ENS 40223

v t e ENS Event
07:00 Oct 4, 2003
Title	Defects and Noncompliance Report
Event Description	GE Nuclear Energy provided information concerning a reportable condition on the stability Option III Period Based Detection Algorithm (PBDA) for the Oscillation Power Range Monitor (OPRM) installed at the affected Licensee plants listed below. The basic component with the defect is specification of the allowable values for the adjustable period confirmation variables in the PBDA used in Stability Option III. The defect is that certain values of period tolerance and conditioning filter cutoff frequency within the previously specified acceptable range could produce sufficient successive confirmation count resets such that Safety Limit Minimum Critical Power Ratio (SLMCPR) protection might not be provided for all anticipated reactor instabilities. This condition does not produce a substantial safety hazard and there is no threat of fuel failure. However, because the condition could contribute to exceeding the SLMCPR, it is a reportable condition. List of Affected Plants: Clinton Brunswick 1 & 2 Nine Mile Point 2 Fermi 2 Columbia Dresden 2 & 3 LaSalle 1 & 2 Limerick 1 & 2 Peach Bottom 2 & 3 Quad Cities 1 & 2 Perry 1 Susquehanna 1 & 2 Hope Creek Hatch 1 & 2 Browns Ferry 2 & 3

ENS 40223 +/-
Where
Ge Nuclear Energy San Jose, California (NRC Region 4)
License number:	Various
Organization:	Ge Nuclear Energy
Reporting

10 CFR 21.21
Time - Person (Reporting Time:+11.45 h0.477 days <br />0.0682 weeks <br />0.0157 months <br />)
Opened:	Jason Post 18:27 Oct 4, 2003
NRC Officer:	Jeff Rotton
Last Updated:	Oct 4, 2003
40223 - NRC Website
v • d • e

v t e Emergency Notification System
Ge Nuclear Energy with 10 CFR 21.21, Notification of failure to comply or existence of a defect and its evaluation
WEEKMONTHYEAR2003-10-04T07:00:00 [Table view]
[ENS list for Ge Nuclear Energy]

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