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Radioactive Material Equations and Formulas Calculator
Hazardous Waste Treatment
Solving for Radionuclide Mass
note: Avogadro's number = N0 = 6.02 x 1023 atoms/gram-atom
Inputs:
Conversions:
| source strength or total radioactivity (Q) | = | 0 | = | 0 | becquerel | |
| radionuclide atomic weight (W) | = | 0 | = | 0 | gram/gram-atom | |
| disintegration constant (KT) | = | 0 | = | 0 | second^-1 |
Solution:
| radionuclide mass (M) | = | HAS NOT BEEN CALCULATED |
Other Units:
Change Equation
Select an equation to solve for a different unknown
radioactive material and nuclear waste decay
 |
solve for number of nuclei remaining after time period |
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solve for initial number of nuclei |
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solve for disintegration constant |
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solve for time period |
half life
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solve for half life time |
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solve for disintegration constant |
source strength
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solve for becquerels |
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solve for radionuclide atomic weight |
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solve for radionuclide mass |
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solve for disintegration constant, inverse time |
quality factor
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equivalent dose - measures the amount of effective biological damage caused by radiation |
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absorbed dose - measure of the amount of energy absorbed into material |
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solve for quality factor |
unit conversion factors
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equivalent dose - SI unit is rem (roentgen equivalent man) - US unit is sievert |
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absorbed dose - SI unit is rad - US unit is gray |
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total radioactivity - SI unit is becquerel - US unit is curie |
Where
| N | = | number of nuclei remaining after a time period |
| N0 | = | initial number of nuclei |
| Kb and KT | = | disintegration constant |
| t1/2 | = | half life time of radionuclide |
| Q | = | total radioactivity or source strength |
| N0 | = | Avogadro's number, 6.02 x 1023 atom/gram-atom |
| W | = | atomic weight |
References - Books:
1) P. Aarne Vesilind, J. Jeffrey Peirce and Ruth F. Weiner. 1994. Environmental Engineering. Butterworth Heinemann. 3rd ed.
AJ Design - Online Science Mathematics Engineering Software Programs | 2 | 3 | 4 | 5
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