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Article Dans Une Revue (Article De Synthèse) Wear Année : 2001

The influence of water flow on the impact/sliding wear and oxidation of PWR control rods specimens

Résumé

Some mechanical components of PWR nuclear power plants can be sensitive to wear damage resulting from contacts with their supports or guides due to flow-induced vibrations. It is particularly the case of the control rods (rod cluster control assemblies (RCCAs)) and RCC guide tubes inside the reactor pressure vessel. In order to improve our knowledge about the wear behavior of such components, an extensive research program has been conducted during these past years by CEA and EDF including numerous wear tests performed on specific wear simulators. Within the framework of this program, the influence of the water flow on the wear process and damage has been studied on such components. Several wear tests have been conducted on specimens by EDF and CEA using the wear simulators ERABLE 1&2 (EDF) and SYRACUSE 1&2 (CEA) developed by Atomic Energy of Canada Limited (AECL). These simulators are operating in experimental conditions close to the PWR primary system (temperature, pressure, oxygen content, etc.). Both types of simulators are very similar except the water flow which is present only in the EDF machines. Several water flow rates have been taken into account in this program. Complementary to the tests, some extensive non destructive and destructive examinations of the specimens have been performed including the determination of the wear volumes using weights, three-dimensional (3D) profilometry and metallurgical examinations of the surfaces. The results obtained by CEA and EDF are compared and analyzed. The influence of the water flow on the behavior of the specimens is clearly shown, particularly on the dynamic behavior of the system and on the oxidation of the specimens. The effect on the wear pattern seems to be less significant even though the wear volumes are different.

Dates et versions

hal-04501609 , version 1 (12-03-2024)

Identifiants

Citer

A. Lina, D. Moinereau, Xavier Delaune, C. Phalippou, B. Reynier, et al.. The influence of water flow on the impact/sliding wear and oxidation of PWR control rods specimens. Wear, 2001, 251 (1-12), pp.839-852. ⟨10.1016/S0043-1648(01)00740-2⟩. ⟨hal-04501609⟩
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