Sample Problem 3. Coupled Set

This example shows how to produce a simple coupled set.

  TEST 3 -- COUPLED SET
  0  3  0  12  1  1  0  3  0  0
  42  2  46  0  0  1  1  2  1  2
  AL-27
  * */
  1  1  AL27/ 
  HEAT
  1  HEAT/  NN AND NG PART
  1  GHEAT/  GG PART
  STOP

This time output in FIDO format was requested. FIDO suppresses many of the zeroes in the output file. The coupled option was selected, and 42 had to be given for the number of groups (MATXS5 is a 30 x 12 library). The nn, ng, and gg blocks for AL27 are automatically moved to the correct part of the coupled set. The photoatomic data are really elemental in nature, but the MATXS file now contains duplicate tables for each isotope, for convenience, and it is no longer necessary to name both AL27 and AL in TRANSX input decks. The edit cross sections GHEAT and HEAT are also automatically moved to their proper positions in the coupled set; the former ends up as position 1 for groups 31 to 42, the latter in groups 1 to 30. A partial listing of the FIDO tables is given here.

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