The Njoy Nuclear Data Processing System Version 91

By Macfarlane, R. E.

Book Id: WPLBN0000188786
Format Type: PDF eBook
File Size: 26.3 MB
Reproduction Date: 2008

Title:	The Njoy Nuclear Data Processing System Version 91
Author:	Macfarlane, R. E.
Volume:
Language:	English
Subject:	Government publications, Legislation., Government Printing Office (U.S.)
Collections:	Government Library Collection
Historic Publication Date:
Publisher:	Government Printing Office


Citation APA MLA Chicago Macfarlane, R. E. (n.d.). The Njoy Nuclear Data Processing System Version 91. Retrieved from http://gutenberg.cc/

Excerpt
Introduction: The NJOY nuclear data processing systeml’ 2 is a comprehensive computer code package for producing pointwise and multigroup nuclear cross sections and related quantities from evaluated nuclear data in the ENDF format. The U.S. Evaluated Nuclear Data Files (ENDF) have progressed through a number of versions, notably ENDF/B-111, ENDF/B-IV, and ENDF/B-V. The latest version, ENDF/B-VI,4 has recently become available. The ENDF format is also being used in other modern libraries such as the JEF-I and JEF-11 libraries produced in Europe. These libraries represent the underlying nuclear data from a physics viewpoint, but practical calculations usually require special libraries for particle transport codes or reactor core physics codes. This is the mission of NJOY- to take the basic data from the nuclear data library and convert it into the forms needed for applications.

Table of Contents
CONTENTS I. INTRODUCTION . . . . . . . . . . . . . . . . . . . . . . . . . . 1 A. The ModulesofNJOY . . . . . . . . . . . . . . . . . . . . . . 1 B. DataFlowin NJOY . . . . . . . . . . . . . . . . . . . . . . . . 3 C. Computer Implementation . . . . . . . . . . . . . . . . . . . . 6 D. Version Control . . . . . . . . . . . . . . . . . . . . . . . . . . 8 E. Test Problems . . . . . . . . . . . . . . . . . . . . . . . . . ..10 F. History and Acknowledgments . . . . . . . . . . . . . . . . . . 11 G. References . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14 II. NJOY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 A. The NJOYProgram . . . . . . . . . . . . . . . . . . . . . . . . 1 B. Interface Files . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 C. FreeFormatInput . . . . . . . . . . . . . . . . . . . . . . . . . 4 D. ENDFInput-Output . . . . . . . . . . . . . . . . . . . . . . . 6 E. Buffered Binary Scratch Storage . . . . . . . . . . . . . . . . . 10 F. Dynamic Storage Allocation . . . . . . . . . . . . . . . . . . . 11 G.ENDF/BUtilityRoutines . . . . . . . . . . . . . . . . . . . . 12 H. Math Routines . . . . . . . . . . . . . . . . . . . . . . . . . ..13 I. CCCCI/ORoutines . . . . . . . . . . . . . . . . . . . . . . . 14 J. System-Dependent Routines . . . . . . . . . . . . . . . . . . . 14 K. Error and Warning Messages . . . . . . . . . . . . . . . . . . . 15 L. Coding Details . . . . . . . . . . . . . . . . . . . . . . . . . . . 18 M. References . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25 III. RECONR . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 A. ENDF/B Cross Section Representations . . . . . . . . . . . . 1 B. Unionization and Linearization Strategy . . . . . . . . . . . . 2 C. Linearization and Reconstruction hfethods . . . . . . . . . . . 4 D. Resonance Representations . . . . . . . . . . . . . . . . . . . . 8 E. Code Description . . . . . . . . . . . . . . . . . . . . . . ...17 F. Input Instructions . . . . . . . . . . . . . . . . . . . . . . ...20 G. Error Messages . . . . . . . . . . . . . . . . . . . . . . . ...22 H. Input-Output Units . . . . . . . . . . . . . . . . . . . . . ...24 I. Storage Allocation . . . . . . . . . . . . . . . . . . . . . . ...24 J. References . . . . . . . . . . . . . . . . . . . . . . . . . . ...25 Iv. BROAD . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 A. Doppler-Broadening Theory . . . . . . . . . . . . , . . . . . . 1 B. Data-Paging Methodology . . . . . . . . . . . . . . . . . . . . 8 C. Coding Details . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 D. User Input........,.. . . . . . . . . . . . . . . . . . . 11 E. Error Messages . . . . . . . . . . . . . . . . . . . . . . . ...13 F. Input/Output Units . . . . . . . . . . . . . . . . . . . . . . . . 14 G. Storage Allocation . . . . . . . . . . . . . . . . . . . . . . ...14 H. References . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14 v. UNREST . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 A. Theory . . . . . . . . . . . . . . . . . . . . . . . . . . . . ...1 B. Implementation . . . . . . . . . . . . . . . . . . . . . . . . . . 12 C. User Input . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15 D. Output Example . . . . . . . . . . . . . . . . . . . . . . . . . . 16 E. Coding Details . . . . . . . . . . . . . . . . . . . . . . . . . . . 17 F. Error Messages . . . . . . . . . . . . . . . . . . . . . . . . . . 20