Radiation damage evaluation on concrete within a facility for Selective Production of Exotic Species (SPES Project), Italy

Pomaro, B.; Salomoni, Valentina; Gramegna, F.; Prete, G.; Majorana, C. E.

doi:10.1016/j.jhazmat.2011.07.079

Cited by 28 publications

(28 citation statements)

References 15 publications

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“…This model succeeds the current PLM process and aims to contribute to the material basis or material potential evaluation for integrity of reinforced concrete structures during PLM. However, radiation impact on the structural performance is not addressed through this model and is a major concern (Pomaro et al 2011;Salomoni et al 2014;. Therefore, this study focuses on material strength, while similar approaches focused on the damage in CBS walls (Pomaro et al 2011;Salomoni et al 2014).…”

Section: Introductionmentioning

confidence: 99%

“…However, radiation impact on the structural performance is not addressed through this model and is a major concern (Pomaro et al 2011;Salomoni et al 2014;. Therefore, this study focuses on material strength, while similar approaches focused on the damage in CBS walls (Pomaro et al 2011;Salomoni et al 2014). The proposed model is used for evaluating the decommissioned plant Japan Power Demonstration Reactor (JPDR).…”

Section: Introductionmentioning

confidence: 99%

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A Numerical Model for Concrete Strength Change under Neutron and Gamma-ray Irradiation

Maruyama

Haba²,

Sato

et al. 2016

ACT

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For performance evaluation of existing reinforced concrete members under irradiation conditions, a numerical code called "DEVICE" (Damage EValuation for Irradiated ConcretE), which takes into account the heat, moisture, and radiation transport coupled with cement hydration, is proposed. This code is composed of the established computational cement-based material (CCBM) model and the one-dimensional deterministic transport Sn code "ANISN". In the proposed model, temperature-dependent irradiation-induced expansion of aggregate minerals and resultant strength deterioration of concrete are introduced. Currently, the knowledge and modeling of irradiation-induced expansion of aggregate mineral is limited only for α-quartz. DEVICE was used for evaluating the strength distribution of the decommissioned plant Japan Power Demonstration Reactor (JPDR). Compressive strength distribution in a concrete biological shielding (CBS) wall of the JPDR was obtained by core sampling, and the compressive loading test results were compared with the calculation results. This comparison proved the practicality potential of DEVICE to predict the concrete strength distribution in a CBS. In addition, concrete strength change and its distribution in a CBS of an anonymous two-loop pressurized water reactor was simulated by DEVICE. The contributing factors for the change in the distribution of concrete strength at the inner surface of the CBS are discussed. Furthermore, the ways of integrity evaluation other than the existing allowable fast neutron fluence method are proposed and discussed as follows: 1) mineral composition-based allowable fast neutron fluence; 2) strength prediction at the inner surface based on the expansion of mineral composition of aggregates and the lower limit curve of the ratio of compressive strength of the specimen after irradiation (Fc) to that of the reference specimen (Fco) as a function of concrete expansion; and 3) direct numerical calculation for seismic performance by considering irradiation-induced volume expansion and degradation of concrete.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

A Numerical Model for Concrete Strength Change under Neutron and Gamma-ray Irradiation

Maruyama

Haba²,

Sato

et al. 2016

ACT

View full text Add to dashboard Cite

show abstract

“…uum models (no RIVE) (Pomaro et al 2011), and finiteelement mesoscale models Giorla, Le Pape, and Huang 2016). In the absence of RIVE (or swelling), radiation damage [i.e., induced loss of mechanical properties (Hilsdorf et al 1978;Field et al 2015)] has very limited effects on the CBS (Pomaro et al 2011).…”

Section: Summary Of Concrete Structural Analysis Literaturementioning

confidence: 99%

“…In the absence of RIVE (or swelling), radiation damage [i.e., induced loss of mechanical properties (Hilsdorf et al 1978;Field et al 2015)] has very limited effects on the CBS (Pomaro et al 2011). Moreover, the radiation field's strong attenuation produces a high RIVE gradient (Le Pape 2015) causing high biaxial compressive elastic stresses in the vertical and hoop directions near the reactor cavity and important tensile hoop stresses toward the back of the CBS (Andreev and Kapliy 2014; .…”

Section: Summary Of Concrete Structural Analysis Literaturementioning

confidence: 99%

Review of the Current State of Knowledge on the Effects of Radiation on Concrete

Rosseel

Maruyama

Pape

et al. 2016

ACT

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A review of the current state of knowledge on the effects of radiation on concrete in nuclear power production applications is presented. Emphasis is placed on the effects of radiation damage, as reflected by changes in engineering properties of concrete, in the evaluation of the long-term operation and for plant life or aging management of nuclear power plants (NPPs) in Japan, Spain, and the United States. National issues and concerns are described for Japan and the United States followed by a discussion of the fundamental understanding of the effects of radiation on concrete. Specifically, the effects of temperature, moisture content, and irradiation on ordinary Portland cement paste and the role of temperature and neutron energy spectra on radiation-induced volumetric expansion (RIVE) of aggregate-forming minerals are described. This is followed by a discussion of the bounding conditions for extended operation; the significance of accelerated irradiation conditions; the role of temperature and creep; and how these issues are being incorporated into numerical and meso-scale models. From these insights on radiation damage, analyses of these effects on concrete structures are reviewed, and the current status of work in Japan and the United States is described. Also discussed is the recent formation of a new international scientific and technical organization, the International Committee on Irradiated Concrete, to provide a forum for timely information exchanges among organizations pursuing the identification, quantification, and modeling of the effects of radiation on concrete in commercial nuclear applications. The paper concludes with a discussion of research gaps, including (1) interpreting test-reactor data, (2) evaluating service-irradiated concrete for aging management and to inform radiation damage models with the Zorita NPP (Spain) serving as the first comprehensive test case, (3) irradiated-assisted alkali-silica reactions, and (4) RIVE under constrained conditions.

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“…The structural significance of the restrained deformation will depend on the amplitude and the kinetics of the aggregate swelling and paste shrinkage. Such analysis can be performed in the spirit of the work of Pomaro et al (2011) based on finite element analysis. Although Pomaro et al's numerical simulations are certainly the first solid computational work trying to develop a radiationdamage model coupled with temperature and moisture transport, note that (1) the damage model was based, because of lack of better data, on the lowest envelope curve derived from Hilsdorf et al (1978)'s data collection with all the limitations discussed in Kontani et al (2010)'s paper and in our companion paper, and that (2) the authors did not account for the RIVE in their constitutive law.…”

Section: Gamma Ray Effectsmentioning

confidence: 99%

Radiation effects in concrete for nuclear power plants, Part II: Perspective from micromechanical modeling

Pape

Field

Remec

2015

Nuclear Engineering and Design

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Radiation damage evaluation on concrete within a facility for Selective Production of Exotic Species (SPES Project), Italy

Cited by 28 publications

References 15 publications

A Numerical Model for Concrete Strength Change under Neutron and Gamma-ray Irradiation

A Numerical Model for Concrete Strength Change under Neutron and Gamma-ray Irradiation

Review of the Current State of Knowledge on the Effects of Radiation on Concrete

Radiation effects in concrete for nuclear power plants, Part II: Perspective from micromechanical modeling

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