Managing Design and License Basis Info Presented By: Sam Melton

Topics of Interest Definitions Tools/Technology Good Practices Changes/Update/Obsolete Info Ease of retrieval Navigation/Cross Reference Innovations Level of Detail Fidelity to Operation Margin

Definitions Design Basis = Inputs, assumptions and methodology by which requirements are derived. License Basis = Information used by the regulator as basis for license application including the regulator’s statement of approval.

DBDs Per NEI guideline Major Systems Maintained (most places) Relatively few changes NOT a source document (most places)

Tool/Techniques Atlas (First Energy and Cooper) Modeled events Identify critical parameter and equipment Changes flagged to all impacted D.B. Models to procedure level

Tool/Techniques (cont) Duke – Safety Analysis Inputs Manual (Database application internally developed) Dominion – Accident Analysis DBD (Database – internally developed)

Good Practices First Energy Tier 1 Calculations TS setpoint deviation System performance analysis Several more Dominion Created a Technical Publication Group using Adobe FrameMaker Update DBD, FSAR, TRM able to hyperlink references. Benefits of having all documents available electronically.