| 摘要 |
<p>The gutter according to the invention enables the end pieces (2) of irradiated fuel elements to be removed to a rinsing bath (4), while preventing the return flow of nitric acid vapour (6). The gutter comprises a main conduit (8) which is fitted with an air cavity barrier. The latter consists in producing downward (16) and upward (18) travels of nitrogen to drive back the rising vapour (6) and possible falls of powder (14) produced by the shearing. According to the invention, a thermal gradient is produced, to counteract that created by the rise of the nitric acid vapour (6). A lagging jacket (22) surrounds the upper part (12) of the gutter and a cooling jacket (20) is placed around the lower part of the central conduit (8). Application to the reprocessing of nuclear fuel. <IMAGE></p> |
