Risk - doe-hdbk-1188-20060086

DOE-HDBK-1188-2006

537.

RISK. The quantitative or qualitative expression of possible loss that considers both the

probability that a hazard will cause harm and the consequences of that event. [DOE O

5480.30]

538.

RISK-INFORMED. Using knowledge of the risk. [DOE G 450.4-1B]

539.

ROOT CAUSE. The determination of the causal factors preceding structures, systems, and

components (SSC) failure or malfunction - that is, discovery of the principal reason why the

failure or malfunction happened leads to the identification of the root cause. The preceding

failure or malfunction causal factors are always events or conditions that are necessary and

sufficient to produce or contribute to the unwanted results (failure or malfunction). The types of

causal factors are: (1) direct causes, (2) contributing causes, and (3) root causes. The direct

cause is the immediate event or condition that caused the failure or malfunction. Contributing

causes are conditions or events that collectively increase the likelihood of the failure or

malfunction, but that individually do not cause them. Thus, root causes are events or conditions

that, if corrected or eliminated, would prevent the recurrence of the failure or malfunction by

identifying and correcting faults (often hidden) before an SSC fails or malfunctions. [DOE G

433.1-1]

540.

ROOT CAUSE ANALYSIS. Any methodology that identifies the causal factors that, if

corrected, would prevent recurrence of the accident. [DOE G 225.1A-1]

541.

ROUTINE OPERATION. Routine operation of an accelerator commences at that point where

DOE authorization has been granted either (1) because the commissioning effort is sufficiently

complete to provide confidence that the risks are both understood and acceptable and the

operation has appropriate safety bounds, or (2) to permit the reintroduction of a particle beam

after being directed to cease operation by DOE because of an environmental, safety, or health

concern. [DOE 0 5480.25 cancelled, DOE G 420.2-1]

542.

SAFETY ANALYSIS. A documented process:

A. to provide systematic identification of hazards within a given DOE operation;

B. to describe and analyze the adequacy of the measures taken to eliminate, control, or

mitigate identified hazards; and

C. to analyze and evaluate potential accidents and their associated risks.

[DOE O 5480.30]