Last version:
FLUKA 2023.3.3, January 31st 2024
(last respin 2023.3.3)
flair-2.3-0d 13-Sep-2023


-- Fluka Release
( 31.01.2024 )

FLUKA 2023.3.3 has been released.
Next FLUKA Course
The 23rd FLUKA course
will be held at the Lanzhou University, China, on June 1-8, 2024

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Calls user dependent initialisation.


The meaning of WHAT(1),...,WHAT(6), SDUM is defined by the user. A call to the user-written routine USRINI with 6 WHAT numerical values and one character string SDUM as arguments is issued every time this card is read

     Default (option USRICALL not given): no user initialisation


  • 1) In subroutine USRINI, WHAT and SDUM must be declared as follows:
              DOUBLE PRECISION WHAT (6)
              CHARACTER SDUM*8
  • 2) A description of routine USRINI and instructions about its use are given in (13)

  • 3) It is suggested that the USRINI routine shall contain at least the three standard INCLUDE files:
                             DBLPRC, DIMPAR, IOUNIT

Other useful files to be INCLUDEd, depending on the problem, can be BEAMCM, CASLIM, SOURCM, SUMCOU, FLKMAT, PAPROP, SCOHLP, USRBDX, USRBIN, USRSNC, USRTRC, USRYLD. See (13) for more information on INCLUDE files useful in user routines.


 USRICALL        123.      456.       1.0      -2.0      18.0      18. FLAG12
 *  Call initialisation routine passing over 6 numerical values and a string

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