IEEE 338-2012 pdf free.IEEE Standard for Criteria for the Periodic Surveillance Testing of Nuclear Power Generating Station Safety Systems.
For the purposes of this document, thc following terms and definitions apply. The IEEE Standards 1)kiionwr: G!os.cari of Terms and Definition.s should be consulted for terms not defined in this clause.
channel: An arrangement of components and modules as required lo generate a single protective action signal whcn required by a generating station condition. A channcl loses its idcntity whcrc single protcctivc action signals are combined.
channel calibration: The adjustment of channel output such that it responds. with acceptable range and accuracy, to known values of the parameter that the channel measures, and the pcrformancc of a functional test.
channel check: The qualitativc assessment, by observation, of channel behavior during operation. This determination includes, where possiblc, comparison of the channel indication and status to other indications or status derived from independent instrument channels measuring the same parameter.
failure: The termination of the ability of an item to perform a required function.
functional test: A test to determine the ability of a component or system to perform an intended purpose or safety function.
go/no-go: A set of terms (in colloquial usage) referring to the condition or state of operability of a unit that can only have two parameters: (A) go, functioning properly; or B) no-go. not functioning properly.
limiting condition for operation (LCO): The lowest functional capability or performance level of equipment required for safe operation of the facility.
overlap testing: Overlap testing consists of channel, train, or load group verification by performing individual tests on the various components and subsystems of the channel, train, or load group. The individual component and subsystem tests check common parts of adjacent subsystems. such that the entire channel, train, or load group is veritied by testing of individual components or subsystems and by repetitive testing of common parts of adjacent subsystems.
safety function: A process or condition (for example, emergency negative reactivity insertion, post- accident heat removal, emergency core cooling, post-accident radioactivity removal, and containment isolation) essential to maintaining plant parameters within acceptable limits established for a design basis event.
safeti group: A given minimal set of interconnected components, modules, and equipment that accomplishes a safety function.
safety system: A system that is relied on to remain functional during and following design basis events to ensure (A) the integrity of the reactor coolant pressure boundary; (B) the capability to shutdown the reactor and maintain it in a safe shutdown condition; or (C) the capability to prevent or mitigate the consequences of accidents that could result in potential otisite exposures comparable with regulatory limits.
suricillance: The determination of the state or condition of a system or subsystem.IEEE 338 pdf download.