METHOD FOR INSPECTING LEAKAGE OF VESSEL FOR TRANSPORTING SPENT NUCLEAR FUEL

摘要

PURPOSE:To shorten the inspecting time by supplying and compressing gaseous helium to and in the inner part of a vessel main body side in the place of leakage inspection, next sucking the outer part in the place of leakage inspection by a vacuum pump and then detecting the quantity of helium to be leaked. CONSTITUTION:The gaseous helium is supplied and compressed to and in the inner part of the vessel main body 1 side in the place of leak inspection, next the outer part in the place of leak inspection is sucked by the vacuum pump 8, and then the helium quantity leaked to the outer part is detected. By such a method, since the inspection is not influenced by temp. as compared with the case that only the air in the inner part of the main body 1 side is compressed as usual, the inspecting precision is improved, the inspecting precision is not influenced so much even if the attained vacuum degree of the outer part is somewhat insufficient, thus shortening the inspecting time.