29 Matching Results

Search Results

Advanced search parameters have been applied.
in subjects: "Iaea"  
Results: 1 - 24 next
open access

Thermal Neutron Capture Cross Sections of the PalladiumIsotopes

Description: Precise gamma-ray thermal neutron capture cross sectionshave been measured at the Budapest Reactor for all elements withZ=1-83,92 except for He and Pm. These measurements and additional datafrom the literature been compiled to generate the Evaluated Gamma-rayActivation File (EGAF), which is disseminated by LBNL and the IAEA. Thesedata are nearly complete for most isotopes with Z<20 so the totalradiative thermal neutron capture cross sections can be determineddirectly from the decay scheme. For … more
Date: July 17, 2006
Creator: Firestone, R.B.; Krticka, M.; McNabb, D.P.; Sleaford, B.; Agvaanluvsan, U.; Belgya, T. et al.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Evaluation of the DRAGON Code for VHTR Design Analysis.

Description: This letter report summarizes three activities that were undertaken in FY 2005 to gather information on the DRAGON code and to perform limited evaluations of the code performance when used in the analysis of the Very High Temperature Reactor (VHTR) designs. These activities include: (1) Use of the code to model the fuel elements of the helium-cooled and liquid-salt-cooled VHTR designs. Results were compared to those from another deterministic lattice code (WIMS8) and a Monte Carlo code (MCNP). … more
Date: January 12, 2006
Creator: Taiwo, T. A. & Kim, T. K.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Compatibility of the Radiating Divertor with High Performance Plasmas in DIII-D

Description: A radiating divertor approach was successfully applied to high performance 'hybrid' plasmas [M.R. Wade, et al., Proc. 20th IAEA Fusion Energy Conf., Vilamoura, (2004)]. Our technique included: (1) injecting argon near the outer divertor target, (2) enhancing the plasma flow into the inner and outer divertors by a combination of particle pumping and deuterium gas puffing upstream of the divertor targets, and (3) isolating the inner divertor from the outer by a structure in the private flux regio… more
Date: May 18, 2006
Creator: Petrie, T. W.; Wade, M. R.; Brooks, N. H.; Fenstermacher, M. E.; Groth, M.; Hyatt, A. W. et al.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Evidence for Anomalous Effects on the Current Evolution in Tokamak Operating Scenarios

Description: Alternatives to the usual picture of advanced tokamak (AT) discharges are those that form when anomalous effects alter the plasma current and pressure profiles and those that achieve stationary characteristics through mechanisms so that a measure of desired AT features is maintained without external current-profile control. Regimes exhibiting these characteristics are those where the safety factor (q) evolves to a stationary profile with the on-axis and minimum q {approx} 1 and those with a dee… more
Date: October 3, 2006
Creator: Casper, T.; Jayakumar, R.; Allen, S.; Holcomb, C.; Makowski, M.; Pearlstein, L. et al.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Gyrokinetic Simulations of ETG and ITG Turbulence

Description: Published gyrokinetic continuum-code simulations indicated levels of the electron thermal conductivity {chi}{sub e} due to electron-temperature-gradient (ETG) turbulence large enough to be significant in some tokamaks, while subsequent global particle-in-cell (PIC) simulations gave significantly lower values. We have carried out an investigation of this discrepancy. We have reproduced the key features of the aforementioned PIC simulations using the flux-tube gyrokinetic PIC code, PG3EQ, thereby… more
Date: October 3, 2006
Creator: Dimits, A.; Nevins, W.; Shumaker, D.; Hammett, G.; Dannert, T.; Jenko, F. et al.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

DIII-D Studies of Massive Gas Injection Fast Shutdowns for Disruption Mitigation

Description: Injection of massive quantities of gas is a promising technique for fast shutdown of ITER for the purpose of avoiding divertor and first wall damage from disruptions. Previous experiments using massive gas injection (MGI) to terminate discharges in the DIII-D tokamak have demonstrated rapid shutdown with reduced wall heating and halo currents (relative to natural disruptions) and with very small runaway electron (RE) generation [1]. Figure 1 shows time traces which give an overview of shutdown … more
Date: September 29, 2006
Creator: Hollmann, E.; Jernigan, T.; Antar, G.; Bakhtiari, M.; Boedo, J.; Combs, S. et al.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Edge Localized Mode Control in DIII-D Using Magnetic Perturbation-Induced Pedestal Transport Changes

