Refine your search:     
Report No.
 - 
Search Results: Records 1-13 displayed on this page of 13
  • 1

Presentation/Publication Type

Initialising ...

Refine

Journal/Book Title

Initialising ...

Meeting title

Initialising ...

First Author

Initialising ...

Keyword

Initialising ...

Language

Initialising ...

Publication Year

Initialising ...

Held year of conference

Initialising ...

Save select records

JAEA Reports

Verification of alternative dew point hygrometer for CV-LRT in MONJU; Short- and long-term verification for capacitance-type dew point hygrometer (Translated document)

Ichikawa, Shoichi; Chiba, Yusuke; Ono, Fumiyasu; Hatori, Masakazu; Kobayashi, Takanori; Uekura, Ryoichi; Hashiri, Nobuo*; Inuzuka, Taisuke*; Kitano, Hiroshi*; Abe, Hisashi*

JAEA-Research 2017-001, 40 Pages, 2017/03

JAEA-Research-2017-001.pdf:5.19MB

In order to reduce the influence on a plant schedule of the MONJU by the maintenance of dew point hygrometers, The JAEA examined a capacitance type dew point hygrometer as an alternative dew point hygrometer for a lithium-chloride type dew point hygrometer which had been used at the CV-LRT in the MONJU. As a result of comparing a capacitance type dew point hygrometer with a lithium-chloride type dew point hygrometer at the CV-LRT (Atmosphere: nitrogen, Testing time: 24 hours), there weren't significant difference between a capacitance type dew point hygrometer and a lithium-chloride type dew point hygrometer. As a result of comparing a capacitance dew point hygrometer with a high-mirror-surface type dew point hygrometer for long term verification (Atmosphere: air, Testing time: 24 months), the JAEA confirmed that a capacitance type dew point hygrometer satisfied the instrument specification ($$pm$$2.04$$^{circ}$$C) required by the JEAC4203-2008.

JAEA Reports

Verification of alternative dew point hygrometer for CV-LRT in Monju

Ichikawa, Shoichi; Chiba, Yusuke; Ono, Fumiyasu; Hatori, Masakazu; Kobayashi, Takanori; Uekura, Ryoichi; Hashiri, Nobuo*; Inuzuka, Taisuke*; Kitano, Hiroshi*; Abe, Hisashi*

JAEA-Research 2016-021, 32 Pages, 2017/02

JAEA-Research-2016-021.pdf:5.0MB

In order to reduce the influence on a plant schedule of the MONJU by the maintenance of dew point hygrometers, The JAEA examined a capacitance type dew point hygrometer as an alternative dew point hygrometer for a lithium-chloride type dew point hygrometer which had been used at the CV-LRT in the MONJU. As a result of comparing a capacitance type dew point hygrometer with a lithium-chloride type dew point hygrometer at the CV-LRT (Atmosphere: nitrogen, Testing time: 24 hours), there weren't significant difference between a capacitance type dew point hygrometer and a lithium-chloride type dew point hygrometer. As a result of comparing a capacitance dew point hygrometer with a high-mirror-surface type dew point hygrometer for long term verification (Atmosphere: air, Testing time: 24 months), the JAEA confirmed that a capacitance type dew point hygrometer satisfied the instrument specification ($$pm$$2.04$$^{circ}$$C) required by the JEAC4203-2008.

JAEA Reports

None

Iijima, Minoru; ; Uekura, Ryoichi;

JNC TN2440 2002-017, 27 Pages, 2001/01

JNC-TN2440-2002-017.pdf:1.4MB

JAEA Reports

None

Iijima, Minoru; ; Uekura, Ryoichi;

JNC TN2440 2002-016, 27 Pages, 2000/01

JNC-TN2440-2002-016.pdf:1.43MB

JAEA Reports

None

Iijima, Minoru; ; Uekura, Ryoichi;

JNC TN2440 2002-015, 33 Pages, 1999/01

JNC-TN2440-2002-015.pdf:1.47MB

JAEA Reports

None

Iijima, Minoru; ; Uekura, Ryoichi;

JNC TN2440 2002-014, 36 Pages, 1998/01

JNC-TN2440-2002-014.pdf:1.5MB

JAEA Reports

None

Iijima, Minoru; ; Uekura, Ryoichi;

JNC TN2440 2002-013, 33 Pages, 1997/01

JNC-TN2440-2002-013.pdf:1.43MB

JAEA Reports

None

Iijima, Minoru; ; Uekura, Ryoichi;

