Load carrying behaviour of the primary system of PWRs for loads beyond the design limits

Maile, Karl; Klenk, Andreas; Obst, V.; Sturm, D.

doi:10.1016/0029-5493(90)90156-r

Cited by 8 publications

(3 citation statements)

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“…The presented methods are compared on a large-scale experiment, which was performed by the MPA University of Stuttgart (Maile et al 1990). A test pipe with similar geometry, material (20MnMoNi5-5) and heat treatment as a straight section of a German PWR main coolant line, but without cladding, was welded together with auxiliary parts to a test assembly (Figure 4).…”

Section: Comparison On a Large-scale Experiments And Benchmark Analysesmentioning

confidence: 99%

“…Figure 4: Geometry of the test specimen (Maile et al 1990) The geometric tolerance of the wall thickness was measured ±0 mm / +0.3 mm. Ultrasonic measurements did not reveal any defects.…”

Section: Comparison On a Large-scale Experiments And Benchmark Analysesmentioning

confidence: 99%

“…Figure 5: Internal pressure, temperature and radial deformation in the symmetry plane (Maile et al 1990) Table 1 lists the applied models and boundary conditions. The 2D model makes use of the almost symmetric load situation considering only the radial temperature gradient (Figure 6).…”

Section: Comparison On a Large-scale Experiments And Benchmark Analysesmentioning

confidence: 99%

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Methods for failure assessment of NPP pressure boundary under severe accident loading

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Sievers

2021

Nuclear Engineering and Design

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During postulated high-pressure core melt accidents, high temperatures can be reached in the reactor coolant system (RCS) pressure boundary due to hot gases from the core melt process, which may lead to failure of the pressure boundary in terms of a leak or a break. Location, time and mode of the failure can have large implications on the further accident progression. Nevertheless, not for all possibly affected components and failure modes suitable assessment methods, in-depth structure mechanical analyses or in some cases even simple models for the integration into severe accident codes are available.This paper concentrates on assessment methods for gross boundary failure, e.g. of RCS piping. First, failure modes of components as well as the deformation and fracture behaviour of typical RCS materials in the severe accident loading regime are discussed. Established assessment methods based on linear damage accumulation and the use of Finite Element (FE) codes as well as a newly developed method based on a reduction to a 0-dimensional element is presented. The methods are validated and compared on a largescale experiment of a DN700 pipe and international benchmark analyses within the OECD/NEA activity COSSAL (Components and Structures under Severe Accident Loading). Results of the application to a representative severe accident scenario in a PWR and parametric studies are summarized.

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Section: Comparison On a Large-scale Experiments And Benchmark Analysesmentioning

confidence: 99%

“…Figure 4: Geometry of the test specimen (Maile et al 1990) The geometric tolerance of the wall thickness was measured ±0 mm / +0.3 mm. Ultrasonic measurements did not reveal any defects.…”

Section: Comparison On a Large-scale Experiments And Benchmark Analysesmentioning

confidence: 99%

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Methods for failure assessment of NPP pressure boundary under severe accident loading

Bläsius

Sievers

2021

Nuclear Engineering and Design

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Failure probabilities of the primary circuit pressure boundary of an HTR-Module for process heat generation under accident conditions for different failure modes

Staat¹

1993

Nuclear Engineering and Design

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Probabilistic assessment of the fracture mechanics behaviour of an HTR-module primary circuit pressure boundary

Staat

1996

Nuclear Engineering and Design

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Load carrying behaviour of the primary system of PWRs for loads beyond the design limits

Cited by 8 publications

References 0 publications

Methods for failure assessment of NPP pressure boundary under severe accident loading

Methods for failure assessment of NPP pressure boundary under severe accident loading

Failure probabilities of the primary circuit pressure boundary of an HTR-Module for process heat generation under accident conditions for different failure modes

Probabilistic assessment of the fracture mechanics behaviour of an HTR-module primary circuit pressure boundary

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