| 摘要 |
PURPOSE:To simplify a measuring work, and to get rid of a recording error, by marking a filter paper installation number on filter paper in a dust collecting part, when replacing the filter paper in a radiant ray monitor for collecting the dust discharged from an atomic reactor discharge port, etc., onto the filter paper in the dust collecting part. CONSTITUTION:When replacing filter paper 12 in a dust collecting part 11, a filter paper installation number is marked on the filter paper 12 by a marker 18 by being interlocked with operation of a filter paper attachable and detachable lever. In this way, it is possible to remove such a troublesome work as enters the filter paper installation number on the filter paper 12 whenever the filter paper 12 is detached, also an entry error and an entry omission are prevented, and such a danger as a worker who replaces the filter paper 12 is exposed to a radiant ray is reduced. |
