Facility and Work Description

DOE-STD-1120-2005/Vol. 1

Introduction

Facility and Work Description (Section 3.1)

Site Location

SSCs

Operational History

Decommissioning Activities and Techniques

Hazard and Accident Analysis (Section 3.2)

Methodology

Hazard Analysis Results (includes hazards identification, categorization, evaluation)

Accident Analysis (Hazard Category 2 facilities with accidents that potentially challenge the

Evaluation Guideline)*

Hazard Controls (Section 3.3)

Safety SSCs (includes safety functions, functional requirements, system evaluation)*

Safety Management Programs

Specific Administrative Controls

Derivation of TSRs*

*Not required for Decommissioning that involves only Low Level Fixed Residual Radioactivity

Figure 2. Simplified DSA Format for Decommissioning Project

3.1 Facility and Work Description

A description of the facility and the decommissioning work activities should be presented to the

extent needed to facilitate an understanding of the hazard analysis. Some of this information will

be available in DSAs prepared during previous operational phases of the facility. It is important

that this section of the DSA be consistent with information presented in Decommissioning Plans

(DP). Contractors may choose to incorporate the DP into the safety basis by reference, rather

than repeating the information within the DSA.

This chapter of the DSA should include descriptions of site location, systems, structures and

components, facility operational history, and decommissioning activities and techniques.

3.1.1 Site Location

The location of the facility and its relationship to nearby structures is important data for

understanding potential on or off-site impacts from decommissioning operations. Nearby

facilities, structures and buildings in which there may be persons or equipment that could be

affected by events occurring during the decommissioning project, and their physical relationship

to the facility being decommissioned, should be listed. The locations of potentially affected

members of the public near the site should also be given. Transportation routes for equipment

and materials, both off-site and within the site, should also be described.

Analytical data that is used for atmospheric dispersion of airborne releases including

meteorological data and distances and directions to potential receptors may be simplified within

the DSA commensurate with the level of rigor necessary in the hazard and accident analysis.

This information is not needed within HC3 facility DSAs that only require qualitative hazard

analysis.

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