Slovenské elektrárne, a.s. Member of Enel Group

1. Slovenské elektrárne, a.s. Memberof Enel Group

2. Slovenské elektrárne, member of Enel Group Enel world presence Presence in 40 countries Installed capacity 97,300 MW Annual production 294 TWh EBITDA 17.7 Bln € Customers 61 million Employees 75,400 Capex 2012-16 27 Bln € 1 Stock exchange Enel is listed on the Milan stock exchange (~1.36 mlnshareholders). 14 companies of the Group are listed on Milano, Madrid, Mosca, New York stock exchanges and in other Latin American countries 2 Data as of 31.12.2011 (1) Annual production includes 2,6 TWh for closing transaction with ContourGlobal LP for the sale of Maritza stake. (2) Overall shareholders’ profile as of 24 November 2011

3. Slovenské elektrárne The Company • VISION • To be the safest, most reliable, efficient and competitive producer of electricity creating value for our customers, shareholders and employees • PRODUCER • SE produces electricity and heat. It is the largest power generating company in Slovakia and one of the largest in Central and Eastern Europe • MISSION • To achieve the highest levels of safety andperformance throughexcellentexecution,continuous improvement and teamwork • OPERATOR • SE operates 34 hydro, 2 nuclear and 2 thermal power plants, owns directly 4.993 MW of gross capacity and controls 5.739 MW of gross capacity

4. Slovenské elektrárne Nuclear energy - the key building block of SE portfolio • Thermal • Vojany TPP • 880 MW • Nováky TPP • 518 MW • Nuclear • Bohunice NPP 1000 MW • Mochovce MPP • 940 MW • Hydro • 34 HPPs • 2 399 MW • Photovoltaic • 2 MW As of Dec. 2012 Nuclear: Excluding the decommissioned Bohunice V1 units (1&2) which are not owned by SE Thermal: Including 4x110 MW installed off-line capacity at TPP Vojany II Hydro: Including run-of-the-river plant VEGA (746,4 MW) which is operated by SE but owned by Vodohospodarska vystavba; Hydro fleet consist of pumped storage and run-of-the river plants

5. Slovenské elektrárne Key operational Gross Installed Capacity (MW) Gross Production (GWh) 2011 2011 2012 2012 SE share in SK electricity production (%) SE share in SK electricity consumption (%) 2012 2012 Thermal: Both the Nováky and the Vojany TPP co-fire biomass (wooden chips) with a goal to gradually reach the share to 20% in EVO and up to 30% in ENO Hydro: including VEGa

6. Nuclear Safety in SlovenskeElektrarne • WANO PO&C for Corporate Peer Reviews(April 2008) • MONITORING AND OVERSIGHT (CO.2) • ”Both line management monitoring and independent oversight are used to strengthen safety and improve performance. • Nuclear safety is continuouslymonitored by line managers and independent oversight groupsthrough techniques such as self assessments, plant tours and observations, performance indicators and periodic management meetings to review station performance.”

7. Nuclear Oversight in SlovenskeElektrarne An independent off-line function consists of: • Nuclear Oversight (internalunit) • NSAC-Nuclear Safety Advisory Committee (external part of NSO) • International Safety Reviews (WANO, OSART) • (three years programmer for each site + Corporate review)

8. Nuclear Safety Advisory Committee Joint inspection of Endesa- NOS and SE-NSO in EMO NPP. From the left: Francesco de Falco, John Moares, Jozef Zlatňanský, Ignác Pňaček (Chief Operating Officer), Christopher Bakken, Paolo Ruzzini (Chairman of the Board of Directors), Harri Tuomisto, Ignacio Lequerica, János Tóth.

9. Main Focus of NOS independent Reviews • Functional Areas: „Cross-functional“ Areas: • • Organizational Effectiveness•Safety Culture • • Operations • Human Performance • • Maintenance • Self-Evaluation (Learning Organization) • • Engineering Support • Industrial Safety • • Radiological Protection • Plant Status and Configuration Control • • Operating Experience • Work Management • • Chemistry • Equipment Performance and Condition • • Training and Qualification • •Fire Protection • •Emergency Preparedness

10. Nuclear Safety reporting within Enel Group ENEL CEO ENEL ENGINEERING & INNOVATION DIVISION DIRECTOR NSO NSAC Recommendations Subsidiary Senior Management Expectations CorrectiveActions &Performance Reporting NOS OPERATIONS Recommendations Validations Continuous Improvement Observations Assessment

11. Performance Excellence Initiative & Safety • Weekly SafetyMessage • Just Culture Program • Positive Reinforcements • Confidential Reporting One of 3 variable salary part indicators is focused on safety PEX • Critical positions • Critical knowledge

12. Conclusions Safety as a Top Priority in all activities shall be under continuous Independent Assessment and Monitoring with direct access to the highest level in the company Questions ? Comments ?

