The Accident Analysis Guidebook (AAG) is a project to develop a comprehensive document containing methodology, data sources and subject matter references for performing the major types of accident and consequence analyses relevant to DOE facility operations. In short, it is designed to be a "primer" for performing accident analysis that best meets Department of Energy (DOE) requirements for safety analysis documentation. A chapter containing illustrative examples of analyses for various source term types is planned. This memorandum outlines a schedule for submitting analysis examples and lists the source term categories that are of particular interest.

You are encouraged to review your recent experience at your site or laboratory and provide one or more candidates to be considered. An Accident Analysis Selection Panel will select a subset of contributed accident analyses from around the DOE Complex meeting the criteria contained in the next section. Panel members include Dae Chung, Louis Restrepo, Jofu Mishima, Al Wooten, Sandra Brereton, and Kevin O’Kula.

The candidate analyses that are sought should be examples of the level of quality and depth described in DOE Orders and Standards for Safety Analysis Reports and Basis for Interim Operation. Examples may be from existing safety documentation that is DOE-STD-3009-94 or DOE-STD-3011-94 compliant, or is completed (reviewed and approved) but awaiting publication. Other criteria include:

• Representative of graded approach
• An accident type that by process or storage similarity is of interest to many DOE sites and laboratories
• An analysis approach that provides particular insights, or demonstrates a systematic process to resolving major source term, consequence, or operational concerns, and the selection of controls
• Shows completeness, thoroughness, comprehensiveness, and innovative approach features
• Implements appropriate use of computer models as tools, and
• Quality of technical writing, and adequately referenced.

While the Selection Panel will ultimately need to review pertinent parts of the published analysis and supporting analyses (Engineering Reports, Calculations and Memoranda), the first goal shall be to construct a short list of examples that adequately spans the major source term types. The method for submitting candidates is by using the short submittal format (AA-submit). The analyses selected for full development will be identified and expanded during July and August of this year. We anticipate several iterations between the Selection Panel and the nominating organization to develop the publishable text.

The schedule for collecting candidate analyses and developing the selected ones into full text is shown in Table 1 below.

The targeted areas for the Accident Analysis Guidebook listed in Table 2. The Guidebook will also contain analyses that are not fully detailed, and indicate how to access further information on these examples

(Section 10 – OTHER ANALYSES FOR REFERENCE).

1. EXPLOSIONS

1.1 Deflagration (Explosion of Gas-Oxidant Mixtures in Containment)

1.2 Detonation (Explosion Involving Condensed-Phase Reactants)

1.3 Physical Explosions (P:V Over-pressurization)

1.4 Explosion of Combustible Liquid Fuel Mists

1.5 Explosion of Dispersed Dust/Fuel Particles

2. FIRES

2.1 Gaseous Fuels (Including Vapors and Mists)

2.2 Liquid Standing Pool Fire

2.3 Solids

2.4 Bulk reactive metals

2.5 Bulk combustible solids

2.6 Powders

2.7 Contaminated combustible waste

2.8 Loose material with contaminant exposed to atmosphere

2.9 Combustible materials in containers

2.10 Wooden crate

2.11 Metal drums

2.12 Bagged in plastic

3. SPILLS

3.1 Powders

3.2 Liquids/Radiological

Liquids/Chemical

4. TRITIUM OXIDATION AND RELEASE
5. MECHANICALLY INITIATED RELEASES
6. EXTERNALLY INITIATED RELEASES WITH SUBSEQUENT RELEASE

6.1 Seismic Events

6.2 Natural Phenomena Events (High Winds, Tornado, etc.)

6.3 Transportation (including aircraft crash)

7. INADVERTENT CRITICALITY
8. LIQUID PATHWAYS
9. OTHER CATEGORIES
10. OTHER ANALYSES FOR REFERENCE

(Listing additional examples not developed fully in the Guidebook)