Correlation of Design Basis to Design Requirements

DOESTD107393

of the DR program available for use, as it occurs long before the preparation and issuance of DISs.

Adding only validated design information to the CM equipment database ensures that the database

remains a credible source of design information. Timely release of the extracted design information

depends on the timely verification and validation thereof.

The verified and validated design requirements should be reviewed for impact on system and

component grading when entering them into the CM equipment database. As information is entered

into the database, ft may be found that different pieces of validated information are in conflict. If so, an

open item or discrepancy should be identified for evaluation through the DR program discrepancy

resolution process. Until the Item is resolved, the associated data entries should be removed from the

CM equipment database because their validity is in question.

Reconstituted design requirements should be released and forwarded through the established change

control and document control processes exactly as they would be if they were new requirements. This

is necessary to ensure that the physical configuration and, particularly, the facility documentation

accurately reflect these requirements. One approach would be to group reconstituted design

requirements by system at various stages of reconstitution and provide them to other organizations so

that they could make necessary changes in configuration documents under their control. Treating the

issuance of reconstituted design requirements with controls similar to those for new designs should

instill the necessary discipline into the information release process. Each affected organization would

acknowledge receipt of the reconstituted design requirements and the incorporation thereof into their

documents. Any open items would be identified and resolved at that time. Similarly, open items

identified in walkdowns or record searches would be reconciled with the design requirements. In this

manner, the reconstituted design requirements would be reconciled with the physical configuration and

the facility documents long before the DIS field validation, which is the final check.

Design basis information need not be released in this manner, however, because the physical

configuration and facility documents reflect the design requirements, not the design basis. Validated

design basis information should be released and reviewed within the design authority and supporting

design organizations to ensure that design documents are consistent.

3.3.4 CORRELATION OF DESIGN BASIS TO DESIGN REQUIREMENTS

The validated design basis information is examined against the facility design requirements to establish

a one-for-one correlation and to expose any incompleteness in the retrieved requirements and basis.

Where the design basis is incomplete or nonexistent, the missing information should be noted. The CM

equipment database, which relates the facility SSCs and design requirements, should be used to

support this correlation.

3.3.5 TECHNICAL MANAGEMENT REVIEW OF DESIGN INFORMATION

After technical validation and correlation, a technical management review similar to that conducted

initially in the design requirements element should be used to evaluate both completeness and validity

of the extracted design information. The review should independently assess the previous technical

validation efforts and determine whether additional technical validation activities are needed. It should

also determine whether any design information is missing and identify the missing design information.

Missing and inaccurate design information will be candidates for regeneration.

The need for additional, detailed technical validation is to be expected for critical design information. In

determining whether further technical validation is needed, the following should be considered: the

status of the original design and construction documents, their importance to facility safety and mission,

the extent or frequency of post-construction changes, the effectiveness of the facility modification

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