1. O AK R IDGE N ATIONAL L ABORATORY U. S. D EPARTMENT OF E NERGY 1 GipGui: A Graphical User Interface for the GIP Cross Section Preparation Code ANS M&C Gatlinburg, TN April 9, 2003 Douglas E. Peplow Nuclear Science and Technology Division Oak Ridge National Laboratory Yousry Y. Azmy Department of Mechanical and Nuclear Engineering Pennsylvania State University

2. O AK R IDGE N ATIONAL L ABORATORY U. S. D EPARTMENT OF E NERGY 2 GIP - Mixes Group Cross Sections for DOORS  GIP input deck is instructions for combining elemental cross sections using any combination of elements from a given library file or from manually-entered elemental cross sections  each P l component listed as separate materials  P l components are built by instructions mixture N = mixture N + material M *density input file: N M density  densities MUST be atom/(b cm)  strict formatting, not very readable  steep learning curve

3. O AK R IDGE N ATIONAL L ABORATORY U. S. D EPARTMENT OF E NERGY 3 Example – natural iron and carbon steel Library 1 7 al27 75 7 c 187 7 fe54 195 7 fe56 203 7 fe57 211 7 fe58 333 7 mn55 505 7 si 607 5 zr 1$$ 69 3 4 72 63 / # grps; total; self sc; tbl lnth; mxng tbl 6 612 702 0 5 / cards; tape; total mats; frwrd; Pl order 2 2 2 / prnt-; output mixs only; DOT4 format a18 8 21 / output & input library units e t 13$$ 610i 1 612 / Set ID numbers for nuclides from library 7$$ / translate card material by 612 & all tape materials by -6 4i 613 618 610i 1 612 82i 619 702 10$$ / Specify material number for each mixture: 4r-661 / 9. 4 nuclides in natural iron 4r-673 / 10. 4 nuclides in carbon steel 11$$ / Specify material number for nuclides in each mixture: / 9. natural iron: Fe54 Fe56 Fe57 Fe58 187 195 203 211 / 10. carbon steel: C Si Mn55 Fe 75 505 333 661 12** / density in atoms per b.cm for each nuclide / 9. natural iron: Fe54 Fe56 Fe57 Fe58 5.011-3 7.790-2 1.784-3 2.378-4 / 10. carbon steel: C Si Mn55 Fe 7.883-4 4.214-4 3.878-4 8.401-2 t

4. O AK R IDGE N ATIONAL L ABORATORY U. S. D EPARTMENT OF E NERGY 4 Need a better way to make GIP input decks  treat materials as materials, handle P l components behind-the-scenes  easier way to enter data by hand  easier way to specify material compositions  eliminate the need to learn formatting  ability to edit existing input decks (back- compatibility)  perhaps even run GIP without ever seeing the input deck

5. O AK R IDGE N ATIONAL L ABORATORY U. S. D EPARTMENT OF E NERGY 5 GipGui

6. O AK R IDGE N ATIONAL L ABORATORY U. S. D EPARTMENT OF E NERGY 6 GipGui  written in Java, machine independent  creates new and edits existing input decks  manually entered data input into easy-to-read table  user can specify material composition 8 different ways  elemental and nuclear data on main screen  extra comments and data embedded into GIP standard input file

7. O AK R IDGE N ATIONAL L ABORATORY U. S. D EPARTMENT OF E NERGY 7

8. O AK R IDGE N ATIONAL L ABORATORY U. S. D EPARTMENT OF E NERGY 8 Material Specification – H 2 O (H 1, O 16 )  atomic densities  H: 0.0669 atoms/(b cm)  O: 0.0334 atoms/(b cm)  atom fractions  total: 0.10031 atoms/(b cm)  H: 0.6667  O: 0.3333  molecular formula  total molecular weight: 18.0105 g/mol  total density: 1.000 g/cm^3  H: 2  O: 1  unitless - user supplies multiplier  mass densities  H: 0.1119 g/cm^3  O: 0.8881 g/cm^3  mass fractions  total: 1.0000 g/cm^3  H: 0.1119  O: 0.8881

9. O AK R IDGE N ATIONAL L ABORATORY U. S. D EPARTMENT OF E NERGY 9

10. O AK R IDGE N ATIONAL L ABORATORY U. S. D EPARTMENT OF E NERGY 10 Requirements and Restrictions  Requirement  a library index file describing what is in the actual library (GipGui can help user create this)  Restrictions  "=gip" or "=end" not permitted  Stacked cases not allowed  Only comment character is “/”  Empty lines read as zeros  “0” entry in 10$ array not permitted

11. O AK R IDGE N ATIONAL L ABORATORY U. S. D EPARTMENT OF E NERGY 11 Future of GipGui To the GIP community - Help Us Help You We need feedback from the user community to tell us if this is useful and how to make it better.

12. O AK R IDGE N ATIONAL L ABORATORY U. S. D EPARTMENT OF E NERGY 12 Warning: GipGui was designed by Engineers