Figure 3-3 Compiling the Set CM SSCs

DOE-STD-1073-2003

Configuration Management

Costly SSCs - SSCs that would be expensive to fix or replace or whose failure

could result in problems that could be expensive to fix;

Critical Software - Software whose proper performance is critical to the expected

performance of a safety SSC, a defense-in-depth SSC, or the safety of the nuclear

facility;

Master Equipment List (MEL) SSCs SSCs that are included in the maintenance

program; and

Adjacent SSCs - SSCs that are located adjacent to the safety or defense-in-depth

SSCs such that changes to these SSCs could negatively impact the safety or

mission of the activity.

Figure 3-3 illustrates the various sets of SSCs that should be considered by the contractor

when compiling the set of CM SSCs. The design authority should define the SSCs that

fall under each type. Some SSCs will fall under multiple designations.

Environmental

protection SSCs

Safety SSCs

Costly SSCs

Mission

MEL SSCs

CM SSCs

Critical SSCs

Adjacent

Critical

SSCs

software

Other

defense-in-depth SSCs

(including vital

safety systems not

in Safety SSCs)

FIGURE 3-3 COMPILING THE SET OF CM SSCS

Identified "systems" must have defined system boundaries and component lists. Defined

systems should contain those components necessary to accomplish the system's function

and meet the system's design requirements. Applicable design codes and standards often

define system boundaries. In addition, the following considerations may help to define

system boundaries for some facilities or activities:

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