ML082770565
| 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 rated main steam flow = 15.002 Mlbm/hr
- EPU rated main 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'>
- 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
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 Limit Curves I
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,:l Level 1:
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square of the minimum alternating stress ratio
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- If Level 1 is exceeded, immediately reduce power to an acceptable level
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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 It, i:n
- 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
EPU Modifications
- Feedwater motor cable replacement
- Install additional turbine building HVAC area coolers
- Heater drain system modifications
- Steam Systems
- Replace relief valves for 5th & 6th point feedwater heaters and scavenging steam piping
- Re-rate 5th & 6th point feedwater heaters & MSRs
- High pressure turbine replacement
- Replace LP turbine cross-around piping relief valves
- Replace atmospheric exhaust hood diaphragms 12
I EPlJ Modifications
- 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 o?
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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+
16
T~5 Instrument Setpoint Impacts
- LSSS-related setpoint changes will address I
I RIS 2006-17 and TSTF-493
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- Basis for Safety Limit determination
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- SL-LSSS setpoints not impacted
- Methodology and sample calculations (previously provided)
- Analytical Limits, Allowable Values & LTSP
- Administrative controls
- TS notes as applicable 17
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- 'It' T~; Instrument Setpoint Impacts
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- Setpoint methodology
- NRC-approved GEH methodology
- Consistent with CLTR
- Consistent with ARTS-MELLLA amendment
- TS Setpoint Changes
- 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
- Containment overpressure not required to achieve EPU
- Grid modifications not required
- Steam Dryer BWRVIP 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 to co co o
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111 QI 111 111 iii 111 u.
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Receive NRC**
Submit EPU Approval of MELLLA+
o to NRC (if pursued)
Submit 0 Alternate Source Term to Receive NRC NRC Receive NRC Approval of' Receive NRC.
Approval of Approval of Alternate Source Implement
[J EPU ARTS/MELLLA Term MELLLA+
(if pursued)
Start EPU
.submit CYCLE 13 conceptual ARTS/MELLLA phase to NRC Submit terminei.
MELLLA+ to
,lA+ will be NRC ursued O:onceptual
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Design
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Summary
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it:
- 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