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JAEA Reports

Development of ultrasonic heat transfer tube thickness measurement apparatus (Contract research)

Oba, Toshihiro; Suetsugu, Hidehiko*; Yano, Masaya*; Kato, Chiaki; Yanagihara, Takao

JAERI-Tech 2002-082, 47 Pages, 2003/01

JAERI-Tech-2002-082.pdf:1.87MB

The demonstration test for evaluating reliability of the acid recovery evaporator at Rokkasho Reprocessing Plant has been carried out at JAERI. For the nondestructive measurement of the thickness of heat transfer tubes of the acid recovery evaporator in corrosion test, we have developed thickness measurement apparatus for heat transfer tubes by ultrasonic immersion method with high resolution. The ultrasonic prove in a heat transfer tube can be moved vertically and radially. The results obtained by this apparatus coincident well with those obtained by a destructive method using an optical microscope.

JAEA Reports

Development of corrosion testing equipment under heat transfer and irradiation conditions to evaluate corrosion resistance of materials used in acid recovery evaporator (Contract research)

Motooka, Takafumi; Numata, Masami; Kiuchi, Kiyoshi

JAERI-Tech 2001-088, 38 Pages, 2002/01

JAERI-Tech-2001-088.pdf:2.78MB

We have been evaluated the safety for corrosion of various metals applied to acid recovery evaporators by the mock-up tests using small scaled equipment and the reference tests in laboratories with small specimens. These tests have been conducted under un-radioactive environment. The environment in practical reprocessing plants has many radioactive species. Therefore, the effect of irradiation on corrosion should be evaluated in detail.In this study, we have developed the corrosion testing equipment, which is employed to simulate environments in the acid recovery evaporators. This report describes the specification of corrosion testing equipment and the results of primary, reference and hot tests.Using the equipment, the corrosion test under heat transfer and irradiation conditions has been carried out for 930 hours in safety. It is expectable that useful corrosion test data in radioactive environment are accumulated with this equipment in future, and help the adequate choice of corrosion test condition in laboratories.

JAEA Reports

Inspection of heat transfer tubes after mock-up tests of minituarized apparatus for the acid recovery evaporator (Contract research)

Hamada, Shozo; Fukaya, Kiyoshi*; Kato, Chiaki; Yanagihara, Takao; Doi, Masamitsu*; Kiuchi, Kiyoshi

JAERI-Tech 2001-063, 49 Pages, 2001/10

JAERI-Tech-2001-063.pdf:13.39MB

The demonstration test for the acid recovery evaporator and the dissolver used in the major equipment of Rokkasho Reprocessing Plant (RRP), has been carried out. The mock-up miniature equipment has been employed to it. This test had been performed from April in 1998. The total time of demonstration test using the mock-up equipment is about two and half years, which corresponds to about 20,000 hours. After that, four of the seven heat transfer tubes used in the evaporator were drawn out and the corrosion level and the mechanical properties were evaluated for one of them. As a result, intergranular corrosion was recognized in the inner surface of the heat transfer tube and the corrosion depth at the grain boundary was statistically shown to be about one grain from the inner surface. Further, no change in mechanical properties was observed and growth of intergranular cracks in the inner surface of the specimen was found after flattering test.

Journal Articles

A Safeguards approach for a plutonium evaporator of a large-scale reprocessing plant

*; Ikawa, Koji

Transactions of the American Nuclear Society, 72(SUPPL.1), p.6 - 7, 1995/00

no abstracts in English

Journal Articles

Study of safeguards approach for the area of plutonium evaporator in a large scale reprocessing plant

*; Ikawa, Koji

Dai-15-Kai Kaku Busshitsu Kanri Gakkai Nihon Shibu Nenji Taikai Rombunshu, 0, p.138 - 144, 1994/10

no abstracts in English

Journal Articles

Fault tree analysis of system anomaly leading to red oil explosion in plutonium evaporator

Nomura, Yasushi; R.Leicht*; P.Ashton*

Journal of Nuclear Science and Technology, 31(8), p.850 - 860, 1994/08

 Times Cited Count:4 Percentile:53.92(Nuclear Science & Technology)

no abstracts in English

JAEA Reports

Construction and Operation of the Vapor Compression Evaporator Treatment Facility

; *; ; ; ;

JAERI-M 9910, 37 Pages, 1982/01

JAERI-M-9910.pdf:1.57MB

no abstracts in English

Journal Articles

Leaching of radionuclides from a cement composite incorporating evaporator concentrate generated at a pressurized water reactor nuclear power plant

;

Nuclear Science and Engineering, 80(1), p.14 - 25, 1982/00

 Times Cited Count:7 Percentile:62.19(Nuclear Science & Technology)

no abstracts in English

Journal Articles

Improvement of bitumen-waste product in leachability; -Leachability of bitumen product containing BWR's evaporator concentrates

; ;

Annals of Nuclear Energy, 8(8), p.363 - 369, 1981/00

 Times Cited Count:0 Percentile:0.02(Nuclear Science & Technology)

no abstracts in English

Journal Articles

Radiochemical analysis of strontium-90 and gross alpha activity in radioactive eiquid waste

Kyoto Daigaku Genshiro Jikkenjo Hoshasei Haikibutsu Kanri Semmon Kenkyukai Hokokusho, p.20 - 25, 1981/00

no abstracts in English

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