A Novel Approach for Evaluating Surface Deposits on the Channel Wall Trepanned Graphite Samples

Research output: Chapter in Book/Report/Conference proceedingConference Contribution (Conference Proceeding)

Abstract

Samples have been trepanned from the fuel and interstitial channel walls of PGA graphite reactor cores of two operating Magnox gas cooled power stations after a period of service. These samples have been considered explicitly for the presence of deposits on the channel facing surfaces. A combination of focused ion beam milling and imaging has been used to determine the presence of such deposits and where present to make measurements of the thickness. These thicknesses vary from a few nanometres to tens of micrometres. In addition, both the chemical composition and chemical state have been investigated using energy dispersive X-ray microanalysis in a scanning electron microscope and Raman spectroscopy respectively. The results are discussed by comparing the microstructure, composition, chemical state and origins of the deposits with the parent graphite.
Original languageEnglish
Title of host publicationModelling and Measuring Reactor Core Graphite Properties and Performance
EditorsGareth Neighbour
PublisherRoyal Society of Chemistry
Pages99-109
Number of pages11
ISBN (Electronic)978-1-84973-517-9
DOIs
Publication statusPublished - 2013

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