Investigation of uncertainty caused by random arrangement of coated fuel particles in HTTR criticality calculations
Ho, H. Q.; 本多 友貴; 後藤 実; 高田 昌二
Ho, H. Q.; Honda, Yuki; Goto, Minoru; Takada, Shoji
Coated fuel particle (CFP) is one of important factors attributing to the inherent safety feature of high temperature engineering test reactor (HTTR). However, the random arrangement of CFPs makes the simulation more complicated, becoming one of the factors affects the accuracy of the HTTR criticality calculations. In this study, an explicit random model for CFPs arrangement, namely realized random packing (RRP), was developed for the whole core of HTTR using a Monte-Carlo MCNP6 code. The effect of random placement of CFPs was investigated by making a comparison between the RRP and conventional uniform models. The results showed that the RRP model gave a lower excess reactivity than that of the uniform model, and the more number of fuel columns loading into the core, the greater the difference in excess reactivity between the RRP and uniform models. For example, the difference in excess reactivity increased from 0.07 to 0.17%$$Delta$$k/k when the number of fuel column increased from 9 to 30. Regarding the control rods position prediction, the RRP showed the results, which were closer to experiment than the uniform model. In addition, the difference in control rods position between the RRP and uniform models also increases from 12 to 17 mm as increasing number of fuel columns from 19 to 30.
使用言語 : English
掲載資料名 : Annals of Nuclear Energy
: 112
ページ数 : p.42 - 47
発行年月 : 2018/02
出版社名 : Elsevier
特許データ :
論文URL :
キーワード : HTTR; MCNP6; random arrangement; coated fuel particle; criticality calculation
使用施設 :
広報プレスリリース :
受委託・共同研究相手機関 :
登録番号 : AA20170016
抄録集掲載番号 : 45001164
論文投稿番号 : 19395
Accesses  (From Jun. 2, 2014)
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