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MCNP burn card

  1. Oct 23, 2014 #1
    Hello Every body,
    I hope all is well.
    I have a problem with MCNP6 code for using burn card, so please can anybody help me ?
    ---------------------------------------------------------------------------
    particle maximum smallest largest always always
    cutoff particle table table use table use model
    particle type energy energy maximum maximum below above
    1 n neutron 0.0000E+00 1.0000E+36 2.0000E+01 1.5000E+02 0.0000E+00 1.0000E+36

    fatal error. Models required. Cannot use memory reduction option.
    -----------------------------------------------------------------------------------------


    i dont konw why that fatal error occured.

    I will give you my simple input.


    -------------------------------------------------------------
    Example
    1 8 -15.973 -1 25 -27 imp:n=1 VOL=21.9982
    2 0 #1 imp:n=0
    1 cz 0.2837 $ Fuel(F)
    25 pz -43.5 $ Lower Reflector(F)
    27 pz 43.5 $ Inner Fuel(F), HT9 Follower(C)
    BURN TIME = 120
    MAT = 8
    POWER = 1.0
    PFRAC = 1.0
    BOPT = 1.0 -24 1.0
    m8 92234 3.0959E-05
    92235 9.8822E-04
    92236 6.0099E-05
    92238 6.0904E-01
    93237 5.5808E-03
    94236 2.7995E-08
    94238 2.7918E-03
    94239 7.2628E-02
    94240 3.3563E-02
    94241 9.0784E-03
    94242 6.7610E-03
    95241 6.5719E-03
    95242 1.7994E-04
    95243 1.3456E-03
    96242 2.2685E-04
    96243 7.5349E-06
    96244 3.3887E-04
    96245 3.0141E-05
    96246 2.0876E-06
    40090 1.1575E-01
    40091 2.5243E-02
    40092 3.8584E-02
    40094 3.9101E-02
    40096 6.2994E-03
    42000 2.5799E-02
    nlib=66c $ Active Fuel Slug(Middle Core)
    kcode 8000 1.0 30 130
    ksrc 0 0 0
    ------------------------------------------------------------------
    Regrads
     
  2. jcsd
  3. Oct 28, 2014 #2

    Astronuc

    User Avatar
    Staff Emeritus
    Science Advisor

    Make sure the units and magnitudes are correct.

    What is 1.0000E+36? That seems like a large number.
     
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