Tritium aging effects in palladium on kieselguhr

Helium release behavior of aged titanium tritides

“…After storage for 6.46 years (half-life of T is 12.6 years), the Ti sample was found to have a small amount of gas overpressure which was analyzed and found to be 100% 3 He. The sample then was thermally desorbed and results are show as a time plot in Figure 1, where two peaks are evident.…”

“…The first was acquired on the early part of the first peak, the second was collected at the minimum between the peaks, and the third at the very end of the experiment. Mass spectrometric analysis of the samples showed that the first sample was 1.53% 3 He and 98.0% hydrogen isotopes (41.4% T). The second sample was 1.12% 3 He and 98.9% hydrogen isotopes (41.5% T), indicating a slight dilution of the 3 He.…”

“…At that point the sample was mounted on a Sievert's apparatus equipped with MKS 10000 torr Baratron pressure sensors for these studies. Gas grab samples were collected and analyzed for isotope and 3 He content at appropriate points during experimentation. The test cell was not equipped with any method to directly measure sample temperature internally.…”

“…The Savannah River Site has been interested in studying tritium decay processes in metal hydrides for many years [1,2,3]. Tritium decay in metal tritides produces 3 He in the bulk.…”

“…Tritium decay in metal tritides produces 3 He in the bulk. This He is highly insoluble, and typically nucleates and forms internal bubbles.…”