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Division Spotlight
Isotopes & Radiation
Members are devoted to applying nuclear science and engineering technologies involving isotopes, radiation applications, and associated equipment in scientific research, development, and industrial processes. Their interests lie primarily in education, industrial uses, biology, medicine, and health physics. Division committees include Analytical Applications of Isotopes and Radiation, Biology and Medicine, Radiation Applications, Radiation Sources and Detection, and Thermal Power Sources.
Meeting Spotlight
Utility Working Conference and Vendor Technology Expo (UWC 2024)
August 4–7, 2024
Marco Island, FL|JW Marriott Marco Island
Standards Program
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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Latest News
BWXT will scout potential TRISO fuel production sites in Wyoming
BWX Technologies Inc. announced today that its Advanced Technologies subsidiary has signed a cooperation agreement with the state of Wyoming to evaluate locations and requirements for siting a potential new TRISO nuclear fuel fabrication facility in the state.
James T. Cronin, Bruce C. Slifer
Nuclear Technology | Volume 54 | Number 3 | September 1981 | Pages 393-397
First International Retran Meeting | Heat Transfer and Fluid Flow | doi.org/10.13182/NT81-A32785
Articles are hosted by Taylor and Francis Online.
An analysis of a boiling water reactor/4 plant response to a simultaneous closing of all main steam isolation valves (MSIVs) followed by a failure of the reactor protection system scram function was performed using the RETRAN-01 computer code. The purpose of the analysis was to determine what power level the plant must operate at such that the vessel pressure does not exceed 1500 psig during the postulated transient. No credit was taken for an anticipated transient without scram recirculation pump trip. Analyses were performed both at 100% flow conditions and at reduced core flow conditions. The results of the analyses show that the 1500-psig vessel pressure criterion is met for operating conditions of ≤85% power. Sensitivity studies were performed to identify important input parameters and modeling techniques. Steamline inertial effects, direct moderator heating fraction, feedback reactivity data, fuel rod gap conductance, MSIV closure rates, and upper downcomer modeling were investigated. The peak vessel pressure was found to be most sensitive to the value assumed for gap conductance and to the amount of liquid assumed to be in thermodynamic equilibrium with the vapor phase in the upper downcomer (region outside of the separators between the feedwater sparger and steam dryers). It is recommended that nonequilibrium effects in the upper downcomer region be investigated with models such as the RETRAN nonequilibrium pressurizer model.