Yes ! Mesh tally files are not well documented
To understand the file it is necessary to work in 1D (and not in 3D)
For that you can put in your MCNP file :
SMESH1:p
CORA1 0 100i 1
CORB1 .0001
CORC1 .0001
ENDMD
In this MESH tally you will have 100 intervals for the radius and only one in phi and theta.
with "gridconv" the ASCII file is essak.txt
the file essakcomment.txt is commented.
It gives :
[TD]2,44E+03
[/TD]
[TR]
[TD]9,90E-03
[/TD]
[TD]3,48E+02
[/TD]
[/TR]
[TR]
[TD]1,98E-02
[/TD]
[TD]1,28E+02
[/TD]
[/TR]
[TR]
[TD]2,97E-02
[/TD]
[TD]6,58E+01
[/TD]
[/TR]
[TR]
[TD]3,96E-02
[/TD]
[TD]3,99E+01
[/TD]
[/TR]
[TR]
[TD]4,95E-02
[/TD]
[TD]2,68E+01
[/TD]
[/TR]
[TR]
[TD]5,94E-02
[/TD]
[TD]1,92E+01
[/TD]
[/TR]
[TR]
[TD]6,93E-02
[/TD]
[TD]1,44E+01
[/TD]
[/TR]
[TR]
[TD]7,92E-02
[/TD]
[TD]1,12E+01
[/TD]
[/TR]
[TR]
[TD]8,91E-02
[/TD]
[TD]8,99E+00
[/TD]
[/TR]
[TR]
[TD]9,90E-02
[/TD]
[TD]7,36E+00
[/TD]
[/TR]
[TR]
[TD]0,108911
[/TD]
[TD]6,13E+00
[/TD]
[/TR]
[TR]
[TD]0,118812
[/TD]
[TD]5,19E+00
[/TD]
[/TR]
[TR]
[TD]0,128713
[/TD]
[TD]4,45E+00
[/TD]
[/TR]
[TR]
[TD]0,138614
[/TD]
[TD]3,86E+00
[/TD]
[/TR]
[TR]
[TD]0,148515
[/TD]
[TD]3,38E+00
[/TD]
[/TR]
[TR]
[TD]0,158416
[/TD]
[TD]2,98E+00
[/TD]
[/TR]
[TR]
[TD]0,168317
[/TD]
[TD]2,65E+00
[/TD]
[/TR]
[TR]
[TD]0,178218
[/TD]
[TD]2,37E+00
[/TD]
[/TR]
[TR]
[TD]0,188119
[/TD]
[TD]2,13E+00
[/TD]
[/TR]
[TR]
[TD]0,19802
[/TD]
[TD]1,93E+00
[/TD]
[/TR]
[TR]
[TD]0,207921
[/TD]
[TD]1,76E+00
[/TD]
[/TR]
[TR]
[TD]0,217822
[/TD]
[TD]1,60E+00
[/TD]
[/TR]
[TR]
[TD]0,227723
[/TD]
[TD]1,47E+00
[/TD]
[/TR]
[TR]
[TD]0,237624
[/TD]
[TD]1,35E+00
[/TD]
[/TR]
[TR]
[TD]0,247525
[/TD]
[TD]1,25E+00
[/TD]
[/TR]
[TR]
[TD]0,257426
[/TD]
[TD]1,16E+00
[/TD]
[/TR]
[TR]
[TD]0,267327
[/TD]
[TD]1,07E+00
[/TD]
[/TR]
[TR]
[TD]0,277228
[/TD]
[TD]9,99E-01
[/TD]
[/TR]
[TR]
[TD]0,287129
[/TD]
[TD]9,33E-01
[/TD]
[/TR]
[TR]
[TD]0,29703
[/TD]
[TD]8,73E-01
[/TD]
[/TR]
[TR]
[TD]0,306931
[/TD]
[TD]8,18E-01
[/TD]
[/TR]
[TR]
[TD]0,316832
[/TD]
[TD]7,69E-01
[/TD]
[/TR]
[TR]
[TD]0,326733
[/TD]
[TD]7,23E-01
[/TD]
[/TR]
[TR]
[TD]0,336634
[/TD]
[TD]6,82E-01
[/TD]
[/TR]
[TR]
[TD]0,346535
[/TD]
[TD]6,44E-01
[/TD]
[/TR]
[TR]
[TD]0,356436
[/TD]
[TD]6,09E-01
[/TD]
[/TR]
[TR]
[TD]0,366337
[/TD]
[TD]5,77E-01
[/TD]
[/TR]
[TR]
[TD]0,376238
[/TD]
[TD]5,48E-01
[/TD]
[/TR]
[TR]
[TD]0,386139
[/TD]
[TD]5,20E-01
[/TD]
[/TR]
[TR]
[TD]0,39604
[/TD]
[TD]4,95E-01
[/TD]
[/TR]
[TR]
[TD]0,405941
[/TD]
[TD]4,71E-01
[/TD]
[/TR]
[TR]
[TD]0,415842
[/TD]
[TD]4,49E-01
[/TD]
[/TR]
[TR]
[TD]0,425743
[/TD]
[TD]4,29E-01
[/TD]
[/TR]
[TR]
[TD]0,435644
[/TD]
[TD]4,10E-01
[/TD]
[/TR]
[TR]
[TD]0,445545
[/TD]
[TD]3,92E-01
[/TD]
[/TR]
[TR]
[TD]0,455446
[/TD]
[TD]3,75E-01
[/TD]
[/TR]
