Numerical analyses of an ex-core fuel incident: Results of the OECD-IAEA Paks Fuel Project

Hózer, Zoltán; Aszódi, Attila; Barnák, M.; Boros, I.; Fogel, Marilyn L.; Guillard, Valia; Csaba, Gyori; Hegyi, György; Horváth, Gábor; Nagy, Imre; Junninen, Pasi; Kobzar, V.; Légrádi, G.; Molnár, Anna; Pietarinen, K.; Perneczky, L.; Makihara, Yoshiaki; Matejovič, Peter; Perez-Feró, Erzsébet; Slonszki, E.; Tóth, István György; Trambauer, K.; Tricot, N.; Trosztel, I.; Verpoorten, J.; Vitanza, C.; Voltchek, A.; Wagner, Kenneth Charles; Zvonarev, Yu.A.

doi:10.1016/j.nucengdes.2009.09.031

Cited by 4 publications

(1 citation statement)

References 4 publications

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“…Furthermore, the accident in Paks NPP (2003) constitutes a noticeable precursor of what happened in the SFP of Fukushima, for example, [24]. Nuclear fuel in a pool went dry causing harmful radioactivity releases to the environment, for example, [25].…”

Section: The "Precursors": Reactor Design Research Regulations Andmentioning

confidence: 99%

The Fukushima Event: The Outline and the Technological Background

D'Auria

Galassi

Pla

et al. 2012

Science and Technology of Nuclear Installations

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The paper deals with the evaluation of the Fukushima-Daiichi Nuclear Power Plant (NPP) accident in Units 1 to 4: an attempt is made to discuss the scenario within a technological framework, considering precursory documented regulations and predictable system performance. An outline is given at first of the NPP layout and of the sequence of major events. Then, plausible time evolutions of relevant quantities in the different Units, is inferred based on results from the application of numerical codes. Scenarios happening in the primary circuit and containment (three Units involved) are distinguished from scenarios in spent fuel pool (four Units involved). Radiological releases to the environment and doses are approximately estimated. The event is originated by a natural catastrophe with almost simultaneous occurrence of earthquake and tsunami. These caused heavy destruction in a region in Japan much wider than the land around the NPP which was affected by the nuclear contamination. Key outcome from the work is the demonstration of strength for nuclear technology; looking at the past, misleading Probabilistic Safety Assessment (PSA) data and inadequacy in licensing processes have been found. Looking into the future keywords are Emergency Rescue Team (ERT), Enhanced Human Performance (EHP), and Robotics in Nuclear Safety and Security (RNSS).

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Section: The "Precursors": Reactor Design Research Regulations Andmentioning

confidence: 99%

The Fukushima Event: The Outline and the Technological Background

D'Auria

Galassi

Pla

et al. 2012

Science and Technology of Nuclear Installations

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Review of experimental database to support nuclear power plant safety analyses in SGTR and LOCA domains

Hózer,

Adorni,

Arkoma

et al. 2023

Annals of Nuclear Energy

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Experimental simulation of the Paks-2 cleaning tank incident through separate effect and integral tests

Hózer¹,

Horváth²,

Kunstár³

et al. 2011

Nuclear Engineering and Design

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Following the ex-core cleaning of VVER type fuel assemblies, a severe fuel damage took place at the Paks NPP. Assemblies with high decay-heat remained without cooling for seven hours. As a common result of high temperature oxidation and final water quenching the assemblies were broken and the fuel rods fragmented.In order to improve the understanding of the phenomena that took place during the Paks-2 incident, several series of separate effect and integral tests have been carried out. The separate effect tests investigated the phenomena related to the upward shift of fuel assemblies, to the role of the spacer grid and the spring in the loss of cladding integrity, and to the importance of high hydrogen content in the vessel's atmosphere on the embrittlement of zirconium. Integral tests were carried out in the CODEX facility to simulate the whole scenario of the incident using electrically heated fuel rods.3

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Numerical analyses of an ex-core fuel incident: Results of the OECD-IAEA Paks Fuel Project

Cited by 4 publications

References 4 publications

The Fukushima Event: The Outline and the Technological Background

The Fukushima Event: The Outline and the Technological Background

Review of experimental database to support nuclear power plant safety analyses in SGTR and LOCA domains

Experimental simulation of the Paks-2 cleaning tank incident through separate effect and integral tests

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