Scholarlink

<p>The full-length getter (FLG) is a critical component of the tritium producing burnable absorber rod (TPBAR), designed to capture tritium produced within the lithium aluminate pellets. However, the FLG readily absorbs both protium (<sup>1</sup>H) and tritium (<sup>3</sup>H) because of chemical similarities. The absorption of protium potentially reduces the FLG’s capacity to absorb tritium increasing the risk of tritium permeation into the reactor coolant. FLGs contain a nickel coating. During irradiation, neutron capture by <sup>58</sup>Ni results in the formation of <sup>59</sup>Ni, which undergoes neutron bombardment to produce <sup>4</sup>He via <sup>59</sup>Ni(n,α) reactions and protium via <sup>59</sup>Ni(n,p) reactions. The measured <sup>4</sup>He content post-irradiation provides insight into the neutron capture processes within the getter, which may further be useful in determining&#xa0;the quantity of hydrogen produced by the nickel plating on FLG because <sup>59</sup>Ni also produces protium in a <sup>59</sup>Ni(n,p) reaction. This study evaluates protium produced from neutron irradiation of nickel plating on the FLG through <sup>59</sup>Ni(n,p) reactions, quantifies its contribution to the total protium observed, and informs models of tritium and hydrogen transport within TPBARs. The contribution of <sup>1</sup>H from the nickel in FLG accounted for less than 1% of the measured molecular hydrogen (H<sub>2</sub>) gas in&#xa0;post irradiation examination (PIE), ranging from 0.005% to 0.614%. These findings refine current knowledge of the protium-tritium interplay in TPBARs and support the development of improved transport models for tritium and hydrogen, ultimately aiding in the optimization of TPBAR design and reactor operations.</p>

错误：搜索内容不能为空，请输入英文关键词
错误：关键词超出字数限制，请精简
高级检索

Estimating the contribution of the nickel to protium loading of full-length getters

  • 期刊论文

  • 发表日期：

    2026年5月12日

查看全文
  • Dana L. Arbova,
  • Jamie K. Lucarelli,
  • Sara E. Speetjens,
  • Connor D. Hilton,
  • Travis J. Zipperer,
  • David V. Colameco,
  • Steve D. Shen,
  • Christopher J. Defelice,
  • Alexander A. Iveson,
  • Elise R. Conte,
  • Richard M Cox

摘要

The full-length getter (FLG) is a critical component of the tritium producing burnable absorber rod (TPBAR), designed to capture tritium produced within the lithium aluminate pellets. However, the FLG readily absorbs both protium (1H) and tritium (3H) because of chemical similarities. The absorption of protium potentially reduces the FLG’s capacity to absorb tritium increasing the risk of tritium permeation into the reactor coolant. FLGs contain a nickel coating. During irradiation, neutron capture by 58Ni results in the formation of 59Ni, which undergoes neutron bombardment to produce 4He via 59Ni(n,α) reactions and protium via 59Ni(n,p) reactions. The measured 4He content post-irradiation provides insight into the neutron capture processes within the getter, which may further be useful in determining the quantity of hydrogen produced by the nickel plating on FLG because 59Ni also produces protium in a 59Ni(n,p) reaction. This study evaluates protium produced from neutron irradiation of nickel plating on the FLG through 59Ni(n,p) reactions, quantifies its contribution to the total protium observed, and informs models of tritium and hydrogen transport within TPBARs. The contribution of 1H from the nickel in FLG accounted for less than 1% of the measured molecular hydrogen (H2) gas in post irradiation examination (PIE), ranging from 0.005% to 0.614%. These findings refine current knowledge of the protium-tritium interplay in TPBARs and support the development of improved transport models for tritium and hydrogen, ultimately aiding in the optimization of TPBAR design and reactor operations.