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Fuel Cycle & Waste Management
Devoted to all aspects of the nuclear fuel cycle including waste management, worldwide. Division specific areas of interest and involvement include uranium conversion and enrichment; fuel fabrication, management (in-core and ex-core) and recycle; transportation; safeguards; high-level, low-level and mixed waste management and disposal; public policy and program management; decontamination and decommissioning environmental restoration; and excess weapons materials disposition.
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Utility Working Conference and Vendor Technology Expo (UWC 2024)
August 4–7, 2024
Marco Island, FL|JW Marriott Marco Island
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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.
Shigeaki Tsunoyama, Tohru Mitsutake, Shigeo Ebata, Shirley A. Sandoz
Nuclear Technology | Volume 65 | Number 3 | June 1984 | Pages 374-382
Technical Paper | Fission Reactor | doi.org/10.13182/NT84-A33392
Articles are hosted by Taylor and Francis Online.
Applying an autoregressive (AR) technique to a boiling water reactor stability test yields two kinds of reactor stability performance indexes. One is characterized by the neutron flux to reactor pressure open-loop transfer function. The other is characterized by the closed-loop transfer function. Studies were performed on these reactor core stability indexes, using a one-dimensional transient model. To simulate these two kinds of stability characteristics in the time domain, the input/output relation for the system considered is important. In both cases, the output variable is the neutron flux. For the input state variable, in the case of the open-loop stability index, reactor pressure was chosen and adopted as a boundary variable to enable neglecting the feedback due to change in the reactor dome pressure. In the case of the closed-loop stability index, the vessel steam flow to the main steamline was adopted to separate the reactor response from the main steamline. Employing this procedure, both stability indexes were estimated by the one-dimensional reactor transient model. Comparing these indexes to those evaluated by the AR fitting and Fourier transform of small perturbation test data, it was concluded that the one-dimensional transient model predicts well the open- and closed-loop stability performance. Further, it was shown that the open-loop index conventionally used is a somewhat conservative one.