ENS 43558

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v t e ENS Event
20:00 Aug 7, 2007
Title	Part 21 - Two Commerical Grade Relays Contained Deficiencies
Event Description	Event: On August 7, 2007, Duke Energy (Duke) completed a reportability determination which concluded that two relays contained deficiencies and were reportable under Part 21. The relays were Commercial Grade Items dedicated by Duke. Following dedication, a bench test performed on August 26, 2004 revealed that relay contacts were not set up properly at the factory. Eight other relays from the same purchase order were acceptable. The relays were Magnecraft Struthers-Dunn part number 219ABAP-115/125D. The Part 21 evaluation in 2004 was terminated based on incorrect guidance in the applicable Duke administrative directive. The directive error was identified March 29, 2007 and a review of prior Part 21 reportability determinations was initiated. The original 2004 problem report on these relays was reopened, leading to this Part 21 report being made at this time. Initial Safety Significance: None. The defective relays were never installed. The intended applications could not have resulted in a significant safety hazard. However, the Duke administrative directive on Part 21 evaluations states that all potential applications where the component might be installed as a substitute must be considered. Duke has concluded that installation in some unspecified application 'could have resulted in a significant safety hazard' and therefore the issue is being reported. Corrective Action(s): In 2004: There were eight (8) additional relays from the same purchase order. These were retested and found acceptable. The two identified defective relays were returned to the manufacturer. The manufacturer concluded that the relay contacts were improperly assembled. They consider this an isolated case. In 2007: The Duke administrative directive on Part 21 evaluations was corrected. Previous Part 21 determinations were reviewed, leading to this report. NRC Resident Inspector was notified of this Part 21 notification by the licensee.

ENS 43558 +/-
Where
Oconee South Carolina (NRC Region 2)
Reporting

10 CFR 21.21
Time - Person (Reporting Time:+38.68 h1.612 days <br />0.23 weeks <br />0.053 months <br />)
Opened:	Randy Todd 10:41 Aug 9, 2007
NRC Officer:	John Mackinnon
Last Updated:	Aug 9, 2007
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v • d • e

v t e Emergency Notification System
Oconee with 10 CFR 21.21, Notification of failure to comply or existence of a defect and its evaluation
WEEKMONTHYEAR2011-01-06T22:02:00 [Table view]
[ENS list for Oconee]

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