IEEE 308-2020 pdf free.IEEE Standard Criteria for Class 1E Power Systems for Nuclear Power Generating Stations.
administratise controls: Rules, orders, instructions, procedures, policies, practices, and designations of authority and responsibility.
ausiliary supporting features: Systems or components that provide services (e.g.. cooling, lubrication. energy supply) that are required for the safety systems to accomplish their safety functions.
channel: An arrangement of components and modules required to generate a single protective action signal when required by a generating station condition. A channel loses its identity where single protective action signals are combined.
(lass 1 F.: The safely classification of the electric equipment and systems that are essential to emergency reactor shutdown, containment isolation, reactor-core cooling, and containment and reactor heat removal or that are otherwise essential in preventing significant release of radioactive material to the environment.
NOTE -users of thi. standard are ad ised that “Class I E” is a functional term. Equipment and systems are to be classified Class IF only if they fulfill the functitms listed in the definition. Identification of systems or equipment as Class IE based on anything othct than their function is an improper use of the term and should be avoided.
design basis events: Postulated events used in the design to establish the acceptable performance requirements of the structures, systems. and components.
detectable failures: Failures that can be identified through periodic testing or can be revealed by alarm or anomalous indication. Component failures that are detected at the channel, division, or system level are detectable failures.
NOTE Identifiable hut nondetectable failures are failures identified by analysis that cannot be detected through surveillance testing or cannot be revealed by alarm or anomalous indication.
dhision: The designation applied to a given system or set of components that enables the establishment and maintenance of physical, electrical, and functional independence from other redundant sets of components.
documentation: Any written or pictorial intormation describing, defining, specifting. reporting, or certifying activities, requirements. procedures, or results.
engineered safety features: Features of a unit, other than reactor trip or tatures used only for normal operation, that are provided to prevent, limit, or mitigate the release of radioactie material.
execute features: The electrical and mechanical equipment and interconnections that perform a function, associated directly or indirectly with a safety function, upon receipt of a signal from the sense and command features. The scope of the execute features extends from the sense and command features output to and including the actuated equipment-to-process coupling.IEEE 308 pdf download.