IEEE 1819-2016 pdf free

IEEE 1819-2016 pdf free.IEEE Standard for Risk-Informed Categorization and Treatment of Electrical and Electronic Equipment at Nuclear Power Generating Stations and Other Nuclear Facilities.
reasonable confidence: A level of confidence based on facts, actions, know ledge, experience, and/or observations, which is deemed to be adequate. Reasonable confidence is a lower level of confidence than reasonable assurance.
risk: Probability and consequences of an event, as expressed by the answer to the following three questions: 1)
What can go wrong? 2) How likely is it? and 3) What are the consequences ifit occurs?
Risk-Informed Safety Classification -1 (RISC-1): Eletrical and electronic systems and components (EE-SCs) that are Class 1E and that the risk-informed categorization process determines are significant contributors to plant safety. RISC-1 EESCs perform their safety-significant fiunections consistent with the categorization process, including those safety-signifcant functions that go beyond the functions defined as Class 1E for which credit is taken in the categorization process. (EESCs that are Class IE and perform safety-significant functions.)
Risk-Informed Safety Classification -2 (RISC-2): Electrical and clectronic systems and components (EE-SCs) that are defined as non-Class lE, although the risk-informed categorization process determines that they are significant contributors to plant safety on an individual basis. Though some RISC-2 EESCs may not have existing special treatment requirements, the focus for RISC-2 EESCs is on the safety-significant functions for which credit is taken in the categorization process. (EESCS that are non-Class 1E and perform safety-significant functions.)
Risk-Informed Safety Clasifcation -3 (RISC-3): Electrical and electronic systems and components (EE SCs) that are defined as Class IE, although the risk-informed categorization process determines that they are not significant contributors to plant safety. Special treatment requirements may be reduced for RISC-3 EESCs and replaced with altermate treatments. These altermate treatments are intended to provide reasonable confidence that these EESCS can perform their Class IE functions under design-basis conditions, albeit at a reduced level of assurance compared to the current special treatment requirements. (EESCs that are Class 1E and per- form low safety-significant fiunctions.)
Risk-Informed Safety Clasification -4 (RISC-4): Electrical and electronic systems and components (EE SCs) that are defined as non-Class lE, and that the risk-informed categorization process determines are not significant contributors to plant safety. (EESCs that are non-Class IE and perform low safety-significant functions.)safety significant: Sym: high safety significant.
safety significant function: A function whose degradation or loss could result in a significant adverse efct on defense-in-depth, safety margin, or risk.
sensitivity studies: Analyses that are performed to verify that assumptions or uncertainties made in the probabillistic risk asssment are not masking the importance of an electrical and electronic system and component.
Typical sensitivity studies include increasing human error rates, removal of common cause failures, increasing maintenance unavailabilities, and increasing the failure rate of low safety significant components.IEEE 1819 pdf free download.