JNC TN2440 2002-012, 31 Pages, 1996/01

JNC-TN2440-2002-012.pdf:1.76MB

Oral presentation

Verification test of alternative dew point detector for CV-LRT in Monju

Chiba, Yusuke; Ichikawa, Shoichi; Ono, Shimpei; Hatori, Masakazu; Kobayashi, Takanori; Uekura, Ryoichi; Hashiri, Nobuo*; Inuzuka, Taisuke*; Abe, Hisashi*; Kitano, Hiroshi*

no journal, , 

The lithium chloride-type dew point detector was used for reactor containment vessel the entire leak rate test (CV-LRT) in fast-breeder reactor Monju (Monju) which needs the maintenance every three months. But when the plant process is considered, it's desirable for the maintenance periods beyond 12 months. Thereupon the capacitance-type dew point detector made in VAISALA Corporation was nominated as the alternative lithium chloride-type dew point detector in Monju. The lithium chloride-type dew point detector, when it's adopted, for, to have to be satisfied a request of the regulations, it's necessary to estimate the performance of the lithium chloride-type dew point detector. In the condition of the CV-LRT, the dew point data were measured by the capacitance-type dew point detector and the lithium chloride-type dew point detector for 24 hours. These data were compared and the performance of the capacitance-type dew point detector was estimated. Furthermore, the dew point data of Monju under the atmosphere ware continuously measured by the capacitance-type dew point detector and the mirror surface-type dew point detector for 2 years. These data were compared and the performance of the capacitance-type dew point detector was estimated. As a result, the capacitance-type dew point detector was confirmed that had the instrument precision that JEAC4203-2008 required.

Oral presentation

Verification of alternative dew point hygrometer for CV-LRT in MONJU; Short and long-term verification for capacitance type dew point hygrometer

Hatori, Masakazu; Ichikawa, Shoichi; Chiba, Yusuke; Kobayashi, Takanori; Uekura, Ryoichi; Hashiri, Nobuo*; Inuzuka, Taisuke*; Kitano, Hiroshi*; Abe, Hisashi*; Ono, Fumiyasu

no journal, , 

In order to reduce the influence on a plant schedule of Monju by the maintenance of dew point hygrometers, JAEA Agency examined a capacitance type dew point hygrometer as an alternative dew point hygrometer for a lithium-chloride type dew point hygrometer which had been used at the containment vessel leak rate test in Monju. As a result of comparing a capacitance type dew point hygrometer with a lithium-chloride type dew point hygrometer at the CV-LRT (Atmosphere: nitrogen, testing time/24 hours), there was no significant difference between a capacitance type dew point hygrometer and a lithium-chloride type dew point hygrometer. As a result of comparing a capacitance dew point hygrometer with a high-precision-mirror-surface type dew point hygrometer for long term verification (Atmosphere: air, testing time: 24 months), it was confirmed that a capacitance type dew point hygrometer satisfied the instrument specification required by the CV-LRT. There are no other cases where atmosphere measurement has been carried out for a long time by existing measuring instruments.

Oral presentation

Material test and bursting test of used rupture disk in Monju

Ichikawa, Shoichi; Ito, Kenji; Wakimoto, Fumitsugu; Tone, Kohei; Watanabe, Yusuke; Kobayashi, Takanori; Uekura, Ryoichi

no journal, , 

To establish an exchange frequency of a rupture disk (hereinafter called "RD") installed in a evaporator and a superheater (hereinafter called "ED", "SH") of the prototype fast-breeder reactor MONJU (hereinafter called "MONJU"), the purpose of this study is to estimate the aging degradation of used RD in MONJU and material test and bursting test of used RD were carried out. When massive Na-H20 reaction occurred in the ED, SH, RD is the equipment which was installed for the purpose of the case that the pressure in the secondary heat transportation system is opened and opening of the pressure is detected. From the result of the examination, material characteristics were not a significant degradation. On the other hand, the bursting pressure was slightly changed. However the change was in the reach of the request value of the secondary heat transportation system. To establish the exchange frequency of the high precision for the RD, expansion of further data is needed.

Oral presentation

On the operation of ventilation air-conditioning equipment for MONJU during decommissioning phase

Ookubo, Manabu; Shimizu, Ryo; Hatori, Masakazu; Kobayashi, Takanori; Uekura, Ryoichi

no journal, , 

Under the circumstances where the fuel is disposed in the reactor core and the furnace fuel storage tank during the decommissioning measures of "Monju" where the decay heat is at an extremely low level, while preventing the sodium from being frozen by the preheater heater, It is desirable to continue operation of cooling the dissipated heat released into the compartment by ventilating air conditioning equipment. However, the operation of ventilation air conditioning equipment is designed for normal operation of nuclear reactors, and it is necessary to review the proper operation according to the situation at the stage of decommissioning. In this report, we will summarize the relationship between the actual load and the capacity of the ventilating and air conditioning equipment based on the past operation data and report on the status of consideration on rational ventilation air conditioning equipment operation at the decommissioning stage.

Oral presentation

The Results obtained from the 20 years of "Monju" plant data, 11; The Shaft sealing mechanism of primary sodium pump

Hashidate, Ryuta; Morioka, Tatsuya; Sawazaki, Hiromasa; Shiotani, Hiroki; Obata, Ikuhito; Uekura, Ryoichi

no journal, , 

We have been evaluating mainly the data acquired by the central computer so far, but we focused on evaluation using preservation data from this time. In this report, we report on the results of examination of the shaft sealing mechanism which constitutes the boundary of the cover gas including sodium vapor from the viewpoint of seal gas effect considered in the design stage for sodium vapor and sealability of the cover gas boundary by using the Monju plant data and conservation data for 20 years.

13 (Records 1-13 displayed on this page)
  • 1