed to facilitate the use of MARSSIM and guides the user into making informed decisions in designing final status radiological surveys.

Download COMPASS Version 1.0

Download COMPASS Version 1.1

COMPLY 1.7.1.  A computerized screening tool for evaluating radiation exposure from atmospheric releases of radionuclides.  May be used for demonstrating compliance with some EPA and Nuclear Regulatory Commission regulations, including the National Emission Standards for Hazardous Air Pollutants (NESHAPS) in 40 CFR Part 61, Subpart H and Subpart I.

User Guide

Download from EPA

CPAK 3.02. The software and data package DCFPAK (Dose Coefficient File Package) allows electronic access to nuclear decay data and dose and risk coefficients for exposure to radionuclides. DCFPAK has been built in a series of versions designed to allow access to expanded capabilities as they are completed. Eight versions of DCFPAK were built from 1996 through 2008. The most recently released version is DCFPAK 2.2 (2008). The present version, called DCPAK 3.02, improves DCFPAK 2.2 mainly by expanding the set of radionuclides addressed in the inhalation and ingestion scenarios.   Program can be installed and run from a flash drive (USB).  2008.

Download from EPA

User Guide.

EPA Remediation Goals

Preliminary Remediation Goals (PRG). Soil cleanup levels based on theoretical 1E-6 risk level.

OSWER 9355.01-83A.  Distribution of OSWER Radionuclide Preliminary Remediation Goals (PRGs) for Superfund Electronic Calculator.

PRG Home
PRG Calculator

Dose Compliance Concentrations (DCC). Soil cleanup levels based on 1 mrem/y dose level.

OSWER 9355.0-86A.  Distribution of OSWER Radionuclide ARAR Dose Compliance Concentrations (DCCs) for Superfund Electronic Calculator.

DCC Home
DCC Calculator

Buiding Preliminary Remediation Goals (BPRG). Interior building cleanup goals based on theoretical 1E-6 risk level.

Building Dose Compliance Concentrations (BDCC). Interior building cleanup goals based on 1 mrem/y dose level.

Surface Preliminary Remediation Goals (SPRG). Exterior hard surface cleanup goals based on theoretical 1E-6 risk level.

Surface Dose Compliance Concentrations (SDCC). Exterior hard surface cleanup goals based on 1 mrem/y dose level.

DandD.   Decontamination and Decommissioning (DandD) software package, developed by NRC, assesses compliance with the dose criteria of 10 CFR Part 20, Subpart E. Specifically, DandD embodies NRC's guidance on screening dose assessments to allow licensee s to perform simple estimates of the annual dose from residual radioactivity in soils and on building surfaces. For a screening assessment with DandD, NRC has predefined conceptual models for the scenarios along with default parameter distributions (based on NUREG/CR–5512, Volumes 1 and 3).

Register to download DandD

DCAL. The system consists of a series of computational modules driven by a user interface.  DCAL may be used either in an interactive mode designed for evaluation of a specified exposure case or in a batch mode that allows non-interactive, multiple-case calculations.  DCAL is intended for experienced users with knowledge of computational dosimetry.  August 2006.

Download from EPA

User Guide.  EPA source

DCAL (Dose & Risk Calculation).  DCAL is a comprehensive software system for the calculation of tissue dose and subsequent health risk from intakes of radionuclides or exposure to radionuclides present in environmental media. The system includes extensive libraries of biokinetic and dosimetric data and models representing the current state of the art. DCAL maybe used either in an interactive mode or in a batch mode and is intended for experienced users with knowledge of computational dosimetry.

Download DCAL

Decay Chain Activity Projection Tool.  On-line ORNL calculator.  The activities of chain members are solved by a hybrid forward-euler differential equation algorithm published by Leggett et. al.  This numerical integration method was used in conjunction with the ICRP 107 decay database, where the progeny, branching ratios, and half-lives for each radionuclide (excluding stable isotopes) are specified.  The Bateman series is a set of linear, first order differential equations.  However, while the solution can be written explicitly for short chains with little effort, the closed form solution is unwieldy for longer chains.  It represents the abundances and activities of radionuclides in a decay chain as a function of time.  In some chains computational errors arise due to numerical instabilities associated with pairs of similar decay constants.  For this reason, numerical integration is often a more practical approach for estimating chain member activities.

