Charter

The Accident Analysis Subgroup (AAS) of EFCOG was formed in 1998 as a consolidation of Computer Codes, Release Fractions, and Waste Drum Fire organizations.

Scope

The purpose of the AAS is to provide methodology recommendations and guidance to the DOE Complex in the performance of facility accident and consequence analyses supporting documentation. The AAS products and deliverables therefore ensure resulting analyses at individual DOE sites are conservative, appropriate for the hazard level of the facility, and cost effective, while meeting DNFSB, DOE and other applicable regulatory standards.

Goals

  • Identify common issues, modeling needs, data requirements, solution approaches for safety analysis throughout the DOE Complex.

  • Produce guidebooks to foster consistency in accident analysis.

  • Empower task teams to address core and special purpose issues {waste drum fires, aqueous releases, etc.}, and communicant strategies for dispositioning.

  • Provide computer model evaluations for major phenomenological areas of source term development, in-facility transport, and atmospheric/aqueous release, dispersion, and consequence evaluation.

  • Facilitate training on appropriate methods, computer models, parameter & input data utilization, output interpretation, and integrated analysis concepts.

  • Develop new methods and models as needed or requested by DOE, and provide organizational assistance for testing, documentation, and distribution of improved methodologies.

  • Foster communication on issues, concerns, and solutions among related EFCOG SAWG subgroups, member organizations, the Department of Energy, and other regulatory bodies, commercial industry groups (e.g. Center for Chemical Process Safety, etc,).

Sites Represented

Current membership in AAS includes the following sites: Brookhaven National Laboratory, Hanford (Fluor and Waste Management Federal Services), Idaho National Engineering & Environmental Laboratory (Bechtel BWXT Idaho, LLC), Lawrence Livermore National Laboratory, Los Alamos National Laboratory, Oak Ridge (Lockheed Martin Energy Systems), Mound (EG&G Mound Applied Technologies), Rocky Flats Environmental Technology Site, Sandia National Laboratories, Savannah River (Westinghouse Safety Management Solutions), and the Waste Isolation Pilot Plant.

DOE and DNFSB Liaisons

Kamiar Jamali, Dae Chung (DOE/DP-45), Sarbes Acharya (DOE/EH-32) and Tam Tran (DOE/Savannah River) are DOE Liaisons. Charles Martin and Joe Roarty are advisors from the Defense Nuclear Facilities Safety Board staff.

Accomplishments

In 1998, the AAS provided in-depth training in source term analysis, chemical and radiological dispersion/consequence analysis to over 150 analysts and stakeholders through a series of workshops. The subgroup also initiated an Accident Analysis Guidebook project involving over twenty individuals. This effort will produce guidance in the selection of methods, data, and other insights to support DOE facility accident analysts, and is expected to result in a first draft by the end of CY 1999.

Planned Activities

  • Accident Analysis Guidebook (mid-2000)

  • DOE Accident Analysis Workshop: Sunday - Monday, 13 - 15 June 1999 (Portland, OR) with sessions on:

  • MACCS2

  • Chemical Source Term Modeling and Consequence Evaluation

  • Integrated Accident Analysis

  • Fire Modeling

  • Explosion Modeling

  • Spill Analysis Modeling

  • Criticality Modeling

  • In-Facility Transport Analysis

  • Sources of Data and Reference Material