Description: Edge localized mode (ELM) control is a critical issue for ITER because the impulsive power loading from ELMs is predicted to limit the divertor lifetime to only a few hundred full-length pulses. Consequently, a technique that replaces the ELM-induced transport with more continuous transport while preserving the H-mode pedestal height and core performance would significantly improve the viability of ITER. One approach is to use edge resonant magnetic perturbations (RMPs) to enhance pedestal tran… more
Date: September 27, 2006
Creator: Moyer, R. A.; Burrell, K. H.; Evans, T. E.; Fenstermacher, M. E.; Joseph, I.; Osborne, T. H. et al.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Safety Analysis of the US Dual Coolant Liquid Lead-Lithium ITER Test Blanket Module

Description: The US is proposing a prototype of a dual coolant liquid lead-lithium (DCLL) DEMO blanket concept for testing in the International Thermonuclear Experimental Reactor (ITER) as an ITER Test Blanket Module (TBM). Because safety considerations are an integral part of the design process to ensure that this TBM does not adversely impact the safety of ITER, a safety assessment has been conducted for this TBM and its ancillary systems as requested by the ITER project. Four events were selected by the … more
Date: July 1, 2006
Creator: Merrill, Brad; Reyes, Susana; Sawan, Mohamed & Wong, Clement
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Heavy-Ion-Fusion-Science: Summary of U.S. Progress

Description: Over the past two years noteworthy experimental and theoretical progress has been made towards the top-level scientific question for the U.S. program in Heavy Ion Fusion Science and High Energy Density Physics: ''How can heavy ion beams be compressed to the high intensity required to create high energy density matter and fusion conditions''? [1]. New results in transverse and longitudinal beam compression, beam-target interaction, high-brightness transport, beam production, as well as a new sch… more
Date: April 16, 2006
Creator: Yu, Simon S.; Logan, B. G.; Barnard, J. J.; Bieniosek, F. M.; Davidson, R. C.; Friedman, A. et al.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Evaluation of the Strategic Value of Fully Burnt PBMR Spent Fuel - A Report to ISPO in Response to IAEA Letter Request (2004-08-30)

Description: The IAEA needs to determine the value of imposing safeguards on the spent fuel storage at the Pebble Bed Modular Reactor (PBMR) planned for construction in the Republic of South Africa. The PBMR will use hundreds of thousands of fuel elements in the shape of small spheres (6 cm in diameter). The PBMR plant design calls for the storage on site of all the spent fuel generated during the whole life of the reactor, expected to span 40 years. The spent fuel storage system is designed (or to be desig… more
Date: May 1, 2006
Creator: Ougouag, A. M.; Gougar, H. D. & Todd, T. A.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Joint Assessment of ETRR-2 Research Reactor Operations Program, Capabilities, and Facilities

Description: A joint assessment meeting was conducted at the Egyptian Atomic Energy Agency (EAEA) followed by a tour of Egyptian Second Research Reactor (ETRR-2) on March 22 and 23, 2006. The purpose of the visit was to evaluate the capabilities of the new research reactor and its operations under Action Sheet 4 between the U.S. DOE and the EAEA, ''Research Reactor Operation'', and Action Sheet 6, ''Technical assistance in The Production of Radioisotopes''. Preliminary Recommendations of the joint assessmen… more
Date: May 8, 2006
Creator: Bissani, M & O'Kelly, D S
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Recruitment of U.S. Citizens for Vacancies in IAEA Safeguards.

