The Radiological 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.

PAVAN is a computer code used to estimate relative ground-level air concentrations (X/Q) for the assessment of potential accidental releases of radioactive material from nuclear facilities. These assessments are required by 10 CFR Part 50 and 10 CFR Part 100. PAVAN uses joint frequency distributions of wind direction and wind speed by atmospheric stability to estimate relative air concentration values for specific averaging time periods at specified distances.

NRCDose is a user-friendly graphical user interface (GUI) for the LADTAP Il, GASPAR II, and XOQDOQ programs which operate under all Microsoft Windows™ platforms. These Fortran codes implement NRC’s current requirements for As Low As Reasonably Achievable (ALARA) for radioactive effluents from nuclear power plants. NRCDose allows the user to enter and retrieve data through a series of windows dialogs, making the use of the program much more user-friendly and efficient than its original design.

HABIT v2.2 is a suite of computer codes to assist in evaluating Light-Water Reactor (LWR) control room habitability in the event of accidental spills of toxic chemicals. It produces files containing tabular output that can be printed, viewed, or imported into spreadsheet programs for further uses.

HABIT v2.2 also uses a heavy-gas dispersion model, unifies the input screen of EXTRAN, DEGADIS, and SLAB, and incorporates Bitter Mc-Quaid calculation to determine which model needs to run and plot the concentration versus time outputs.

ARCON is a computer code used to calculate atmospheric relative concentrations (X/Q) in support of control room habitability assessments required by 10 CFR Part 50, Appendix A, General Design Criterion 19. It uses hourly meteorological data and the atmosphere’s influence (i.e., dilution and dispersion) in the vicinity of buildings to calculate the relative concentration at control room air intakes. These concentrations would be exceeded no more than five percent of the time and calculated for averaging periods ranging from one hour to 30 days in duration.