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Page Title: Maintenanceand Control of Design Information Summaries
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the design requirements, not the basis for the requirements. Thus, field validation concentrates
almost exclusively on the design requirements. Design basis may be referred to for the resolution of
open items and conflicts between the design requirements and either the physical configuration or the
facility documentation.
Field validation is done on DISs rather than on raw design information for the following reasons: the
design requirements are fully reconstituted, complete, and accurate; sufficient time has been allowed
for reconstituted design requirements to be reflected in the physical configuration and configuration
documents; design basis reconstitution represents an extra validation of the design requirements; the
DIS is a user-friendly compilation of the design requirements, sorted by system and topic and
differentiated by type; and DIS issuance is the final step in overall CM program development. With the
issuance of DIS Revision 1, the facility needs to be confident that the DISs are complete and accurate
and that the CM program basic relationships are established. From this point on, the CM program
focuses primarily on maintaining these relationships.
Field validation does not take the place of initial reconcilement of design requirements, physical
configuration, and configuration documentation. As design requirements are reconstituted, they should
be released and forwarded through the established change control and document control processes.
Open items and discrepancies identified as the reconstituted design requirements are released should
be resolved long before field validation. Field validation is the final check that everything is consistent.
Every DIS should have some degree of field validation. The first several should receive full validation,
similar to a vertical-slice assessment. Reduced-scope field validations may be acceptable for later
DISs if the results of the initial validations are positive. Section 2.5 provides guidance on the
performance of vertical-slice assessments and DIS field validation.
The DR program should establish the DIS maintenance and control procedures. Once the DISs are
complete and the maintenance and control procedures are in place, maintenance and control of the
reconstituted design information are integrated into the normal CM program work activities. The design
requirements element is responsible for establishment and maintenance of the design requirements
and design basis; the document control element, for the control of documents within the CM program.
Typically, the design authority would be assigned ownership of the DISs that are to be controlled in
accordance with CM document control element. Thus, the design authority would ensure both that the
design information is current and accurate and that the DIS is current and accurate.
Maintenance and control are necessary to ensure that the DISs retain their value as a reference tool for
facility activities. Document controls applicable to DISs should be comparable to those for the SAR.
Supporting information, computer software, and other DIS references should also be appropriately
Examples of appropriate controls would include publishing notices of page changes, updating the
databases at the time of such changes, and incorporating the changes annually into the DISs. (if the
number or complexity of outstanding change notices were significant, incorporation into the DISs would
be accelerated.) The DISs should be reviewed and reissued (e.g., every 2 to 5 years on a staggered
schedule, and more often for highly modified and safety-significant DISs) to ensure that they continue to
meet facility needs and do not become obsolete.
Ready availability to users is essential for the DISs. Facilities should consider establishing information
systems featuring centralized information control and user access from convenient terminals. The
most effective information retrieval systems have the following attributes: convenient locations, simple

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