Fracture toughness shifts in high-copper weldments (series 5 and 6)
The specific activities to be performed in this task are the: (1) continuation of Phase 2 of the Fifth Irradiation Series, and (2) completion of the Sixth Irradiation Series, including testing nine irradiated Italian crack-arrest specimens. The test results of the Italian crack-arrest specimens are being analyzed, and full details will be published in a NUREG report currently in preparation. The crack-mouth opening displacement (CMOD) was measured at a distance greater than that prescribed in the American Society for Testing and Materials (ASTM) {open_quotes}Test for Determining Plane-Strain Crack-Arrest Fracture Toughness, K{sub la}, of Ferritic Steels{close_quotes} (E 1221-88). A method for adjusting the CMOD to account for this has been developed and is presented. The correction was {approximately}4% for small specimens and {approximately}2% for the larger ones. As part of this task, irradiation of HSSI weld 73W to a high fluence [5 x 10{sup 19} neutrons/cm{sup 2} ( > 1 MeV)] will be performed to determine whether the K{sub Jc} curve shape change observed in the Fifth HSSI Series is exacerbated. The design and fabrication of the temperature and dosimetry verification capsules are performed under this task, but for purposes of continuity, their progress will be reported under Task 6, where the design of the new irradiation facilities and capsules is performed.
- Research Organization:
- Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States); US Nuclear Regulatory Commission (NRC), Washington, DC (United States). Office of Nuclear Regulatory Research
- OSTI ID:
- 223650
- Report Number(s):
- NUREG/CR-5591-Vol.6-No.1; ON: DE96002233; TRN: 96:002007-0002
- Resource Relation:
- Other Information: PBD: Oct 1995; Related Information: Is Part Of Heavy-section steel irradiation program. Progress report, October 1994--March 1995; Corwin, W.R. [Oak Ridge National Lab., TN (United States)]; PB: 61 p.
- Country of Publication:
- United States
- Language:
- English
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