Group Constants Generation Based on NECP-MCX Monte Carlo Code

Shuai Qin; Qingming He; Jiahe Bai; Wenchang Dong; Liangzhi Cao; Hongchun Wu

doi:10.1007/978-981-99-1023-6_9

Group Constants Generation Based on NECP-MCX Monte Carlo Code

Shuai Qin
, Qingming He
, Jiahe Bai
, Wenchang Dong
, Liangzhi Cao
, Hongchun Wu

School of Energy and Power Engineering

Xi'an Jiaotong University

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

Abstract

The reliability of few-group constants generated by lattice physics calculation is significant for the accuracy of the conventional two-step method in neutronics calculation. The deterministic method is preferred in the lattice calculation due to its efficiency. However, it is difficult for the deterministic method to treat the resonance self-shielding effect accurately and handle complex geometries. Compared to the deterministic method, the Monte Carlo method has the characteristics of using continuous-energy cross section and the powerful capability of geometric modeling. Therefore, the Monte Carlo particle transport code NECP-MCX is extended in this study to generate assembly-homogenized few-group constants. The cumulative migration method is adopted to generate the accurate diffusion coefficient and the leakage correction is performed using the homogeneous fundamental mode approximation. For the verification of the generated few-group constants, a code sequence named MCX-SPARK is built based on NECP-MCX and a core analysis code SPARK to perform the two-step calculation. The physics start-up test of the HPR1000 reactor is simulated using the MCX-SPARK sequence. The results from MCX-SPARK agree well with the results from the design report and a deterministic two-step code Bamboo-C. It is concluded that the NECP-MCX has the ability to generate accurate few-group constants.

Original language	English
Title of host publication	Proceedings of the 23rd Pacific Basin Nuclear Conference, PBNC 2022
Editors	Chengmin Liu
Publisher	Springer Science and Business Media Deutschland GmbH
Pages	86-97
Number of pages	12
ISBN (Print)	9789819910229
DOIs	https://doi.org/10.1007/978-981-99-1023-6_9
State	Published - 2023
Event	23rd Pacific Basin Nuclear Conference, PBNC 2022 - Beijing, China Duration: 1 Nov 2022 → 4 Nov 2022

Publication series

Name	Springer Proceedings in Physics
Volume	283
ISSN (Print)	0930-8989
ISSN (Electronic)	1867-4941

Conference

Conference	23rd Pacific Basin Nuclear Conference, PBNC 2022
Country/Territory	China
City	Beijing
Period	1/11/22 → 4/11/22

Keywords

Few-group constant
HPR1000
Monte Carlo
NECP-MCX
Two-step

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10.1007/978-981-99-1023-6_9

Cite this

@inproceedings{f88251197106459094b2fa74167b53b9,

title = "Group Constants Generation Based on NECP-MCX Monte Carlo Code",

abstract = "The reliability of few-group constants generated by lattice physics calculation is significant for the accuracy of the conventional two-step method in neutronics calculation. The deterministic method is preferred in the lattice calculation due to its efficiency. However, it is difficult for the deterministic method to treat the resonance self-shielding effect accurately and handle complex geometries. Compared to the deterministic method, the Monte Carlo method has the characteristics of using continuous-energy cross section and the powerful capability of geometric modeling. Therefore, the Monte Carlo particle transport code NECP-MCX is extended in this study to generate assembly-homogenized few-group constants. The cumulative migration method is adopted to generate the accurate diffusion coefficient and the leakage correction is performed using the homogeneous fundamental mode approximation. For the verification of the generated few-group constants, a code sequence named MCX-SPARK is built based on NECP-MCX and a core analysis code SPARK to perform the two-step calculation. The physics start-up test of the HPR1000 reactor is simulated using the MCX-SPARK sequence. The results from MCX-SPARK agree well with the results from the design report and a deterministic two-step code Bamboo-C. It is concluded that the NECP-MCX has the ability to generate accurate few-group constants.",

keywords = "Few-group constant, HPR1000, Monte Carlo, NECP-MCX, Two-step",

author = "Shuai Qin and Qingming He and Jiahe Bai and Wenchang Dong and Liangzhi Cao and Hongchun Wu",

note = "Publisher Copyright: {\textcopyright} 2023, The Author(s).; 23rd Pacific Basin Nuclear Conference, PBNC 2022 ; Conference date: 01-11-2022 Through 04-11-2022",

year = "2023",

doi = "10.1007/978-981-99-1023-6\_9",

language = "英语",

isbn = "9789819910229",

series = "Springer Proceedings in Physics",

publisher = "Springer Science and Business Media Deutschland GmbH",

pages = "86--97",

editor = "Chengmin Liu",

booktitle = "Proceedings of the 23rd Pacific Basin Nuclear Conference, PBNC 2022",

