ML082770565

Extended Power Uprate Pre-Application Meeting Slides

ML082770565
Person / Time
Site:	Nine Mile Point
Issue date:	10/27/2008
From:	Richard Guzman Plant Licensing Branch 1
To:
Guzman R
References
Download: ML082770565 (22)

Text

Agenda

• Plant Information

• Power Ascension Testing

• EP'U Modifications

• Ac:hieving NMP2 Licensed EPU Power Level

• TS Instrument Setpoint Impacts

• License Amendment Submittal Format

• Schedule

• Summary 2

Plant Information

• Nirle Mile Point Unit 2

- (jE BWR 5 Operating License in 1986 - 3323 MWt

- lin 1995, uprated to 104.3% OLTP - 3467 MWt IExtended Power Uprate to 120% OLTP - 3988 MWt

• CLTP and EPU rated core flow = 108.5 Mlbm/hr

• CLTP and EPU operating dome pressure = 1035 psia

• CLTP rated main steam flow = 15.002 Mlbm/hr

• EPU rated mai n steam flow = 17.636 Mlbm / hr I~MP2 is licensed to MELLLA and 105% core flow 3

Power Ascension Test Plan Bases

• Bases

- SRP 14.2.1

- GE Topical Report requirements

- Industry experience

• Performance

-- Validate equipment performance

- Utilize tiered and monitored approach to EPU power

• ascension

- Periodic data review by PORC and NRC 4

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Power Ascension Test Plan J'>

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• Mclnaged as an Infrequently Performed Test or Evolution (IPTE) in accordance with station procedures

• IP-rE Manager and Power Ascension Test Director assigned

• Mclnagement Oversight Board reviews

• Start-up testing administrative requirements

- Roles and responsibility development

- Industry benchmarking

- Test plan and implementing test procedure development

- Acceptance criteria and predefined actions to address test anomalies established in procedure

- Power ascension test training

- Just-in-Time briefs 5

Power Ascension Test Plan Details

• Incrernental Approach:

Similar to approach used in other EPUs Baseline data at 90% CLTP and 100% CLTP followed by constant rod line power ascension

- Power ascension rate < 1% / hour

- Plateaus at discrete power levels

- 96 hour0.00111 days <br />0.0267 hours <br />1.587302e-4 weeks <br />3.6528e-5 months <br /> hold at 105% and 110% CLTP

- PORC and NRC reviews at designated plateaus

- Integrated with modification functional testing 6

Maj~Dr Power Ascension Tests Test 90% 100% 102.5% 105% 107.5% 110% 112.5% 115%

of CLTP of CLTP of CLTP of CLTP of CLTP of CLTP of CLTP of CLTP Chemistry X X X X Steam Dryer X X Every 1% Power Vibration Monitoring Steam Dryer Performance X X X X X X X (Moisture Carryover)

Radiation Measurements X X X X Core Performance X X X X X X X X Pressure Regulator X X X X X Feedwater X X X X X Piping Vibration X X Every 1% power Perfornnance Monitoring X X X X X X X X 7

Power Ascension Testing - Steam Dryer

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• Evaluation  !;

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Strain gage limit curves ~

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Collection of vibration data at every 1% increase

- Evaluation each 2.5% power increase

• Monitoring

- MSL strain gages

- MSL accelerometers

- MSL moisture carryover

• Reporting

- Provide data for NRC review at designated plateaus 8 *.

Power Ascension Testing - Steam Dryer

-- i Limit Curves I

• Initial criteria derived utilizing EPU startup CLTP strain gage I data ~I" jf'

,:l Level 1: ,

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• Defined by multiplying the CLTP MSL PSD traces by the ~

square of the minimum alternating stress ratio ~

• If Level 1 is exceeded, immediately reduce power to an  !

