Experimental validation of effectiveness of rod-type burnable poisons on reactivity control in HTTR

Minoru Goto, Shusaku Shiozawa, Nozomu Fujimoto, Shigeaki Nakagawa, Yasuyuki Nakao

Research output: Contribution to journalArticle

Abstract

In block-type high temperature gas-cooled reactors (HTGRs), insertion depth of control rods (CRs) into a core should be retained shallow to keep fuel temperature below 1495 °C through a burnup period, and hence excess reactivity should be reduced through a different method. Loading burnable poisons (BPs) into the core is considered as a method to resolve this problem as in case of light water reactors (LWRs). Effectiveness of BPs on reactivity control in LWRs has been validated by experimental data, however, this has not been done yet for HTGRs, because there was not enough burnup characteristics data for HTGRs required for the validation. The High Temperature Engineering Test Reactor (HTTR) is a block-type HTGRs and it adopts rod-type BPs to control reactivity. The HTTR has been operated up to middle burnup, and thereby the experimental data was expected to show effect of the BPs on the reactivity control. Hence, in order to validate effectiveness of rod-type BPs on reactivity control in the HTTR, we investigated on the HTTR results whether the BPs have functioned as designed. As a result, the CRs insertion depth has been retained shallow within allowable range, and then effectiveness of rod-type BPs on reactivity control in the HTTR was validated.

Original languageEnglish
Pages (from-to)2994-2998
Number of pages5
JournalNuclear Engineering and Design
Volume240
Issue number10
DOIs
Publication statusPublished - Oct 1 2010

Fingerprint

engineering test reactors
High temperature engineering
poisons
Poisons
High temperature gas reactors
high temperature gas cooled reactors
rods
reactivity
engineering
Control rods
Light water reactors
control rods
light water reactors
insertion
gas
reactor
test
poison

All Science Journal Classification (ASJC) codes

  • Nuclear and High Energy Physics
  • Nuclear Energy and Engineering
  • Materials Science(all)
  • Safety, Risk, Reliability and Quality
  • Waste Management and Disposal
  • Mechanical Engineering

Cite this

Experimental validation of effectiveness of rod-type burnable poisons on reactivity control in HTTR. / Goto, Minoru; Shiozawa, Shusaku; Fujimoto, Nozomu; Nakagawa, Shigeaki; Nakao, Yasuyuki.

In: Nuclear Engineering and Design, Vol. 240, No. 10, 01.10.2010, p. 2994-2998.

Research output: Contribution to journalArticle

Goto, Minoru ; Shiozawa, Shusaku ; Fujimoto, Nozomu ; Nakagawa, Shigeaki ; Nakao, Yasuyuki. / Experimental validation of effectiveness of rod-type burnable poisons on reactivity control in HTTR. In: Nuclear Engineering and Design. 2010 ; Vol. 240, No. 10. pp. 2994-2998.
@article{d017e90da42c4d2db3a5c856d5e4bf47,
title = "Experimental validation of effectiveness of rod-type burnable poisons on reactivity control in HTTR",
abstract = "In block-type high temperature gas-cooled reactors (HTGRs), insertion depth of control rods (CRs) into a core should be retained shallow to keep fuel temperature below 1495 °C through a burnup period, and hence excess reactivity should be reduced through a different method. Loading burnable poisons (BPs) into the core is considered as a method to resolve this problem as in case of light water reactors (LWRs). Effectiveness of BPs on reactivity control in LWRs has been validated by experimental data, however, this has not been done yet for HTGRs, because there was not enough burnup characteristics data for HTGRs required for the validation. The High Temperature Engineering Test Reactor (HTTR) is a block-type HTGRs and it adopts rod-type BPs to control reactivity. The HTTR has been operated up to middle burnup, and thereby the experimental data was expected to show effect of the BPs on the reactivity control. Hence, in order to validate effectiveness of rod-type BPs on reactivity control in the HTTR, we investigated on the HTTR results whether the BPs have functioned as designed. As a result, the CRs insertion depth has been retained shallow within allowable range, and then effectiveness of rod-type BPs on reactivity control in the HTTR was validated.",
author = "Minoru Goto and Shusaku Shiozawa and Nozomu Fujimoto and Shigeaki Nakagawa and Yasuyuki Nakao",
year = "2010",
month = "10",
day = "1",
doi = "10.1016/j.nucengdes.2010.05.039",
language = "English",
volume = "240",
pages = "2994--2998",
journal = "Nuclear Engineering and Design",
issn = "0029-5493",
publisher = "Elsevier BV",
number = "10",

}

TY - JOUR

T1 - Experimental validation of effectiveness of rod-type burnable poisons on reactivity control in HTTR

AU - Goto, Minoru

AU - Shiozawa, Shusaku

AU - Fujimoto, Nozomu

AU - Nakagawa, Shigeaki

AU - Nakao, Yasuyuki

PY - 2010/10/1

Y1 - 2010/10/1

N2 - In block-type high temperature gas-cooled reactors (HTGRs), insertion depth of control rods (CRs) into a core should be retained shallow to keep fuel temperature below 1495 °C through a burnup period, and hence excess reactivity should be reduced through a different method. Loading burnable poisons (BPs) into the core is considered as a method to resolve this problem as in case of light water reactors (LWRs). Effectiveness of BPs on reactivity control in LWRs has been validated by experimental data, however, this has not been done yet for HTGRs, because there was not enough burnup characteristics data for HTGRs required for the validation. The High Temperature Engineering Test Reactor (HTTR) is a block-type HTGRs and it adopts rod-type BPs to control reactivity. The HTTR has been operated up to middle burnup, and thereby the experimental data was expected to show effect of the BPs on the reactivity control. Hence, in order to validate effectiveness of rod-type BPs on reactivity control in the HTTR, we investigated on the HTTR results whether the BPs have functioned as designed. As a result, the CRs insertion depth has been retained shallow within allowable range, and then effectiveness of rod-type BPs on reactivity control in the HTTR was validated.

AB - In block-type high temperature gas-cooled reactors (HTGRs), insertion depth of control rods (CRs) into a core should be retained shallow to keep fuel temperature below 1495 °C through a burnup period, and hence excess reactivity should be reduced through a different method. Loading burnable poisons (BPs) into the core is considered as a method to resolve this problem as in case of light water reactors (LWRs). Effectiveness of BPs on reactivity control in LWRs has been validated by experimental data, however, this has not been done yet for HTGRs, because there was not enough burnup characteristics data for HTGRs required for the validation. The High Temperature Engineering Test Reactor (HTTR) is a block-type HTGRs and it adopts rod-type BPs to control reactivity. The HTTR has been operated up to middle burnup, and thereby the experimental data was expected to show effect of the BPs on the reactivity control. Hence, in order to validate effectiveness of rod-type BPs on reactivity control in the HTTR, we investigated on the HTTR results whether the BPs have functioned as designed. As a result, the CRs insertion depth has been retained shallow within allowable range, and then effectiveness of rod-type BPs on reactivity control in the HTTR was validated.

UR - http://www.scopus.com/inward/record.url?scp=77957702727&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=77957702727&partnerID=8YFLogxK

U2 - 10.1016/j.nucengdes.2010.05.039

DO - 10.1016/j.nucengdes.2010.05.039

M3 - Article

AN - SCOPUS:77957702727

VL - 240

SP - 2994

EP - 2998

JO - Nuclear Engineering and Design

JF - Nuclear Engineering and Design

SN - 0029-5493

IS - 10

ER -