PREPRO 2015 Home Page

PREPRO 2015 is ENDF/B-VII.1 Tested
Original 2015 Distribution: January 31, 2015
Updated 2015-2 Distribution: March 31, 2015
(See History for Details of 2015 Updates)

What is PREPRO?

The ENDF/B Pre-processing codes (PREPRO), is a collection of 18 computer codes, which are designed to convert ENDF/B formatted neutron and/or photon data from the originally distributed form to a form in which the data can be used in applications.

These codes also allow you to view the data, on-screen and/or hardcopy.

The ENDF/B Pre-Processing Codes run on virtually ANY Computer.

Pre-Processing code output is Completely FORTRAN, C and C++ Compatible.

Here you can download the codes and documentation for ANY computer.

Here you can also download the BEST Input Parameters to use with each code.


Recent changes in ENDF/B-VII Format and procedures, as well as the evaluations themselves makes it impossible for versions of the ENDF/B pre-processing codes earlier than PREPRO 2015 (2015 Version) to accurately process current ENDF/B-VII evaluations.

The present codes can handle all existing ENDF/B-VII.0 and VII.1 evaluations.

Documentation is NOT included with downloaded codes for each computer. You must download documentation separately.

Download Codes
Download Documentation
Download BEST Input Parameters
Request PREPRO 2015 CD or Register as User
PREPRO 2015 History: Check for Changes that Effect you