Uneven-aged management has been suggested as a method for balancing biodiversity conservation and wood production goals from managed forests in a variety of regions. In coastal Douglas-fir (Pseudotsuga menziesii) forests of the Pacific Northwest, implementation of uneven-aged management is hindered by a lack of experience with uneven-aged silvicultural systems, including...
The Advanced Test Reactor (ATR) is conducting
scoping studies for the conversion of its fuel from a
highly enriched uranium (HEU) composition to a low-enriched
uranium (LEU) composition, through the
Reduced Enrichment for Research and Test Reactors
Program, within the Global Threat Reduction Initiative.
These studies have considered a wide...
Oregon State University has recently conducted a complete core conversion analysis as part of the Reduced Enrichment for Research and Test Reactors Pprogram. The goals of the thermal hydraulic analyses were to calculate natural circulation flow rates, coolant temperatures and fuel temperatures as a function of core power for both...
Five U.S. high performance research reactors (HPRRs) are currently part of an international nonproliferation program with the objective of ultimately converting their highly enriched uranium (HEU) fuel to a new high density, low enriched uranium (LEU) fuel while still maintaining their reactor kinetic and thermal hydraulic performance. A uranium-molybdenum (U-Mo)...
Vibration of nuclear power plant components can cause fretting wear and fatigue that can eventually lead to component failure. Flexible, high-aspect ratio components under flow, such as the wire-wrapped cylindrical fuel elements in a liquid metal-cooled fast reactor (LMFR) core, are particularly susceptible to vibration due to their low natural...
The Advanced Test Reactor (ATR), under the Reduced Enrichment for Research and Test Reactors (RERTR) Program and the Global Threat Reduction Initiative (GTRI), is conducting feasibility studies for the conversion of its fuel from a highly enriched uranium (HEU) composition to a low enriched uranium (LEU) composition. These studies have...
Most operating power reactors use oxide fuel in the form of uranium oxide (UO2) which is robust against high temperatures but suffers from poor mechanical performance at high levels of burnup. Currently, the maximum average burnup in light water reactors in the US is 62.5 GWd/t, which is partially imposed...
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Wade R. Marcum
Most operating power reactors use oxide fuel in the form of uranium oxide
This paper provides a literature review in order to capture the state of the Special Purpose Acquisition Company (SPAC) market, incorporating the most recent research from 2020 and 2021. SPACs are an alternative way to take a company public. Rather than going through the traditional IPO process to access public...
The Oregon State University (OSU), Hydro Mechanical Fuel test Facility (HMFTF) is designed
to hydro-mechanically test prototypic plate type fuel. OSU’s fuel test program is a part of the
Global Threat Reduction Initiative (GTRI), formerly known as the Reduced Enrichment for
Research and Test Reactor program. One of the GTRI’s...
A set of experimental plates were characterized to understand their dynamic response in both air and water; in support of work performed at the Hydro-Mechanical Fuel Test Facility and the Global threat Reduction Initiative. In an attempt to gain further insight into the vibration of the experimental test plates, a...