Estimation of elastic properties of nuclear fuel material using longitudinal ultrasonic velocity – A new approach

Phani, Kalyan Kumar; Sanyal, Dipayan; Sengupta, Arijit

doi:10.1016/j.jnucmat.2006.12.045

Cited by 36 publications

(21 citation statements)

References 19 publications

(41 reference statements)

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“…Some of these sources include measurement uncertainty, inaccuracy in the models that relate measurements to degradation, uncertainty in future stress conditions, inaccuracy in prognostic models to extrapolate degradation measures, and uncertainty in the POF evaluation method. Methods for uncertainty assessment in prognostics are being examined in the research community (Phani et al 2007;Sankararaman et al 2011;Solstad and Van Nieuwenhove 2011;Wang 2011;Wang et al 2012). These range from closed-form solutions to probabilistic approaches such as the bootstrap technique and Monte Carlo simulations.…”

Section: Estimating Failure Probabilitiesmentioning

confidence: 99%

Technical Report on Preliminary Methodology for Enhancing Risk Monitors with Integrated Equipment Condition Assessment

Ramuhalli¹,

Coles²,

Coble³

et al. 2013

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Executive SummaryAdvanced small modular reactors (AdvSMRs) may provide a longer-term alternative to traditional light-water reactors and SMRs based on integral pressurized water reactor concepts currently being considered. AdvSMRs are designed to incorporate multiple modules (which may or may not have shared components and structures) at a single location, comprising a full "plant." AdvSMR operation differs fundamentally from full-size plants because the smaller plants may be used for load-following or peakdemand power generation, instead of baseload generation. AdvSMRs are also being considered for dualuse, where process heat would be used for both electricity generation and another purpose such as hydrogen production or water desalination, shown in Figure Enhancing affordability of AdvSMRs will be critical to ensuring wider deployment. Although some of the loss of economies of scale inherent to AdvSMRs can be recovered, controllable day-to-day costs of AdvSMRs will be dominated by operation and maintenance (O&M) costs.Technologies that help characterize real-time risk are important to controlling O&M costs and improving affordability of AdvSMRs. Given the possibility of frequently changing plant configurations in AdvSMRs, advanced plant configuration information, equipment condition information, and risk monitors are needed to support real-time decisions on O&M. For this purpose, approaches are needed to integrate these three elements in a manner that provides a measure of risk that is customized for each AdvSMR unit, and accounts for the specific operational history of the unit. By integrating technologies for condition assessment with risk monitors, asset optimization and improved economics of AdvSMRs may be enabled by:• Maximizing generation by assessing the potential impact of taking key components offline for testing or maintenance, iv• Supporting reduced O&M staff by aiding in optimization of O&M planning (specifically by assessing the contribution of individual components to changes in risk and using this information for scheduling maintenance activities),• Enabling real-time decisions on stress-relief for risk-significant equipment susceptible to degradation and damage, and• Supporting potential remote siting by providing early warning of potential increases in plant risk.This report describes research results from an initial methodology for such enhanced risk monitors (ERMs) that integrate real-time information about equipment condition and probability of failure (POF) into risk monitors to provide an assessment of dynamic risk as plant equipment ages. This integration occurs at the level of the POF within risk monitors.Risk monitors extend probabilistic risk assessment (PRA) frameworks by incorporating the actual and dynamic plant configuration (e.g., equipment availability, operating regimes, and environmental conditions) into the risk assessment. PRA is itself a systematic safety analysis methodology that follows four steps: identify undesirable consequences (e.g., reactor unavailability, core da...

