Surveillance and diagnostics of the beam mode vibrations of the ringhals pwrs

Montalvo Martín, Cristina and Pázsit, Imre and Nylén, Henrik (2012). Surveillance and diagnostics of the beam mode vibrations of the ringhals pwrs. In: "PHYSOR 2012, advances in reactor physics", 15/04/2012 - 20/04/2012, Knoxville, Tennessee (United States). pp. 1-12.

Description

Title: Surveillance and diagnostics of the beam mode vibrations of the ringhals pwrs
Author/s:
  • Montalvo Martín, Cristina
  • Pázsit, Imre
  • Nylén, Henrik
Item Type: Presentation at Congress or Conference (Article)
Event Title: PHYSOR 2012, advances in reactor physics
Event Dates: 15/04/2012 - 20/04/2012
Event Location: Knoxville, Tennessee (United States)
Title of Book: PHYSOR 2012: advances in reactor physics
Date: 2012
Subjects:
Faculty: E.T.S.I. Minas (UPM)
Department: Física Aplicada a los Recursos Naturales [hasta 2014]
Creative Commons Licenses: Recognition - No derivative works - Non commercial

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Abstract

Surveillance of core barrel vibrations has been performed in the Swedish Ringhals PWRs for several years. This surveillance is focused mainly on the pendular motion of the core barrel, which is known as the beam mode. The monitoring of the beam mode has suggested that its amplitude increases along the cycle and decreases after refuelling. In the last 5 years several measurements have been taken in order to understand this behaviour. Besides, a non-linear fitting procedure has been implemented in order to better distinguish the different components of vibration. By using this fitting procedure, two modes of vibration have been identified in the frequency range of the beam mode. Several results coming from the trend analysis performed during these years indicate that one of the modes is due to the core barrel motion itself and the other is due to the individual flow induced vibrations of the fuel elements. In this work, the latest results of this monitoring are presented.

More information

Item ID: 22878
DC Identifier: http://oa.upm.es/22878/
OAI Identifier: oai:oa.upm.es:22878
Official URL: http://meetingsandconferences.com/physor2012/
Deposited by: Memoria Investigacion
Deposited on: 19 Mar 2014 08:08
Last Modified: 22 Sep 2014 11:33
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