Post on 06-Apr-2018
National Status on Life Management of NPPs in Finland 2017Meeting of the IAEA TWG-LMNPPFebruary 22-24th 2017 Vienna, Jyrki Kohopää
NUCLEAR POWER IN FINLAND
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• Teollisuuden Voima Oyj, Olkiluoto:
• OL1/2: 2 x BWR 880 MW
• OL3/EPR 1600 MW
• OL4 decision in principle in 2010 (max 1800 MW), extension denied by the Government in 2014.
• Fortum Power and Heat Oy,
• Loviisa:
• Lo1/2: 2 x VVER 502 MW
• Fennovoima Oy, Pyhäjoki:
• FV1 decision in principle in 2010 (max 1800 MW). Change of the reactor type approved in Government 2014, ratification in the Parliament in December 2014.
• Fennovoima submitted a construction license application to the Government at the end of June 2015.
Helsinki
TVO,Olkiluoto
Fortum, Loviisa
Fennovoima,Pyhäjoki
FINLAND
CONFIDENTIAL© Teollisuuden Voima Oyj
TVO – OLKILUOTO
• 37 years electricity production
with a high utilization and low
emmissions
• 17% of the electricity needs in
Finland produced in Olkiluoto
OL1/OL2 licence renewal main issues
• New YVL guides
• Life Time Extension for 20 years (2018-2038)
• Deterministic analysis updating
• Structural analyses
originally many load cases were not calculated
take care of earthquake
fatigue analysis for LTO
4 14.10.2015
OL1/OL2; Top ten modification for new licence
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Fukushima, PSR and ageing management related works:
• diverse reactor level measurement
• new main circulation pumps and
frequent converter
• LATE (forward pumping of high
pressure bleed)
• New EDGs
• ELMA-project (el & automation
component renewal in containment)
• ACIS (high pressure steam driven
pump)
• fire water feed to reactor
• 327 (auxiliary feed water)-bypass line
• fuel pool level measurement
• fire water feed to fuel pools
• diverse RHR
• emergency control room
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OL1/OL2; Modernization project 2016-2018
Reneval of generator
transformer (OL2)
Started, 2015
Renewal of PS electrical
and I&C components
Execution acc. to planned
program
Renewal of
Emergency Diesel
Generators
Started, 2018-2022
Diversification of reactor pressure
vessel level measurement (upper
and lower limit)
Started, delayed to 2017-2019
Renewal of LV-
switchgears
Execution, 2010-2016
Diversification of RHR
Started, 2016-2019
Renewal of HP
preheaters and forward
pumping of HP-bleed
Started, 2017-2018
Renewal of Neutron flux
Monitoring Calibration
system Started, 2016-2017
Renewal of Battery
backed 380/220V AC
System UPS-devices
Started, 2016-2019
Remote control room
Started, 2014-2016
Condenser re-tubing
and ejector replacement
Started, 2017-2018
Replacement of FW spargers
Started, 2017-2018
Renewal of Reactor internal
pumps and their frequency
converters Started, 2016-
2018
HP and LP auxiliary FW
Started, 2017-2018
Repair of RPV safe-end
welds
Started, 2017-2018
CONFIDENTIAL© Teollisuuden Voima Oyj 8
Olkiluoto 3 EPR project has achieved two
major milestones: start of Nuclear Circuit
Cleaning and completion of Full Scope
Simulator testing.
Cold Functional Tests planned for early
summer 2017.
OL3 Operating License Application
submitted 14.4.2016
OL3 STATUS IN 2017
© Teollisuuden Voima Oyj
Complete nuclear waste management on one
island, Olkiluoto
FINAL DISPOSAL FACILITY FOR
SPENT NUCLEAR FUEL
Nuclear facility construction in progress since
December 2016. Posiva’s preparedness
approved by Finnish regulatory body STUK
and Ministry of Economic Affairs and
Employment.
INTERIM STORAGE FOR
SPENT NUCLEAR FUEL
In operation since 1987
FINAL DISPOSAL REPOSITORY FOR
DECOMMISSIONING WASTE
To be built for decommissioning of plant units
OPERATING WASTE
REPOSITORY
In operation since 1992
Final disposal facility around 2120’s
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• Construction of Nuclear facility in progress since December 2016
• Operation license application end of 2020. Start of operation end of 2023.
