Establishment of Design Requirements and Design Basis

DOESTD107393

requirements. Component grading continues this SSC grading process at the component level. The

component-level grading activity also establish the system boundaries and refines the assignment of

components to systems. The SSC grades are fed into the CM equipment database.

2.2.1 ESTABLISHMENT OF DESIGN REQUIREMENTS AND DESIGN BASIS

The top-level flowchart for establishment of the design requirements is presented in Figure 25. This

process involves the review of existing design requirements, as well as the addition of new and revised

design requirements through design reconstitution and the ongoing design process.

Configuration management program criterion 1.3.2.1 states that the design requirements and design

basis should be formally established, documents, and maintained. The CM program should identify the

various processes and procedures used to establish the design requirements and design basis. For new

facilities and physical changes to existing facilities, the program should ensure that procedures are in

place that adequately establish the associated design requirements and their design basis, and that

document them in a form suitable for use in the CM program. Documentation of the design

requirements includes their correlation with associated SSCs and their categorization by type (i.e.,

safety, environmental, mission, and other). Documentation of the design basis involves its correlation

with associated design requirements. Once the design requirements and design basis are established

and documented, the CM program should ensure that processes and procedures are in place to

maintain them so that they are complete and accurate.

2.2.1.1 Interim Measures for Design Requirements Element

During the development of the CM program plan, the effectiveness of existing programs and

procedures is assessed. These initial assessments may Identify cases in which the design

requirements and basis were not fully documented, not accurate, or not complete. The following are

examples of interim measures that may be needed until development of the design requirements

program element is complete:

Additional controls to ensure that newly generated design requirements and design basis are

maintained and available

Additional procedural guidance on sources of design requirements to ensure that an

adequate design envelope review is performed for potential facility changes

Additional procedural guidance to ensure that designers thoroughly research the existing

design basis before issuing new designs

Additional procedural guidance to ensure that the design process produces a complete set of

design requirements and design basis for each new design or design change (See Appendix

lIA for more information on various design controls.)

Actions to prevent the destruction or disposal of source documents containing design

requirements and design basis information

Actions and controls to ensure that the knowledge of experienced engineering and operations

personnel regarding facility design requirements and design basis is not lost when they

transfer or retire; this includes actions to collect and record design information from personnel

who recently transferred, retired, or are near retirement

II-17