Development of Advanced Instrumentation for Transient Testing

Jensen, Colby; Fleming, Austin

doi:10.1080/00295450.2019.1627123

Cited by 9 publications

(2 citation statements)

References 27 publications

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“…Hu proved the feasibility of monitoring the roof strata movement in coal mining by DFOS [ 25 ]. Delepine [ 26 ] and Jensen [ 27 ] realized the distributed temperature measurement of an underground nuclear waste storage and the nuclear reactor cooling circuit, respectively. The DFOS wild application in various fields under different tough conditions exhibits its mature and stable performance and shows great potential in solving the power transformer overheating problems.…”

Section: Introductionmentioning

confidence: 99%

Global Temperature Sensing for an Operating Power Transformer Based on Raman Scattering

Liu

et al. 2020

Sensors

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Traditional monitoring methods cannot obtain the overall thermal information for power transformers. To solve this problem, a distributed fiber optic sensor (DFOS) was creatively applied inside an operating 35 kV power transformer by highly integrating with the electromagnetic wires. Then, the transformer prototype with totally global sensing capability was successfully developed and it was qualified for power grid application through the strict ex-factory tests. The as designed optical fiber sensor works stably all the time with a temperature accuracy of ±0.2 °C and spatial positioning accuracy of 0.8 m. Based on the obtained internal temperature distribution, Gaussian convolution was further applied for the signal processing and hereby, the hotspots for all the windings and iron cores could be accurately traced. The hottest points were located at 89.1% (55 °C) of the high voltage winding height and 89.7% (77.5 °C) of the low voltage winding height. The actual precise hotspot location corrected the traditional cognition on the transformer windings and it would serve as an essential reference for the manufactures. This new nondestructive internal sensing and condition monitoring method also exhibits a promising future for the DFOS applying in the high-voltage electrical apparatus industry.

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Section: Introductionmentioning

confidence: 99%

Global Temperature Sensing for an Operating Power Transformer Based on Raman Scattering

Liu

et al. 2020

Sensors

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“…In addition to these next-generation computer codes, instrumentation capabilities and experimental hardware design have significantly improved since the shutdown of the TREAT reactor in 1994 (Ref. 10). Leveraging such advancements in computational tools, along with new experimental instrumentation and hardware developments, provides a pathway for the collection of and benchmarking against new experimental thermal-hydraulic data that have the nuclear quality assurance pedigree [i.e., The American Society of Mechanical Engineers (ASME) Nuclear Quality Assurance-1 (NQA-1) Fig.…”

Section: Introductionmentioning

confidence: 99%

Developing Separate Effects Transient Test Experiments Using an Out-of-Pile Flowing Water Loop

et al. 2020

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In 2017 the Transient Reactor Test (TREAT) Facility was restarted after having been placed in a standby state in 1994. The TREAT reactor's restart has since enabled the progressive development of new nuclear technologies within the United States that previously were outsourced to other countries. While the reactor's restart was a large feat worthy of recognition, the experimental use of its characteristics has required further development of an in-pile experimental infrastructure sufficient to support programmatic needs. This hardware has taken the form of capsule designs (compact and elongated) as well as loop concepts representing the phenomena of interest for a subset of the separate effects tests desired for each respective testing campaign. The transient testing program has been a large integrated effort that aligns with the U.S. Department of Energy's current needs. This study complements those programmatic elements by developing, fabricating, and demonstrating a full-scale flowing water loop in an out-of-pile environment. The goal of this effort is to develop a pragmatic understanding of the engineering capabilities and limitations associated with geometric form factors, metering technology, and controls logic under the representative thermal-hydraulic conditions that would be experienced within the TREAT reactor during an in-pile reactivity-initiated accident test. The outcomes of this study result in an evaluation of the conceptual design of a comprehensive flowing water loop, including objective figures of merit for comparing unique instrumentation and the basis for their selection during operations. These efforts directly contribute to and are required for the further advancement of transient testing capabilities within the United States.

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