Use of mini-CT specimens for fracture toughness characterization of low upper-shelf linde 80 weld before and after irradiation1

Mikhail A. Sokolov

doi:10.1115/PVP201884804

Use of mini-CT specimens for fracture toughness characterization of low upper-shelf linde 80 weld before and after irradiation¹

Mikhail A. Sokolov

Advanced Nuclear Materials

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution › peer-review

8 Scopus citations

Abstract

Mini-CT specimens are becoming a highly popular geometry for use in reactor pressure vessel (RPV) community for direct measurement of fracture toughness in the transition region using the Master Curve methodology. In the present study, Mini-CT specimens were machined from previously tested Charpy specimens of the Midland low upper-shelf Linde 80 weld in both, unirradiated and irradiated conditions. The irradiated specimens have been characterized as part of a joint ORNL-EPRI-CRIEPI collaborative program. The Linde 80 weld was selected because it has been extensively characterized in the irradiated condition by conventional specimens, and because of the need to validate application of Mini-CT specimens for low upper-shelf materials - a more likely case for some irradiated materials of older generation RPVs. It is shown that the fracture toughness reference temperatures, To, derived from these Mini-CT specimens are in good agreement with To values previously recorded for this material in the unirradiated and irradiated conditions. However, this study indicates that in real practice it is highly advisable to use a much larger number of specimens than the minimum number prescribed in ASTM E1921.

Original language	English
Title of host publication	Codes and Standards
Publisher	American Society of Mechanical Engineers (ASME)
ISBN (Electronic)	9780791851586
DOIs	https://doi.org/10.1115/PVP201884804
State	Published - 2018
Event	ASME 2018 Pressure Vessels and Piping Conference, PVP 2018 - Prague, Czech Republic Duration: Jul 15 2018 → Jul 20 2018

Publication series

Name	American Society of Mechanical Engineers, Pressure Vessels and Piping Division (Publication) PVP
Volume	1A-2018
ISSN (Print)	0277-027X

Conference

Conference	ASME 2018 Pressure Vessels and Piping Conference, PVP 2018
Country/Territory	Czech Republic
City	Prague
Period	07/15/18 → 07/20/18

Funding

The author acknowledges the U.S. Department of Energy, Office of Nuclear Energy, and the Light Water Reactor Sustainability (LWRS) Program, and Dr. Keith Leonard, Manager of the Materials Pathway, for support. The author wishes to thank Drs. Xiang Chen and Randy Nanstad for reviewing this paper. 1 Notice: This manuscript has been authored by UT-Battelle, LLC, under contract DE-AC0500OR22725 with the US Department of Energy. The United States Government retains and the publisher, by accepting the article for publication, acknowledges that the United States Government retains a nonexclusive, paid-up, irrevocable, worldwide license to publish or reproduce the published form of this manuscript or allow others to do so, for United States Government purposes.

Funders	Funder number
Light Water Reactor Sustainability
US Department of Energy
U.S. Department of Energy
Office of Nuclear Energy

Access to Document

10.1115/PVP201884804

Cite this

Sokolov, M. A. (2018). Use of mini-CT specimens for fracture toughness characterization of low upper-shelf linde 80 weld before and after irradiation¹ In Codes and Standards (American Society of Mechanical Engineers, Pressure Vessels and Piping Division (Publication) PVP; Vol. 1A-2018). American Society of Mechanical Engineers (ASME). https://doi.org/10.1115/PVP201884804

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Sokolov, MA 2018, Use of mini-CT specimens for fracture toughness characterization of low upper-shelf linde 80 weld before and after irradiation¹ in Codes and Standards. American Society of Mechanical Engineers, Pressure Vessels and Piping Division (Publication) PVP, vol. 1A-2018, American Society of Mechanical Engineers (ASME), ASME 2018 Pressure Vessels and Piping Conference, PVP 2018, Prague, Czech Republic, 07/15/18. https://doi.org/10.1115/PVP201884804

Use of mini-CT specimens for fracture toughness characterization of low upper-shelf linde 80 weld before and after irradiation¹ . / Sokolov, Mikhail A.
Codes and Standards. American Society of Mechanical Engineers (ASME), 2018. (American Society of Mechanical Engineers, Pressure Vessels and Piping Division (Publication) PVP; Vol. 1A-2018).

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution › peer-review

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