... under repeated loading conditions over subsequent days. The study concludes that temperature fluctuation in the blister has more influence on blister growth than fluctuation of the pressure inside the blister. blister growth indirect tensile test finite-element method master curve ABAQUS TM...

.... In addition, cladding increases the potential for crack arrest. KEYWORDS: fracture toughness, master curve, pressurized thermal shock, transferability, cladding, reactor pressure vessel, biaxial loading Introduction The inner surface of a reactor pressure vessel RPV is covered with a stainless steel...

...) is substantially unaffected. For both materials, fracture toughness is better at the surfaces than in the central portion, although differences in terms of Master Curve reference temperatures are statistically not relevant at the 95 % confidence level. This effect is more pronounced for one of the materials, due...

... have been reviewed and put into context for continued and long-term safe operation of RPVs. KEYWORDS: reactor pressure vessels, fracture toughness, master curve, radiation embrittlement, Charpy impact, nickel, copper, PWR, WWER Introduction A series of nine coordinated research projects CRPs has been...

... consists of materials with optimized chemical composition and with high Copper or high Nickel content, respectively. Based on the generated and already existing data the RT NDT and the RT T 0 (Master Curve) concepts are applied with specific view on reference temperatures, transition temperature shifts...

.... In a first step, the trepan taken from the RPV Greifswald Unit 1 containing the multilayer welding seam located in the beltline region was investigated. This welding seam represents the irradiated, recovery annealed, and reirradiated condition. It is shown that the Master Curve approach as adopted in ASTM...

... using the Master Curve procedure, has been applied to surveillance materials from several Belgian nuclear power plants in the past 15 years. This has led to the establishment of a significant database, consisting of 292 fracture toughness data points for 23 material conditions (unirradiated materials...

... loaded in the ductile to brittle transition regime. The developed disk specimen is called PTS-D specimen. Master Curve tests on 15 PTS-D specimens are performed and compared to standard size specimens having deep and shallow cracks. The reference temperature obtained on PTS-D is equivalent to the one...

... by testing small specimens of different geometry in the ductile-to-brittle transition region with the application of the Master Curve methodology. The tests and data analysis have been performed following the Master Curve approach included in the ASTM Standard E1921-05, “Standard Test Method...

... to representation by the Master Curve. The temper embrittled steel revealed that the intergranular mechanism significantly extended the transition temperature range up to 150°C above T o . For the irradiated highly embrittled SA weld study, a total of 21 1T compact specimens were tested at five different...

... propagation, and subsequent crack arrest was achieved in all eight of the tests conducted in this investigation. The cleavage cracks were observed to propagate at nearly constant velocity, typically in the range of 350–400 m/s before arresting abruptly. A crack arrest master curve approach was used...

... equation. A linear correlation was obtained between P concentration and Charpy 41 J transition temperature ( T 41J ). Fracture toughness tests in the ductile-to-brittle transition temperature region have been conducted by the Master Curve method using 1T-CT specimens. The material subject to intergranular...

...G Wardle; W Geary Fracture toughness ( K J (cleavage) ) measurements made within the ductile-to-brittle transition region for ferritic pressure vessel steels are not always described by the shape of the Master Curve currently given in ASTM Standard E 1921. The objective of this paper is to show how...

...M Scibetta; E Lucon; R Chaouadi; E van Walle; R Gérard Broken Charpy specimens from the surveillance program of a Belgian nuclear power plant are used to obtain the fracture toughness in the transition regime using the master curve concept. Two approaches are used. The first one is based...

..., and so they have not been included in prior assessments of the applicability of the Master Curve approach to pressure vessel steels. The purpose of this study is to compare the temperature dependence and data scatter for this steel with the behavior predicted by the Master Curve. The available database...

... of this ferritic structural steel. The overall objective of this work is to compare the results of these biaxial cruciform tests to the results of standard and shallow crack fracture toughness tests to assess the effect of biaxial loading on the measured master curve and the T o reference temperature as defined...

...MA Sokolov; RK Nanstad; MK Miller The Heavy-Section Steel Irradiation Program at Oak Ridge National Laboratory (ORNL) includes a task to investigate the shape of the fracture toughness master curve for reactor pressure vessel steel highly embrittled as a consequence of irradiation exposure...