A Study on Soluble Boron Control During Load-Follow Operation Using Sliding Mode Observer in APR1400

Husam Khalefih; Yonghee Kim

doi:10.1007/978-3-031-64362-0_50

A Study on Soluble Boron Control During Load-Follow Operation Using Sliding Mode Observer in APR1400

Husam Khalefih
, Yonghee Kim^*

^*Corresponding author for this work

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution › peer-review

Abstract

During daily load-follow operation, the xenon concentration in the reactor changes over time due to reactor power variation. To compensate for this change, the soluble boron concentration in the core is adjusted through dilution or boration. However, since xenon is not directly measurable in the reactor, the sliding mode observer is utilized to estimate the xenon concentration prior to the daily load-follow operation. The robustness of the sliding mode observer relies on accurate estimation of the observer gains used in the model, ensuring the sliding surface is reached within a finite time. The results indicate good agreement between the observed xenon concentration and the actual xenon concentration variation in the core, calculated using time-dependent xenon concentration simulation. This analysis was conducted using a two-step procedure: cross-section evaluation using the SERPENT continuous energy Monte Carlo code, and whole core calculations to generate the lumped parameters were performed using an in-house diffusion code called KANT.

Original language	English
Title of host publication	Challenges and Recent Advancements in Nuclear Energy Systems - Proceedings of Saudi International Conference on Nuclear Power Engineering SCOPE
Editors	Afaque Shams, Khaled Al-Athel, Iztok Tiselj, Andreas Pautz, Tomasz Kwiatkowski
Publisher	Springer Science and Business Media Deutschland GmbH
Pages	553-561
Number of pages	9
ISBN (Print)	9783031643613
DOIs	https://doi.org/10.1007/978-3-031-64362-0_50
State	Published - 2024
Externally published	Yes
Event	Saudi International Conference on Nuclear Power Engineering, SCOPE 2023 - Dhahran, Saudi Arabia Duration: 13 Nov 2023 → 15 Nov 2023

Publication series

Name	Lecture Notes in Mechanical Engineering
ISSN (Print)	2195-4356
ISSN (Electronic)	2195-4364

Conference

Conference	Saudi International Conference on Nuclear Power Engineering, SCOPE 2023
Country/Territory	Saudi Arabia
City	Dhahran
Period	13/11/23 → 15/11/23

Bibliographical note

Publisher Copyright:
© The Author(s), under exclusive license to Springer Nature Switzerland AG 2024.

Keywords

APR1400
Boron
LFO
Sliding Mode Observer
Xenon

ASJC Scopus subject areas

Automotive Engineering
Aerospace Engineering
Mechanical Engineering
Fluid Flow and Transfer Processes

Access to Document

10.1007/978-3-031-64362-0_50

Cite this

Khalefih, H., & Kim, Y. (2024). A Study on Soluble Boron Control During Load-Follow Operation Using Sliding Mode Observer in APR1400. In A. Shams, K. Al-Athel, I. Tiselj, A. Pautz, & T. Kwiatkowski (Eds.), Challenges and Recent Advancements in Nuclear Energy Systems - Proceedings of Saudi International Conference on Nuclear Power Engineering SCOPE (pp. 553-561). (Lecture Notes in Mechanical Engineering). Springer Science and Business Media Deutschland GmbH. https://doi.org/10.1007/978-3-031-64362-0_50

Khalefih, Husam ; Kim, Yonghee. / A Study on Soluble Boron Control During Load-Follow Operation Using Sliding Mode Observer in APR1400. Challenges and Recent Advancements in Nuclear Energy Systems - Proceedings of Saudi International Conference on Nuclear Power Engineering SCOPE. editor / Afaque Shams ; Khaled Al-Athel ; Iztok Tiselj ; Andreas Pautz ; Tomasz Kwiatkowski. Springer Science and Business Media Deutschland GmbH, 2024. pp. 553-561 (Lecture Notes in Mechanical Engineering).

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title = "A Study on Soluble Boron Control During Load-Follow Operation Using Sliding Mode Observer in APR1400",

abstract = "During daily load-follow operation, the xenon concentration in the reactor changes over time due to reactor power variation. To compensate for this change, the soluble boron concentration in the core is adjusted through dilution or boration. However, since xenon is not directly measurable in the reactor, the sliding mode observer is utilized to estimate the xenon concentration prior to the daily load-follow operation. The robustness of the sliding mode observer relies on accurate estimation of the observer gains used in the model, ensuring the sliding surface is reached within a finite time. The results indicate good agreement between the observed xenon concentration and the actual xenon concentration variation in the core, calculated using time-dependent xenon concentration simulation. This analysis was conducted using a two-step procedure: cross-section evaluation using the SERPENT continuous energy Monte Carlo code, and whole core calculations to generate the lumped parameters were performed using an in-house diffusion code called KANT.",

keywords = "APR1400, Boron, LFO, Sliding Mode Observer, Xenon",

author = "Husam Khalefih and Yonghee Kim",

note = "Publisher Copyright: {\textcopyright} The Author(s), under exclusive license to Springer Nature Switzerland AG 2024.; Saudi International Conference on Nuclear Power Engineering, SCOPE 2023 ; Conference date: 13-11-2023 Through 15-11-2023",

