Figure 5-1. Development of the seismic equipment list

DOE-HDBK-1129-99

analyses. These accident analyses should consider the appropriate facility hazards as required by

DOE Orders and Standards.

For the DOE facility being seismically evaluated, accident analyses and their results are typically

provided in a SAR. The preliminary SEL should be based on information provided in this SAR.

For a nonreactor nuclear facility, DOE-STD-3009 provides guidance on the preparation of a SAR.

Using the guidance in DOE-STD-3009 and the appropriate accident analyses in the SAR, SSCs

can be differentiated into Safety Class or Safety Significant, and the preliminary SEL can focus on

those facility SSCs. For facilities without a SAR, accident analyses comparable to those required

for a SAR should be performed.

FIGURE 5-1. Development of the seismic equipment list

Additional guidance for the development of the preliminary SEL is provided in DOE-STD-1021.

This Standard considers the results of facility hazard classification, SSC safety classification, and

performance categorization. With these considerations, the facility SSCs are assigned to the

appropriate performance category. The preliminary SEL focuses on those SSCs that are classified

above a specified performance category. In addition to selecting SSCs based on a SAR or DOE-

STD-1021, there are system safety considerations and seismic vulnerability considerations that

should be addressed when developing the preliminary SEL.

Next, the location of equipment items in the facility and in-structure response spectra for this level

or location are determined. The in-structure response spectra represent the modification of the

ground response spectra by the facility. There may be amplification or attenuation of the motion at

various frequencies at different locations within the facility. As discussed in DOE-STD-1020-94

(CH-1), the 5 percent damped in-structure response spectra is used for design or evaluation of

equipment at a specific location. Guidance for determining in-structure response spectra is

provided in the Standard. To evaluate equipment and distribution systems, the following items

should be considered: