Network of Nuclear Engineering
and Energy Services

Network of Nuclear Engineering and Energy Services (NNEES) represents a global partnership of highly qualified experts in the area of the nuclear safety and energy use and applications.

Its mission is to support a broad range of institutes including the regulatory authorities, nuclear and energy industrial facilities, design, engineering and research organizations and universities and cooperate with them in various scientific and technical projects including the design, construction and engineering services, consultancy, independent review and assessment, education and training and knowledge management.

  • Safety assessment of the nuclear facilities and installations
  • Computer code simulations of nuclear facilities and installations’ transients and accidents conditions
  • Verification and validation of computer codes and computer code models
  • Education and training including the guidance and review of master and PhD thesis
  • Drafting, preparation and independent review of the licensing documentation including the regulations and guides


Network of small- and mid-size companies with competences covering broad spectrum of the energy and nuclear energy services ranging from reactor safety, safety assessment, licensing and regulatory aspects, maintenance and inspection, code development, decommissioning and waste management, I&C, data acquisition, testing and experiments and seismic evaluation.

Members of Network are (in alphabetical order):


Several periodical and ad-hoc trainings are organized by NNEES in close collaboration with its partner company NINE. Trainings are focused on obtaining theoretical knowledge and practical skills necessary to develop, perform and review all elements related to the safety assessment of nuclear facilities and activities. Most recognized experts from nuclear community lecturing at our trainings guarantee the application of the the state-of-the-art methodology and best practices.


  • NRSHOT: March 18-22, 2019, Lucca, Italy

  • SUNBEAM: October 1-12, 2018, Lucca, Italy

  • Zwentendorf Plant walk-Down and Inspectors Hands-On Training: October 8 – 12, 2018, Zwentendorf NPP, Austria

  • MMARS: November 19-23, 2018, Lucca, Italy


In collaboration with its partner company NINE, NNEES acts as a technical and administrative secretariat of the NSAG group – NINE Senior Advisory Group. This group is bringing together senior experts in the area of the nuclear safety to help in our competence building, support our projects and promote our work.

NSAG Mandate:

  • Identification and selection of NSAG priorities and activities on yearly basis
  • Review of NINE activities and projects from business and technical perspectives
  • Advise on company strategic business development and on technical as well as on organizational matters
  • Supporting NINE business development activities
  • Promoting NINE through technical publications and conferences
  • Participation in selected NINE activities such as research projects or scientific and technical publications
  • To support the joint activities of NINE and NINE partners


FONESYS  – Forum and Network of System Thermal-Hydraulic codes in Nuclear Reactor Safety – established in 2010, brings together computer codes developers for discussing envisaged improvements in system thermal hydraulics, promoting cooperation aimed at the code improvements and their application in licensing process and safety analysis.

NNEES serves as a FONESYS secretariat taking care of legal and organizational aspects of the forum.

FONESYS members meet regularly once a year.

Members of FONESYS are (in alphabetical order):


Contact Form:

Contact Informations:

  • NNEES, k.s.

    Zvončín 299

    919 01 Zvončín


  • +421 948 032 931