Major modifications are major structural, system, and component repairs or replacements, or the installation of new systems. In general, these modifications will require the same type of inspections and performance testing as is applied during original plant construction. This inspection procedure addresses the licensee's program for implementing four phases of plant modifications. Installation of modifications are to be controlled in accordance with established work packages which are reviewed and approved prior to use. Installation Testing .
Installation testing includes preliminary tests, inspections, and preparation activities.
Preoperational Testing . Preoperational testing is conducted to demonstrate the capability of structures, systems, and components to meet performance requirements of design criteria. Startup Testing . Startup testing is conducted with the reactor critical or with significant fission power to confirm design bases and to demonstrate, to the degree practical, that integrated systems will operate in accordance with structure, system, and component design criteria. Startup testing demonstrates that the plant, as modified, is capable of responding to anticipated transients and postulated accidents as specified in the Safety Analysis Report.