Definitions - Continued

DOE-STD-1052-93

walkdowns, and management inspections.

3.24 PROBLEM COMPONENT - A component whose past failures have caused a

significant adverse impact on safety system availability, electrical generation, or

maintenance cost.

3.25 RELIABILITY - The probability that a component or system should perform its

functions for a specified period of time when used within established operating

parameters.

3.26 RUN-TO-FAILURE - A maintenance strategy to allow selected components to

operate until failure without performing preventive maintenance on the components.

3.27 SURVEILLANCES - Functional tests of installed components and/or systems to

satisfy technical safety requirements.

3.28 WEAROUT - The normal degradation process that is a function of operating time.

D-6