Actions for Fracture mechanics evaluation of some LOFT blowdown system and primary coolant coldleg welds [electronic resource].

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Fracture mechanics evaluation of some LOFT blowdown system and primary coolant coldleg welds [electronic resource].

Published
Oak Ridge, Tenn. : Distributed by the Office of Scientific and Technical Information, U.S. Dept. of Energy, 1978.
Physical Description
Pages: 53 : digital, PDF file
Additional Creators
United States. Department of Energy. Office of Scientific and Technical Information
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Summary
Fracture mechanics evaluations were performed for three welds in the LOFT blowdown system and one weld in the LOFT primary coolant system. Because the applied stress is not known, a sensitivity analysis was run. The assumed initial defect size was one that had a small probability of being missed; applied stresses of 68.9, 137.8, 206.7, and 344.8 MPa were used. It was found that at the lowest stress (68.9 MPa or 10 ksi) the number of cycles from the initial size to rupture was over 6 x 10/sup 6/. The current calculations indicate that with the worst crack configuration--depth-to-length ratio (a/2c) of 0.10--about 1000 cycles with a peak stress of 227.5 MPa (33 ksi) will be needed to propagate the 0.5 x 5.1 cm (0.2 x 2.0 in.) crack to failure.
Report Numbers
E 1.99:ltr-112-119
E 1.99: r-3534
r-3534
ltr-112-119
Subject(s)
Other Subject(s)
Note
Published through SciTech Connect.
05/02/1978.
"ltr-112-119"
" r-3534"
Nagata, P.K.
Idaho National Engineering Lab., Idaho Falls (USA)
Funding Information
EY-76-C-07-1570
View MARC record | catkey: 14803181