Depleted Uranium Fraction Calculator.  Online calculation of the depleted uranium fraction in a sample containing a mix of natural and depleted uranium ratios.  WISE Uranium Project.

Hotspot Health Physics Codes.  Hotspot provides a fast means for estimation the radiation effects associated with the short-term (less than 24 hours) atmospheric release of radioactive materials.  Scenarios include nuclear weapons, "dirty bombs" or any airborne dispersion incident.  Developed by the Lawrence Livermore National Laboratory (LLNL).

User Guide

Register to download Hotspot 3.0 from LLNL.

Interactive RadioEpidemiological Program (IREP)

NIOSH-IREP, Version 5.8. NIOSH-IREP was created for use by the Department of Labor for adjudication of claims in accordance with the Energy Employees' Occupational Illness Compensation Program Act of 2000 (EEOICPA). NIOSH-IREP was adapted from the National Institutes of Health's (NIH) Interactive RadioEpidemiological Program (IREP) developed by the National Cancer Institute (NCI) to update the NIH Radioepidemiological Tables of 1985. (The version of IREP developed by NCI is known as NIH-IREP. See below).  General background information on NIOSH-IREP.

NIH-IREP, Version 5.6.1. The Interactive RadioEpidemiological Program (IREP) was developed as part of the effort to update the 1985 Radioepidemiological Tables report. The 1985 report was mandated by the 1983 "Orphan Drug Act" (PL 97-414) which instructs to "devise and publish radioepidemiological tables that estimate the likelihood that persons who have or have had any of the radiation-related cancers and who have received specific doses prior to the onset of such disease developed cancer as a result of these doses." NIH-IREP contains a collection of risk coefficients for cancer incidence obtained mainly from the Japanese A-bomb survivors study, but also from other epidemiological studies. The risk coefficients are adjusted for random and systematic errors in the A-bomb survivors dosimetry, and they are adapted for the U.S. population. Appropriate adjustments of the coefficients are made for low dose and low dose-rate exposure situations. The uncertainties in every component are fully expressed and propagated.

MARSSIMPower2000.  This software implements the final status survey designs described in the MARSSIM manual. Courtesy Carl Gogolak.

Download MARSSIMPower2000

MicroShield. MicroShield® is a comprehensive photon/gamma ray shielding and dose assessment program that is widely used for designing shields, estimating source strength from radiation measurements, minimizing exposure to people, and teaching shielding principles. MicroShield is commercial software sold by Grove Software Inc.

MicroSkyShine. MicroSkyshine® calculates the photon dose from sky scattered gamma ray radiation.  MicroSkyshine is commercial software sold by Grove Software Inc.

Neutron Activation Calculator.  Online search for radioactive activation products of elements and nuclides exposed to neutron radiation.  WISE Uranium Project.

Nuclide Decay.  Nuclide Decay is a free, standalone software package to solve the N-dimensional Bateman system of equations for radioactive decay.  Using the software, the activity or number of atoms of a radioactive isotope and its decay progeny can be calculated as a function of time.  Environmental Remediation Group.

Neutron Activation and Scatteering Calculators - NIST.

These calculators use neutron cross sections to compute activation on the sample given the mass in the sample and the time in the beam, or to preform scattering calculations for the neutrons which are not absorbed by the sample.

  No truncation
Calculator.  Reports only > 1nCi.
Calculator.  Alternate input data.

ProbPlot 3.0.  Plots empirical data on cumulative probability distribution graphs.  Cumputes parametric statistics and a "test statistic" based on "sampling by variables."  Useful for visual presentation of characterization and final status surveys for buildings and land.  

Programmed by Bob Tuttle, Brian Oliver and Ray McGinnis.

Download and install ProbPlot Version 3.0.

ProUCL. ProUCL version 5.1.002 (5.1) is the latest update of the ProUCL statistical software package for analysis of environmental data sets with and without nondetect (ND) observations. ProUCL version 5.1 is a comprehensive statistical software package with statistical methods and graphical tools to address many environmental sampling and statistical issues.  ProUCL Factsheet.

Download version 5.1
Download version 4.1

Radar Software.  Variety of free and commercial nuclear medicine software.

