License Renewal at Paks NPP License Renewal at Paks NPP Project Technical Tasks Project Technical Tasks Sándor RÁTKAI, LR project technical head, PAKS NPP Telephone: 75/508576, fax: 75/507036 E-mail address: [email protected]1 st Hungarian-Ukrainian Joint Conference on „Safety-Reliability and Risk of Engineering Plants and Components” Miskolc, Bay Z. Institute; 11 th April, 2006.
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License Renewal at Paks NPP Project Technical Tasks Project Technical Tasks Sándor RÁTKAI, LR project technical head, PAKS NPP Telephone: 75/508576, fax:
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License Renewal at Paks NPPLicense Renewal at Paks NPP Project Technical TasksProject Technical Tasks
Sándor RÁTKAI, LR project technical head, PAKS NPPTelephone: 75/508576, fax: 75/507036E-mail address: [email protected]
1st Hungarian-Ukrainian Joint Conference on„Safety-Reliability and Risk of Engineering Plants and Components”
Miskolc, Bay Z. Institute; 11th April, 2006.
Why can we speak about LR?Why can we speak about LR?
World tendency
Feasible in the sense of safety and technical aspects
Good business
Decision of the owner
Society support
Political support
Existing regulation
Why to extend the operational lifetime?Why to extend the operational lifetime?
Hungarian electricity supply - present situation and perspectives
– Environmental aspects: Kyoto obligations – it is possible only if nuclear is considered
– Security of supply – considering available sources and reliable markets to control the import dependence
– Competitiveness of the economy – reliable and cheap electric energy is required
Hungarian electricity productionHungarian electricity production
Nuclear
39%
coal
24,8%
oil, gas
34,7%
water
0,6%
Today: Well balanced system, the Kyoto targets could be met
Diversity of the system ensured according to•sources•technologies•import market10% system capacity reserve exists
Total domestic consumption 2004: 41 118 GWh
Total domestic production 2004: 33 708 GWh
Needs for newNeeds for new capacitiescapacities
nuclear
coal
hydrocarbon
renewablesimport
new plants
0
1 000
2 000
3 000
4 000
5 000
6 000
7 000
8 000
9 000
10 000
11 000
12 000
2005 2010 2015 2020
peak demandpeak demand
Construction of 6000 MW capacity is needed between 2005 and 2020
(to replace the old capacities and cover the increasing needs).
Renewable production in 2004: 884 GWh state support: 16.495 MFt 5,95 Ft/kWh
RegulationRegulation
Activities for the sake of LRActivities for the sake of LR -- LTO -- LTO
Environmental Licensing
1.
Feasibility study
2.
Technical tasks
3.LR „program” making
4. Authority
review
5.
Demonstration of commitment
2008. 2011. 2012.
IMPLEMENTATION
1. Operation due to LAR
2. Reconstruction, upgrading
2000.
Nuclear Licensing(Making of LR application report)
6.License application
document
7. Au
tho
rity revew
NEW Issue of the
license
Project Plan
1. TLAAs 2. Ageing
Project Plan
1. TLAAs 2. Ageing
2010.
2009. 1. unit2002.
1 2
1
2
REVIEW OF THE PROJECT TASKSREVIEW OF THE PROJECT TASKSNo. Tasks of the project 1. Determination of the scope of the license renewal and
methodology 2. Overall review of the current ageing management
practise 3. Solving the currently known unresolved issues
( from feasibility study) 4. Time Limited Ageing Assessment (TLAA) 5. Other TLAA tasks 6. Currently known ageing management measures 7. Introduction of the new maintenance rules: evaluation,
methodological task, development of programs 8. Finalisation of the programs for equipment qualification
+ methodology development 9. Condition maintaining activities (making reconstruction
plans) 10. Elaboration of the measures derived from the
comprehensive review of the current ageing management programs
11. Activities to obtain the nuclear safety licence-in-principle 12. PR activities 13. Implementation of the reconstruction and investment
plan 14. Finalisation of the EQ (deficiencies) 15. Fulfilment of the new maintenance rules (effectiveness)
Review and assessment of the AMPReview and assessment of the AMP
• To demonstrate for the extended operational lifetime that:– The safety and ageing analysis remain valid and could be projected to
the end of intended operational lifetime;– The effects of ageing on the intended function(s) will be adequately
managed;– There is a procedure to deal with unexpected ageing mechanisms that
can surface later in the years.
• In many cases, the plants existing ageing management programmes can be credited as acceptable programmes for LTO. For the remaining cases, either the plants existing programme can be augmented to satisfy the attributes listed above or new programmes should be initiated.
TLAA ReviewTLAA Review
Time Limited Ageing AnalysisTime Limited Ageing Analysis
TLAA are defined as those licensee calculations and analyses (qualifications) that satisfy the following:– Involve systems, structures, and components within the scope
of license renewal;– Consider the effects of ageing;– Involve time-limited assumptions defined by the current
operating term, for example, 30 years;– Were determined to be relevant in making a safety
determination;– Involve conclusions or provide the basis for conclusions
related to the capability of the system, structure, and component to perform its intended functions; and
– Are contained or incorporated by reference in the current licensing basis (in the FSAR).
PROJECT TASKS--PROJECT TASKS-- TLAAsTLAAs1. Embrittlement of Reactor Pressure Vessel
Main Passive/ActiveMain Passive/Active VVER 440/213 ComponentsVVER 440/213 Components
REACTOR/Ppressure vessel
CR drive/ACR drive housing/P
Steam Generator/P
MCP shaft/AMCP pump/A
MCP housing/P
MGV shaft./AMGV motor/A
MGV housing/P
PRESSURIZER/P
Primary piping/P
heater patron /PCable/P
Tasks:
1. Strengths calculations (& embrittlement) (ASME I, III, XI);2. Review of overpressure protection ;3. Fatigue calculations (50+10 years, power up rating: 108%,
thermal stratifications);4. Determination of fatigue monitoring places and
parameters;5. Summary document for FSAR
Deadline: Mid of 2007.
Check of the design against ASME BPVC code Check of the design against ASME BPVC code requirements for selected SSCsrequirements for selected SSCs
Political supportPolitical support
On 21th November, 2005 the Hungarian Parliament has approved a resolution (votes with 339 Yes, 4 No, 8 Abstention):1) To initiate activities of preparing for establishment of radioactive
waste repository for low and medium level of radioactive waste,2) Extension of the operational life time of PAKS NPP
The resolution reads as follows:
“Under Act CXVI of 1996 on Atomic Energy, Article 7, Section (2) the Parliament approves, preliminarily and in principle to initiate activities of preparing for the establishment of a radioactive waste repository for low and medium level waste in the administrative area of Bátaapáti, in the region of Bátaapáti (Üveghuta), in a territory which was previously qualified suitable from geological point of view.
The Parliament takes note of the information on the extension of the operational life-time of Paks Nuclear Power Plant, as a solution necessary for the long-time and safe provision of the country with electric energy.”