Nondestructive Evaluation of Concrete Material Properties for Nuclear Power Plant Survey: Results in the Laboratory and on the VeRCoRS Mock-Up
Conference: Publication Date: 27 August 2018Testing Method:
Pre-stressed concrete nuclear power plant containment vessel is the third barrier in case of an accident so that quantifying concrete properties with Non Destructive Evaluation (NDE) is a continuing goal. This includes the mapping of the following concrete properties: elastic modulus, water saturation, permeability. In addition, those measurements have to be challenged with the level of stress (which will be modified during an accident) possibly coupled with thermal induced damage.
In the ANR French project “Non Destructive Evaluation of containment nuclear plant structures” (ENDE) eight partners have carried out laboratory and in situ NDE measurements with the aim to compare and combine them to reach quantitative useful information about concrete conditions.
In this paper we present a synthesis of the mains results obtained with classical and non-classical NDE methods. This includes electromagnetic techniques such as radar, capacitive measurements, resistivity measurements and ultrasonic measurements (impact echo, ultrasonic pulse velocity – in reflexion and transmission mode for longitudinal and transverse waves, surface waves, diffuse waves, coda wave interferometry, nonlinear acoustics, etc.).
The laboratory experiments have been conducted on slabs 0.5 m x 0.25 m x 0.12 m, for one concrete mix formulated to be representative of nuclear containment walls, in different conditions:
- sound concrete without any stress for different water saturations,
- heat damage of partially saturated slab (at 80°C, 150°C, 200°C),
- sound concrete under stress (up to 30% of the compressive strength),
- heat damage concrete under stress.
A series of NDE method combinations (using data fusion approach) is performed to solve the problem of multiple sensitivity issues.
This laboratory work is then transposed on the VeRCoRS mock-up which is a 1/3 scaled concrete power plant (a ϕ 16 m x h 30 m cylinder, with 0.40 m thick walls) heavily instrumented (700 sensors, 2 km of fiber optic). In this paper we present results obtained before, during and after a decennial test simulation which consists in increasing the internal pressure with air, maintaining its level to 4 bars during 2 hours and then decreasing back to the atmospheric pressure level.
To conclude industrial and research perspectives are presented.
- Abraham O., Piwakowski B., Villain G., Durand O., 2012, “Non-contact, automated surface wave measurements for the mechanical characterisation of concrete,” Construction and Building Materials, 37, pp 904- 915.
- Abraham O., Legland J.-B., Durand O., Hénault J.-M., Garnier V., 2018, “Non destructive testing of concrete nuclear containment plants with surface wave Lab experiment on decimeter slabs and on the VeRCoRs mock-up ”, AIP Conference Proceedings, QNDE 2017, 1949, 030003, 6p.
- Balayssac J.-P., Laurens S., Arliguie G., Breysse D., Garnier V., Dérobert X., Piwakowski B., 2012, “Description of the general outlines of the French project SENSO – quality assessment and limits of different NDT methods,” Construction and Building Materials, 35, pp 131–138.
- Balayssac J.-P., Duprat F., Villain G. et al., 2016, “Synthesis report of the ANR-EVADEOS project,” available at http://www-lmdc.insa-toulouse.fr/evadeos/accueilevadeos.htm
- Dérobert X., Iaquinta J., Klysz G., Balayssac J.-P., 2008, “Use of capacitive and GPR techniques for nondestructive evaluation of cover concrete,” Non Destructive Testing & Evaluation International Journal ; 41 (1), pp 44-52.
- Garnier V., Piwakowski B., Abraham O., Villain G., Payan C., Cjaix J.-F., 2013, “Acoustical techniques for concrete evaluation: Improvements, comparisons and consistencies,” Construction and Building Materials, 43, pp 598-613.
- Garnier V., Henault J.-M., Hafid H., Verdier J., Chaix J.-F., Abraham O., Larose E., Piwakowski B., Villain G., Sbartai Z.M., Balayssac J.-P. et al., 2016, “Containment Nuclear Plant Structures Evaluation by Non Destructive Testing: Strategy and Results,” TINCE proceedings, Technological Innovations in Nuclear Civil Engineering, Paris, France, 13p.
- Hilloulin B., Zhang Y., Abraham O., Loukili A., Grondin F., Durand O., Tournat V., 2014, “Small crack detection in cementitious materials using nonlinear coda wave modulation”, Non Destructive Testing & Evaluation International Journal, 68, pp 98-104.
- Kaczmarek M., Piwakowski B., Drelich R., 2016, “Non-contact ultrasonic non destructive technique: state of the art and their use in civil engineering,” Journal of Infrastructure Systems, 23 (1).
- Krause M., Milmann B., Mielentz F., Streitcher D., Redmer B., Mayer K. Langennerg K.-J., Schickert M., 2008, “Ultrasonic imaging methods for investigation of post-tensioned concrete structures: a study of interfaces at artificial grouting faults and its verification,” Journal of Nondestructive Evaluation, 27, pp 67-82.
- Quiviger A., Payan C., Chaix J.F., Garnier V., Salin J., 2012, “Effect of the presence and size of a real macrocrack on diffuse ultrasound in concrete," Non Destructive Testing & Evaluation International Journal, 45 (1), pp 128-132.
- Payan C, Ulrich T. J., Le Bas P. Y., Griffa M., Schuetz P., Remillieux M. C., Saleh T. A., 2014, “Probing material nonlinearity at various depths by time reversal mirrors,” Appl. Phys. Lett., 104 (14), 144102.
- Polder R., Andrade C., Elsener B.,Vennesland O., Gulikers J., Weidert R., Raupach M., 2000, “Test methods for on site measurement of resistivity of concrete,” Materials and Structures, 33 (10), pp 603-611.
- Villain G., Le Marrec L., Rakotomanana L., 2011, “Determination of the bulk elastic moduli of various concrete by resonance frequency analysis of slabs submitted to impact echo,” European Journal of Environmental and Civil Engineering, 15 (4), pp 601-617.
- Verdier J., Carcassès M., Ollivier J.-P., 2002, “Modelling of a gas flow measurement - Application to nuclear containment vessels,” Cement and Concrete Research, 32 (8), pp 1331-1340.
- Vu Q.A., Garnier V., Payan C. Chaix J.-F., Lott M., Eiras J., 2016, “Concrete cover characterization using Dynamic Acousto-Elasticity Testing and Rayleigh waves," Construction and Building Materials, 114, pp 87-97.
- Zhang Y., Abraham O., Grondin F., Loukili, A., Tournat V., Le Duff A., Lascoup B., Durand O., 2012, “Study of stress-induced velocity variation in concrete under direct tensile force and monitoring of the damage level by using thermally- compensated coda wave interferometry,” Ultrasonics, 52 (8), pp 038–1045.
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