Development of measuring apparatus for noncondensable gas concentration

Takemoto, Masafumi; Nakamura, Hideo; Owada, Akihiko; Osaki, Hideki

JAEA-Research 2006-009, 48 Pages, 2006/03

JAEA-Research-2006-009.pdf:3.8MB

Nitrogen (N)gas used for the pressurization of accumulator (ACC) tanks may flow into the PWR primary system during LOCAs after the ACC coolant injection is completed. Since N gas may travel to and accumulates in reactor vessel top and U-tubes in steam generators (SGs), primary cooling and depressurization via SG secondary-side depressurization would become ineffective because of the degradation of condensation heat transfer in SG U-tubes. Quantitative measurement of gas accumulation is necessary to clarify the influences of gas onto such degradation in the heat transfer and thus the primary depressurization. However, direct measurement method of non-condensable gas concentration in steam has not been established. An apparatus to directly measure gas concentration in high-temperature steam was developed to measure gas concentration in vessel upper head and SG U-tubes during LOCA experiments using ROSA/LSFT. The developed apparatus is primarily composed of zirconia oxygen sensor and turbine meter, enabling to deal with small amount of steam-gas mixture at high temperature when air is used to pressurize ACC tanks instead of N gas. This report describes the developed apparatus and its operation method with several test results for the confirmation of oxygen gas measurement capability and applicability of the apparatus to the ROSA/LSTF experiments.

Data report for ROSA-IV LSTF gravity-driven safety injection experiment Run SB-CL-27

Yonomoto, Taisuke; *; *; Anoda, Yoshinari; Kukita, Yutaka; ; Ito, Hideo; Osaki, Hideki; ; Nishikizawa, Tomotoshi; et al.

JAERI-M 94-069, 145 Pages, 1994/03

JAERI-M-94-069.pdf:4.07MB

no abstracts in English

Data report for ROSA-IV LSTF 10% hot leg break experiment Run SB-HL-04

Kukita, Yutaka; Nakamura, Hideo; *; *; *; Anoda, Yoshinari; Kumamaru, Hiroshige; Suzuki, Mitsuhiro; ; Yonomoto, Taisuke; et al.

JAERI-M 91-040, 122 Pages, 1991/03

JAERI-M-91-040.pdf:3.42MB

no abstracts in English

Data report for ROSA-IV/LSTF 5% hot leg break experiment Run SB-HL-01

Kukita, Yutaka; *; *; Anoda, Yoshinari; Kumamaru, Hiroshige; Suzuki, Mitsuhiro; ; Yamamoto, Nobuo; Nakamura, Hideo; Yonomoto, Taisuke; et al.

JAERI-M 89-225, 117 Pages, 1990/01

JAERI-M-89-225.pdf:3.53MB

no abstracts in English

ROSA-IV/LSTF 5% cold leg break LOCA experiment Run SB-CL-18 data report

Kumamaru, Hiroshige; *; Nakamura, Hideo; Kukita, Yutaka; Koizumi, Yasuo; Anoda, Yoshinari; Suzuki, Mitsuhiro; ; Katayama, Jiro; Yamamoto, Nobuo; et al.

JAERI-M 89-027, 105 Pages, 1989/03

JAERI-M-89-027.pdf:2.8MB

no abstracts in English

Instrumentation and Data Processing Method of the ROSA-III Test

; ;

JAERI-M 8499, 137 Pages, 1979/11

JAERI-M-8499.pdf:4.12MB

no abstracts in English

ROSA-II Test Data Report,No.5; Runs 310,311,312,313,317

; *; *; ; ; ; ; ; ; ; et al.

JAERI-M 6709, 169 Pages, 1976/09

JAERI-M-6709.pdf:3.82MB

no abstracts in English

An Experimental Study on Performance of Upper Head Injection System by the ROSA-II

; ; *; *; ; *; ; ; ; ; et al.

JAERI-M 6707, 169 Pages, 1976/09

JAERI-M-6707.pdf:4.2MB

no abstracts in English

Development of an instrument to measure oxygen concentration in high pressure steam

Nakamura, Hideo; Owada, Akihiko; Osaki, Hideki

no journal, , 

no abstracts in English