Hazard and Accident Analyses - doe-std-1104-96

DOE-STD-1104-96

A description of the facility's life-cycle stage, mission(s), scope of

operations, and the design of safety structures, systems, and

components is presented, including explan ation of the impact on the

facility safety basis.

Clear basis for and provisions of exemptions, consent agreements, and

open issues are presented.

Description of the site, facility, and operational processes provide a

knowledgeable reviewer sufficient background material to understand the

major elements of the safety analysis.

Correlation is established between actual facility arrangements and

operations with those stated in the DSA. This may be accomplished

successfully through reference to facility walkthroughs during DSA

preparation. Walkthroughs may also be warranted during DSA review to

provide some level of assurance that the actual physical arrangement of

a facility corresponds to that documented in the DSA. For example, a

walkthrough may be considered for a facility and/or operation that was

modified in the time frame between when DSA development was started

and completed. This is not intended to imply the review team must

perform detailed verifications of facility configuration. The objective is to

allow the review team to conclude that the basic descriptions provided

are fundamentally up-to-date and correct.

2.2

Hazard and Accident Analyses

Another of the DSA approval bases is hazard and accident analyses and forms the

foundation upon which the remaining approval bases (i.e., safety SSCs, derivation of

TSRs, and safety management program characteristics) rely. Determining the adequacy

of hazard and accident analyses generally entails being able to conclude that the DSA

contains sufficient documentation and basis to arrive at the following conclusions:

The hazard analysis includes hazard identification that specifies or

estimates the hazards relevant for DSA consideration (i.e., both natural

and man-made hazards associated with the work and the facility) in

terms of type, quantity, and form, and also includes properly performed

facility hazard categorization.

The final hazard category for the facility is determined consistent with

DOE-STD-1027 Change Notice No. 1 or successor document. Any

differences between the final hazard category and the initial hazard

category are explained.

The hazard analysis includes hazard evaluation that covers the activities

for which approval is sought, is consistent in approach with safe harbor

methodologies, identifies preventive and mitigative features for the

spectrum of events examined, and identifies dominant accident

scenarios through ranking.

The hazard analysis evaluates normal, abnormal, and accident

conditions, including consideration of natural and man -made external

events, identification of energy sources or processes that might

contribute to the generation or uncontrolled release of radioactive and