Author(s)

Pavlin Groudev¹, Emil Kichev², Petya Petrova¹

¹Institute for Nuclear Research and Nuclear Energy, Bulgarian Academy of Sciences, Sofia, Bulgaria.
²Kozloduy NPP, Kozloduy, Bulgaria.

The paper presents a brief summary of the introduction of the term “practical elimination” as prevention of the conditions that could lead to early or large radioactive releases. The concept of “practical elimination” is defined as part of the Defence in Depth (DiD) of Nuclear Power Plant (NPP) in the International Atomic Energy Agency (IAEA) document INSAG-12 in 1999. But, the special attention to it was paid after the accident in Fukushima NPP in 2011. The mechanisms of the containment failure of reactor WWER-1000/V320 are presented. As an example, the summarized design features and preventing and mitigation measures already implemented at Kozloduy NPP to extend the design basis and beyond design basis envelop are presented. Issues related to external steam explosion are underlined for further study.

Practical Elimination, Early Radioactive Release, Large Radioactive Release, WWER-1000/V320, Kozloduy NPP

Groudev, P. , Kichev, E. and Petrova, P. (2018) Discussion on Practical Elimination of Early or Large Releases for WWER-1000/V320. Journal of Power and Energy Engineering, 6, 18-25. doi: 10.4236/jpee.2018.65002.