MicroSkyshine^®

 

MicroSkyshine^® calculates the photon dose from sky scattered gamma ray radiation.

MicroSkyshine^® has been used to evaluate conformance with 10CFR50, Appendix I ALARA requirements as well as 40CFR190 fuel cycle exposure criteria.

Typical application would be to determine scattering from BWR turbine buildings, radwaste storage facilities, and waste disposal sites.

MicroSkyshine’s^® analytical method of solution is based on the use of “beam functions” for a point source. This method was developed for NUREG/CR-0781 (May 1979), which resulted from an NRC sponsored effort. However, MicroSkyshine^® reflects the efforts of analysts at Kansas State University, who further improved the method.

MicroSkyshine’s^® Technical Features:

• A variety of silo and wall geometries. MicroSkyshine^® accepts dimensional data in meters, centimeters, feet, or inches.
• The scattering medium is air, and the Berger method is used for calculating buildup in an overhead shield. Any one of seven materials can be selected for this purpose.
• Library data for radionuclides, attenuation, and buildup are included.
• Source decay can be calculated and daughters generated.
• As many as twenty energy groups (with an energy range of 100 keV-10 MeV) may be created; total concentration entries are automatically converted to curies.
• All calculations performed by MicroSkyshine^® assume that the silo wall or vertical wall is a perfect shield; that is, radiation through the walls will not be calculated.

Geometries Included:

• Point Source Behind A Wall
• Horizontal Line Source Behind A Wall
• Horizontal Rectangular Area Source Behind A Wall
• Horizontal Circular Area Source Behind A Wall
• Vertical Line Source Behind A Wall
• Vertical Rectangular Area Source Behind A Wall
• Vertical Circular Area Source Behind A Wall
• Rectangular Volume Source Behind A Wall
• Vertical Cylindrical Volume Source Behind A Wall
• Horizontal Cylindrical Source Behind A Wall
• Point Source In A Rectangular Enclosure

MicroSkyshine^®Enhanced Software Features:

• Fully interactive input processing and input error checking.
• The main menu allows you to create, save, load, erase, and run many cases. You can change one data entry without having to pass through the entire input sequence.
• Batch Processing – Multiple cases can be run in Batch mode.
• Sensivity Runs – Several parameters can be examined to determine the resulting dose rate.
• Results can be saved in text, HTML, Microsoft Word^®, and Microsoft Excel^® formats.

Requirements:

• Microsoft Windows^® 10 or 11

Download the MicroSkyshine^® Product Description here (PDF),