Three-dimensional Containment Accident Analysis using different approaches in Almaraz NPP

Bocanegra Melián, Rafael and Jiménez Varas, Gonzalo and Goñi, Zuriñe and Fernández Cosials, Kevin and Barreira Pereira, Pilar and Rey Peinado, Luis and Posada Barral, Jose María and Martínez-Murillo Méndez, Juan Carlos (2016). Three-dimensional Containment Accident Analysis using different approaches in Almaraz NPP. In: "42ª Reunión Anual de la Sociedad Nuclear Española", 28-30 septiembre 2016, Santander (España). pp. 1-8.

Description

Title: Three-dimensional Containment Accident Analysis using different approaches in Almaraz NPP
Author/s:
  • Bocanegra Melián, Rafael
  • Jiménez Varas, Gonzalo
  • Goñi, Zuriñe
  • Fernández Cosials, Kevin
  • Barreira Pereira, Pilar
  • Rey Peinado, Luis
  • Posada Barral, Jose María
  • Martínez-Murillo Méndez, Juan Carlos
Item Type: Presentation at Congress or Conference (Article)
Event Title: 42ª Reunión Anual de la Sociedad Nuclear Española
Event Dates: 28-30 septiembre 2016
Event Location: Santander (España)
Title of Book: Ponencias de la 42ª Reunión Anual de la Sociedad Nuclear Española
Date: September 2016
Subjects:
Faculty: E.T.S.I. Industriales (UPM)
Department: Ingeniería Energética
Creative Commons Licenses: Recognition - No derivative works - Non commercial

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Abstract

Containment Design Basis Accident analysis are usually performed using lumped-parameters models as this kind of models do not require high computational resources. Moreover, they offer overall good results of average pressure and temperature evolution. However, in order to perform a detailed local analysis, a thermal-hydraulic behavior study of every containment room may be necessary. To achieve this goal, a more detailed containment 3D model is imperative for capturing the local phenomena which occurs during a mass and energy release accident. During the last years in the collaborative project between the UPM and CNAT, several Almaraz NPP containment 3D models have been developed. The most precise one, called Detailed Integral Model, is able to obtain results with a very high resolution. However, this approach requires also high computational resources. For this reason two new models, called Multi-Zone Models, were developed with a coarser nodalization and therefore a lower computational requirement is needed. In this paper, the new modeling approach is described. A LBLOCA has been simulated in the Multi-Zone Model and it has been compared with the results obtained from the Detailed Integral Model. After analyzing the results, it can be concluded that the thermal-hydraulic evolutions are similar although the local variables differ in some cases. Taking into account the differences between models, a criteria in the use of the different approaches described has been stated depending on the analysis objective.

More information

Item ID: 47623
DC Identifier: http://oa.upm.es/47623/
OAI Identifier: oai:oa.upm.es:47623
Official URL: https://www.sne.es/es/agenda/actividades-organizadas-por-la-sne/la-42-reunion-anual-sociedad-nuclear-espanola
Deposited by: Memoria Investigacion
Deposited on: 01 Sep 2017 07:14
Last Modified: 05 Sep 2017 10:52
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