Technical-economical study of Czech NPPs Long Term Operation P. Kadečka, J. Žďárek

Nuclear Research Institute Řež plc

Nuclear Research Institute Řež plc

Technical-economical study of Czech NPPs Long Term Operation

P. Kadečka, J. Žďárek

2. 11. 2006

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Nuclear Research Institute Řež plc.

Division of Integrity and Technical Engineering

5. Int. Conf. OKB Gidropress, 2007

Main Goal and NRI Role

• Performance of TE study should enable to define Dukovany NPP life extension optimum and to prepare bases for follow up realization program.

• NRI makes this study in very close cooperation with Dukovany NPP (technical and basic economical part) and CEZ HQ (general economical part).

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Main Goal and NRI Role

Work started at 2004 has two main parts:• Technical, based on:

• IAEA-TECDOC-1309, Cost drivers for the assessment of nuclear power plant life extension

• Economical, based on:• IAEA matrix for NPP economic assessment• CEZ requirements

Two methodologies for both parts of the study were prepared.

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IAEA TECDOC Cost Drivers (1/2)

1. Safety upgrades to meet regulatory requirements

2. Other non-safety and conventional system upgrades

3. Management programs and processes4. Environmental impact assessment5. Maintaining expertise6. Public acceptance7. Radioactive waste & spent fuel management

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IAEA TECDOC Cost Drivers (1/2)

8. Decommissioning

9. Licensing process

10.Operating and maintenance (O&M) review

11.Operating spares and consumables

12.Fuel cycle improvements

13.Overall risk assessment

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Cost of ensuring SC LTO (1/3)

•One of the most important and compliceted element of the study is calculation of cost necessary to ensure NPP‘s structures or components (SC) LTO.

• It is part of drivers 1 and 2.

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Work is done in following steps and results obtained are screened and comented by Dukovany NPP staff:

• Selection of structures or components with high cost of replacement or refurbishment• Determination of term when measure to ensure selected

SC LTO will be necessary to adopt (assuming current service and maintenance of SC)

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• Design of different possible measures (replacement, refurbishment, ageing management, design change, …) and their application optimum schedule which can be used for selected SC (with necessary measures application to enable NPP‘s LTO)

•Determination of designed measures costs

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Management and tools (1/2)

• Work managed by division 300 NRI is done in cooperation with:

• Division 200 (Nuclear Safety)• Division 500 (Energoproject Prague, Czech Design

Authority)• Škoda Research (NRI daughter)• UAM Brno (NRI daughter)• ECC (External company, Economic expertise)

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Management and tools (2/2)

• All results are saved to Microsoft Access database called EDULTO• Database is continually developed in accordance with

requirements from work flow• Database is compatible with Dukovany SC register

(Passport, MNT Graph)• In the future the database will be part of EDU PLIM

database called INFOZ (structure is also NRI product)• Except already mentioned sources also Knowledge

Management System DART , with Dukovany NPP DB is used

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Main form of Dukovany LTO database with component selection

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Form of Dukovany LTO database, containing second step evaluation results

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Form of Dukovany LTO database, Design of

possible measures (1/3)

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OPTIMUD INFOZ

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DART EDU CZ, DB Knowledge Management System

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Other Cost Drivers Evaluation (1/2)

For other cost drivers, analyses are done and if necessary measures are also designed. For instance:

• Safety upgrades to meet regulatory requirements are evaluated on the basis of PSR done by Dukovany LBB

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Other Cost Drivers Evaluation (2/2)

• Management programs and processes are evaluated taking into account results of IAEA SALTO project in which CEZ, NRI and Czech Regulatory Body (SÚJB) are very active

• Licensing process is prepared and evaluated on the base of QA program for LTO. QA program is prepared by Dukovany NPP staff and discussed and agreed with SÚJB.

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Economical Part of Study (1/2)

•Economical part preparation is done by external subcontractor of NRI

• Final calculation will be done by CEZ experts using their tools, procedures and confidential strategies•All will be done in accordance with Czech Rep. laws and CEZ procedures

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Economical Part of Study (2/2)

•NRI finish its work by determination of price for accepted measures

•Also the possible time schedule for measures realization and their interactions are taking into account. For this reason a tool called Big Map of Actions designed by Dukovany staff will be used and updated (new computer application).

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Conclusion

• TE study will be finished in 2007

•On base of CEZ management decision, a preparation of detail realization program is supposed.

Documents

Technical-economical study of Czech NPPs Long Term Operation P. Kadečka, J. Žďárek