Solid-solid conductance in nuclear fuel: An assessment of it in-code models performance

Herranz, L.E.; Tigeras, A.

doi:10.1016/j.pnucene.2009.09.018

Cited by 4 publications

(1 citation statement)

References 14 publications

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“…High-burnup is another interest of the nuclear power plants operators and researches about new models are desirable and can be found in the literature [4,5]. In this paper the fthcon.f subroutine, contained in the MATPRO package of the FRAPCON-3.4 [6,7] code was modified to include a new model proposed by Dias [8,9].…”

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confidence: 99%

Evaluation of Nuclear Fuel Centerline Temperature Using New UO2 Thermal Conductivity Models

Palma¹,

Mesquita²,

Marinho³

et al. 2014

JEPE

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Abstract:The nuclear industry needs of prediction of behavior and life-time, for a wide range of normal, off-normal and accident conditions for safe and economic operation. Among different thermo-mechanical properties that can be predictable, the knowledge on the radial temperature distribution of the UO 2 (uranium dioxide) nuclear fuel during the operation of nuclear reactors is essential for safety as different mechanical and thermal-hydraulic thresholds should be respected. One of the attributes of the Brazilian CNEN (Nuclear Energy Commission) is to assess the performance of the fuel rods used in these reactors in high-burnup regimes. The effective removal of the heat generated in the fuel rods constitutes one of the primary points to consider in the design of nuclear reactors. One of the important physical parameters in the study of heat conduction from the nuclear fuel to the coolant in a PWR (pressurized water reactor) is its thermal conductivity. It is therefore desirable that the empirical models, updated for the calculation of thermal conductivity in the fuel region be developed from new sets of experimental data from the irradiated fuel rods in controlled environments. This paper presents the obtained results of implementing of a new model for thermal conductivity of the UO 2 in the FRAPCON code.

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confidence: 99%