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Materials Science & Technology
The objectives of MSTD are: promote the advancement of materials science in Nuclear Science Technology; support the multidisciplines which constitute it; encourage research by providing a forum for the presentation, exchange, and documentation of relevant information; promote the interaction and communication among its members; and recognize and reward its members for significant contributions to the field of materials science in nuclear technology.
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November 17–21, 2024
Orlando, FL|Renaissance Orlando at SeaWorld
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The Standards Committee is responsible for the development and maintenance of voluntary consensus standards that address the design, analysis, and operation of components, systems, and facilities related to the application of nuclear science and technology. Find out What’s New, check out the Standards Store, or Get Involved today!
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Fusion Science and Technology
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Nuclear supply chain innovation and collaboration: Keeping the nuclear supply chain viable through change
The next nuclear renaissance may be upon us, but with it comes a perfect storm. The industry is unprepared for a surge in demand for goods and services from both the existing light water fleet and the next generation of reactors. We are currently teetering on the edge of severe supply chain issues, but if the nuclear industry can understand the sources of our challenges, we can mitigate them.
A.V.Golubev, T.A.Kosheleva, Kris Surano, L.F.Belovodsky, V.F.Kuznetsova, William Hoppes, V.N.Golubeva, S.V.Mavrin
Fusion Science and Technology | Volume 41 | Number 3 | May 2002 | Pages 409-412
Biology | Proceedings of the Sixth International Conference on Tritium Science and Technology Tsukuba, Japan November 12-16, 2001 | doi.org/10.13182/FST02-A22621
Articles are hosted by Taylor and Francis Online.
It is known that lichens are used for assessment of atmosphere pollution by heavy metals, radioniclides, sulfur and nitrogen oxides, etc. However there were published in scientific literature only limited data on usage of lichens as bio-indicators of tritium1,2. There are presented in the paper the results of lichen application study for assessment of atmospheric pollution by tritium. Both tritium in tissue free water (TFWT) and organically bound tritium (OBT) were measured in lichen. Lichen species Hypogimnia physodes was used as a basic bioindicator. Pieces of lichen were sampled within the distance of 30 km of emission source. Established sampling sites were rectangular in shape with linear dimensions 100*100 m. Lichen samples were sampled from various trees: birch tree, aspen tree, pine tree and linden tree at the level of 1.5 m above the ground. Thermal vacuum desorption technique was used to extract TFWT from lichen samples. Pyrolitic oxidation of dried lichen samples by vanadium oxide was used to extract tritium from OBT. Air monitoring stations equipped with active and passive samplers were used to sample HT and HTO from the atmosphere. Liquid scintillation counting was used to measure tritium content in water samples. It was determined that tritium content in lichen samples (both in TFWT and OBT) in vicinity of an emission source is higher than that of tritium content in lichen at distant sampling sites. Variation of tritium activity of TFWT was about 10 times, variation of tritium activity in OBT was about 70 times. It was supposed that tritium content in TFWT was in equilibrium with tritium content in atmosphere at the minute of sampling, while tritium content in OBT was determined by tritium content in atmosphere over longer period of time.