13. Mobile sources Feed water mobile source for steam generatorsNPP EBO and EMO – 4 fire trucks (one piece/one unit): Objective of project: filling of steam generator, spent fuel pool, reactor cavity and SAM storagetanks Technical details: High pressure pumps: Adjustable water flow up to 30 t/h at a pressure of 6 MPa Adjustable pressure at pump discharge in range 0,6 – 7 MPa Low pressure pumps: Adjustable water flow up to 30 t/h at a pressure of 2 MPa Adjustable pressure at pump discharge in range 0,1 – 4 MPa Auxiliary mobile pumps: to supplement of feedwater from other external sources of water – for example: circulation water from cooling tower pool. Flow rate - minimum 1 200 l / min, pumps driven by petrol engine Tank: 10 000 liters, filled with demineralized water. Fire truck will include pressure tubes (reduction to connection points to emergency feed water pump in EBO and EMO)

14. General Idea – Configuration Matrix Tool A C B PUMPTO BE USED TANKTO BE USED PUMPSFLOODED • Pumps flooded in room A, • BUT tanks are operable and can be used. • It is possible to use pumps located in room B or room C.

15. Configuration Matrix Output – an Example

16. General Idea – Configuration Matrix Tool System #1 Safety Function System #2 System #3 Cliff-Edge Effect #1 Set of computational aids to predict: • Mission times of configurations • Time needed to set up particular configurations HW AM HW AM External Event Cliff-Edge Effect #4 HW AM Safety Functions: Subcriticality Reactor core and Spent fuel pool heat removal Containment integrity HW AM Cliff-Edge Effect #2 Cliff-Edge Effect #3 HW AM DiD Level 3 – DB/BDB Accidents DiD Level 4 – Severe Accidents Time • Database of pre-developed configurations of plant systems capable to provide for specific safety function • Database of valuable SSC data with respect to AM (seismic, flooding and environment robustness, electrical supply,…)

17. Basic Assumptions System #1 Safety Function System #3 System #2 • CMT is developed in compliance with the Level 4 of DiD • - All equipment available at site can be used to provide for specified safety functions Development of minimum subsets of equipment capable of specified safety function provision - Configurations • Configuration Matrix Approach (CMA) is strictly deterministic.

18. Configuration Structure Including Subsystems Reactor FW tank SRHR pump SG PC ESWS HX • Auxiliary system included: • - ESW cooling • - Lubrication • - Compressed air • - … Auxiliary systems included using dedicated set of configurations • Electrical supply dependencies are included

19. How To Identify Configurations?

20. How To Identify Configurations? Based on: • EOPsand other relevant operational procedures • Engineering judgment from available documentation

21. Safety and Non-Safety SSC Cross-Train Configurations Configuration Matrix allows for: • Cross-train configurations of safety SSC • Configuration development using safety and non-safety SSC It is in compliance with the Level 4 of DiD!

22. Main Advantages and Usage of Configuration Matrix EOPs and SAMGs provide only strategies not particular SSC configurations directly linked with safety functions, what CMT does: • All information about SSCs and system dependencies (cooling, electrical supply,…) stored at one place • Direct solutions of setting up particular system and all of its dependent subsystems • Computational aids help to prioritize individual steps in AM strategy Quick assessment of the existence of necessary measures for the provision of safety functions: • Possibility to systematically check for the plant robustness of safety functions provision under user defined IEs • Gradual increase in the severity of IE allows one to search for potential cliff-edge effects

23. Non-standard tests-Test of the filling of spent fuel pool using the water from bubbler condenser water tray Box PG Mobilný zdroj NV T815 CAS-WOMA + prenosné čerpadlá Honda WB 20X  800 m3demivody Miestnosť SHNČ1 SKR

24. Non-standard tests-Test of the filling of spent fuel pool using the water from bubbler condenser water tray Box PG Mobilný zdroj NV T815 CAS-WOMA + prenosné čerpadlá Honda WB 20X  800 m3demivody Miestnosť SHNČ1 SKR

25. Non-standardtests-Test to restore a water supply by mobile source to steam generator

26. Non-standardtests-Test to restore a water supply by mobile source to steam generator

27. Non-standardtests-Test to restore a water supply by mobile source to steam generator

28. Emergency training- supply of water from external sources