Metodik för identifiering av T-stycke med risk för termisk utmattning
Independent thesis Basic level (professional degree), 10 credits / 15 HE creditsStudent thesis
Thermal fatigue is a serious problem in todays power plants. A large amount of damages around the world circles around that subject. The damage can come from the mechanism of two flows mixing with different temperatures in a T-junction. It is a fundamental prerequisite that these T-junctions are frequently tested for damages. An amount of criterias steers the rate of testings. This guide/document will provide the process of rating the T-junctions resistance with valid information and ease the course. If a T-junction is stated as very sensetive for thermal fatigue, it will be graded with a low damage index. This value is reliant of the temperature difference between the two flows and can be changed with different actions, for example by adding a mixer to the T-junction. The mixer will blend the two flows so the thermal fatigue reduces or doesn’t occour at all. The T-junction can be tested with several methods, ultra sonic testing or eddy-current testing. The ultra sonic testing method is the most used method and can test the inside of the T-junction pipe without access of the inside.
Place, publisher, year, edition, pages
2014. , 30 p.
T stycke T junction thermal fatigue termisk utmattning
IdentifiersURN: urn:nbn:se:uu:diva-227433ISRN: UTH-INGUTB-EX-KKI-2014/01-SEOAI: oai:DiVA.org:uu-227433DiVA: diva2:729506
Forsmark Kraftgrupp AB
Bachelor Programme in Nuclear Engineering
Klintenberg, Mattias, ProfessorThulin, Joakim
Österlund, MichaelKlintenberg, Mattias, Professor