Prairie Island Junk

306, 282

Why is xcel stock price off a huge almost 3% today?  I don't think its related to PI? 

Unit 2 also shut down in June for repairs after a turbine trip caused by low oil pressure.

Rework? 

What grand nuclear power plant overhaul did Excel bungle recently? 

Work wraps up on Prairie Island Unit 2

By Red Wing Newsroom on Dec 9, 2015 at 12:00 p.m.

News Red Wing,Minnesota 55066 http://www.republican-eagle.com/sites/all/themes/republicaneagle_theme/images/social_default_image.png

Red Wing Newsroom

Republican Eagle http://www.republican-eagle.com

Work wraps up on Prairie Island Unit 2

Red Wing Minnesota 2760 North Service Drive / P.O. Box 15 55066

The 29th refueling outage of Unit 2 at Prairie Island nuclear plant was completed Dec. 6, Xcel Energy announced Tuesday. More than 1,000 contractors and employees replaced about a third of the fuel in the reactor, as well as replaced its main electrical generator and step-up transformer — work only possible when the unit is offline. 

Knowing these guys another oil pipe cracked and oil began leaking on hot piping or oil soaked insulation. The crack wasn't big enough to trip the turbine...

LER 15-003-00

On June 7, 2015, Unit 2 Turbine Bearing Oil Pressure was normal at approximately 19 psig. At approximately 05:00, the Unit 2 Turbine Bearing Oil Pressure started to decrease. The Unit 2 Turbine Bearing Oil Pressure decreased at an increasing rate until at 07:35 oil pressure sharply decreased from approximately 17.7 psi to a level that required a turbine trip (trip setpoint is 6 psi). Unit 2 Turbine Bearing Oil Pressure quickly recovered from a low point as indicated on Emergency Response Computer System (ERCS) of 4.3 psi at 07:36:19 to above 16 psi at 07:36:21. Turbine Bearing Oil Pressure was able to be maintained by the Turning Gear Oil Pump while the turbine was on turning gear at a nominal pressure of 21 psi. The Unit 2 Turbine was removed from the turning gear at 00:30 on June 8, 2015. The oil system was shut down a short time thereafter. Oil was drained from the Unit 2 Turbine Oil Reservoir on June 8, 2015 at 06:00. As a result of the investigation, the site identified a circumferential crack on a welded joint upstream of check valve 2T0-303 on June 8, 2015 at18:23. (Corrective Action Program (CAP) Action Request (AR) 1482236). The weld was repaired by Work Order 524416-06 on June 10, 2015. 

These guys have been continuously a problem plant for many years and decades. They are always in the reports.

Power Reactor	Event Number: 51609
Facility: PRAIRIE ISLAND Region: 3 State: MN Unit: [ ] [2] [ ] RX Type: [1] W-2-LP,[2] W-2-LP NRC Notified By: WAYNE SEXSON HQ OPS Officer: DONG HWA PARK	Notification Date: 12/17/2015 Notification Time: 14:33 [ET] Event Date: 12/17/2015 Event Time: 13:18 [CST] Last Update Date: 12/17/2015
Emergency Class: UNUSUAL EVENT 10 CFR Section: 50.72(a) (1) (i) - EMERGENCY DECLARED 50.72(b)(2)(iv)(B) - RPS ACTUATION - CRITICAL 50.72(b)(3)(iv)(A) - VALID SPECIF SYS ACTUATION	Person (Organization): NICK VALOS (R3DO) ALLEN HOWE (NRR) JEFFERY GRANT (IRD) BILL DEAN (NRR) DARRELL ROBERTS (R3 D)

Unit	SCRAM Code	RX CRIT	Initial PWR	Initial RX Mode	Current PWR	Current RX Mode
2	A/R	Y	100	Power Operation	0	Hot Standby

Event Text

UNUSUAL EVENT DECLARED DUE TO FIRE ALARM IN CONTAINMENT NOT VERIFIED WITHIN 15 MINUTES "Unusual Event HU2.1 declared at 1318 [CST]. A fire alarm was received in unit 2 containment at 1307 [CST]. Due to the location of the alarm, personnel were unable to verify the status within 15 minutes. At 1343 [CST], the fire alarm in containment cleared. This alarm came in shortly after a unit 2 reactor trip. The reactor trip was due to a turbine trip. Decay heat removal is via forced circulation with aux feed and steam dumps providing secondary cooling. Offsite power remains available." The reactor trip was uncomplicated and all control rods inserted. 25B feedwater heater relief valve lifted and has reseated. No offsite assistance was requested. The licensee has notified the NRC Resident Inspector. State and local authorities were notified. * * * UPDATE ON 12/17/2015 AT 1734 EST FROM TOM HOLT TO DONG PARK * * * "The licensee terminated the NOUE [Notification of Unusual Event] at 1450 CST. The basis for the termination was determination that there was no smoke or fire in the Unit 2 containment observed during containment entry. "NRC Resident Inspectors were notified. State and local governments were notified. The health and safety of the public was not at risk." Notified the R3DO (Valos), NRR EO (Morris), IRD (Grant), DHS SWO, FEMA Ops enter, and NICC Watch Officer. E-mailed FEMA NWC and Nuclear SSA.