ENS 43701

v t e ENS Event
07:00 Aug 13, 2007
Title	Part 21 Report - Areva Minimum Critical Power Ratio
Event Description	The licensee provided the following information via facsimile: The defect is in the calculation of steady-state core Minimum Critical Power Ratio (MCPR) by the core monitoring system when the SPCB critical power correlation is used for ATRIUM-10 fuel. Specifically, the defect is in the additive constants, a parameter used by the SPCB critical power calculation and based on test data." AREVA notified the affected plants. Affected Plants: Browns Ferry, Units 2 & 3 Columbia Grand Gulf LaSalle, Units 1 & 2 River Bend Susquehanna, Units 1 & 2

ENS 43701 +/-
Where
Areva Np Inc. Richland, Washington (NRC Region 4)
Organization:	Areva Np Inc.
Reporting

10 CFR 21.21
Time - Person (Reporting Time:+1352.5 h56.354 days <br />8.051 weeks <br />1.853 months <br />)
Opened:	Jerald Holm 15:30 Oct 8, 2007
NRC Officer:	Mark Abramovitz
Last Updated:	Oct 8, 2007
43701 - NRC Website
v • d • e

v t e Emergency Notification System
Areva Np Inc. with 10 CFR 21.21, Notification of failure to comply or existence of a defect and its evaluation
WEEKMONTHYEAR2007-08-13T07:00:00 [Table view]
[ENS list for Areva Np Inc.]

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