Nuclear safety

Nuclear Engineering, Second Cycle
1 ali 2 year
first or second
Course director:

Prof. Dr. Leon Cizelj, Dr. Andrija Volkanovski

Lecturer (contact person):

Assist. Prof. Dr. Damijan Škrk, Prof. Dr. Iztok Tiselj, Assist. Prof. Dr. Ivo Kljenak, Dr. Andrej Prošek, Dr. Andrija Volkanovski, Prof. Dr. Leon Cizelj

Hours per week – 1. or 2. semester:

Enrollment into the program.
Positive result from colloquia or written exam is required to enter the oral exam.

Content (Syllabus outline)

Nuclear safety principles:

-Levels (measures) of nuclear safety, defence-in-depth.
-Definitions and principles of safety, risk, reliability and availability of systems, structures and devices. - Safety systems and their characteristics: redundancy, independence, separation, variety, fail-safe principle and single failure
- Safety analyses. Analyses of transients and accidents. - Basic probability theory and Boolean algebra.
-Databases and probabilistic models. Methods for evaluation of safety and reliability - Theory and Practice: fault tree, event tree, analysis of failure modes and effects.
- Common cause failure - methods and examples. - Safety culture - the organization and management. - Measures of reliability and safety of systems and facilities. Risk criteria. - Risk based decision making. - Periodic safety review. - Quality assurance: program, procedures, implementation.

  1. B. Pershagen: Light Water Reactor Safety; Pergamon Press, Oxford, 1989
  2. H. Kumamoto, E. J. Henley, Probabilistic Risk Assessment and Management for Engineers and Scientists, IEEE Press, 1996
  3. U. S. Nuclear Regulatory Commission: Fault Tree Handbook; NUREG-0492, 1981
  4. Čepin M., B. Mavko, 2002, A Dynamic Fault Tree, Reliability Engineering and System Safety, Vol. 75, No. 1, pp. 83-91.
  5. W. Vesely, J. Dugan, J. Fragola, J. Minarick, J. Railsback, Fault Tree Handbook with Aerospace Applications, National Aeronautics and Space Administration, NASA, 2002
Objectives and competences

Objectives: To know the basics about the security and reliability.
To acquire knowledge about the importance of system reliability for the safe operation of nuclear facilities.
To develop a sense for responsibility of the safe use of energy and to promote a safety culture.

Intended learning outcomes

Knowledge and understanding:
Ability to understand the laws and regulations related to nuclear safety. Ability to apply standard methods, procedures and processes. Commitment to professional ethics.
Using standard methods, procedures and processes in practice.

Own understanding of the theory and experience in practice, critical evaluation of the theoretical principles and practical behavior.
Transferable skills:
To acquire skills for using domestic and foreign literature and other sources, collecting and interpreting data, identification and problem solving, critical analysis, synthesis, writing articles, teamwork.

Learning and teaching methods

Lectures, where students learn about the theory, research seminars, project work, individual work, guided individual study. Some content will be given in the form of e-lessons, using web-based content for distance learning and the use of the current scientific research projects.


2 midterm exams or final written exam
oral exam
grading: 5 (fail), 6-10 (pass) (according to the Statute of UL)

Lecturer's references

Leon Cizelj
1. PROŠEK, Andrej, CIZELJ, Leon. Long-term station blackout accident analyses of a PWR with RELAP5/MOD3.3. Science and Technology of Nuclear Installations, ISSN 1687-6075, 2013, vol. 2013, str. 851987-1- 851987-15, doi: 10.1155/2013/851987 [COBISS-SI-ID 26721319]
2. GARRIDO, Oriol Costa, TISELJ, Iztok, CIZELJ, Leon. Depressurization of vertical pipe with temperature gradient modeled with WAHA code. Science and Technology of Nuclear Installations, ISSN 1687-6075, 2012, vol. 2012, str. 951923-1-951923-9, doi: 10.1155/2012/951923 [COBISS-SI-ID 26147367]
3. CIZELJ, Leon, LESKOVAR, Matjaž, ČEPIN, Marko, MAVKO, Borut. A method for rapid vulnerability assessment of structures loaded by outside blasts. Nuclear Engineering and Design, ISSN 0029-5493. [Print ed.], 2009, vol. 239, no. 9, str. 1641-1646, doi: 10.1016/j.nucengdes.2008.07.004 [COBISS-SI-ID 21920807]

Andrija Volkanovski

  1. VOLKANOVSKI, Andrija, CIZELJ, Leon. Nuclear power plant maintenance optimization with heuristic algorithm. Science and Technology of Nuclear Installations, ISSN 1687-6075, feb. 2014, vol. 2014, str. 458016-1-458016-13, doi: 10.1155/2014/458016 [COBISS-SI-ID 27487527],

  2. VOLKANOVSKI, Andrija, PROŠEK, Andrej. Delayed station blackout event and nuclear safety. Science and Technology of Nuclear Installations, ISSN 1687-6075, 2015, vol. 2015, str. 192601-1- 192601-9, doi: 10.1155/2015/192601.