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U.S. Department of Energy
Office of Scientific and Technical Information

Charpy trend-curve development based on PWR surveillance date

Conference ·
OSTI ID:5053508
The formulas given in the text provide a useful method of predicting the irradiation induced increase in the 41 joule Charpy transition temperature for plate and weld material. The standard deviations for the least squares fits are 26.4/sup 0/F for the weld equation and 15.6/sup 0/F for the plat relationship. The current method of derivation produces an unbiased estimate of the fluence exponent, resulting in increased reliability for fluence extrapolations. The method given for error estimation provides a relatively rigorous procedure for calculating uncertainties and takes proper account of the effects of uncertainties in the independent variables in any given application of the formulas. 11 refs., 4 figs., 4 tabs.
Research Organization:
Hanford Engineering Development Lab., Richland, WA (USA)
DOE Contract Number:
AC06-76FF02170
OSTI ID:
5053508
Report Number(s):
HEDL-SA-3011; CONF-8310143-74; ON: DE85018502
Country of Publication:
United States
Language:
English