Online Medical Dose Calculator.  This form gives radiation dose estimates for certain radiographic and nuclear medicine procedures, based on literature reported values. Individual organ doses and total body effective doses are given for these specified examinations, and some combinations of examinations. In addition, a short statement is generated, which may be useful as part of a patient consent form document, explaining the radiation doses as numerical values and as equivalent days of exposure to natural background radiation.

MIRDOSE and OLINDA/EXM.  The MIRDOSE software has been popular for a number of years for calculating internal radiation dose estimates for radionuclides used in nuclear medicine.  The program has phantom libraries which permit the calculation of these doses for individuals of different age and size and for women at different stages of pregnancy.  The code OLINDA/EXM, which is an acronym standing for Organ Level INternal Dose Assessment/EXponential Modeling, was designed as an update to MIRDOSE. 

Visual Monte Carlo (VMC).  VMC is a computer program that simulates the irradiation of the human body by external sources. It uses a voxel phantom produced at Yale University and the Monte Carlo technique to simulate the emission of photons by a point, ground, cloud source or X ray source.  It then transports the photons through the human body phantom and calculates the dose to each body region.

VARSKIN.  VARSKIN Mod 2 calculates the radiation dose (gamma and beta) to skin from radioactive contamination of skin or protective clothing. 

Dynamic Bladder Model (MIRD Pamphlet 14).  The MIRD Committee developed an analysis of how urinary bladder dose changes for a number of radiopharmaceuticals as a function of initial bladder volume, urine flow rates, and bladder voiding schedule. 

Virtual Cell (VC) Radiobiogy.  VC is a code that incorporates a multiscale system of models to simulate early events and processes involved in the pathogenesis and treatment of cancer.  The main biological endpoints of interest in the VC are cell death and neoplastic transformation.  The VC also provides information about the formation and repair of DNA damage and some information about chromosome aberration yields, the induction of genomic instability, cell cycle kinetics, and the probability of tumor eradication following radiation therapy.

Radcalc 4.1.1.  Radcalc is a shareware software program that has applications in the transportation and packaging of high- and low-level radioactive waste.

Note that Radcalc 4.1 is no longer supported by DOE.
Suspension of Radcalc 4.1

For a copy of Radcalc 4.1.1, contact:

For additional information contact:
Ashok Kapoor, Program Manager
+1 (202)586-8307

Note that Radcalc appears to be no longer supported.  Above links and email addresses are dead and efforts to communicate with DOE have failed.

Radiation Decay Version 4.0.  Radiation Decay provides radioactive decay information for many radionuclides. Data provided include the half life, radioactive daughter nuclides, decay chain series, probabilities per decay, and decay product energies for alphas, betas, positrons, electrons, X-rays, and photons. A search for nuclide by energy range is also included.

Download Radiation Decay from Software Informer

Radiation Dose to Risk Convertor.  Online calculation of theoretical health risk associated with a radiation dose.  WISE Uranium Project.

Radioactive Decay and Ingrowth.  Solution of the two-nuclide decay/ingrowth equations.  Downloadable Excel spreadsheet.

Radioactivity Calculator.  Online calculator from GraphPad Software.  Isotope decay, concentration of stock, dilution of stock, specific activity, Solution of the two-nuclide decay/ingrowth equations.

Radioactivity Unit Converter.  Online conversion of a wide range of units, including many radiation units.  WISE Uranium Project.

Radiological Toolbox 3.0.0. The Radiological Toolbox (a.k.a. Rad Toolbox) provides ready access to data of interest in radiation safety and protection of workers and members of the public. The data include dose coefficients for intakes of radionuclides, external exposure to radionuclides distributed in environments, and for exposures to photon and neutron radiation fields. Other supportive data include interaction constants and coefficients for alpha, beta (i.e., electron), gamma (i.e., photon or x-ray) and neutron radiations, nuclear transformation data, biological, radiological and physiological data, and supplemental information on various related topics.  K. F. Eckerman and A. L. Sjoreen (ORNL) and C. Sun (USNRC). April 2013.

User Guide

Register and download Radiological Toolbox

Radon Individual Dose Calculator.  Online calculation of the radiation dose rate, dose, and health risk for an individual exposed to a known concentration of radon and its decay products.  WISE Uranium Project.

