Development of high temperature isolation valve for the HTTR hydrogen production system

Nishihara, Tetsuo; Sakaki, Akihiro*; Inagaki, Yoshiyuki; Takami, Kazuo*

Nihon Genshiryoku Gakkai Wabun Rombunshi, 3(4), p.381 - 387, 2004/12

https://doi.org/10.3327/taesj2002.3.381

JAERI has been carried out research and development on the HTTR hydrogen production system. One of the key components in this system is a high temperature isolation valve (HTIV) installed on the hot helium gas piping penetrating the reactor containment vessel. Angle valve with inner thermal insulator was selected for HTIV and conceptual design was performed. The structural integrity of HTIV was clarified by the stress analyses. Allowable helium leak rate of HTIV was discussed. Helium leak tests using small-scaled valve seat models were performed to decide the seat surface shape and valve closing force. The test results show that the leak rate of wedge shape seat increased in proportion to the number of simulated temperature and stress cycles loaded on the seat models before helium leak test, however that of flat seat did not depend on the number of cycles. So flat seat is adopted for HTIV. It was found that the seat closing force of 30 MPa is reasonable to meet the allowable helium leak rate.

Study on commercial HTGR hydrogen production system

Nishihara, Tetsuo; Hada, Kazuhiko; Nishimura, Kuniyuki*

JAERI-Tech 2000-046, 54 Pages, 2000/07

JAERI-Tech-2000-046.pdf:2.72MB

no abstracts in English

Corrosion test of reformer tube material in the HTTR hydrogen production system, 1; Total test plan and construction of test apparatus (Contract research)

Nishihara, Tetsuo;

JAERI-Tech 99-080, p.30 - 0, 1999/11

JAERI-Tech-99-080.pdf:2.19MB

no abstracts in English

Out-of-pile demonstration test of HTTR hydrogen production system; Structure and fabrication technology of steam reformer (Contract research)

Inagaki, Yoshiyuki; Ouchi, Yoshihiro; Fujisaki, Katsuo; Kato, Michio; ; Hayashi, Koji;

JAERI-Tech 99-074, p.63 - 0, 1999/10

JAERI-Tech-99-074.pdf:3.0MB

no abstracts in English

Study on tritium・hydrogen permeation in the HTTR hydrogen production system, 1; Hydrogen permeability of Hastelloy XR (Contract research)

Takeda, Tetsuaki; Iwatsuki, Jin*; Inagaki, Yoshiyuki; Ogawa, Masuro

JAERI-Tech 98-044, 34 Pages, 1998/11

JAERI-Tech-98-044.pdf:2.0MB

no abstracts in English

Nuclear heat utilization by HTGR

Miyamoto, Yoshiaki

Dai-36-Kai Genshiryoku Sogo Shimpojiumu Yokoshu, p.37 - 41, 1998/01

no abstracts in English

Secondary heat transport piping system design for the high temperature gas-cooled reactor (GTHTR300C)

Nomoto, Yasunobu; Horii, Shoichi; Sumita, Junya; Sato, Hiroyuki; Yan, X.

no journal, , 

no abstracts in English