HECLA experiments on interaction between metallic melt and hematite-containing concrete

Tuomo Sevón (Corresponding Author), Tuomo Kinnunen, Jouko Virta, Stefan Holmström, Tommi Kekki, Ilona Lindholm

Research output: Contribution to journalArticleScientificpeer-review

15 Citations (Scopus)

Abstract

In a hypothetical severe accident in a nuclear power plant, molten materials may come into contact with concrete, causing concrete ablation. In five HECLA experiments the interaction between metallic melt and concrete was investigated by pouring molten stainless steel at almost 1800 °C into cylindrical concrete crucibles. The tests were transient, i.e. no decay heat simulation was used. The main objective was to test the behavior of the FeSi concrete, containing hematite (Fe2O3) and siliceous aggregates. This special concrete type is used as a sacrificial layer in the Olkiluoto 3 EPR reactor pit, and very scarce experimental data is available about its behavior at high temperatures.

It is concluded that no clear differences between the ablation of FeSi concrete and ordinary siliceous concrete were observed. The ablation depths were small, 25 mm at maximum. No dramatic effects, such as cracking of large pieces of concrete due to the thermal shock, took place. An important side result of the test series was gaining knowledge of the properties of the special concrete type. Chemical analyses were conducted and mechanical properties were measured.
Original languageEnglish
Pages (from-to)3586-3593
Number of pages8
JournalNuclear Engineering and Design
Volume240
Issue number10
DOIs
Publication statusPublished - 2010
MoE publication typeA1 Journal article-refereed
Event4th International Topical Meeting on High Temperature Reactor Technology - Washington, United States
Duration: 21 Sep 20081 Oct 2008

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Hematite
hematite
melt
Concretes
ablation
experiment
Experiments
interactions
Ablation
electron spin resonance
nuclear power plant
accident
Molten materials
mechanical property
steel
ferric oxide
pouring
thermal shock
nuclear power plants
Stainless Steel

Cite this

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abstract = "In a hypothetical severe accident in a nuclear power plant, molten materials may come into contact with concrete, causing concrete ablation. In five HECLA experiments the interaction between metallic melt and concrete was investigated by pouring molten stainless steel at almost 1800 °C into cylindrical concrete crucibles. The tests were transient, i.e. no decay heat simulation was used. The main objective was to test the behavior of the FeSi concrete, containing hematite (Fe2O3) and siliceous aggregates. This special concrete type is used as a sacrificial layer in the Olkiluoto 3 EPR reactor pit, and very scarce experimental data is available about its behavior at high temperatures.It is concluded that no clear differences between the ablation of FeSi concrete and ordinary siliceous concrete were observed. The ablation depths were small, 25 mm at maximum. No dramatic effects, such as cracking of large pieces of concrete due to the thermal shock, took place. An important side result of the test series was gaining knowledge of the properties of the special concrete type. Chemical analyses were conducted and mechanical properties were measured.",
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HECLA experiments on interaction between metallic melt and hematite-containing concrete. / Sevón, Tuomo (Corresponding Author); Kinnunen, Tuomo; Virta, Jouko; Holmström, Stefan; Kekki, Tommi; Lindholm, Ilona.

In: Nuclear Engineering and Design, Vol. 240, No. 10, 2010, p. 3586-3593.

Research output: Contribution to journalArticleScientificpeer-review

TY - JOUR

T1 - HECLA experiments on interaction between metallic melt and hematite-containing concrete

AU - Sevón, Tuomo

AU - Kinnunen, Tuomo

AU - Virta, Jouko

AU - Holmström, Stefan

AU - Kekki, Tommi

AU - Lindholm, Ilona

PY - 2010

Y1 - 2010

N2 - In a hypothetical severe accident in a nuclear power plant, molten materials may come into contact with concrete, causing concrete ablation. In five HECLA experiments the interaction between metallic melt and concrete was investigated by pouring molten stainless steel at almost 1800 °C into cylindrical concrete crucibles. The tests were transient, i.e. no decay heat simulation was used. The main objective was to test the behavior of the FeSi concrete, containing hematite (Fe2O3) and siliceous aggregates. This special concrete type is used as a sacrificial layer in the Olkiluoto 3 EPR reactor pit, and very scarce experimental data is available about its behavior at high temperatures.It is concluded that no clear differences between the ablation of FeSi concrete and ordinary siliceous concrete were observed. The ablation depths were small, 25 mm at maximum. No dramatic effects, such as cracking of large pieces of concrete due to the thermal shock, took place. An important side result of the test series was gaining knowledge of the properties of the special concrete type. Chemical analyses were conducted and mechanical properties were measured.

AB - In a hypothetical severe accident in a nuclear power plant, molten materials may come into contact with concrete, causing concrete ablation. In five HECLA experiments the interaction between metallic melt and concrete was investigated by pouring molten stainless steel at almost 1800 °C into cylindrical concrete crucibles. The tests were transient, i.e. no decay heat simulation was used. The main objective was to test the behavior of the FeSi concrete, containing hematite (Fe2O3) and siliceous aggregates. This special concrete type is used as a sacrificial layer in the Olkiluoto 3 EPR reactor pit, and very scarce experimental data is available about its behavior at high temperatures.It is concluded that no clear differences between the ablation of FeSi concrete and ordinary siliceous concrete were observed. The ablation depths were small, 25 mm at maximum. No dramatic effects, such as cracking of large pieces of concrete due to the thermal shock, took place. An important side result of the test series was gaining knowledge of the properties of the special concrete type. Chemical analyses were conducted and mechanical properties were measured.

U2 - 10.1016/j.nucengdes.2010.04.039

DO - 10.1016/j.nucengdes.2010.04.039

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EP - 3593

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SN - 0029-5493

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ER -