LTO safety review completed at Mexico’s Laguna Verde NPP

1 July 2022

An International Atomic Energy Agency (IAEA) Safety Aspects of Long-Term Operation (Salto) team of experts has completed a review of long-term operational safety at the Laguna Verde NPP in Mexico. The Salto follow-up review mission was requested by plant operator Comisión Federal de Electricidad of Mexico (CFE).

The team focused on aspects essential to the safe Long-Term Operation (LTO) at Laguna Verde NPP and reviewed the plant’s implementation of recommendations and suggestions made during an IAEA Salto mission in 2019. The team comprised four experts from Argentina, Bulgaria, Czech Republic and Germany and one IAEA staff member as well as one observer each from Netherlands and from Sweden.

The plant consists of two units, each with a capacity of 2317 MWe boiling water reactors (BWRs). Unit 1 went into commercial operation in 1990 and unit 2 in 1995. CFE has already obtained a licence renewal to extend the operating lifetime of unit 1 from 30 to 60 years. A similar application to extend operation of unit 2 is in process.

“The team observed that the operator is preparing the plant for safe LTO in a timely manner,” said team leader and IAEA Nuclear Safety Officer Martin Marchena. “Following the recommendations made by the Salto team in 2019, the plant has made significant improvements in the area of ageing management and has shown continued commitment to prepare for safe LTO.” The team encouraged plant management to fully address the remaining findings from the 2019 mission.

The team said the plant had:

  • Improved ageing management of mechanical components, civil structures and buildings.
  • Developed and implemented a comprehensive training programme for ageing management.
  • Improved the process for data management in support of long term operation.

Further work is necessary by the plant to:

  • Perform a comprehensive periodic safety review to identify potential safety improvements for LTO.
  • Fully implement a programme to confirm resistance of electrical components to harsh conditions, a so-called equipment qualification programme.

The plant management expressed determination to address the areas identified for improvement and to continue cooperation with the IAEA. The team provided a draft report to plant management and to the regulatory authority who will have an opportunity to make factual comments on the draft. A final report will be submitted to the plant management, the regulator authority – the Comision Nacional de Seguridad Nuclear y Salvaguardias (CNSNS), and the Mexican Government within three months.

Image: The Laguna Verde nuclear power plant in Mexico (photo courtesy of CFE)

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