Description: The International Atomic Energy Agency (IAEA) relies on its member states to assist with recruiting qualified individuals for positions within the IAEA's secretariat. It is likewise important to the U.S. government for U.S. citizens to take positions with the IAEA to contribute to its success. It is important for persons within and outside the U.S. nuclear and safeguards industries to become aware of the job opportunities available at the IAEA and to be informed of important vacancies as they a… more
Date: July 16, 2006
Creator: Occhiogrosso, D. & Pepper, S.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Development of a Safeguards Verification Method and Instrument to Detect Pin Diversion from Pressurized Water Reactor (PWR) Spent Fuel Assemblies

Description: A technical safeguards challenge has remained for decades for the IAEA to identify possible diversion of nuclear fuel pins from Light Water Reactor (LWR) spent fuel assemblies. In fact, as modern nuclear power plants are pushed to higher power levels and longer fuel cycles, fuel failures (i.e., ''leakers'') as well as the corresponding fuel assembly repairs (i.e., ''reconstitutions'') are commonplace occurrences within the industry. Fuel vendors have performed hundreds of reconstitutions in the… more
Date: October 10, 2006
Creator: Ham, Y S; Maldonado, G I; Burdo, J & He, T
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Results from the CDX-U Lithium Wall and NSTX Lithium Pallet Injection and Evaporation Experiments

Description: CDX-U has been operated with the vacuum vessel wall and limiter surfaces nearly completely coated with lithium, producing dramatic improvements to plasma performance. Discharges achieved global energy confinement times up to 6 ms, exceeding previous CDX-U results by a factor of 5, and ITER98P(y,1) scaling by 2-3. Lithium wall coatings up to 1000 {angstrom} thick were applied between discharges by electron-beam-induced evaporation of a lithium-filled limiter and vapor deposition from a resistive… more
Date: October 5, 2006
Creator: Majeski, R; Kugel, H; Bell, M; Bell, R; Beiersdorfer, P; Bush, C et al.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Impact of the U.S. Support Program Safeguards Internship Program.

Description: The U.S. Support Program began funding an internship program in the IAEA Department of Safeguards in 2002. Since that time, 39 U.S. citizens and permanent residents have been placed in one-year, paid internships with the IAEA. The management of the internship program was originally the responsibility of the International Safeguards Project Office but was transferred to the Office of Educational Programs at Brookhaven National Laboratory in 2004. Feedback on the internship program from the U.S. … more
Date: July 16, 2006
Creator: Pepper, S. & Osiecki, C.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Particle and Energy Transport in the SOL of DIII-D and NSTX

Description: The far scrape-off layer (SOL) radial transport and plasma-wall contact is mediated by intermittent and ELM-driven transport. Experiments to characterize the intermittent transport and ELMs have been performed in both DIII-D and NSTX under similar conditions. Both intermittent transport and ELMs are comprised of filaments of hot, dense plasma (n{sub e} {approx} 1 x 10{sup 13} cm{sup -3}, T{sub e} {approx} 400 eV) originating at the edge, transport both particles and heat into the SOL by convect… more
Date: October 9, 2006
Creator: Boedo, J.; Maqueda, R.; Rudakov, D.; McKee, G.; Kugel, H.; Maingi, R. et al.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Basic Research Needs for Advanced Nuclear Systems. Report of the Basic Energy Sciences Workshop on Basic Research Needs for Advanced Nuclear Energy Systems, July 31-August 3, 2006

Description: The global utilization of nuclear energy has come a long way from its humble beginnings in the first sustained nuclear reaction at the University of Chicago in 1942. Today, there are over 440 nuclear reactors in 31 countries producing approximately 16% of the electrical energy used worldwide. In the United States, 104 nuclear reactors currently provide 19% of electrical energy used nationally. The International Atomic Energy Agency projects significant growth in the utilization of nuclear power… more
Date: October 1, 2006
Creator: Roberto, J.; Diaz de la Rubia, T.; Gibala, R.; Zinkle, S.; Miller, J. R.; Pimblott, S. et al.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Studies of electron and proton isochoric heating for fast ignition

Description: Isochoric heating of inertially confined fusion plasmas by laser driven MeV electrons or protons is an area of great topical interest in the inertial confinement fusion community, particularly with respect to the fast ignition (FI) proposal to use this technique to initiate burn in a fusion capsule. Experiments designed to investigate electron isochoric heating have measured heating in two limiting cases of interest to fast ignition, small planar foils and hollow cones. Data from Cu K{alpha} fl… more
Date: October 2, 2006
Creator: Mackinnon, A.; Key, M.; Akli, K.; Beg, F.; Clarke, R.; Clarke, D. et al.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

USE OF MAILBOX APPROACH, VIDEO SURVEILLANCE, AND SHORT-NOTICE RANDOM INSPECTIONS TO ENHANCE DETECTION OF UNDECLARED LEU PRODUCTION AT GAS CENTRIFUGE ENRICHMENT PLANTS.

