Vol. 19 No. 3 (2022): Journal of Non Destructive Testing and Evaluation (JNDE), September 2022
Research Papers

Thermal Transient Measurements of Optical Periscope Lamp Assembly for Different Flow Rates using Thermal Imaging

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  • Menaka M,
  • Visweswaran P,
  • Sakthivel S,
  • Joseph Winston S,
  • Subramanian V,
  • Venkatraman B
Menaka M
IGCAR

Published 11-09-2022

Keywords

  • Optical Periscope, Prototype Fast Breeder Reactor, Non-Destructive Evaluation, Infrared Thermography

How to Cite

M, M., P, V., S, S., S, J. W., V, S., & B, V. (2022). Thermal Transient Measurements of Optical Periscope Lamp Assembly for Different Flow Rates using Thermal Imaging. Journal of Non-Destructive Testing and Evaluation (JNDE), 19(3), 26–29. Retrieved from https://jnde.isnt.in/index.php/JNDE/article/view/8

Copyright (c) 2022 Journal of Non-Destructive Testing and Evaluation (JNDE)

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This work is licensed under a Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.

Abstract

Optical Periscope is an instrument used for visual inspection if any obstacles are present in the direct line of sight of the observer. In a nuclear reactor where the visual inspection is limited by many factors, instruments like periscope are very vital for in-service inspections. In Prototype Fast Breeder Reactor (PFBR) the Periscope is used for the inspection of reactor internals at cover gas region above the liquid Sodium level. It is of 400mm diameter and 10m length housing image channel and two Xenon lamps for illuminating the region of inspection. The lamps operate at high voltage, 24kV and switches to 14V during regular operation. Due to the high voltage, excess heat generation was observed which was causing frequent failures of the lamp. Remote Handling & Irradiation Experiments Division (RHIED) of IGCAR carried out design modification for optimizing the proper coolant flow and other geometrical parameters. For validation of design modifications and ensuring better heat transfer efficiency Infrared Thermography was carried out on the lamp assembly of the periscope. The main objectives of present study is to evaluate thermal profiles of the system at different flow rates of coolant (800 lpm, 1000 lpm & 1200 lpm) and investigate thermal distribution across the fin. This paper discusses temperature measurement on the lamp and fin region of periscope assembly. The effect of flow rate to facilitate cooling of the lamp on the temperature distribution of the lamp assembly was investigated.

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References

  1. . “Development of Periscope for Prototype Fast Breeder Reactor”, M. Singh, R. V. Sakrikar, A. M. Kadu, D. V. Udupa and S. Kumar Presented in “Technical Meeting on Fast Reactors In-service Inspection and Repair: Status and Innovative Solutions” at IAEA, Vienna, Austria during 19-20 December 2011
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