A safety evaluation of HTTR core graphite structures against the great east japan earthquake

Mechanical Engineering Journal

Hiroyuki INOI¹  Kazuhiko IIGAKI¹  Shoji TAKADA¹  Masato ONO¹  Yosuke SHIMAZAKI¹  Kazuhiro SAWA¹  Daisuke TOCHIO¹  Atsushi SHIMIZU¹ 

[1] Japan Atomic Energy Agency;

关键词: httr;    htgr;    seismic;    earthquake;    analysis;    evaluation;   

DOI  :  10.1299/mej.2014tep0021

来源: DOAJ

【 摘 要 】

On March 11th, 2011, the Great East Japan Earthquake which is one of the largest earthquakes in japan occurred and the maximum acceleration in observed seismic wave in the HTTR exceeded the design value in a part of input seismic motions. Therefore, a visual inspection, a seismic analysis and a performance confirmation test of facilities were carried out in order to confirm the integrity of facility after the earthquake. The seismic analysis was carried out for the reactor core structures by using the response magnification factor method. As the results of the evaluation, the generated stress in the graphite blocks in the reactor core at the earthquake were well below the allowable values of safety criteria, and thus the structural integrity of the reactor core was confirmed. The integrity of reactor core was also supported by the visual inspections of facilities and the operation without reactor power in cold conditions of HTTR.

【 授权许可】

Unknown