Calibration device and method for nuclear power radioactive vernier gauge

Abstract

The invention discloses a calibration device and method for measuring tools with radioactive vernier in nuclear power plants. The device includes: a lifting platform, an advancing and retreating platform, a gauge block group, a set of first elastic parts, and a second elastic part; the gauge block group is placed on the lifting platform , a group of first elastic parts are located on the left and right sides of the gauge block group and jointly clamp the gauge block group; the advancing and retreating platform is located above the lifting platform, the vernier measuring tool is fixed on the advancing and retreating platform, and the first and second measuring jaws Side by side, the second elastic member is connected with the first measuring jaw and can push the first measuring jaw close to the second measuring jaw, so as to clamp the measuring block group from the left and right sides for measurement; wherein, the measuring block group includes the main measuring block and two The two matching gauge blocks are attached to the left and right measuring surfaces of the main gauge block respectively. When the gauge block group is clamped by the first measuring jaw and the second measuring jaw, the two supporting measuring blocks respectively 1. The second measuring claw is in contact, and the present invention can avoid the cross-contamination of the calibrator and the main measuring block by the radioactive residue carried by the measuring claw.

Description

technical field [0001] The invention relates to the field of nuclear power, in particular to a calibration device and method for nuclear power radioactive vernier gauges. Background technique [0002] The calibration methods of the existing vernier measuring tools are all based on the standard device and the operation of the calibration personnel in the conventional laboratory. The main standard device used for calibrating the vernier measuring device is the gauge block. The existing technology mainly relies on the calibration personnel to directly hold and operate the vernier measuring device and the The block, and the reading is carried out under the condition that the working surface of the measuring jaw of the vernier gauge is in direct contact with the measuring surface of the gauge block. The existing calibration methods and devices are mainly designed according to the verification requirements for various verniers, band meters or digital calipers, and depth calipers i...

AI Technical Summary

Problems solved by technology

[0003] Calibration of vernier measuring tools in conventional laboratories requires personnel to directly contact calipers and gauge blocks. At present, in the daily operation and maintenance of nuclear power plants, some vernier calipers need to be directly contacted on radioactive equipment, causing the calipers themselves to be radioactive. Residue and exceed the specified limit, the caliper will not be taken out of the radioactive plant, and can only be used and stored in the specified plant

In this case, the calibration personnel still trace the caliper to the source of the caliper in the radioactive factory according to the calibration method of the conventional laboratory. Radioactivity can only stay in the radioactive factory building and cannot be traced periodically, that is, it has entered a dead cycle of value traceability, that is, because the contaminated caliper is traced to the source of the value, the standard gauge block is contaminated

If this problem cannot be solved, the number of subsequent contaminated instruments will increase, and the cost of traceability will also increase significantly

[0004] Therefore, at this stage, the vernier calipers contaminated by radioactivity in the nuclear power plant cannot be traced to the source of the periodic value for the time being. The radioactive calipers can only be stored in a centralized manner. After the natural decay of the radioactive material reaches the limit, it can be brought into the conventional laboratory for value traceability.

Images