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Section: Estimating Failure Probabilitiesmentioning

confidence: 99%

Technical Report on Preliminary Methodology for Enhancing Risk Monitors with Integrated Equipment Condition Assessment

Ramuhalli¹,

Coles²,

Coble³

et al. 2013

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“…Using a pulser/receiver system (Model 5072PR, Olympus, Waltham, MA), both longitudinal velocity ܸ and shear velocity ܸ ௦ of the pellets were measured. The Young's modulus is then calculated by the following equation [18]:…”

Section: Characterization Methodsmentioning

confidence: 99%

Spark plasma sintering of diamond-reinforced uranium dioxide composite fuel pellets

Chen

Subhash

Tulenko

2015

Nuclear Engineering and Design

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“…22 PIEs have successfully shown that fuel microstructural parameters, such as porosity and grain size, can be correlated to ultrasonic velocity. 23 According to Villard, 24 frequency requirements for such measurements are restricted to greater than 10 MHz. However, lower frequencies can be used for some applications, such as ultrasonic thermometry, where frequency requirements may be 100 -150 kHz or lower.…”

Section: Task 1: Ultrasonic Transducer Irradiation Testmentioning

confidence: 99%

NEET In-Pile Ultrasonic Sensor Enablement-FY-2013

Daw¹,

Rempe²,

Palmer³

et al. 2013

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SUMMARYSeveral programs funded by the Department of Energy Office of Nuclear Energy (DOE-NE), such as the Fuel Cycle Research and Development, Advanced Reactor Concepts, Light Water Reactor Sustainability, and Next Generation Nuclear Plant programs, are investigating new fuels and materials for advanced and existing reactors. A key objective of such programs is to understand the performance of these fuels and materials when irradiated. The Nuclear Energy Enabling Technology (NEET) Advanced Sensors and Instrumentation (ASI) in-pile instrumentation development activities are focused upon addressing cross-cutting needs for DOE-NE irradiation testing by providing higher fidelity, real-time data, with increased accuracy and resolution from smaller, compact sensors that are less intrusive.Ultrasonic technologies offer the potential to measure a range of parameters, including geometry changes, temperature, crack initiation and growth, gas pressure and composition, and microstructural changes under harsh irradiation test conditions. There are two primary issues that currently limit in-pile deployment of ultrasonic sensors. The first is transducer survivability. The ability of ultrasonic transducer materials to maintain their useful properties during an irradiation must be demonstrated. The second issue is signal processing. Ultrasonic testing is typically performed in a lab or field environment, where the sensor and sample are accessible. The harsh nature of in-pile testing and the variety of measurements that are desired demand that an enhanced signal processing capability be developed to make in-pile ultrasonic sensors viable. To address these issues, the NEET ASI program is funding the Ultrasonic Transducer Irradiation and Signal Processing Enhancements project, which is a collaborative effort between the Idaho National Laboratory, the Pacific Northwest National Laboratory, the Argonne National Laboratory, and the Pennsylvania State University (PSU). As summarized within this document, significant work has been accomplished during the first two years of this three year project:• Transducer Irradiation Test -The first task of this project supports efforts to develop a test capsule design and define irradiation conditions for evaluating most promising candidate piezoelectric and magnetostrictive transducer materials and designs. In July FY-2012, the ATR NSUF announced that a proposal led by PSU for irradiating ultrasonic transducers was selected, and the irradiation would occur in the Massachusetts Institute of Technology Nuclear Research Reactor (MITR). Subsequent project efforts have focused on developing a capsule design and on identifying appropriate test conditions, identifying transducers for inclusion in the capsule, appropriate post-irradiation examinations, and performing out-of-pile laboratory tests needed to support the irradiation. As documented in this report, the irradiation test builds on prior research and exceeds previous tests in terms of the number of materials tested and accumulated fluence. The pur...

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Estimation of elastic properties of nuclear fuel material using longitudinal ultrasonic velocity – A new approach

Cited by 36 publications

References 19 publications

Technical Report on Preliminary Methodology for Enhancing Risk Monitors with Integrated Equipment Condition Assessment

Technical Report on Preliminary Methodology for Enhancing Risk Monitors with Integrated Equipment Condition Assessment

Spark plasma sintering of diamond-reinforced uranium dioxide composite fuel pellets

NEET In-Pile Ultrasonic Sensor Enablement-FY-2013

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