Description: Current safeguards approaches used by the IAEA at gas centrifuge enrichment plants (GCEPs) need enhancement in order to detect undeclared LEU production with adequate detection probability. ''Mailbox'' declarations have been used in the last two decades to verify receipts, production, and shipments at some bulk-handling facilities (e.g., fuel-fabrication plants). The operator declares the status of his plant to the IAEA on a daily basis using a secure ''Mailbox'' system such as a secure tamper-… more
Date: July 16, 2006
Creator: Boyer, Brian D.; Gordon, David M. & Jo, Jae
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Sister Lab Program Prospective Partner Nuclear Profile: Indonesia

Description: Indonesia has participated in cooperative technical programs with the IAEA since 1957, and has cooperated with regional partners in all of the traditional areas where nuclear science is employed: in medicine, public health (such as insect control and eradication programs), agriculture (e.g. development of improved varieties of rice), and the gas and oil industries. Recently, Indonesia has contributed significantly to the Reduced Enrichment Research and Training Reactor (RERTR) Program by conduc… more
Date: December 14, 2006
Creator: Bissani, M & Tyson, S
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Confinement Studies in High Temperature Spheromak Plasmas

Description: Recent results from the SSPX spheromak experiment demonstrate the potential for obtaining good energy confinement (Te &gt; 350eV and radial electron thermal diffusivity comparable to tokamak L-mode values) in a completely self-organized toroidal plasma. A strong decrease in thermal conductivity with temperature is observed and at the highest temperatures, transport is well below that expected from the Rechester-Rosenbluth model. Addition of a new capacitor bank has produced 60% higher magnetic … more
Date: October 23, 2006
Creator: Hill, D. N.; Mclean, H. S.; Wood, R. D.; Casper, T. A.; Cohen, B. I.; Hooper, E. B. et al.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Making the Postclosure Safety Case for the Proposed Yucca Mountain Repository

Description: The International Atomic Energy Agency (IAEA), in its advisory standard for geological repositories promulgated jointly with the Nuclear Energy Agency (NEA) of the Organization for Economic Co-operation and Development, explicitly distinguishes between the concepts of a safety case and a safety assessment. As defined in the advisory standard, the safety case is a broader set of arguments that provide confidence and substantiate the formal analyses of system safety made through the process of sa… more
Date: August 28, 2006
Creator: Swift, P. & Luik, A.V.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Sister Lab Program Prospective Partner Nuclear Profile: Vietnam

Description: Vietnam's nuclear program began in the 1960s with the installation at Dalat of a 250 kW TRIGA Mk-II research reactor under the U.S. Atoms for Peace Program. The reactor was shut down and its core removed only a few years later, and the nuclear research program was suspended until after the end of the civil war in the late 1970s. The Soviet Union assisted Vietnam in restoring the Dalat reactor to an operational status in 1984, trained a cadre of scientific and technical staff in its operation, a… more
Date: December 14, 2006
Creator: Bissani, M & Tyson, S
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Closure of the Fast Flux Test Facility (FFTF) History & Status & Future Plans

Description: In 1993, the US Department of Energy (DOE) decided to shut down the Fast Flux Test Facility (FFTF) due to lack of national missions that justified the annual operating budget of approximately $88M/year. The initial vision was to ''deactive'' the facility to an industrially and radiologically safe condition to allow long-term, minimal surveillance storage until approximately 2045. This approach would minimize near term cash flow and allow the radioactive decay of activated components. The final … more
Date: February 24, 2006
Creator: Farabee, O. A.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
Back to Top of Screen