Initialising ...
Initialising ...
Initialising ...
Initialising ...
Initialising ...
Initialising ...
Initialising ...
Nakagawa, Rinshi; Ojima, Hisao; Hayashi, Shotaro
PNC TN8410 87-077, 19 Pages, 1987/05
no abstracts in English
Ojima, Hisao; *; Nakagawa, Rinshi
PNC TN8410 86-031, 143 Pages, 1986/06
The Laser Beam Disassembling Machine (L,B.D.M.) has been developed for getting rid of the wrapper tube before shearing in FBR spent fuel reprocessing. From 1984 to 1985, the following tests have been carried out with dummy assemblies to confirm the ability and performance of proto-type L.B.D.M. in 2nd EDF. The obtained results are presented here. (1)Disassembling test. It has been confirmed that L.B.D.M. had some superiorities on the cutting ability and the time required for disassembling. And some modification points about the machine and the disassembling Proceedure have been found out. (2)Confirmation test on optimum cutting condition the test has been carried out to optimise the cutting condition. Under the several parameters such as energy, cutting speed, kinds of assist gas, and so on. Based on the obtained data, the preliminary cutting condition could be set up. (3)Remote maintenance test on optical device. Because of using laser beam for cutting, the optical device is recognized to be peculiar part for remote maintenance. It has been evaluated that the remote maintenability of the device had no severe problems except a few minor points to be modified.
Nakagawa, Rinshi; Ojima, Hisao; Hayashi, Shotaro
PNC TN8410 86-015, 158 Pages, 1986/06
The present report describes the result of fuel bundle shearing test using shearing test apparatus (II) in the 2nd EDF to establish the adequate shearing system for FBR fuel recycling pilot plant. Main test items were as follows; (1)Obtain the method to get the fuel segments with constant length. (2)Get the characterization about the bundle-shear of FBR fuel by shearing machine. (3)Confirm the fuel segments loading system from the shearing machine to the dissolver via distributor and chute. The tests have been carried out with dummy fuel assemblies of Monju core, which were consisted of Al
O
sintered pellets and stainless steel cladding tube. As the results, the following informations have been abtained. (1)The fuel segments with constant length could be obtained by only using a blade with special structure. Some modifications of the apparatus were not necessary. (2)It was obserbed that the open area portion of segment from plenum part shearing was nearly 0%, so that the method of sodium disactivation should be improved. And the final shearing part (about 20cm of plenum part) could not be recovered from the shearing apparatus and not be loaded to the dissolver. (3)Choped wrapping wire became an obstacle for lifting up the hull basket, because some pieces entered in the clearance between basket and barrel.
*; Nakagawa, Rinshi; *; *; *; *; Saito, Makoto; Ojima, Hisao
PNC TN841 85-05, 116 Pages, 1985/02
no abstracts in English
Nakagawa, Rinshi; *; *; Ojima, Hisao; *; *
PNC TN841 84-57, 48 Pages, 1985/01
no abstracts in English