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doi = "10.1007/978-3-031-64362-0\_50",

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series = "Lecture Notes in Mechanical Engineering",

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Khalefih, H & Kim, Y 2024, A Study on Soluble Boron Control During Load-Follow Operation Using Sliding Mode Observer in APR1400. in A Shams, K Al-Athel, I Tiselj, A Pautz & T Kwiatkowski (eds), Challenges and Recent Advancements in Nuclear Energy Systems - Proceedings of Saudi International Conference on Nuclear Power Engineering SCOPE. Lecture Notes in Mechanical Engineering, Springer Science and Business Media Deutschland GmbH, pp. 553-561, Saudi International Conference on Nuclear Power Engineering, SCOPE 2023, Dhahran, Saudi Arabia, 13/11/23. https://doi.org/10.1007/978-3-031-64362-0_50

A Study on Soluble Boron Control During Load-Follow Operation Using Sliding Mode Observer in APR1400. / Khalefih, Husam; Kim, Yonghee.
Challenges and Recent Advancements in Nuclear Energy Systems - Proceedings of Saudi International Conference on Nuclear Power Engineering SCOPE. ed. / Afaque Shams; Khaled Al-Athel; Iztok Tiselj; Andreas Pautz; Tomasz Kwiatkowski. Springer Science and Business Media Deutschland GmbH, 2024. p. 553-561 (Lecture Notes in Mechanical Engineering).

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution › peer-review

TY - GEN

T1 - A Study on Soluble Boron Control During Load-Follow Operation Using Sliding Mode Observer in APR1400

AU - Khalefih, Husam

AU - Kim, Yonghee

N1 - Publisher Copyright: © The Author(s), under exclusive license to Springer Nature Switzerland AG 2024.

PY - 2024

Y1 - 2024

N2 - During daily load-follow operation, the xenon concentration in the reactor changes over time due to reactor power variation. To compensate for this change, the soluble boron concentration in the core is adjusted through dilution or boration. However, since xenon is not directly measurable in the reactor, the sliding mode observer is utilized to estimate the xenon concentration prior to the daily load-follow operation. The robustness of the sliding mode observer relies on accurate estimation of the observer gains used in the model, ensuring the sliding surface is reached within a finite time. The results indicate good agreement between the observed xenon concentration and the actual xenon concentration variation in the core, calculated using time-dependent xenon concentration simulation. This analysis was conducted using a two-step procedure: cross-section evaluation using the SERPENT continuous energy Monte Carlo code, and whole core calculations to generate the lumped parameters were performed using an in-house diffusion code called KANT.

AB - During daily load-follow operation, the xenon concentration in the reactor changes over time due to reactor power variation. To compensate for this change, the soluble boron concentration in the core is adjusted through dilution or boration. However, since xenon is not directly measurable in the reactor, the sliding mode observer is utilized to estimate the xenon concentration prior to the daily load-follow operation. The robustness of the sliding mode observer relies on accurate estimation of the observer gains used in the model, ensuring the sliding surface is reached within a finite time. The results indicate good agreement between the observed xenon concentration and the actual xenon concentration variation in the core, calculated using time-dependent xenon concentration simulation. This analysis was conducted using a two-step procedure: cross-section evaluation using the SERPENT continuous energy Monte Carlo code, and whole core calculations to generate the lumped parameters were performed using an in-house diffusion code called KANT.

KW - APR1400

KW - Boron

KW - LFO

KW - Sliding Mode Observer

KW - Xenon

UR - https://www.scopus.com/pages/publications/85200783953

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DO - 10.1007/978-3-031-64362-0_50

M3 - Conference contribution

AN - SCOPUS:85200783953

SN - 9783031643613

T3 - Lecture Notes in Mechanical Engineering

SP - 553

EP - 561

BT - Challenges and Recent Advancements in Nuclear Energy Systems - Proceedings of Saudi International Conference on Nuclear Power Engineering SCOPE

A2 - Shams, Afaque

A2 - Al-Athel, Khaled

A2 - Tiselj, Iztok

A2 - Pautz, Andreas

A2 - Kwiatkowski, Tomasz

PB - Springer Science and Business Media Deutschland GmbH

T2 - Saudi International Conference on Nuclear Power Engineering, SCOPE 2023

Y2 - 13 November 2023 through 15 November 2023

ER -

Khalefih H, Kim Y. A Study on Soluble Boron Control During Load-Follow Operation Using Sliding Mode Observer in APR1400. In Shams A, Al-Athel K, Tiselj I, Pautz A, Kwiatkowski T, editors, Challenges and Recent Advancements in Nuclear Energy Systems - Proceedings of Saudi International Conference on Nuclear Power Engineering SCOPE. Springer Science and Business Media Deutschland GmbH. 2024. p. 553-561. (Lecture Notes in Mechanical Engineering). doi: 10.1007/978-3-031-64362-0_50

A Study on Soluble Boron Control During Load-Follow Operation Using Sliding Mode Observer in APR1400

Abstract

Publication series

Conference

Bibliographical note

Keywords

ASJC Scopus subject areas

Access to Document

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