Abstract
This paper describes the current methodology in use at Battelle’s Columbus Laboratories for obtaining and processing pressure vessel surveillance data, extrapolating mechanical behavior, and calculating reactor coolant pressure-temperature operating curves. Recent results from the Arkansas Nuclear One—Unit 2 (ANO-2) benchmark cavity dosimetry experiment are reported. The results indicate that it is possible to calculate the flux in ex- vessel locations with accuracies on the order of 10-15 percent. Also, end of life metallurgical predictions for the Poolside Facility (PSF) Blind Test materials are compared with experimental data.
Another Batelle-Columbus research activity related to pressure vessel surveillance in fracture initiation and arrest toughness determination using miniature specimens. Small-sized laboratory specimens provide data which can be extremely non-conservative compared with large inservice structures and which exhibit considerable scatter. Battele-Columbus has examined these effects and has developed a simple method for minimixing them.
The radiation-induced temperature shift to crack arrest toughness has been measured and found to be significanty less for high-cooper materials than estimated from the shift in the Charpy 40.7 Joule temperature or from U.S. Nuclear Regulatory Commission (NRC) Regulatory Guide 1.99 (Rev. 1) calculations. A method has been developed for estimating crack arrest toughness as a function of fluence which is still conservative for high-copper materials but significantly less restrictive.
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© 1985 ECSC, EEC, EAEC, Brussels and Luxembourg
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Manahan, M.P., Rosenfield, A.R., Marschall, C.W., Landow, M.P. (1985). Battelle’s Columbus Laboratories Reactor Vessel Surveillance Service Activities. In: Genthon, J.P., Röttger, H. (eds) Reactor Dosimetry. Springer, Dordrecht. https://doi.org/10.1007/978-94-009-5378-9_10
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DOI: https://doi.org/10.1007/978-94-009-5378-9_10
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