The ASME Boiler and Pressure Vessel Code provides fracture toughness curves of ferritic pressure vessel steels that are indexed by a reference temperature for nil ductility transition (RTNDT). The ASME Code also prescribes how to determine RTNDT. The B&W Owners Group has reactor pressure vessels that were fabricated by Babcock & Wilcox using Linde 80 flux. These vessels have welds called Linde 80 welds. The RTNDT values of the Linde 80 welds are of great interest to the B&W Owners Group. These RTNDT values are used in compliance of the NRC regulations regarding the PTS screening criteria and plant pressure-temperature limits for operation of nuclear power plants. A generic RTNDT value for the Linde 80 welds as a group was established by the NRC, using an average of more than 70 RTNDT values. Emergence of the Master Curve method enabled the industry to revisit the validity issue surrounding RTNDT determination methods. T0 indicates that the dropweight test based TNDT is a better index than Charpy transition temperature based index, at least for the RTNDT of unirradiated Linde 80 welds. An alternative generic RTNDT is presented in this paper using the T0 data obtained by fracture toughness tests in the brittle-to-ductile transition temperature range, in accordance with the ASTM E1921 standard.
Skip Nav Destination
ASME 2002 Pressure Vessels and Piping Conference
August 5–9, 2002
Vancouver, BC, Canada
Conference Sponsors:
- Pressure Vessels and Piping Division
ISBN:
0-7918-4654-7
PROCEEDINGS PAPER
Alternative RTNDT for Linde 80 Weld Materials
J. B. Hall
J. B. Hall
Framatome ANP, Lynchburg, VA
Search for other works by this author on:
K. K. Yoon
Framatome ANP, Lynchburg, VA
J. B. Hall
Framatome ANP, Lynchburg, VA
Paper No:
PVP2002-1362, pp. 145-150; 6 pages
Published Online:
August 14, 2008
Citation
Yoon, KK, & Hall, JB. "Alternative RTNDT for Linde 80 Weld Materials." Proceedings of the ASME 2002 Pressure Vessels and Piping Conference. Fatigue, Fracture and Damage Analysis, Volume 2. Vancouver, BC, Canada. August 5–9, 2002. pp. 145-150. ASME. https://doi.org/10.1115/PVP2002-1362
Download citation file:
9
Views
Related Proceedings Papers
Related Articles
Alternative Method of RT NDT Determination
for Some Reactor Vessel Weld Metals Validated by Fracture Toughness
Data
J. Pressure Vessel Technol (November,1995)
Validation of RT T 0 for German Reactor Pressure Vessel Steels
J. Pressure Vessel Technol (August,2008)
Investigation of the Beltline Welding Seam and Base Metal of the Greifswald WWER-440 Unit 1 Reactor Pressure Vessel
J. Eng. Gas Turbines Power (May,2011)
Related Chapters
Part 2, Section II—Materials and Specifications
Companion Guide to the ASME Boiler and Pressure Vessel Code, Volume 1, Third Edition
Part 2, Section II—Materials and Specifications
Companion Guide to the ASME Boiler & Pressure Vessel Code, Volume 1, Second Edition
Subsection NCA—General Requirements for Division 1 and Division 2
Companion Guide to the ASME Boiler and Pressure Vessel Code, Volume 1, Third Edition