Title: Radiation heating of VVER-4440 thermocouple
Authors: Lovecký, Martin
Šik, Jan
Citation: LOVECKÝ, M., ŠIK, J. Radiation heating of VVER-4440 thermocouple. Kerntechnik, 2020, roč. 85, č. 4, s. 301-304. ISSN 0932-3902.
Issue Date: 2020
Publisher: Carl Hanser Verlag
Document type: článek
article
URI: 2-s2.0-85093959337
http://hdl.handle.net/11025/42213
ISSN: 0932-3902
Keywords in different language: radiation heating;Monte Carlo;VVER-440;thermocouple
Abstract in different language: Thermocouple located near the coolant outlet of the fuel assembly head may indicate a temperature biased by radiation heating and subsequently affect accuracy of incore measurements. The analysis splits into two parts; coupled eutronphoton Monte Carlo transport to determine radiation heating that serves as the input to heat transfer calculation resulting in temperature bias evaluation. Various nuclear reactions contribute to radiation heating in the active volume of the thermocouple steel. Monte Carlo transport calculation of radiation heating for average fuel assembly in one of latest Dukovany NPP cycles was performed with MCNP code. Heating power was compared to values published previously for Paks and Kola NPPs. Heat transfer calculations were performed with TEPLO code developed in ŠKODA JS. Radiation heating can be considered as negligible if the axial shift between thermocouple active part and thermocouple socket is below 15 mm.
Rights: Plný text je přístupný v rámci univerzity přihlášeným uživatelům
© Carl Hanser Verlag
Appears in Collections:Články / Articles (RICE)
OBD

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Please use this identifier to cite or link to this item: http://hdl.handle.net/11025/42213

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