Activated foil clamping structure and activated foil taking-out device for neutron activation analysis

Abstract

The invention discloses an activated foil clamping structure and activated foil taking-out device for neutron activation analysis. The device comprises a piece of an activated foil clamping structurecomposed of high-purity aluminum (purity of larger than 99.999%) and five pieces of aluminum-nickel or aluminum-cobalt alloy activated foil embedded on the high-purity aluminum, and a device for taking out the aluminum-nickel or aluminum-cobalt alloy activated foil. According to the activated foil clamping structure of the invention, five groups of activated foils are fixed in an inlaying manner,so that the risk of accidental falling of the activated foils can be effectively reduced, the function of obtaining a plurality of data points by single measurement can be realized, the laying efficiency is improved, and the activated foil clamping structure is suitable for reactors running at low power and high power; according to the activated foil taking-out device of the invention, the position of the activated foil can be positioned, the activated foil is taken out in a long-distance mechanical pressure applying mode, and the activated foil taking-out device is provided with the lead glass transparent cover, so that the gamma-ray radiation dosage borne by experiment operators can be effectively reduced; and the activated foil clamping structure and activated foil taking-out device forneutron activation analysis are suitable for measurement of neutron flux at a designated position in a reactor.

Description

technical field [0001] The invention belongs to the application field of nuclear technology, and in particular relates to an activation foil clamping structure and an activation foil take-out device for neutron activation analysis. Background technique [0002] With the domestic High Flux Engineering Test Reactor (High Flux Engineering Test Reactor, HFETR), China Advanced Research Reactor (CARR) and China Mianyang Research Reactor (China Mianyang Research Reactor, CMRR) successively put into operation, the reactors As a key physical parameter, the neutron flux at a specific location has attracted more and more attention from researchers. This parameter is mainly obtained experimentally by the neutron activation analysis method. [0003] At present, the metal activation material used for activation analysis is placed in the designated position in the reactor mainly by using special adhesive bonding, using a small sample box to hold it separately, and opening holes on the sam...

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Problems solved by technology

Due to the fact that the glue will lose its viscosity under the neutron irradiation of higher flux and cause the metal activation material to fall off, so the applicable conditions are limited

However, because the volume and mass of the materials used for neutron activation analysis are

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