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RSICC CODE PACKAGE CCC-644



1. NAME AND TITLE

HOTSPOT 2.05: Health Physics Code System for Evaluating Accidents Involving Radioactive Materials.



2. CONTRIBUTOR

Lawrence Livermore National Laboratory, Livermore, California.



3. CODING LANGUAGE AND COMPUTER

BASIC; Pentium (C00644/IBMPC/03).



4. NATURE OF PROBLEM SOLVED

The HOTSPOT Health Physics codes were created to provide Health Physics personnel with a fast, field-portable calculational tool for evaluating accidents involving radioactive materials. HOTSPOT codes are a first-order approximation of the radiation effects associated with the atmospheric release of radioactive materials. The developer's website is: http://www.llnl.gov/nhi/hotspot/.

Four general programs, PLUME, EXPLOSION, FIRE, and RESUSPENSION, calculate a downwind assessment following the release of radioactive material resulting from a continuous or puff release, explosive release, fuel fire, or an area contamination event. Other programs deal with the release of plutonium, uranium, and tritium to expedite an initial assessment of accidents involving nuclear weapons. Additional programs deal specifically with the release of plutonium, uranium, and tritium to expedite an initial assessment of accidents involving nuclear weapons. The FIDLER program can calibrate radiation survey instruments for ground survey measurements and initial screening of personnel for possible plutonium uptake in the lung.

The HOTSPOT codes are fast, portable, easy to use, and fully documented in electronic help files. HOTSPOT supports color high resolution monitors and printers for concentration plots and contours. The codes have been extensively used by the DOS community since 1985. Tables and graphical output can be directed to the computer screen, printer, or a disk file. The graphical output consists of dose and ground contamination as a function of plume centerline downwind distance, and radiation dose and ground contamination contours. Users have the option of displaying scenario text on the plots.



5. METHOD OF SOLUTION

HOTSPOT is a hybrid of the well-established Gaussian Plume Model, widely used for initial emergency assessment or safety analysis planning of a radionuclide release. Virtual source terms are used to model the initial atmospheric distribution of source material following a explosion, fire, resuspension, or user-input geometry.

The International Commission on Radiological Protection (ICRP) Publication 30 Respiratory Tract and ICRP 30 Part IV Systemic models are the basis for the Dose Conversion Factors (DCF). A one micrometer AMAD is assumed. ICRP 26/30 Tissue Weighting Factors are used for the 50-year Committed Effective Dose Equivalent DCF values. HOTSPOT supports both classic units (rem, rad, curie) and SI (Sv, Gy, Bq) units.

HOTSPOT incorporates Federal Guidance Reports 11, 12 and 13 (FGR-11, FGR-12, FGR-13) Dose Conversion Factors for inhalation, submersion, and ground shine. In addition to the inhalation 50-year Committed Effective Dose Equivalent DCFs, acute (24-hour) DCFs are available for estimating non-stochastic effects. This acute model can be used for estimating the immediate radiological impact associated with high acute radiation doses (applicable target organs are the lung, small intestine, wall, and red bone marrow). Users can add radionuclides and custom mixtures (up to 50 radionuclides per mixture).



6. RESTRICTIONS OR LIMITATIONS

These codes are designed for short-term (less than a few hours) release duration. Users requiring radiological release consequences for release scenarios over a longer time period are directed to such long-term models as CAP88-PC (RSICC package CCC-542). Users requiring more sophisticated modeling capabilities are directed to such capabilities as the LLNL National Atmospheric Release Advisory Center. NARAC is a real-time operational atmospheric hazard assessment system http://narac.llnl.gov/.



7. TYPICAL RUNNING TIME

The HOTSPOT code system is fast and interactive.



8. COMPUTER HARDWARE REQUIREMENTS

HOTSPOT runs on personal computers under Windows.



9. COMPUTER SOFTWARE REQUIREMENTS

HOTSPOT 2.05 is a full 32-bit Windows 95/98/00/XP/NT Application. The included executable was created with Microsoft Visual Basic 6.0 Professional. No source files are included in the package. RSICC tested this release under Windows 2000 and WindowsXP.



10. REFERENCES

a: Included documentation:

"Introduction to Hotspot Health Physics Codes" and "References" excerpts from S. G. Homann, Hot205.HLP electronic help files which are included in package (November 4, 2003).



b: Background information:

S. G. Homann, "HOTSPOT Health Physics Code for the PC," UCRL-MA-106315 (March 1994).



11. CONTENTS OF CODE PACKAGE

The executable, documentation (10.a), and data are transmitted on CD in a ZIP file. After expanding to disk, setup.exe must be run to install the Hot205.CAB file under Windows. NOTE: Source files are not included.



12. DATE OF ABSTRACT

November 1995, revised January 1996, May 1999, February 2004.



KEYWORDS: GAUSSIAN PLUME MODEL; RADIOACTIVITY RELEASE; REACTOR ACCIDENT; AIRBORNE; INTERNAL DOSE; RADIOLOGICAL SAFETY; NUCLIDE TRANSPORT; MICROCOMPUTER