1. Conversion Editor U.S. Nuclear Regulatory Commission Rockville, Maryland Pacific Northwest National Laboratory November 15-17, 2005

2. 2 (Units) Conversion Editor

3. 3 To Existing Measures, Edit Existing Unit Conversions and Add New Unit Conversions

4. 4 Using the equation of a straight line: y = mx + b Meaning: equals 1Independent variableDependent variableGrayed out value Grayed out value = User-defined slope + User-defined y-intercept Independent variable Dependent variable User-defined value for independent variable SlopeY-IntUnitBase Unit Factors Unit Dependent unit goes here Base Unit ValueUnit Value (Units) Conversion Editor A Green text box identifies user-defined input

5. 5 Using the equation of a straight line: y = mx + b Meaning: equals 1mft3.2808 = + 0mft1 SlopeY-IntUnitBase Unit Factors Unit ft Define the new Unit “ft” (for feet) as a function of the Base Unit “m” (for meters) ft = independent variable m = dependent variable y ft = 3.2802 (x m) Base Unit ValueUnit Value Example 1

6. 6 Define the new Unit “F” as a function of the Base Unit “C” C = independent variable F = dependent variable y F = 1.8 (x C) + 32 Using the equation of a straight line: y = mx + b Meaning: equals 1CF33.88 212 = 1.8 + 32CF100 SlopeY-IntUnitBase Unit Factors Unit F Base Unit ValueUnit Value Example 2

7. 7 Edit Degrees F, and Input Correction Incorrect conversion, so “Edit”

8. 8 There are 33.8 F to one C User-defined F = 9/5 C + 32

9. 9 Using the equation of a straight line: y = mx + b Meaning: equals 1cmnm1.0E+07 = + 0cmnm1 SlopeY-IntUnitBase Unit Factors Unit nm Define the new Unit “nm” (for nanometers) as a function of the Base Unit “cm” (for centimeters): cm = independent variable nm = dependent variable y nm = 10 7 (x cm) Base Unit ValueUnit Value Example 3

10. 10 Add the Conversion “nm”

11. 11 There are 10 7 nm to one cm User-defined

12. 12 Define the new Unit “K” as a function of the Base Unit “C” C = independent variable K = dependent variable y K = x C + 273 Using the equation of a straight line: y = mx + b Meaning: equals 1CK274 = 1 + 273CK1 SlopeY-IntUnitBase Unit Factors Unit K Base Unit ValueUnit Value Example 4

13. 13 Add the Conversion degrees Kelvin “K”

14. 14 There are 274 K to one C User-defined K = C + 273

15. 15 Add New Measures (e.g., Energy) and Unit Conversions (e.g., Joules, Calories, etc.)

16. 16 Example 5 Add the Measure of Energy Add Energy

17. Add a Measure of “Energy” with a Base Unit of “Joules”

18. Add Units of Calories “cal”

19. 1 cal = 4.184 J or 1 J = 0.239 cal

20. 20 Problem Add the following Energy Units 1 J = 0.239 cal = 6.238E+18eV = 9.869E-03 lit-atm = 0.738 ft-lbs = 9.483E-4 BTU 1 cal = 4.184 J = 2.61E19 eV = 4.129E-2 lit-atm 1 BTU = 778.3 ft-lbs = 1054.5 J 1 BTU equals how many calories?

21. Relationship Between BTU and Joules 1 BTU = 1054.5 J or 1 J = 9.48317E-4 BTU Note the difference in significant figures