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

Peter J Heard; MR Wootton; Peter E J Flewitt

doi:10.1039/9781849735179-00099

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

Peter J Heard, MR Wootton, Peter E J Flewitt

Research output: Chapter in Book/Report/Conference proceeding › Conference 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 language	English
Title of host publication	Modelling and Measuring Reactor Core Graphite Properties and Performance
Editors	Gareth Neighbour
Publisher	Royal Society of Chemistry
Pages	99-109
Number of pages	11
ISBN (Electronic)	978-1-84973-517-9
DOIs	https://doi.org/10.1039/9781849735179-00099
Publication status	Published - 2013

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@inproceedings{1d8562334da54564b9dd73e912186deb,

title = "A Novel Approach for Evaluating Surface Deposits on the Channel Wall Trepanned Graphite Samples",

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.",

author = "Heard, {Peter J} and MR Wootton and Flewitt, {Peter E J}",

year = "2013",

doi = "10.1039/9781849735179-00099",

language = "English",

pages = "99--109",

editor = "Gareth Neighbour",

booktitle = "Modelling and Measuring Reactor Core Graphite Properties and Performance",

publisher = "Royal Society of Chemistry",

address = "United Kingdom",

}

A Novel Approach for Evaluating Surface Deposits on the Channel Wall Trepanned Graphite Samples. / Heard, Peter J; Wootton, MR; Flewitt, Peter E J.

Modelling and Measuring Reactor Core Graphite Properties and Performance. ed. / Gareth Neighbour. Royal Society of Chemistry, 2013. p. 99-109.

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

TY - GEN

T1 - A Novel Approach for Evaluating Surface Deposits on the Channel Wall Trepanned Graphite Samples

AU - Heard, Peter J

AU - Wootton, MR

AU - Flewitt, Peter E J

PY - 2013

Y1 - 2013

N2 - 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.

AB - 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.

U2 - 10.1039/9781849735179-00099

DO - 10.1039/9781849735179-00099

M3 - Conference Contribution (Conference Proceeding)

SP - 99

EP - 109

BT - Modelling and Measuring Reactor Core Graphite Properties and Performance

A2 - Neighbour, Gareth

PB - Royal Society of Chemistry

ER -

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

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