PINGPUnit 1 & Unit 2 MUR 2010

Lessons Learned

Martin CabiroFeedwater System 02/24/2011

MUR Uprate Specifications

MUR Power Uprate from current licensed core power of 1650 MWt to 1677 MWt.

Expected increase of 9 MWe on Unit 1 and Unit 2.

RCS and Safety Related Systems were not impacted by the Uprate due to only ½ Degree F change in Th and Tc values.

MUR impact solely on BOP systems only.

MUR- BOP System Impacts

Installation of Cameron Leading Edge Flow Meter (LEFM) on Unit 1 (1R25) and Unit 2 (2R25) with a power measurement uncertainty of .36%

Parameter 1650 MWTh Unit 1 1677 MWth

Unit 2 1677 MWth

MS Flow 7.12e6 lbm/hr 7.32e6 lbm/hr 7.33e6 lbm/hr

FW Flow 7.18e6 lbm/hr 7.34e6 lbm/hr 7.33e6 lbm/hr

MWe 571/570 MWe 581 MWe 580 MWe

Turbine First Stage Pressure

513/514 psig 526 psig 527 psig

MUR- Power Ascension Monitoring Plan

Pre and Post Monitoring put in place due to industry OE of changes in MS, FW,HD, and Extraction Steam system flow induced vibrations.

PINGP System Engineering Team (15 Engineers) generated to perform Pre and Post Monitoring.

MUR- Pre Monitoring Walk-down

Visual walk-downs performed in Turbine Building and Aux Building.

Target of walk-downs:– Identify existing pre Uprate system vibrations,

oscillations in FW heaters, unusual piping configurations, audible and visual indications of flashing in pipes or tanks, and support or hanger positions.

MUR- Pre Monitoring Walk-down Findings

Examples of Pre Walk-down findings:

MUR- Pre Monitoring Walk-down Findings (cont.)