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Testing parameters of time, pressure (hoop stress) and temperature would be chosen to encompass the predicted exposure conditions. For example if the dry out temperature can reach 400°C then testing should be done, for example, at temperature internals of 350°C, 400°C and 450°C to cover the potential exposure ranges. Since the dry out time at these temperatures is relatively short the test times should be from a few hours to a few days. The samples can be measured after each time interval and then returned to the furnace for additional exposure. The pressures would be determined based on the range of representative fuel rod internal pressures at the test temperatures.
（For the longer term lower temperature creep representing conditions after the dry out anneal similar samples and test procedures could be used except that the test conditions would be different.） The test times may need to extend to 3 or 5 years.