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Hatakeyama, Nozomi*; Miura, Ryuji*; Miyamoto, Naoto*; Miyamoto, Akira*; Ara, Kuniaki; Shimoyama, Kazuhito; Kato, Atsushi; Yamamoto, Tomohiko
Journal of Computer Chemistry, Japan, 21(2), p.61 - 62, 2022/00
no abstracts in English
Kuroha, Mitsuo; *; *; *; Daigo, Yoshimichi; *; *
PNC TN941 81-51, 70 Pages, 1981/02
An in-cover gas hydrogen concentration meter was designed and manufactured as the water leak detector for sodium heated steam generators. This meter consists of a thin nickel membrane, a vacuum system, and an electric heater. The nickel membrane is used under the internal pressure in order to prevent its buckling. This meter was installed in the Small Sodium-Water Reaction Test Loop (SWAT-2) at PNC-Oarai Engineering Center. The specification, the construction and some of the test results are described in this report. The following results were obtained; (1)This hydrogen meter was very compact and capable for the leak detector and the hydrogen concentration meter. (2)The test result indicated that this meter was applicable to hydrogen concentration from 3 Vppm up to 10000 Vppm at nickel membrane temperature of 500
C and cover gas pressure of 1 kg/cm
G. (3)Hydrogen permeability through the nickel membrane in sodium vapour was similar to that in sodium.
Radioisotopes, 28(2), p.116 - 123, 1979/00
no abstracts in English
Sato, Takeshi; Okawachi, Yasushi; Nakamura, Yoshihide; Sawazaki, Hiromasa
no journal, ,
In the Monju, before expanding accident in the unlikely event of a water leak from the steam generator tubes, capturing the hydrogen concentration changes in the secondary sodium, it is important to early detect the corresponding water leak. Its detection sensitivity, the amount of hydrogen diffused from the water side to the secondary sodium in through the heat exchanger tube during normal operation, depends on the performance of the cold trap to remove it. So, this time was carried out to confirm the purification efficiency derived by using the operating data of the actual machine of purification efficiency and about 20 years was expected in the design of the secondary sodium purification system cold trap.
Sato, Takeshi; Sawazaki, Hiromasa; Morioka, Tatsuya; Uchida, Takenobu; Nakamura, Yoshihide; Shiotani, Hiroki; Okawachi, Yasushi
no journal, ,
In Monju, it is important to detect and respond to hydrogen concentration changes in secondary sodium at an early stage, before any water leakage from the steam generator heat transfer tube expands. For that purpose, it is necessary to understand the hydrogen concentration during normal operation. In this report, we estimated, using the purification efficiency evaluation of the cold trap reported at the fall programs of 2016, the amount of diffused hydrogen from the characteristic test data of 1995 and evaluated the hydrogen concentration in the secondary sodium during normal operation.
Hatakeyama, Nozomi*; Miura, Ryuji*; Suzuki, Ai*; Miyamoto, Naoto*; Miyamoto, Akira*; Ara, Kuniaki; Shimoyama, Kazuhito; Kato, Atsushi; Yamamoto, Tomohiko
no journal, ,
no abstracts in English