Rad Pro Calculator.  Programmed by Ray McGinnis.  New and improved downloadable and on-line versions available.

On-line Version

Downloadable PC Desktop Version

Downloadable PDA Version for Pocket PC and Windows Smartphones

Rad Pro Calculator online performs many nuclear calculations that are useful to the health physicist, radiological researcher, radiochemist, radiation safety officer, health physics technician (HP) and nuclear medicine professional. It calculates, among other things, radiation safety units conversions (SI and US customary) and gamma emitter dose rate and activity.  Other calculations include:

       1)  Gamma shielding equations (with or without buildup)
       2)  Beta emitter dose rate and activity
       3)  Dose-rates for x-ray machines and devices
       4)  Grams of plutonium (Pu) and uranium (U) from activity
       5)  Decay and half life equations
       6)  Bremsstrahlung x-ray calculations for beta interactions
       7)  Uranium fuel loading ratios
       8)  Uranium enrichment from U-234 and U-238 lab data
       9)  Inverse Square Law calculations for electromagnetic energies
      10)  Minimum detectable concentration and contamination (MDC)
      11) ALARA calculations for dose and job planning 

RAMP. U.S. Nuclear Regulatory Commission's radiation protection and dose assessment computer codes.

RASCAL. Dose and consequence projections following radiological incidents.

Turbo FRMAC. Evaluates hazards from radiological incidents.

GENII. Calculates radiation dose and risk from radionuclides released to the environment.

MILDOS. Calculates dose commitments to individuals and population in an 80-km radius of an operating uranium recovery faility.

DandD. Assesses compliance with 10 CFR 20 Subpart E for soils and building surfaces.

SNAP/RADTRAD. Symbolic integration of engineering analysis and operational and DBA off-site dose assessment.

HABIT. LWR control room habitability following toxic and radionuclide releases.

GALE. Gaseous and liquid effluents from PWRs and BWRs.

RADTRAN. Risk and consequence analysis of radioative material transportation.

NRCDose. Offsite doses from liquid and gaseous effluents during routine operation.

VARSKIN. Occcupational dose to the skin from hot particles or contamination.

Radiological Toolbox. Access to data of interest in radiation safety and proyection of workers snd members of the public.

PIMAL. GUI for conducting MCNP dosimetry assessments using a user-defined phantom.

PAVAN. Relative ground level air concentrations (X/Q) for assessment radionuclide releases

ARCON. Calculates atmocpheric relative concentrations (X/Q) in support of control room habitability assessments.

RESRAD Family of Codes.  RESRAD, an DOE-developed code used for the calculation of dose from all pathways from radioactively contaminated sites.  Developed by Argonne National Laboratory.

RESRAD 7.0 - Onsite residential, industrial or wilderness exposure scenarios for contaminated soils.
RESRAD-Build 3.5 - Occupancy exposure scenario for contaminated building.
RESRAD-Offsite 3.1 - Offsite exposures from airborne and groundwater pathways.
RESRAD-Biota 1.5 - Risk to aquatic and terrestrial biota.
RESRAD-RDD 1.7 - Radiological Dispersion Device.

RESRAD-Baseline - Follows EPA's guidance on risk assessment for superfund (RAGS). No longer updated
RESRAD-Recycle 3.10 - Exposure scenarios for recycled materials and equipment. No longer updated
RESRAD-CHEM - No longer updated
RESRAD-ECORISK - No longer updated

Download all elements.

RiskTab 2.2.1.  RiskTab_Full_setup.exe installs the application RiskTab, its associated data files, and places the RiskTab icon on the desktop. The default folder for the installation is \RiskTab however you can select or define a different folder. Accept the defaults on any remaining questions during the installation. The installation will end with the option of displaying this file. RiskTab can be invoked by clicking its icon on the desktop. To remove RiskTab from the computer click the executable UNINS000.EXE in the in the folder to which RiskTab was installed.

RiskTab tabulates the lifetime risk per unit intake by inhalation or ingestion for a user specific radionuclide and period of chronic intake. The tabulations are derived from risk as a function of age files archived on the FGR 13 CD (Contact EPA for CD). The CD files have been converted to direct access files to facilitate RiskTab access to the data for the user specified radionuclide. Age and gender specific intakes for the intake period are calculated assuming a uniform concentration of the radionuclide in air and water (and in the diet). The risk coefficients for the intake are per Bq inhaled or ingested over the exposure period.  November 2012.

