eprintid: 15313
rev_number: 18
eprint_status: archive
userid: 1903
dir: disk0/00/01/53/13
datestamp: 2013-06-21 10:59:02
lastmod: 2014-09-22 11:07:33
status_changed: 2013-06-21 15:44:15
type: article
metadata_visibility: show
item_issues_count: 0
creators_name: Blázquez, Juan
creators_name: Vallejo, I.
creators_name: García-Berrocal Sánchez, Agustin
creators_name: Balbás Antón, Miguel
title: Control rod drop surveillance using two friction coefficients
ispublished: pub
subjects: fisica
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.
date: 2011-11
date_type: published
publisher: American Nuclear Society
official_url: http://www.ans.org/store/j_13302
full_text_status: restricted
publication: Nuclear Technology
volume: 176
number: 2
pagerange: 284-289
institution: Minas
department: Fisica5
refereed: TRUE
issn: 0029-5450
rights: by-nc-nd
citation:   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.    
document_url: https://oa.upm.es/15313/1/INVE_MEM_2011_123596.pdf