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The current Leak Before Break (LBB) assessment is based primarily on the monotonic fracture tearing instability. In it the maximum design accident load is compared with the fracture-tearing resistance load. The effect of cyclic loading has generally not been considered in the fracture assessment of nuclear power plant piping. It is a well-known fact that the reversible cyclic loading decreases the fracture resistance of the material, which leads to increased crack growth. Indian nuclear power reactors consider Operational-Basis-Earthquake (OBE) and Safe-Shutdown-Earthquake (SSE) event in the design of various structures, systems and components. Keeping this in view a series of cyclic tearing test have been conducted on straight pipes, made of ASTM SA333 Gr.6 carbon steel. This is the material of primary heat transport (PHT) piping material of Indian Pressurised Heavy Water Reactor (PHWR). In this series 13 tests have been carried out on circumferentially through wall cracked seamless and circumferential seam welded straight pipes under reversible cyclic bending loading. All the tests have been conducted under quasi-static i.e. slow loading rates and the dynamic effect is not considered. The cyclic test results have been compared with the corresponding monotonic pipe fracture test results. These test results and its comparison with corresponding monotonic tearing clearly illustrates the need of addressing the reduction in apparent fracture toughness of material under reversible cyclic loading and safe number of load cycles in the LBB assessment.

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Background: The majority of oral diseases in children are preventable. The pediatricians owing to the unique position they occupy in child care are invaluable in achieving standard oral and dental healthcare in children. This study was aimed to assess pediatrician's knowledge, attitude, and awareness toward early childhood caries (ECC), oral health, and treatment needs of their patients. Methods: A total of 65 pediatricians were randomly selected for the study and were requested to fill out an objective questionnaire pertaining to individual details, approach toward pediatric dentistry, and knowledge level of oral health, without providing any oral health information. Results: About 58.5% of pediatricians acknowledged the importance of pediatric dentistry. About 72.7% of pediatricians perform oral examination regularly. Around 17% of pediatricians have knowledge of the ECC. Only 32.3% of pediatricians acknowledged the cariogenicity of medicated syrups. Conclusion: This study shows those pediatricians who were surveyed had poor knowledge regarding ECC, oral health, and dental treatment need in children. Pediatricians need to update themselves on recent recommendations.

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