[TR]
[TD]0,465347
[/TD]
[TD]3,60E-01
[/TD]
[/TR]
[TR]
[TD]0,475248
[/TD]
[TD]3,45E-01
[/TD]
[/TR]
[TR]
[TD]0,485149
[/TD]
[TD]3,31E-01
[/TD]
[/TR]
[TR]
[TD]0,49505
[/TD]
[TD]3,18E-01
[/TD]
[/TR]
[TR]
[TD]0,50495
[/TD]
[TD]3,06E-01
[/TD]
[/TR]
[TR]
[TD]0,514851
[/TD]
[TD]2,95E-01
[/TD]
[/TR]
[TR]
[TD]0,524752
[/TD]
[TD]2,84E-01
[/TD]
[/TR]
[TR]
[TD]0,534653
[/TD]
[TD]2,73E-01
[/TD]
[/TR]
[TR]
[TD]0,544554
[/TD]
[TD]2,64E-01
[/TD]
[/TR]
[TR]
[TD]0,554455
[/TD]
[TD]2,54E-01
[/TD]
[/TR]
[TR]
[TD]0,564356
[/TD]
[TD]2,46E-01
[/TD]
[/TR]
[TR]
[TD]0,574257
[/TD]
[TD]2,37E-01
[/TD]
[/TR]
[TR]
[TD]0,584158
[/TD]
[TD]2,29E-01
[/TD]
[/TR]
[TR]
[TD]0,594059
[/TD]
[TD]2,22E-01
[/TD]
[/TR]
[TR]
[TD]0,60396
[/TD]
[TD]2,15E-01
[/TD]
[/TR]
[TR]
[TD]0,613861
[/TD]
[TD]2,08E-01
[/TD]
[/TR]
[TR]
[TD]0,623762
[/TD]
[TD]2,01E-01
[/TD]
[/TR]
[TR]
[TD]0,633663
[/TD]
[TD]1,95E-01
[/TD]
[/TR]
[TR]
[TD]0,643564
[/TD]
[TD]1,89E-01
[/TD]
[/TR]
[TR]
[TD]0,653465
[/TD]
[TD]1,84E-01
[/TD]
[/TR]
[TR]
[TD]0,663366
[/TD]
[TD]1,78E-01
[/TD]
[/TR]
[TR]
[TD]0,673267
[/TD]
[TD]1,73E-01
[/TD]
[/TR]
[TR]
[TD]0,683168
[/TD]
[TD]1,68E-01
[/TD]
[/TR]
[TR]
[TD]0,693069
[/TD]
[TD]1,63E-01
[/TD]
[/TR]
[TR]
[TD]0,70297
[/TD]
[TD]1,59E-01
[/TD]
[/TR]
[TR]
[TD]0,712871
[/TD]
[TD]1,54E-01
[/TD]
[/TR]
[TR]
[TD]0,722772
[/TD]
[TD]1,50E-01
[/TD]
[/TR]
[TR]
[TD]0,732673
[/TD]
[TD]1,46E-01
[/TD]
[/TR]
[TR]
[TD]0,742574
[/TD]
[TD]1,42E-01
[/TD]
[/TR]
[TR]
[TD]0,752475
[/TD]
[TD]1,39E-01
[/TD]
[/TR]
[TR]
[TD]0,762376
[/TD]
[TD]1,35E-01
[/TD]
[/TR]
[TR]
[TD]0,772277
[/TD]
[TD]1,32E-01
[/TD]
[/TR]
[TR]
[TD]0,782178
[/TD]
[TD]1,28E-01
[/TD]
[/TR]
[TR]
[TD]0,792079
[/TD]
[TD]1,25E-01
[/TD]
[/TR]
[TR]
[TD]0,80198
[/TD]
[TD]1,22E-01
[/TD]
[/TR]
[TR]
[TD]0,811881
[/TD]
[TD]1,19E-01
[/TD]
[/TR]
[TR]
[TD]0,821782
[/TD]
[TD]1,16E-01
[/TD]
[/TR]
[TR]
[TD]0,831683
[/TD]
[TD]1,14E-01
[/TD]
[/TR]
[TR]
[TD]0,841584
[/TD]
[TD]1,11E-01
[/TD]
[/TR]
[TR]
[TD]0,851485
[/TD]
[TD]1,08E-01
[/TD]
[/TR]
[TR]
[TD]0,861386
[/TD]
[TD]1,06E-01
[/TD]
[/TR]
[TR]
[TD]0,871287
[/TD]
[TD]1,04E-01
[/TD]
[/TR]
[TR]
[TD]0,881188
[/TD]
[TD]1,01E-01
[/TD]
[/TR]
[TR]
[TD]0,891089
[/TD]
[TD]9,91E-02
[/TD]
[/TR]
[TR]
[TD]0,90099
[/TD]
[TD]9,70E-02
[/TD]
[/TR]
[TR]
[TD]0,910891
[/TD]
[TD]9,49E-02
[/TD]
[/TR]
[TR]
[TD]0,920792
[/TD]
[TD]9,29E-02
[/TD]
[/TR]
[TR]
[TD]0,930693
[/TD]
[TD]9,09E-02
[/TD]
[/TR]
[TR]
[TD]0,940594
[/TD]
[TD]8,90E-02
[/TD]
[/TR]
[TR]
[TD]0,950495
[/TD]
[TD]8,72E-02
[/TD]
[/TR]
[TR]
[TD]0,960396
[/TD]
[TD]8,54E-02
[/TD]
[/TR]
[TR]
[TD]0,970297
[/TD]
[TD]8,37E-02
[/TD]
[/TR]
[TR]
[TD]0,980198
[/TD]
[TD]8,20E-02
[/TD]
[/TR]
[TR]
[TD]0,990099
[/TD]
[TD]8,04E-02
[/TD]
[/TR]
[TR]
[TD]1
[/TD]
[TD][/TD]
[/TR]