Design Requirements Element

DOESTD107393

interfaces, and key activities necessary to fully implement the CM program. The organizational and

functional CM flowcharts used in the CM program plan should be retained and used in the training

process. Training based on these charts may be started as soon as the concepts have been agreed on

and approved by facility management.

Refresher training would be provided periodically (e.g., once a year) for approximately 4 to 8 hours to

reinforce the principles of configuration management, to review implemented CM methods, and to

advise personnel on any changes In CM tools or practices.

2.1.5 SPECIFIC APPLICATION OF GRADED APPROACH: PROGRAM MANAGEMENT ELEMENT

The size and complexity of the facility indirectly affects the number of SSCs included in the CM

program. For example, at a small facility, such as a nuclear hot cell facility, there are not many SSCs.

Accordingly, the number of SSCs that can be included in the CM program will be small.

The scope of the SSCs included in the CM program will affect the level of effort involved in every CM

program element and function. Facility management could (1) include all facility SSCs within the CM

program, (2) limit the scope to some minimum SSCs, or (3) choose a scope between these extremes.

At some facilities, it might be appropriate to limit the SSCs to those that provide personnel safety

protection. At others, such as nuclear waste tank farms, it might be appropriate to include those SSCs

that protect the environment. At other facilities, such as weapons facilities or alternate-energy

development facilities, it might be important to include the mission SSCs.

Because the magnitude of the CM program is so strongly influenced by the SSCs included in it,

contractor management might find it worthwhile to reevaluate the current classifications of systems

within the facilities. Some SSCs that have traditionally been classified as safety-related might not be

essential for safety. For example, many nuclear facilities have diesel generators that can provide

backup electric power in the event of a loss of normal power. Often, these generators are considered

safety-related because they have traditionally been classified that way. In some cases, safety is

assured regardless of the performance of the diesel generator. If the accident analysis can

demonstrate that an interruption of AC power for a significant period does not lead to unacceptable

safety consequences, and normal electric power is likely to be restored within that period, the diesel

generator is most likely not essential for safety. In such cases, classification of the diesel generator,

could be downgraded.

2.2 DESIGN REQUIREMENTS ELEMENT

As with other CM program elements, much more effort is necessary for initial establishment of this

program element than for its maintenance. For many facilities, establishing a complete and accurate set

of design requirements can involve more time and resources than any other CM program element.

However, this program element is essential because the design requirements are the foundation from

which the CM program basic relationships are maintained.

The top-level development flowchart for the design requirements program element is presented in

Figure 24. Existing design requirements are reviewed to establish the Best Available Design

Requirements. As new or revised design requirements are established, this information is fed into the

Best Available Design Requirements. Design requirements are correlated with SSCs through the CM

equipment database. With the design requirements established, system and component grading can be

accomplished. The two key inputs are the equipment scope criteria (from the program management

element) and the list of known SSCs. System grading establishes the scope of systems within the CM

program and assigns system grades according to the significance of the associated design

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