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Nuclear Assets Management

Nuclear Assets Management

Our nuclear policy sets out that the safety and protection of workers, the public and the environment is an absolute priority and serves as the basis of our Nuclear Assets Management strategy.

In order to fulfil this policy and ensure transparency in the management of our nuclear activities, at Endesa, we have drawn up the following document:

Endesa's Nuclear Activities

Endesa has an interest in Nuclear Power Plant Operations in Spain through its shareholdings in following units: Ascó I (100%), Ascó II (85%), Vandellós (72%), Almaraz 1 & 2 (36,021%) and Trillo (1%, through Nuclenor). The first five are PWR designed by Westinghouse and Trillo is PWR designed by KWU. Overall installed nuclear capacity of Endesa is 3.686 MWe, representing 47,1% of the total installed nuclear power in Spain.

These plants are operated by Joint Venture Subsidiaries: Asociación Nuclear Ascó Vandellós II (ANAV - www.anav.com) and Centrales Nucleares Almaraz Trillo (CNAT - www.cnat.es), which are also the license holders of the respective power plants. 

Endesa exercises the governance on these assets through its role as Administrator in the respective operating companies: ANAV and CNAT and is verified, in the case of Ascó and Vandellós II, through independent Nuclear Oversight monitoring, depending of the Endesa Nuclear General Manager.

Therefore as Administrator, Endesa looks to these organizations to have adopted and implemented appropriate policies and procedures, which are consistent with Endesa Nuclear Policy. 

Ascó I 1.032,5 Asociación Nuclear Ascó-Vandellós II, A.I.E. (ANAV) 100%
Ascó II 1.027,2 Asociación Nuclear Ascó-Vandellós II, A.I.E. (ANAV) 85%
Vandellós II 1.087,1 Asociación Nuclear Ascó-Vandellós II, A.I.E. (ANAV) 72%
Almaraz I 1.049,4 Centrales nucleares Almaraz-Trillo, A.I.E. (CNAT) 36%
Almaraz II 1.044,5 Centrales nucleares Almaraz-Trillo, A.I.E. (CNAT) 36%
Trillo 1.066 Centrales nucleares Almaraz-Trillo, A.I.E. (CNAT) 1%

Participation in Nuclear Industry Organizations 

Endesa encourages membership in nuclear industry international organizations, aiming working together with worldwide utilities and institutions to achieve mutual support, exchange of information and emulation of international best practices.

Endesa subsidiary nuclear organizations are members of or participates in several international organizations devoted to strive for Excellence in the operation of nuclear power plants:

  • WANO, World Association of Nuclear Operators
  • NEI, Nuclear Energy Institute (through UNESA)
  • EPRI, Electric Power Research Institute (through UNESA)
  • Proprietary Groups of Westinghouse and GE

Endesa's Nuclear Policy

The Board of Directors of Endesa S.A. approved the Endesa Nuclear Policy on February 1, 2011, which is fully incorporated in the documents and in the practice of the nuclear facilities.This policy is summarized in the following statement:

"Through its investments in nuclear technologies, Endesa publicly commits itself as shareholder to ensure that its nuclear facilities adopt a clear nuclear safety policy and are operated with overriding priority to nuclear safety, the protection of nuclear workers, the general public and the environment from risk of harm.

The policy in respect of nuclear safety is to encourage excellence in all plant activities and to go beyond compliance with applicable laws and regulations and to adopt management approaches embodying the principles of Continuous Improvement and Risk Management.

Endesa will ensure to the full extent of its powers as a shareholder that even the relevant nuclear organizations where Endesa has a minority participation have adopted and published suitable policies for nuclear and environmental safety, radioactive waste management and the physical security of nuclear assets.

Endesa commits to provide sufficient resources to implement the safety policy. Endesa also commits to a cooperation policy on safety in the nuclear industry worldwide."

For the effective implementation of its nuclear policy, Endesa has established the following principles:

1. Recognize safety as top priority, using an integrated and consistent approach to all aspects of management to ensure the safe operation of the plants, the physical protection of the facilities and the protection of workers, the public and the environment.

2. Promote safety culture at all levels of the organization during all the stages of plant lifetime, which includes identifying and assessing hazards, and minimizing risks, encouraging questioning attitude, prioritizing prudent decisions and fostering an environment in which individuals feel free for raising problems and concerns.

3. Promote excellence in the operation, setting expectations that go beyond compliance and encouraging the exchange of experiences within global nuclear industry, the emulation of best practices, the systematic and timely use of operating experience and the use of human error reduction tools, aiming to achieve an event free operation and preventing unplanned plant shutdowns.

