ENS Event | |
|---|---|
21:21 Oct 29, 2010 | |
| Title | Degraded Condition - 71% Through Wall Indication On Reactor Recirc Nozzle |
| Event Description | Information from a Phased Array UT [Ultrasonic Testing] examination of RRA-F002A indicates that a linear indication 6.5" long and a maximum depth of 71 % through wall extent (ID [Inner Diameter] connected) exists. The Phased Array UT examination of RRA-F002A was performed as part of scheduled outage activities.
TRM [Technical Requirements Manual] LCO [Limiting Condition for Operation] 3.7.3 for Structural Integrity, Condition B has been entered for the Recirc nozzle/piping. This event is being reported as a degraded condition pursuant to 10CFR50.72(b)(3)(ii)(A) based on the fact that the indications result in a material defect in the primary coolant system which cannot be found acceptable under ASME Section XI, IWB-3600, 'Analytical Evaluation of Flaws' or ASME Section XI, Table IWB-3410-1, 'Acceptance Standards.' The licensee informed the NRC Resident Inspector. |
| Where | |
|---|---|
Duane Arnold  Iowa (NRC Region 3) | |
| Reporting | |
| 10 CFR 50.72(b)(3)(ii)(A), Seriously Degraded | |
| LER: | 05000331/LER-2010-004 |
| Time - Person (Reporting Time:+-0.37 h-0.0154 days <br />-0.0022 weeks <br />-5.06826e-4 months <br />) | |
| Opened: | Dick Fowler 20:59 Oct 29, 2010 |
| NRC Officer: | Dong Park |
| Last Updated: | Oct 29, 2010 |
| 46379 - NRC Website
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WEEKMONTHYEARENS 463792010-10-29T21:21:00029 October 2010 21:21:00
[Table view]10 CFR 50.72(b)(3)(ii)(A), Seriously Degraded Degraded Condition - 71% Through Wall Indication on Reactor Recirc Nozzle ENS 431722007-02-19T06:00:00019 February 2007 06:00:00 10 CFR 50.72(b)(3)(ii)(A), Seriously Degraded Degraded Condition - 30% Through Wall Indication on Reactor Recirc Nozzle ENS 431182007-01-24T15:55:00024 January 2007 15:55:00 10 CFR 50.72(b)(3)(v)(D), Loss of Safety Function - Mitigate the Consequences of an Accident, 10 CFR 50.72(b)(3)(ii)(A), Seriously Degraded Missing Pipe Clamp Bolt Found on High Pressure Coolant Injection (Hpci) System 2010-10-29T21:21:00 | |