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Okada, Toshio; *; *; *; *; Miyake, Osamu; Sasaki, Shuichi
PNC TN1410 94-006, 57 Pages, 1994/11
no abstracts in English
*; Morimoto, Makoto*; *; *; *; Kuroha, Mitsuo; *
PNC TN941 77-104, 101 Pages, 1977/06
After finishing first phase test, the 1MW Steam Generator was modified and second phase test was started from February 1973 and finished the test by June 1975. Then the steam Generator was dismantled, cleaned, and structural materials of the steam generator were externally inspected. This is to report the progress of operation of second phase test, repairing of facility and to describe the details of dismantling and cleaning of the steam generator addng the explanations of external inspection with photographs. Items clarified by the second phase test, followed by dismantling and cleaning were as follows : (1)Modifications based on the first phase test results were effective to improve the performance of the steam generator. (2)It was demonstrated that the cleaning of steam generator by flushing mixture of steam and argon gases was safe and effective. (3)During the external inspection after dismantling, they were observed slight deformations, and in way of the tube supports, wearing of tubes, which was supposed to be caused by fretting, was also observed.
Furukawa, Kazuo; ; ; ; ; *; *
JAERI-M 6073, 116 Pages, 1975/03
no abstracts in English
*; *; *; *; *; *; *
PNC TN941 74-24, 71 Pages, 1974/05
After 3,600 hours operation, 1 MW Steam Generator was Stopped and conveyed in parts and sodium in SG was cleaned successfully. This was the first experience in Japan and a lot of useful informations were obtained as follows about the dismontle of large scale sodium component. (1)By circulation of high temperature sodium (400, 450
C) before drainage, the sodium was drained from SG almost perfectly. (2)In sodium pipeing near SG, there remained a little sodium. (3)Tube bunddle was pull out smoothly from SG without any troubles. (4)There was a lot of condensed sodium in cover-gas region. (5)The top of sodium level ditector and sodium distributor, and the bottom of downcomers dummy tube were bended and distorted. (6)There was a lot of black powder on the sureface of tube, liner and inner shroud.
; ; ; *;
Anzen Kogaku, 10(1), p.28 - 34, 1971/00
no abstracts in English
*; *; *; *; *; *; *
PNC TJ250 69-16, 48 Pages, 1968/12
PNC-TJ250-69-16.pdf:3.13MBPNC-TJ250-69-16T.pdf:2.3MB
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