000021494 001__ 21494
000021494 005__ 20170522124357.0
000021494 04107 $$aeng
000021494 046__ $$k2017-05-15
000021494 100__ $$aZeman, V.
000021494 24500 $$aFRICTION FORCES AND FRETTING WEAR IN REACTOR CORE BARREL COUPLINGS

000021494 24630 $$n23.$$pEngineering Mechanics 2017
000021494 260__ $$bBrno University of Technology, Institute of Solid Mechanics, Mechatronics and Biomechanics, Brno
000021494 506__ $$arestricted
000021494 520__ $$2eng$$aThe couplings key-groove between the lower part of core barrel and reactor pressure vessel in the nuclear VVER-type reactors show small assembling side clearances. Due to fretting wear the potential for increasing of the clearances exist. Reactor vibrations, caused by coolant pressure pulsations generated by main circulation pumps, produce impulse contact forces in the above mentioned couplings. These forces are used for calculation of friction forces in the slipping contact surfaces between the key and the groove and for their fretting wear prediction. Increasing of the clearances leads to decreasing of some reactor frequencies. Their changes present good tool for the interpretation of diagnostic measurements. The computational method with numerical results applied on VVER1000 type reactor is shown.

000021494 540__ $$aText je chráněný podle autorského zákona č. 121/2000 Sb.
000021494 653__ $$aNonlinear vibration, Nuclear reactor, Friction forces, Fretting wear.

000021494 7112_ $$aEngineering Mechanics 2017$$cSvratka, CZ$$d2017-05-15 / 2017-05-18$$gEM2017
000021494 720__ $$aZeman, V.$$iHlaváč, Z.
000021494 8560_ $$ffischerc@itam.cas.cz
000021494 8564_ $$s1006101$$uhttps://invenio.itam.cas.cz/record/21494/files/1118.pdf$$yOriginal version of the author's contribution in proceedings, page 1118, section DYN.
000021494 962__ $$r21225
000021494 980__ $$aPAPER