Open Phase Condition: Difference between revisions
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Byron Open Phase Condition (OPC) Issue | Byron Open Phase Condition (OPC) Issue | ||
An automatic Reactor [[SCRAM|SCRAM]] at Byron station resulted from a design vulnerability in the 4.16 kV [[Bus|bus]] [[Undervoltage|undervoltage]] protection scheme in that an Open Phase Condition (OPC) resulting in unbalanced three-phase currents (which can and did damage plant equipment) went undetected. | An automatic Reactor [[SCRAM|SCRAM]] at Byron station resulted from a design vulnerability in the 4.16 kV [[Bus|bus]] [[Undervoltage|undervoltage]] protection scheme in that an Open Phase Condition (OPC) resulting in unbalanced three-phase currents (which can and did damage plant equipment) went undetected. | ||
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Latest revision as of 15:39, 11 June 2019
Byron Open Phase condition pertains to an nuclear industry issue regarding a design vulnerability in the 4.16kV bus undervoltage protection scheme in that an Open Phase Condition (OPC) resulting in unbalanced three-phase currents (which can damage plant equipment) went undetected. Byron initiated ENS 47636. INPO generated Level 2 IER L2-12-14 and NRC generated IN 2012-03 and then Bulletin 2012-01. Issue is currently tracked as NEI Open Phase Condition (OPC) Initiative.
Byron Open Phase Condition (OPC) Issue An automatic Reactor SCRAM at Byron station resulted from a design vulnerability in the 4.16 kV bus undervoltage protection scheme in that an Open Phase Condition (OPC) resulting in unbalanced three-phase currents (which can and did damage plant equipment) went undetected.