Abstract
| Original language | English |
|---|---|
| Article number | 583259 |
| Number of pages | 13 |
| Journal | Science and Technology of Nuclear Installations |
| Volume | 2009 |
| DOIs | |
| Publication status | Published - 2009 |
| MoE publication type | A1 Journal article-refereed |
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An overview of the pressurized thermal shock issue in the context of the NURESIM project. / Lucas, D. (Corresponding Author); Bestion, D.; Bodéle, E.; Coste, P.; Scheuerer, M.; D’Auria, F.; Mazzini, D.; Smith, B.; Tiselj, I.; Martin, A.; Lakehal, D.; Seynhaeve, J.M.; Kyrki-Rajamäki, R.; Ilvonen, Mikko; Macek, J.
In: Science and Technology of Nuclear Installations, Vol. 2009, 583259, 2009.Research output: Contribution to journal › Article › Scientific › peer-review
TY - JOUR
T1 - An overview of the pressurized thermal shock issue in the context of the NURESIM project
AU - Lucas, D.
AU - Bestion, D.
AU - Bodéle, E.
AU - Coste, P.
AU - Scheuerer, M.
AU - D’Auria, F.
AU - Mazzini, D.
AU - Smith, B.
AU - Tiselj, I.
AU - Martin, A.
AU - Lakehal, D.
AU - Seynhaeve, J.M.
AU - Kyrki-Rajamäki, R.
AU - Ilvonen, Mikko
AU - Macek, J.
PY - 2009
Y1 - 2009
N2 - Within the European Integrated Project NURESIM, the simulation of PTS is investigated. Some accident scenarios for Pressurized Water Reactors may cause Emergency Core Coolant injection into the cold leg leading to PTS situations. They imply the formation of temperature gradients in the thick vessel walls with consequent localized stresses and the potential for propagation of possible flaws present in the material. This paper focuses on two-phase conditions that are potentially at the origin of PTS. It summarizes recent advances in the understanding of the two-phase phenomena occurring within the geometric region of the nuclear reactor,that is, the cold leg and the downcomer, where the “PTS fluid-dynamics" is relevant. Available experimental data for validation of two-phase CFD simulation tools are reviewed and the capabilities of such tools to capture each basic phenomenon are discussed. Key conclusions show that several two-phase flow subphenomena are involved and can individually be simulated at least at a qualitative level, but the capability to simulate their interaction and the overall system performance is still limited. In the near term, one may envisage a simplified treatment of two-phase PTS transients by neglecting some effects which are not yet well controlled, leading to slightly conservative predictions.
AB - Within the European Integrated Project NURESIM, the simulation of PTS is investigated. Some accident scenarios for Pressurized Water Reactors may cause Emergency Core Coolant injection into the cold leg leading to PTS situations. They imply the formation of temperature gradients in the thick vessel walls with consequent localized stresses and the potential for propagation of possible flaws present in the material. This paper focuses on two-phase conditions that are potentially at the origin of PTS. It summarizes recent advances in the understanding of the two-phase phenomena occurring within the geometric region of the nuclear reactor,that is, the cold leg and the downcomer, where the “PTS fluid-dynamics" is relevant. Available experimental data for validation of two-phase CFD simulation tools are reviewed and the capabilities of such tools to capture each basic phenomenon are discussed. Key conclusions show that several two-phase flow subphenomena are involved and can individually be simulated at least at a qualitative level, but the capability to simulate their interaction and the overall system performance is still limited. In the near term, one may envisage a simplified treatment of two-phase PTS transients by neglecting some effects which are not yet well controlled, leading to slightly conservative predictions.
U2 - 10.1155/2009/583259
DO - 10.1155/2009/583259
M3 - Article
VL - 2009
JO - Science and Technology of Nuclear Installations
JF - Science and Technology of Nuclear Installations
SN - 1687-6075
M1 - 583259
ER -