KENO-VI Updates for SCALE 4.4a README file        April 29, 2002

Description of Updates
----------------------
Some significant corrections and enhancements have been made to KENO-VI
since its release in SCALE.4.4a.

The current update (4/29/2002) contains corrections to subroutines
FINDBX and TRACK that resolve several infinite loop problems reported by
users.

The previous update (3/21/2002) contained corrections to subroutines
ALBEDO and TRACK that resolve several infinite loop problems reported by
users and are also included in the current update file.

The following fixes appeared in the 6/15/2001 update on the web and are 
also included in the current update file.

(1) The code was modified to allow a unit in an array to contain a hole
    as its only region. PRIOR TO THIS FIX, THE CODE MIGHT RUN AND GIVE
    ERRONEOUS RESULTS.

(2) An error was corrected where several identical fuel assemblies, all
    represented by the same unit number were loaded into an array. THE
    K-EFF FOR THIS CASE WAS APPROXIMATELY 25% LOW. If each assembly in
    the array was represented by a unique unit number (each unit was
    identical), the correct calculated k-eff value was obtained.

(3) Three options were added to read from input or calculate
    approximately the correct geometry volumes so the fluxes and fission 
    densities would be appropriately normalized.

(4) An error was corrected that caused a particle to go into an
    infinite loop due to a round-off error when trying to exit an array.

(5) An error was corrected where a particle could go into an
    infinite loop when a unit shares an outer boundary with a chord and is
    in an array.

(6) The code was corrected for a fatal error that occurred when the
    option to collect matrix information by array number at the highest
    array nesting level (HAL=YES) is activated.

Installation of Updates
-----------------------
If you have the PC version of SCALE, download the kenovi_update3_4.4a.exe
self-extracting file and install in the directory where SCALE 4.4a is already
installed. The files will automatically be installed in the
appropriate subdirectories.

If you have the Unix version of SCALE, download the kenovi_update3_4.4a.tar.gz
file and extract the updated Fortran source files. Then make KENO-VI and
CSAS6 again. Note that Internet Explorer may rename the Unix file 
kenovi_update3_4.4a.tar.tar. If so, rename it kenovi_update3_4.4a.tar.gz before 
extracting the files.