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- Level 2:

• Defined by multiplying the CLTP MSL PSD traces by 0.64 of the square of the minimum alternating stress ratio

• If Level 2 is reached or exceeded, power ascension is stopped and a reanalysis of the dryer stress is conducted using the MSL data at the new power level 9

Condensate/Feedwater System Testing

• Major Modified Components

- Replace feedwater pump internals and speed increaser

- Replace heater drain pumps

• Modification Testing

- Pump performance curve validation

- Vibration/temperature monitoring

- System performance monitoring

• Power Ascension Testing

- Level control system setpoint changes

- Maximum feedwater run-out analysis 10

Large Transient Testing

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• Generator Load Reject and MSIV Full Closure Tests i NMP2 has tested large transient events and has documented results

- Gains from large transient testing are minimal and are outweighed by the potential harm large transient testing can cause

- Advanced analytical methods and training facilities accurately and adequately simulate large transient events and system performance

- Unnecessary plant challenge

• NMP will request that these tests be waived for EPU 11

EPU Modifications

• Feedwater System Feedwater pump modifications and speed increaser replacement

- Feedwater motor cable replacement

- Install additional turbine building HVAC area coolers

- Heater drain system modifications

• Steam Systems

- Replace relief valves for 5t h & 6t h point feedwater heaters and scavenging steam piping

- Re-rate 5t h & 6t h point feedwater heaters & MSRs

- High pressure turbine replacement

- Replace LP turbine cross-around piping relief valves

- Replace atmospheric exhaust hood diaphragms 12

EPlJ Modifications

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• ARTS/MELLLA

• Recirculation runback initiation logic

• Instrument modifications / setpoint changes

• Piping vibration monitoring modifications

• Balance of Plant piping support modifications

• Environmental Qualification modifications

• Isophase bus duct cooling modifications

• Mitigation systems (HWC & GEZIP trim replacements)

• Design Basis Reconciliation 13

Achieving NMP2 Licensed EPU Power Level

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• EPU modifications will be completed in 2010 to  ?

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support increase to 120% OLTP

• NMP2 will operate up to 120% OLTP during Cycle 13

• Operational impact of EPU 14

Optimize Operation at 120% OLTP I

• NMP2 is considering

- Jet pump performance improvements

- Recirculation pump adjustable speed drives

- MELLLA+

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T~5 Instrument Setpoint Impacts I

• LSSS-related setpoint changes will address I RIS 2006-17 and TSTF-493  !

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- Basis for Safety Limit determination

• SL-LSSS setpoints not impacted

- Methodology and sample calculations (previously provided)

- Analytical Limits, Allowable Values & LTSP

- Administrative controls

- TS notes as applicable 17

T~; Instrument Setpoint Impacts  :'It'

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• Setpoint methodology

- NRC-approved GEH methodology

- Consistent with CLTR

- Consistent with ARTS-MELLLA amendment

• TS Setpoint Changes

- APRM Flow-Biased STP Scram

- Main Steam High Flow

- Turbine First-Stage Pressure Scram and RPT Bypass 18

EPLJ License Amendment Submittal Common Industry Issues

• No Mixed Core

- Current core is GE14 -no change for EPU

• ECCS NPSH

- Containment overpressure not required to achieve EPU

• Grid Stability

- NYISO Impact Study approved for 120% OLTP

- Grid modifications not required

• Steam Dryer

- BWRVI P methodology applied 19

EPU License Amendment Submittal

• Submittal Content

- License changes

- Power Uprate Safety Analysis Report

• RS-001 format to be used

• Content based on CPPU LTR

- Environmental. report

- Topical area attachments

• Incorporation of Lessons Learned from Previous Industry Submittals 20

NMP2 EPU Timeline 2006 2007 2008 I 2009 I 2010 I 2011 I 2012 co co ....

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o Receive NRC*

• Submit EPU Approval of to NRC MELLLA+

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[J Submit Alternate Source Term to NRC Receive NRC.

Approval of ARTS/MELLLA

• Receive NRC Approval of' Alternate Source Term

• Receive NRC Approval of EPU

• Implement MELLLA+

CYCLE 13 (if pursued)

Start EPU .submit conceptual ARTS/MELLLA phase to NRC Submit terminei. MELLLA+ to

,lA+ will be NRC ursued O:onceptual ) Design

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Summary

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• Power ascension testing plan is consistent with previously approved EPU submittals

• Major modification scope is established

• Setpoint methodologies consistent with industry guidance and NMP2 ARTS/MELLLA amendment

• Major EPU industry issues have been addressed

• Submittal will be consistent with RS-001 guidance and CLTR

• NMP2 prepared to submit in December 2008 22