• Repository capacity is 6500 tU (about 3300 capsules)
• Depth of the tunnel system -400-450 m and the extent is about 2 km²
• Construction and operating time approximately 100 years
• The volume of the cave about 1,5 million.m³
• Tunnel length about 60-70 km
Introduction
• Fortum Power and Heat Oy
• PWR type VVER-440/213
• Commissioning
– Loviisa 1 in February 1977
‒ Loviisa 2 in March 1980
• Licensed until
‒ Loviisa 1 the year 2027
‒ Loviisa 2 the year 2030
• Gross (net) efficiency
– 2 x 526 (502) MW
• Electricity generation 8.33 TWh (2016)
• Load factor 91.1 % (2016)
• Reference unit power (net) of the Loviisa units has increased during plant history from 445 MW to 502 MW (2016).
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Loviisa approach to Long Term Operation
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To reach the goal of 50 (+) operating years it is required
• Safe and reliable production and balanced economy
• Syncronising of outages and large projects
• Integration of life time management with safety improvement goals and actions
• Success in personnel generation exchange, competence management and human performancedevelopment
Background
• Identified challenges
– Overlapping operations are performed separately in several organizations
– Focus is too much on “shutdown fires”
– The prioritization of problems / investment principles are not clearly defined
– Availability risk identification is inadequate
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Awareness of the overall condition and state
of the power plant is limited
Corrective actions
• Develop and implement Loviisa Equipment Reliability Process to:
– Improve organization efficiency
– Allocate resources on the right things
– Provide a better overview of the status and performance of the power plant
– Identify problem areas better and more proactive way
– Prioritize issues with common criteria's
– Provide facts to support decision making
– Develop tools and reports to support daily ER activities
And also fulfill the WANO Peer Review AFI
“Procedures and practices for evaluation and analysis of equipment performance are not
comprehensive and complete”
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1st AP-913 was compared with the existing processes
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• Need to identify SPV
components
• Own classification already
in use
• No need for reclassification.
• Almost all actions in this area
have been made but the work
has been missing a systematic
approach.
• Continuing Improvement
function area was little bit lost
under other work.
• We collect lots of data
• No systematic analyzing,
trending or forecasting.
• No proactive obsolescence
management
• Spare part management
need to improve
• Remaint ® concept in use.
• No necessary need to do
big changes in
maintenance strategy.
• Some small detail
enhancement. Example
quality of maintenance
Feedback.
• Lack of prioritization
• Fault cause evaluation could
be more systematic.
• Obsolescence management.
• Poor station level prioritization
and scheduling.
• LRP/TYP is not in balance
• Identified needs vs. available
resources doesn’t meet
AP-913
Top Level Diagram
Journey into the LOER-process
• From the very beginning it was clear that there is no sense to start directly
implementation of the AP-913.
• The target was
– Identify Loviisa’s strengths vs. AP-913
– Identify AP-913 strengths vs. Loviisa’s processes
– Combines the best practices from both and customize a streamlined process to Loviisa
– Define responsibilities in different stages of process
– Define inputs and outputs of processes
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SPV and Component Criticality Classification
• Component criticality classification is taken in use 2006
– High critical (1)
– Critical (2)
– Low critical (3)
– Run To Failure (4)
• SPV identification was done in 2016
– SPV1 = Reactor trip (24 pcs.)
– SPV2 = Turbine trip (209 pcs.)
– SPV criteria was integrated into the Criticality classification criteria
• SPV1 = High critical
• SPV2 = Critical
– SPV mitigation is in progress
• 82 analyzed 38 actions / 22 completed / 44 no actions needed
• 152 not started yet
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New Loviisa ER organization
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Engineering & Maintenance
Quality
Control
Maintenance
• Mechanical
• Electrical
• I&C
• Civil Structures
Planning
• Mechanical
• Process
• Electrical
• I&C
• Civil Structures
• Work Planning
• Outage Planning
Lifetime Management
• Long Term Planning
• PHC function
• Performance Monitoring
• Prioritization
• Technical support
Ageing management
• AM-programs
(Mech. Elec. I&C
Civil Structures)
• Loads and
transient
Monitoring
• AM-Reporting
Reliability management
• Maintenance
optimization
• Criticality
classification
• Spare parts strategy
• Obsolescence
Management
• Condition
monitoring
development
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Research focus on concrete close to Loviisa reactor
Areas
of
interest
in this
project
• Consists of serpentinite shield and
structural concrete.
