CHAPTER 1: INTRODUCTION ORIGEN Code Evolution and Updates Purpose and Scope of ORIGEN2 Report Organization Overview CHAPTER 2: GENERAL CONSIDER

CHAPTER 1: INTRODUCTION

• ORIGEN Code Evolution and Updates

• Purpose and Scope of ORIGEN2

• Report Organization Overview

CHAPTER 2: GENERAL CONSIDERATIONS

• ORIGEN2 MAIN Routine Functions

• Variable Dimensioning System

• Free-Format Input Rules

• Command Concept Implementation

• Vector Organization (Output and Storage Vectors)

• Input/Output Unit Descriptions

• Nuclide Identifier System (6-digit coding)

• Machine Compatibility Issues

CHAPTER 3: MISCELLANEOUS INITIALIZATION DATA

• Fission Neutron Yields

  • Thermal and Fast Reactor Spectra

• (α,n) Neutron Production Rates

• Spontaneous Fission Neutron Yields

• Fractional Reprocessing Recoveries

  • Individual Element Recovery Sets

  • Element Group Recovery Sets

  • Element-to-Group Assignments

• Elemental Chemical Toxicities

• Maximum Permissible Concentration (MPC) Data

CHAPTER 4: ORIGEN2 COMMANDS (Detailed Reference)

Control and Setup Commands

• RDA - Read Comments

• TIT - Case Title

• BAS - Case Basis

• FAC - Calculate Multiplication Factor

• OUT - Print Calculated Results

• INP - Read Input Composition

• HED - Vector Headings

• REC - Loop Counter

• CUT - Cutoff Fractions for Summary Tables

Mathematical and Vector Operations

• KEQ - Match Infinite Multiplication Factors

• DOL - DO Loop Execution

• MOV - Move Vector Contents

• ADD - Add Two Vectors

Physical Process Commands

• BUP - Burnup Calculation

• IRF - Flux Irradiation

• IRP - Specific Power Irradiation

• DEC - Radioactive Decay

• PRO - Fuel Reprocessing

• MAC - Nuclide Accumulation

Data Management Commands

• PCH - Punch Output Vector

• LIP - Library Print Control

• LIB - Read Decay and Cross-Section Libraries

• PHO - Read Photon Libraries

• LPU - Data Library Replacement Cards

Output Control Commands

• OPTL - Activation Product Output Options

• OPTA - Actinide Output Options

• OPTF - Fission Product Output Options

Program Flow Commands

• CON - Continuation Marker

• STP - Execute and Branch

• END - Terminate Execution

• GTO - Go To Instruction Group

CHAPTER 5: DATA LIBRARIES

Library Types and Formats

• Decay Data Libraries

  • Format Specifications

  • Nuclide Parameter Definitions

• Cross-Section and Fission Product Yield Libraries

  • Effective One-Group Cross Sections

  • Fission Yield Data Structure

• Photon Data Libraries

  • 18 Energy Group Structure

  • Photon Yield Formats

Library Management

• Substitute Data Procedures

• Non-Standard Reaction Specifications

• Library Segment Organizations:

  • Activation Products

  • Actinides

  • Fission Products

CHAPTER 6: COMPOSITION SPECIFICATIONS

Input Methods

• Initial Material Compositions

  • Nuclide-by-Nuclide Specification

  • Natural Element Specification

• Continuous Feed Rates

• Continuous Removal Rates

Data Formats

• Control Character Definitions

• Unit Specifications

• Termination Conventions

CHAPTER 7: INPUT DECK ORGANIZATION

Deployment Configurations

• Source and Object Deck Organization

• Card-Based Library Input

• Tape/Direct-Access Library Input

Job Control Specifications

• File Assignment Procedures

• Unit Number Definitions

• System-Specific Requirements

CHAPTER 8: INPUT AND OUTPUT DESCRIPTION

Sample Problem Walkthrough

• Complete Input Deck Analysis

• Command Sequence Explanation

• Library Usage Examples

Output Organization

• Hierarchical Output Structure

  • Four-Level Organization Scheme

• Output Grouping Types

  • Reactivity and Burnup Data

  • Activation Product Segments

  • Actinide Segments

  • Fission Product Segments

  • Neutron Production Rates

  • Photon Production Rates

Output Unit Assignments

• Unit 6: Principal Output

• Unit 12: Table of Contents (Unit 6)

• Unit 11: Alternate Output

• Unit 13: Table of Contents (Unit 11)

• Unit 15: Debugging Information

• Unit 16: Variable Cross-Section Information

• Unit 7: Punched Output