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PREPRO 2007 is ENDF/B-VII Tested

Updated March 17, 2007

(See History for Details of 2007 Updates)

What is PREPRO?

The ENDF/B Pre-processing codes (PREPRO), is a collection of 16 computer codes,

which are designed to convert ENDF/B formatted neutron and/or photon data

from the original distributed form to a form in which the data can be used in applications.

These codes also allow you to view the data.

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

Here you can download the codes and documentation for ANY computer


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 2007 (2007 Version) to accurately process current ENDF/B-VII evaluations.

The present codes can handle all existing ENDF/B-VI evaluations through release 8, which is the last release of ENDF/B-VI.

The present codes are also now been tested to insure they handle new evaluation in the ENDF/B-VII.0 Library.


Documentation is NOT included with downloaded codes for each computer.

You must download documentation separately.

Download Codes

Download Documentation

Request PREPRO 2007 CD or Register as User

PREPRO 2007 History: Check for Changes that Effect you