4.Maintain an excellent material condition at the facilities ensuring that Design Basis standards are met, through proper maintenance programs, systems health monitoring, and also anticipating and managing timely the ageing mechanisms and obsolescence.

5. Arrange facilities and human resources needed to ensure sufficient response capabilities to address crisis and emergency situations derived from internal and external events, including extreme situations to respond in an exemplary manner  to prevent/minimize any harmful impacts on workers, public, and environment.  

6. Keep radiation exposure of workers as low as reasonably achievable (ALARA), establishing effective preventive measures to ensure a wide margin with respect to the prescribed limits and stressing the responsibility of each individual with regard to the healthy application of radiation protection principles.

7. Ensure that generation of radioactive liquid and gaseous effluents is properly planned and controlled, minimizing the radiological impact on the environment and amply complying with regulatory limits.

8.Reduce the volume of radioactive waste generated during plant lifetime, including decommissioning waste, to the minimum reasonably practicable and establish the necessary provisions to comply with regulatory and contractual obligations regarding spent fuel management and decommissioning, facilitating the successive management stages while meeting the safety and radiation protection principles.

9.Develop a Human Resources policy that guarantees the preservation of the critical knowledge needed for the safe and efficient operation of the plants and apply a systematic approach to manage training programs of staff and contractors.

10. Maintain an Integrated Management System (IMS) consistent with the strategy, policies and objectives of the Organization and linking the different phases of the continuous improvement cycle: planning medium and long term; identifying needs, establishing priorities and allocating resources; executing through core processes, enabling processes and support processes; evaluating through self-assessment and independent evaluation, whether internal or external; and finally defining corrective actions to fix deficiencies and deviations with respect to standards and objectives. Identification and assessment of hazards, as well as management and minimization of risks are performed systematically by thorough deterministic and probabilistic methods, and are embedded in the Integrated Management System at all stages during the lifecycle of the facilities. Prevention of problems, full troubleshooting, follow-up and rectification are ensured by the IMS.

11. Ensure that Endesa Nuclear Policy and the principles that support it are consistently applied to contractors and suppliers, establishing the adequate supervision.

12. Maintain an internal communication policy that is rigorous, transparent and timely, aiming to strengthen confidence and alignment of the staff with the expectations and objectives of the organization. Maintain also an effective public communication policy, establishing and maintaining open lines of communication with external stakeholders and ensuring the integrity and transparency of the information.

13. Ensure the provision of human and material resources to implement effectively all aforementioned principles.

This approach is fully aligned to Endesa´s Sustainability Policy and Human Rights Policy, based on the commitment to promote labour practices that reject forced or compulsory labour and child labour, and that foster respect for diversity and non-discrimination, freedom of association and collective bargaining, just and favorable working conditions and ensure health and safety in the workplace; while also the commitment to respecting the rights of the communities, the zero tolerance of corruption and confidentiality and right to privacy of its stakeholders. This Human Rights Policy, approved by the Board of Directors on 23 June 2013, is based on the United Nations framework on Business and Human Rights, and therefore Endesa has developed a due diligence process throughout the whole value chain, including its nuclear activity.

Additionally, in those nuclear power plants where Endesa has a controlling interest, Endesa maintains an independent oversight structure to monitor safe operation of the plants, comprising a high-level committee composed of international experts and a team of permanent oversight assessors on site.

Management Systems

The management of the nuclear assets in which we hold an interest is focussed on integrating the management of nuclear and radioactive safety, occupational risk prevention, the environment, physical protection, quality and economic aspects to ensure the protection of people and the environment.

For more information:

Documents to download

Nuclear Safety Management System

PDF (0.69MB) Download

Risk management and safety assessment: Defence in Depth

PDF (0.57MB) Download

Radiological protection of workers, public and environment

PDF (0.37MB) Download

Security Management

PDF (0.27MB) Download

Radioactive waste management and decommissioning

PDF (0.41MB) Download

Nuclear Indicators

Pursuant to the FTSE4Good Criteria for Nuclear Power, the following indicators are included:


  • Automatic unscheduled downtime
  • Accidents 
  • Exposure to radiation

Waste generation:

  • Medium and low activity waste
  • Spent fuel
  • Dismantling and associated risks

Complete information about our nuclear indicators is provided in the following document:

Documents to download

Nuclear Performance Indicators

PDF (0.55MB) Download

Our projects about nuclear assets management

Continue reading about our commitment

Sustainability Indexes

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