Control rod drop surveillance using two friction coefficients

Blázquez, Juan and Vallejo, I. and García-Berrocal Sánchez, Agustin and Balbás Antón, Miguel (2011). Control rod drop surveillance using two friction coefficients. "Nuclear Technology", v. 176 (n. 2); pp. 284-289. ISSN 0029-5450.

Description

Title: Control rod drop surveillance using two friction coefficients
Author/s:
  • Blázquez, Juan
  • Vallejo, I.
  • García-Berrocal Sánchez, Agustin
  • Balbás Antón, Miguel
Item Type: Article
Título de Revista/Publicación: Nuclear Technology
Date: November 2011
ISSN: 0029-5450
Volume: 176
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

In the case of large burnup, a control rod (CR) guide tube in the pressurized water reactor of a commercial nuclear power plant might bend. As a consequence, a CR drop experiment may indicate an event of a CR partially inserted and whether the CR should be deemed inoperable. Early prevention of such an event can be achieved by measuring two friction coefficients: the hydraulic coefficient and the sliding coefficient. The hydraulic coefficient hardly changes, so that the curvature of the guide tube can only be detected thanks to a variation of the sliding coefficient. A simple model for the CR drop is established and validated with CR drop experiments. If tmx denotes the instant of CR maximum velocity, a linear relationship between (tmx)_2 and the sliding coefficient is found.

More information

Item ID: 15313
DC Identifier: http://oa.upm.es/15313/
OAI Identifier: oai:oa.upm.es:15313
Official URL: http://www.ans.org/store/j_13302
Deposited by: Memoria Investigacion
Deposited on: 21 Jun 2013 10:59
Last Modified: 22 Sep 2014 11:07
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