Glossary cont'd - s1073pt10016

Structures, Systems, and Components (SSCs). Structures are elements that provide support or

enclosure such as buildings, free standing tanks, basins, dikes, and stacks. Systems are collections

of components assembled to perform a function such as piping, cable trays, conduit, or HVAC.

Components are items of equipment such as pumps, valves, relays, or elements of a larger array

such as computer software, lengths of pipe, elbows, or reducers.

Technical Validation. For the design reconstitution program, the process of providing reasonable

assurance that the retrieved design information is reasonable, applicable, and technically

appropriate. This includes determining the appropriateness of analytical methods and technical

assumptions.

Topical Areas. Those topics that involve or affect multiple structures, systems, and components in a

facility. Examples include seismic qualification, fire protection, safe shutdown, environmental

qualification, electrical separation, and nuclear criticality.

Validation. See 'Technical Validation' and "Field Validation.'

Verification. For the design reconstitution program, the process of checking that the retrieved design

information has been completely and accurately translated from the source documents.

Vertical Slice Assessment. A top-down evaluation conducted on a system-by-system basis, that

assesses each program and process related to the system. It reviews system-related information

for consistency, technical adequacy, and completeness; compares design requirements and as-built

information; compares physical configuration to associated documentation through walkdowns;

identifies strengths and weaknesses; and develops recommendations for improvements.

Walkdown. A visual inspection of facility structures, systems, and components to identify the as-found

physical configuration and any discrepancies with currently approved facility documentation.

xiv