Long Term Operation

  • Europe's leading LTO expert
  • IAEA accepted LTO, SSG-48, IGALL SR82
  • Revalidation of TLAA's

Long Term Operation in a nutshell

Are you preparing to extend the operation time of your nuclear power plant? Do you need help in setting up or modifying your license? As operations manager, you face a lot of challenges. With our knowledge of LTO, we can assist you on long term operation.


More information about Long Term Operation?

Frederic Blom
Clustermanager Nuclear Compliance & Projects

Challenges in long term operation (LTO)

How to organize and structure your LTO project, to achieve acceptance of the regulator?

Which time limited ageing analysis (TLAAs) need to be revalidated?


How to perform Ageing Management Review and create Ageing Management Programs?

Long Term Operation

How do we increase the lifetime?

To continue operating safely, our team of experts uses multiple analyses, as well as in-house developed software. Your nuclear power plant is assessed using:

  • Ageing Management Review for LTO
  • Identification and Revalidation of TLAAs
  • Demonstration of fatigue
  • LEAF fatigue monitoring software

TULIP approach in Long Term Operation

NRG has developed TULIP for Long Term Operation demonstration of nuclear power plants. TULIP entails:

  • IAEA accepted LTO (SSG-48, IGALL SR82)
  • Scoping and screening
  • Ageing management review
  • Revalidation of TLAAs
  • Applicable to diverse designs of nuclear power plants

We have successfully performed several LTO projects, using our TULIP approach. Read our reference cases for more information!

Long Term Operation

Long Term Operation for EPZ/Borssele and Ringhals

NRG helped EPZ / Borssele and Ringhals to set up and go through a long term operation process. IAEA safety guideline 57 has been used as a basis for EPZ / Borssele in the Netherlands.

The experience gained during the process in Borssele was then applied at Ringhals in Sweden. Read more on how both processes led to regulator approval. 

We work closely together as true partners. Besides sound expertise, NRG also offers extensive knowledge on what is going on internationally. - André de Jong, Team leader engineering EPZ / Borssele

Customers we've worked with

As Europe's largest independent long term operation consultant for Generation II nuclear power plants, we have worked on the most challenging Long Term Operation projects. What have we achieved?

  • 20+ years lifetime extension for EPZ/Borssele
  • Lifetime extension for Ringhals NPP
  • Lifetime extension for Oskarshamn
  • Licence renewal for Atucha NPP
  • Licence preparation for Olkiluoto NPP
Long Term Operation

More information about LTO?

Contact our LTO team

Frederic Blom
Manager Nuclear Compliance & Projects
T. +31 (0)6 13102730
M. blom@nrg.eu