Validation and application of the Master Curve and reconstitution techniques to a Spanish nuclear vessel

Application of Reconstitution Technique on Performance Evaluation of Anchor Bolts

“…Therefore, five types of reconstituted specimens with different length of insert (12mm, 14mm, 16mm, 18mm and 20mm) and end stud were designed so to determine the suitable minimum insert length for 42CrMoE steel. Based on the previous results [6,8,9], it is seen that the minimum insert length generally depends on the toughness level of the insert and welding conditions whether the reconstitution affects it or not, and it can be expressed as the following formula [10],…”

Degradation Due to Neutron Embrittlement of Nuclear Vessel Steels: A Critical Review about the Current Experimental and Analytical Techniques to Characterise the Material, with Particular Emphasis on Alternative Methodologies

“…Indeed, the main feature of the MC method consisting of assuming that the dependence of the fracture toughness of a material on temperature in the transition range is not sensitive to characteristics such as the mechanical properties and the microstructure is purely speculative for the cases mentioned above.  The published literature shows that the PCCv (Pre Cracked Charpy-V Notched) specimen analysed using the ASTM Standard E 1921(ASTM E 1921, 2009) generally shows a reference temperature ~10 °C lower than the CT (compact tension) specimen. Compared with the inherent scatter in the transition temperature, this difference is small.…”

“…The remainder of the specimens may be tested at intermediate temperatures as needed to define the effects of temperature on the tensile properties. It is recommended as well that a minimum of 8 fracture toughness specimens be tested to establish the reference temperature, T 0 , through Test Method E 1921(ASTM E 1921, 2009) (see Section 5 for details about this issue) for the limiting beltline material and/or other fracture toughness tests be performed following Test Method E 1820 (ASTM E 1820(ASTM E , 2001).  The first step in the implementation of a surveillance programme is the estimation of the peak EOL vessel inside surface fluence (EOL ID) and the peak EOL vessel 1⁄4-T (T being the thickness of the vessel) fluence 3 (identified as EOL 1⁄4-T).…”

“…Valiente et al (Valiente et al, 2005) have briefly but comprehensively reviewed the previous contributions made to understand cleavage in a ferritic matrix that leads to the MC approach. The basic MC method for analysis of brittle fracture test results is defined in the standard ASTM E 1921(ASTM E 1921, 2009). The mathematical and empirical details of the procedure are available in (Merkle et al, 1998;Ferreño, 2008;Ferreño et al 2009).…”

“…The basic MC method for analysis of brittle fracture test results is defined in the standard ASTM E 1921(ASTM E 1921, 2009). The mathematical and empirical details of the procedure are available in (Merkle et al, 1998;Ferreño, 2008;Ferreño et al 2009). The main features and advantages of the method are hereafter summarised:  MC assumes that cleavage fracture in non austenitic steels is triggered by the presence of particles close to the crack tip.…”