Program can be installed and run from a flash drive (USB).

Download from EPA

Scanning MDC Calculator.  This on-line utility calculates scan MDCs for select contaminant radionuclides in soil for 1-second scaler counts with NaI detectors based on probabilistic MCNPX modeling of detection efficiency along with related modifications to the MARSSIM method (see resource links below for supporting technical information).  Environmental Restoration Group.

Probabilistic Scan MDC White Paper  

Spatial Analysis and Decision Assistance (SADA).  SADA is free software that incorporates tools from environmental assessment fields into an effective problem solving environment. These tools include integrated modules for visualization, geospatial analysis, statistical analysis, human health risk assessment, ecological risk assessment, cost/benefit analysis, sampling design, and decision analysis. The capabilities of SADA can be used independently or collectively to address site specific concerns when characterizing a contaminated site, assessing risk, determining the location of future samples, and when designing remedial action. Courtesy University of Tennessee.

Download version 5.0.78

Specific Activity.  MS Excel spreadsheet model converts mass to activity and vice versa. Calculates specific activity for pure radioisotopes and elements with <100% abundance. Calculates specific activity for chemical compounds.


Uranium Enrichment Calculator Online.  Calculates uranium enrichment from lab results for U-234 and U-238. Calculates U-234, U-235 and U-238 masses and activities for any enrichment.  Programmed by Ray McGinnis.  Also a part of Rad Pro Calculator Desktop.

Universal Decay Calculator.  Online calculation of radioactive decay of 497 nuclides, including ingrowth and decay of their progeny.  WISE Uranium Project.

Uranium Decay Calculator.  Online calculation of radioactive decay and ingrowth of uranium and its decay products for a variety of nuclide mixes found in the nuclear fuel industry. Covers the natural U-238 and U-235 series, and the artificial U-236 and U-232 series.  WISE Uranium Project.

Uranium in Soil and Building Material Individual Dose Calculator.  Online calculation of the radiation dose and risk for an individual living on soil contaminated from uranium and/or in a home built from such contaminated material (residential exposure scenario).  WISE Uranium Project

Uranium Radiation Individual Dose Calculator.  Online determination of the radiation dose for an individual that is exposed to a known amount of uranium and/or its decay products. For a variety of nuclide mixes found in the nuclear fuel industry, this calculator covers ingestion, inhalation, external exposure from contaminated soil, and external exposure from a point source. Calculations can not only be performed for actual exposure situations, but also for future scenarios, taking decay and ingrowth of decay products into account.  WISE Uranium Project

Uranium Radiation Organ Dose Calculator.  Online calculation of radiation organ doses according to ICRP 72 for a member of the public, and determination of theoretical risk of contracting a certain type of cancer.  WISE Uranium Project

Uranium Radiation Safety Toolkit v 2.0.  This toolkit contains programs to model radiation safety aspects of uranium mining and processing. Originally, it was called the "Radon Toolkit" and only contained programs to calculate radon source terms for various situations and model the behavior of radon and its progeny in various scenarios. Since then, tools for gamma radiation and long-lived radioactive dust have been included.  Environmental Instruments of Canada Inc.

VARSKIN. The VARSKIN computer code is used by NRC, Agreement States, licensees, vendors and International Partners to calculate radiation dose to the skin resulting from exposure to radiation emitted from hot particles or other contamination on or near the skin. These dose assessments are required by 10 CFR 20.1201(c) in which the assigned shallow dose equivalent is to the part of the body receiving the highest exposure over a contiguous 10 cm 2 of skin at a tissue depth of tissue depth of 0.007 centimeters (7 mg/cm2).

Register and download VARSKIN 5.2 (Cost for commercial companies, free for government agencies and universities)

Visual Sample Plan (VSP).  VSP provides statistical solutions to sampling design, world-class mathematical and statistical algorithms, and a user-friendly visual interface, while answering two important questions in sample planning ... how many samples to take and where to take them?

Download VSP 7.3

WISE Uranium Project.