}

Qin, S, He, Q, Bai, J, Dong, W, Cao, L & Wu, H 2023, Group Constants Generation Based on NECP-MCX Monte Carlo Code. in C Liu (ed.), Proceedings of the 23rd Pacific Basin Nuclear Conference, PBNC 2022. Springer Proceedings in Physics, vol. 283, Springer Science and Business Media Deutschland GmbH, pp. 86-97, 23rd Pacific Basin Nuclear Conference, PBNC 2022, Beijing, China, 1/11/22. https://doi.org/10.1007/978-981-99-1023-6_9

Group Constants Generation Based on NECP-MCX Monte Carlo Code. / Qin, Shuai; He, Qingming; Bai, Jiahe et al.
Proceedings of the 23rd Pacific Basin Nuclear Conference, PBNC 2022. ed. / Chengmin Liu. Springer Science and Business Media Deutschland GmbH, 2023. p. 86-97 (Springer Proceedings in Physics; Vol. 283).

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

TY - GEN

T1 - Group Constants Generation Based on NECP-MCX Monte Carlo Code

AU - Qin, Shuai

AU - He, Qingming

AU - Bai, Jiahe

AU - Dong, Wenchang

AU - Cao, Liangzhi

AU - Wu, Hongchun

PY - 2023

Y1 - 2023

N2 - The reliability of few-group constants generated by lattice physics calculation is significant for the accuracy of the conventional two-step method in neutronics calculation. The deterministic method is preferred in the lattice calculation due to its efficiency. However, it is difficult for the deterministic method to treat the resonance self-shielding effect accurately and handle complex geometries. Compared to the deterministic method, the Monte Carlo method has the characteristics of using continuous-energy cross section and the powerful capability of geometric modeling. Therefore, the Monte Carlo particle transport code NECP-MCX is extended in this study to generate assembly-homogenized few-group constants. The cumulative migration method is adopted to generate the accurate diffusion coefficient and the leakage correction is performed using the homogeneous fundamental mode approximation. For the verification of the generated few-group constants, a code sequence named MCX-SPARK is built based on NECP-MCX and a core analysis code SPARK to perform the two-step calculation. The physics start-up test of the HPR1000 reactor is simulated using the MCX-SPARK sequence. The results from MCX-SPARK agree well with the results from the design report and a deterministic two-step code Bamboo-C. It is concluded that the NECP-MCX has the ability to generate accurate few-group constants.

AB - The reliability of few-group constants generated by lattice physics calculation is significant for the accuracy of the conventional two-step method in neutronics calculation. The deterministic method is preferred in the lattice calculation due to its efficiency. However, it is difficult for the deterministic method to treat the resonance self-shielding effect accurately and handle complex geometries. Compared to the deterministic method, the Monte Carlo method has the characteristics of using continuous-energy cross section and the powerful capability of geometric modeling. Therefore, the Monte Carlo particle transport code NECP-MCX is extended in this study to generate assembly-homogenized few-group constants. The cumulative migration method is adopted to generate the accurate diffusion coefficient and the leakage correction is performed using the homogeneous fundamental mode approximation. For the verification of the generated few-group constants, a code sequence named MCX-SPARK is built based on NECP-MCX and a core analysis code SPARK to perform the two-step calculation. The physics start-up test of the HPR1000 reactor is simulated using the MCX-SPARK sequence. The results from MCX-SPARK agree well with the results from the design report and a deterministic two-step code Bamboo-C. It is concluded that the NECP-MCX has the ability to generate accurate few-group constants.

KW - Few-group constant

KW - HPR1000

KW - Monte Carlo

KW - NECP-MCX

KW - Two-step

UR - https://www.scopus.com/pages/publications/85161665199

U2 - 10.1007/978-981-99-1023-6_9

DO - 10.1007/978-981-99-1023-6_9

M3 - 会议稿件

AN - SCOPUS:85161665199

SN - 9789819910229

T3 - Springer Proceedings in Physics

SP - 86

EP - 97

BT - Proceedings of the 23rd Pacific Basin Nuclear Conference, PBNC 2022

A2 - Liu, Chengmin

PB - Springer Science and Business Media Deutschland GmbH

T2 - 23rd Pacific Basin Nuclear Conference, PBNC 2022

Y2 - 1 November 2022 through 4 November 2022

ER -

Group Constants Generation Based on NECP-MCX Monte Carlo Code

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