Analysis of Off-Normal Conditions

DOE-STD-6003-96

5.4 Analysis of Off-Normal Conditions

The requirements of this Standard indicate that the safety of fusion facilities should

be analyzed to demonstrate that the facility meets the evaluation guidelines discussed in

DOE-STD-6002. This section provides guidance on the type of analysis of off-normal conditions

required for use in meeting the evaluation guidelines and the fusion requirements related to no

off-site evacuation. The types of analyses used to demonstrate compliance with these require-

ments are different and need discussion in this section.

The level of analysis of off-normal conditions for fusion facilities should be based on the

risk to the public, the environment, and the worker. Facilities with minimal risk will only require

that a scoping conservative analysis be performed to satisfy the safety analysis requirements.

However, a facility with a large potential safety risk to the public, the workers, or the environ-

ment (Category 1 and 2 facilities) will require a more detailed analysis of off-normal conditions to

satisfy the safety analysis requirements for such facilities as given in this section.

It is important that the safety analysis address the institutional and human factors safety

issues. Experience has confirmed that the risk associated with operating nuclear facilities is a

combination of the institutional approach to safety, human factors safety, and safety in design.

As used here, the institutional approach to safety includes

a. management and organization of facility operations;

b. the safety culture sustained by management;

c. performance objectives and the measurement of operational performance;

d. management oversight and assessment;

e. feedback of operational experience;

f. management controls of operations, surveillance, and maintenance;

g. related management efforts to achieve and sustain safe operations.

Human factors safety, as used here, refers to

a. the allocation of control functions to personnel vs automatic devices;

b. staffing and qualification of operating crews;

c. personnel training;

d. the preparation, validation, and use of written procedures to guide operations,

surveillance, and maintenance;