• The serpentinite shield close to the
reactor is supposed to withstand the
heat and the neutron fluence.
• The load of the reactor pressure
vessel is supported deeper in the
structural concrete
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Research steps
1. Concrete samples were drilled in the reactor shaft
– accessible location
– based on the documentation the concrete originates in the same concrete mix => representative content.
2. Irradiation of concrete samples in IFE-institute (Kjeller and Halden) in Norway
– Moderate temperature
– Online measurements
– Post-irradiation experiments
3. Interpretation of results
– Degradation mechanisms?
– Threshold fluence?
– Lifetime of the structure?
Specimens irradiated at JEEP-II, Kjeller
• Planned neutron fluences (E > 0.1 MeV) 3.5 x 1018 … 8.1 x 1019 n/cm2,
corresponding to 30 …700 years of equivalent operation time at the Loviisa NPP
– Longer irradiation times to see the damage mechanism
• Temperature was below 100 ºC, some fluctuation of temperature
• Preliminary results:
– Expansion of specimens observed
– Reduction in mechanical properties
– Stronger reduction in the e-modulus than in the stregth
– No “complete degradation”
– Thin sections indicate changes in both the aggregate and the paste
– Further investigations needed, ongoing
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Fennovoima’s Hanhikivi-1 Project
Fennovoima builds a new nuclear power plant at Hanhikivi site, to produce electricity to its shareholders at cost price.
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Fennovoima’s Hanhikivi-1 Project
• AES-2006 plant supplied by Rosatom
• AES-2006 is a 1200MW PWR and the latest development step of VVER plant series
• Finnish Radiation and Nuclear Safety Authority (STUK) stated in its preliminary safety assessmentthat the AES-2006 can bedesigned and constructed in accordance with the Finnish safetyrequirements
• Similar units to AES-2006 areordered worldwide and are alsobeing currently constructed
© Rosatom
Target schedule of the Hanhikivi 1
Preparation Development Construction Operation
2008
EIA
2010
Decision-in-Principle
2011
Site selection
2012
First bids for nuclear
power plant
2013
Rosatom chosen as
the plant supplier
2014
Supplementary
Decision-in-Principle
Preparatory works at
the site starts
2015
Construction License
Application
2017
Construction License
2018
Construction of the plant
begins
Operating License
Fuel loading
2024
Electricity production
begins
60 years of operation
Waste disposal
Decommissioning
2007-2012 2013-2017 2018-2023 2024-
The Finnish Nuclear Power Plant Safety Research Programme
2015-2018
Plant safety and systems
engineering
• Wide interdisciplinary research area
covering the interfaces between
operations and technologies
• Operation of the plant as a whole
• Design principles, defence-in-depth
• Operating processes, information
model and documentation of safety
justification
• Human and organisational
performance, I&C, PRA applications
Reactor safety
• Goal to ensure the
experimental facilities,
computational methods, and
skilled experts
• The methods should enable
independent assessment of the
supplier’s and licensee’s
proposals
• Thermal hydraulics, reactor
dynamics, severe accidents ,
PRA, electric systems etc.
Structural safety and materials
• Safe long term use of the plants
• Research on the management of
the ageing of materials and
structures
• New materials, manufacturing,
and structural engineering
• Life cycle management and
extension
• Probabilistic and deterministic
design (RI-ISI)
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INFRASTRUCTURE FOR NUCLEAR ENERGY R&DVTT - RENEWAL OF HOT CELLS AND LABORATORIES
- The VTT Centre for Nuclear Safety is under commissioning
- To be completed in 2017- Includes new material hot
cells, laboratories for waste management, radio chemistry, filter testing
- The office wing hosts 150 researchers (experimental staff + computer modellers)
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VTT took over the laboratory wing of the new Center for Nuclear Safety, CNS, in
May 2016.
Moving of laboratory equipment into the new facilities is well underway.
Official inauguration event was on September 20th; focus was Finnish clientele.
Installation of hot cells starts in January 2017.
The Centre for Nuclear Safety today