Selecting a Turbulence Model for Calculating the Temperature Profile at the Surface of VVER-1000 Fuel Assemblies in the NPP Spent Fuel Pool

Voronina, A.V.; Павлов, С. В.

doi:10.26583/npe.2021.1.08

Cited by 1 publication

(1 citation statement)

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“…Use of CFD simulation involves a problem of choosing the particular turbulence model and estimating the degree of confidence of the results obtained on its basis. It is shown in (Voronina and Pavlov 2021a) that an RNG k-ε model is recommended to be used to simulate natural convection near the FA surface.…”

Section: Mathematical Model Of the Pulseecho Technique Acoustic Pathmentioning

confidence: 99%

Ultrasonic monitoring of the VVER-1000 FA form change

Pavlov

Amosov³

2022

NUCET

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A procedure has been developed to determine the geometrical parameters of fuel assemblies (FA) by an ultrasonic pulse-echo technique used for all types of light-water reactor FAs. The measurement of geometrical parameters is achieved through the pairwise installation of ultrasonic transducers opposite the FA spacer grid faces at a distance of not more than a half of the transducer acoustic field near-region length such that the acoustic axes of the pairwise transducers are parallel to each other. The advantages of the presented technique is that it enables monitoring of any FA modifications, including the VVER reactor assemblies with a different number of spacer grids. The paper presents a mathematical model of the acoustic path developed in a geometrical acoustics approximation and its verification results. The model was used for computational and experimental studies of the ultrasonic test technique, and engineering formulas have been developed to calculate the errors of the transducer-measured distance to the FA surface. A code has been developed to simulate the FA form change monitoring and can be used to design new monitoring systems. The developed technique to determine the VVER-1000 FA geometrical parameters was introduced at units 1 and 2 of the Temelin NPP, the Czech Republic, for the TVSA-T FA form change monitoring. The successful use of the proposed technique makes it possible to recommend it for use in inspection benches at other NPPs.

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Section: Mathematical Model Of the Pulseecho Technique Acoustic Pathmentioning

confidence: 99%

Ultrasonic monitoring of the VVER-1000 FA form change

Pavlov

Amosov³

2022

NUCET

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Selecting a Turbulence Model for Calculating the Temperature Profile at the Surface of VVER-1000 Fuel Assemblies in the NPP Spent Fuel Pool

Abstract: И з в е с т и я в у з о в • Я д е р н а я э н е р г е т и к а • № 1 • 2 0 2 1 83

Cited by 1 publication

References 5 publications

Ultrasonic monitoring of the VVER-1000 FA form change

Ultrasonic monitoring of the VVER-1000 FA form change

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Selecting a Turbulence Model for Calculating the Temperature Profile at the Surface of VVER-1000 Fuel Assemblies in the NPP Spent Fuel Pool

Abstract: И з в е с т и я в у з о в • Я д е р н а я э н е р г е т и к а • № 1 • 2 0 2 1 83

Cited by 1 publication

References 5 publications

﻿Ultrasonic monitoring of the VVER-1000 FA form change

﻿Ultrasonic monitoring of the VVER-1000 FA form change

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Ultrasonic monitoring of the VVER-1000 FA form change

Ultrasonic monitoring of the VVER-1000 FA form change