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The division's objectives are to promote the advancement of knowledge and understanding of the fundamental physical phenomena characterizing nuclear reactors and other nuclear systems. The division encourages research and disseminates information through meetings and publications. Areas of technical interest include nuclear data, particle interactions and transport, reactor and nuclear systems analysis, methods, design, validation and operating experience and standards. The Wigner Award heads the awards program.
Materials in Nuclear Energy Systems (MiNES 2023)
December 10–14, 2023
New Orleans, LA|New Orleans Marriott
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Nuclear Science and Engineering
Fusion Science and Technology
ENEC inks deal with Kazatomprom, MOUs with TerraPower, GEH
On the margins of the COP28 climate conference in Dubai, UAE, this week, Barakah nuclear plant owner Emirates Nuclear Energy Corporation (ENEC) signed its first commercial uranium fuel supply contract with Kazatomprom, in addition to memorandums of understanding with two U.S.-based advanced reactor developers—TerraPower and GE Hitachi Nuclear Energy (GEH).
Hesham Khater, Sandra Brereton, Lucile Dauffy, Jim Hall, Luisa Hansen, Soon Kim, Bertram Pohl, Shiva Sitaraman, Jerome Verbeke, Mitchell Young
Fusion Science and Technology | Volume 74 | Number 4 | November 2018 | Pages 387-405
Technical Paper | doi.org/10.1080/15361055.2018.1471961
Articles are hosted by Taylor and Francis Online.
The National Ignition Facility at Lawrence Livermore National Laboratory is the world’s largest and most energetic laser system for inertial confinement fusion. The NIF is designed to perform shots with varying fusion yield (up to 20 MJ or 7.1 × 1018 neutrons per shot). A large number of diagnostic instruments are present inside the target chamber (TC) and target bay (TB) during shots. The gamma dose rates due to neutron activation are estimated at various decay times following the high-yield (20-MJ) shots. Several components, like the snout assemblies of the diagnostic instrument manipulators and target positioners are inserted inside the TC, close to the target during the shot. These components represent major sources of gamma decay after retraction outside the TC. Five days after a 20-MJ shot, dose rates near the highly activated (retracted) parts are on the order of 1 mSv/h and dose rates within the TB outside the TC but at distance from the retracted components drop to about 50 to 70 μSv/h. The dose is dominated by decay of 24Na (T1/2 = 14.95 h) and waiting for two additional days drops the dose rates significantly. Seven days following a 20-MJ shot, dose rates in the immediate vicinity of the retracted components drop to <0.2 mSv/h and the general ambient dose rates within the TB (away from retracted components) near the TC drop to <10 μSv/h. Dose rates at much larger distances from the TC (near TB wall) are an order of magnitude lower. Detailed radiation transport simulations are performed to create detailed dose rate maps for all floors inside the TB. The maps are used to estimate worker stay-out times following shots before entry is permitted into the TB.