Fuel channel bore estimation for onload pressurised fuel grab load trace data

Research output: Contribution to conferencePaper

Abstract

Accurate fuel channel bore estimation enables information about the health of the graphite core of an advanced gas-cooled reactor to be inferred. This was extensively explored previously for offload depressurised fuel grab load trace (FGLT) data: by isolating the frictional component of the FGLT and using inspection data as a ground truth, a linear regression model was trained to estimate the fuel channel bore. However, when data gathered during onload refuelling has the added complication of the interaction between the fuel assembly and coolant gas, the same process cannot be used. This paper describes the process for removing the aerodynamic effects of the coolant gas in the core from onload pressurised FGLT data. This effect cannot be directly measured, so initially, an empirical model was created by comparing the response from both offload depressurised and onload pressurised events. This model is then used to estimate the offload equivalent FGLT response, and by using a bore estimation model, trained on offload data, it is possible to produce bore estimations for onload FGLT data.
LanguageEnglish
Number of pages8
Publication statusAccepted/In press - 1 Nov 2018
Event6th EDF Energy Nuclear Graphite Conference - kendal, United Kingdom
Duration: 15 Oct 201818 Oct 2018

Conference

Conference6th EDF Energy Nuclear Graphite Conference
CountryUnited Kingdom
Citykendal
Period15/10/1818/10/18

Fingerprint

Channel estimation
Coolants
Gas cooled reactors
Gases
Linear regression
Aerodynamics
Graphite
Inspection
Health

Keywords

  • Fuel Grab Load Trace
  • bore estimation
  • modelling
  • advanced gas-cooled reactor
  • monitoring

Cite this

Young, A., Aylward, W., Murray, P., West, G., McArthur, S., & Rudge, A. (Accepted/In press). Fuel channel bore estimation for onload pressurised fuel grab load trace data. Paper presented at 6th EDF Energy Nuclear Graphite Conference, kendal, United Kingdom.
Young, Andrew ; Aylward, William ; Murray, Paul ; West, Graeme ; McArthur, Stephen ; Rudge, Anna. / Fuel channel bore estimation for onload pressurised fuel grab load trace data. Paper presented at 6th EDF Energy Nuclear Graphite Conference, kendal, United Kingdom.8 p.
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keywords = "Fuel Grab Load Trace, bore estimation, modelling, advanced gas-cooled reactor, monitoring",
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Young, A, Aylward, W, Murray, P, West, G, McArthur, S & Rudge, A 2018, 'Fuel channel bore estimation for onload pressurised fuel grab load trace data' Paper presented at 6th EDF Energy Nuclear Graphite Conference, kendal, United Kingdom, 15/10/18 - 18/10/18, .

Fuel channel bore estimation for onload pressurised fuel grab load trace data. / Young, Andrew; Aylward, William; Murray, Paul; West, Graeme; McArthur, Stephen; Rudge, Anna.

2018. Paper presented at 6th EDF Energy Nuclear Graphite Conference, kendal, United Kingdom.

Research output: Contribution to conferencePaper

TY - CONF

T1 - Fuel channel bore estimation for onload pressurised fuel grab load trace data

AU - Young, Andrew

AU - Aylward, William

AU - Murray, Paul

AU - West, Graeme

AU - McArthur, Stephen

AU - Rudge, Anna

PY - 2018/11/1

Y1 - 2018/11/1

N2 - Accurate fuel channel bore estimation enables information about the health of the graphite core of an advanced gas-cooled reactor to be inferred. This was extensively explored previously for offload depressurised fuel grab load trace (FGLT) data: by isolating the frictional component of the FGLT and using inspection data as a ground truth, a linear regression model was trained to estimate the fuel channel bore. However, when data gathered during onload refuelling has the added complication of the interaction between the fuel assembly and coolant gas, the same process cannot be used. This paper describes the process for removing the aerodynamic effects of the coolant gas in the core from onload pressurised FGLT data. This effect cannot be directly measured, so initially, an empirical model was created by comparing the response from both offload depressurised and onload pressurised events. This model is then used to estimate the offload equivalent FGLT response, and by using a bore estimation model, trained on offload data, it is possible to produce bore estimations for onload FGLT data.

AB - Accurate fuel channel bore estimation enables information about the health of the graphite core of an advanced gas-cooled reactor to be inferred. This was extensively explored previously for offload depressurised fuel grab load trace (FGLT) data: by isolating the frictional component of the FGLT and using inspection data as a ground truth, a linear regression model was trained to estimate the fuel channel bore. However, when data gathered during onload refuelling has the added complication of the interaction between the fuel assembly and coolant gas, the same process cannot be used. This paper describes the process for removing the aerodynamic effects of the coolant gas in the core from onload pressurised FGLT data. This effect cannot be directly measured, so initially, an empirical model was created by comparing the response from both offload depressurised and onload pressurised events. This model is then used to estimate the offload equivalent FGLT response, and by using a bore estimation model, trained on offload data, it is possible to produce bore estimations for onload FGLT data.

KW - Fuel Grab Load Trace

KW - bore estimation

KW - modelling

KW - advanced gas-cooled reactor

KW - monitoring

M3 - Paper

ER -

Young A, Aylward W, Murray P, West G, McArthur S, Rudge A. Fuel channel bore estimation for onload pressurised fuel grab load trace data. 2018. Paper presented at 6th EDF Energy Nuclear Graphite Conference, kendal, United Kingdom.