IEEE 84-2018 pdf free.IEEE Standard Criteria for Independence of Class 1 E Equipment and Circuits.
IEEE Sid 603IM, IEEE Standard Criteria for Safety Systems for Nuclear Power Generating Stations.
IEEE Std 62X1M, IEEE Standard Criteria for the Design. Installation, and Qualification of Raceway Systems for Class IF Circuits for Nuclear Power Generating Stations.
IEEE Std 6901M. IEEE Standard for the Design and Installation of Cable Systems tbr Class IE Circuits in Nuclear Power Generating Stations.
NEM AVE I. Metal Cable Tray Systems.
3. Definitions
For the purposes of this document, the following terms and definitions apply. The IEEE Standards Dictionary Online should be consulted for terms not defined in this clause,
acceptable: Demonstrated to be adequate by the safety analysis of the station.
associated circuits: Non-Class lE circuits that are not physically separated or are not electrically isolated from Class I E circuits by acceptable separation distance, safety class structures, harriers, or isolation devices. Circuits include the interconnecting cabling and the connected loads.
auxiliary supporting features: Systems or components that provide services (such as cooling, lubrication. and energy supply) that are required for the safety system to accomplish its safety functions.
barrier: A device or structure interposed between redundant Class I E equipment or circuits, or between Class I E equipment or circuits and a potential source of damage, to limit damage to Class I E systems to an acceptable level.
beyond-design-basis external cv eDt (KI)BEE): Event initiated by natural phenomena that either exceeds the protections provided by design basis features or involves natural phenomena within the design basis in combination with beyond-design-basis failures leading to an extended loss of ac power an&or loss of ultimate heat sink.
cable in free air: That portion of a cable not routed in either a raceway or an enclosure.
Class IF: The safety 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 are otherwise essential in preventing a significant release of radioactive material to the environment.
current earning circuit: A circuit that uses electrical current through a metallic conductor as the means of transmitting signals or power.
design basis events: Postulated abnormal events used in the design to establish the acceptable performance requirements of the structures. systems. and components,
division: 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.
NOTF—The terms dh’i.cion. train. channd, sc’paralion group. ca/en group, or load group, when used in the context of IEEE Sid 384-2018 are interchangcable
enclosure: An identifiable housing. such as a cubicle. compartment. terminal box. panel, or enclosed raceway, used for electrical equipment or cables.
tiber-optic circuit: An instrumentation circuit that uses light through a fiber-optic cable as the means of transmitting signals. The fiber-optic circuit does not include (hc electrical current carrying components of the intcrtacc devices.
flame retardant: Capable of limiting the propagation of a fire beyond the area of influence of the energy sourcc that initiated the fire.
FLEX: Diverse and flexible mitigation strategies that increase defense-in-depth 11r beyond-design-basis external events BDBEE) to address an extended loss of ac power and loss of normal access to the ultimate heat sink.
independence: The state in which there is no mechanism by which any single design basis event, such as a flood, can cause redundant equipment to be inoperable.
isolation device: A device in a circuit that prevents malfunctions in one section of a circuit from causing unacceptable influences in other sections of the circuit or other circuits.
maximum credible voltage or current transient: That voltage or current transient that may cxist in circuits. as determined by test or analysis. taking into consideration the circuit location, routing, and interconnections combined with failures that the circuits may credibly experience.
racessa: Any channel that is designed and used expressly for supporting or enclosing wires, cable, or bus bars. Raccways consist primarily ot but arc not restricted to. cable trays and conduits.
redundant equipment or system: Equipment or system that duplicates the csscntial function of another piece of equipment or system to the extent that either may perform the required function regardless of the state of operation or failure of the other.IEEE 84 pdf download.