Table 4.2. Main Headings of Well's Checklist

DOE-HDBK-1100-2004

Table 4.2. Main Headings of Well's Checklist

Basic process considerations

Some overall considerations

Operating limits

Modes of plant start-up, shutdown, construction, inspection and maintenance, trigger events and deviations

of system

Hazardous conditions

Ways of changing hazardous events or the frequency of their occurrence

Corrective and contingency action

Controls, safeguards and analysis

Fire, layout and further precautions

Documentation and responsibilities

Source: King, 1990.

.DOCUMENTING THE RESULTS. Qualitative results of checklist analyses vary, but

generally the analysis produces the answers "yes," "no," "not applicable," or "needs more

information." The checklist should be included in the PrHA report. The PrHA team

should summarize the deficiencies noted during the walkthroughs and/or meetings.

Understanding these deficiencies usually leads to the development of a list of possible

safety improvement alternatives for managers to consider, or a list of identified hazards

and a set of suggested actions.

4.1.3 Staffing Needs and Time

Any engineer with knowledge of the subject process should be able to use a checklist.

Because the PSM Rule requires a team approach, more than one analyst should be

involved in preparing the checklist and applying it to the process. The results of the

analysis should be reviewed by an independent analyst.

An estimate of the time required to perform a PrHA using the checklist analysis method

is given in Table 4.4.