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Application of the Graded Approach cont'd
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Hazard Analyses


DOE-STD -3009-94
Safety and Health No. 88-79897, March 1992.
29 CFR 1910.119, "Process Safety Management of High Hazardous Chemicals."
CO N T E N T G U I D A N C E F O R SE C T I O N S O F CH A P T E R 3
3.1
INTRODUCTION
This section provides an introduction to the contents of this chapter based on the
graded approach and includes objectives and scope specific to the chapter as
developed.
3.2
REQUIREMENTS
This section lists the design codes, standards, regulations, and DOE Orders that are
required for establishing the safety basis of the facility. The intent is to provide
only the requirements that are specific for this chapter and pertinent to the safety
analysis, and not a comprehensive listing of all industrial standards or codes or
criteria. SRIDS may be referenced as appropriate.
3.3
HAZARD ANALYSIS
This section describes the hazard identification and evaluation performed for the
facility. The purpose of this information is to present a comprehensive evaluation
of potential process related, natural events, and man- made external hazards that can
affect the public, workers, and the environment due to single or multiple failures.
Consideration will be given to all modes of operation, including startup, shutdown,
and abnormal testing or maintenance configurations. As is standard industrial
practice, examination of all modes of operation considers the potential for both
equipment failure and human error.
Hazard identification and evaluation provide a thorough, predominantly qualitative
evaluation of the spectrum of risks to the public, workers, and the environment due
to accidents involving any of the hazards identified. The evaluation identifies
preventive and mitigative features, including identification of expected operator
response to incidents (e.g., accident mitigation actions or evacuation) and
provisions for operator protection in the accident environment (see Table 3-1,
Action item/Comment column).
A basic flowchart for hazard/accident analysis is provided in Figure 3-1. The
major features of hazard analysis and the graded approach are captured in this
figure. Hazard identification provides the basis for the final hazard categorization
of the facility. That categorization is input for the graded approach for hazard
evaluation. Hazard Category 3 facilities are not required to perform formal,
quantitative accident analysis.
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