In situ system for direct measurement of alpha radiation, and related method for quantifying the activity of alpha-emitting radionuclides in solution

摘要

A system for in situ nuclear measurement of alpha radiation of an effluent and a related method. The system includes: M diamond semiconductor detectors obtained by chemical vapor deposition, or silicon semiconductor detectors covered with a diamond layer, as alpha radiation detectors, configured to be immersed in the effluent, and to measure alpha radiation emitted by the effluent, M is an integer greater than or equal to 1; P measuring channels connected to the M alpha radiation detectors, P is an integer greater than or equal to 1 and less than or equal to M, each of the P measuring channels configured to provide a value or a sum of alpha activity values from the M alpha radiation detectors to which they are connected; and, if P is greater than 1, a mechanism for adding together results from the P measuring channels.

主权项

1. An in situ system for nuclear measurement of alpha radiation of an effluent, comprising:
M alpha radiation detectors, configured to be immersed in the effluent, and to measure directly alpha radiation emitted by the effluent, wherein M is an integer greater than or equal to 2, and wherein the M alpha radiation detectors are diamond semiconductor detectors obtained by chemical vapour deposition, or silicon semiconductor detectors covered with a diamond layer; and P measuring channels connected to the M alpha radiation detectors, wherein P is an integer greater than or equal to 1 and less than or equal to M, and wherein each of the P measuring channels is configured to supply an alpha activity value or a sum of such values from the M alpha radiation detectors to which they are connected, wherein the system is configured to add together the value or values supplied by the P measuring channels, wherein the M alpha radiation detectors are individually calibrated by an alpha particle transport code based on Monte Carlo method, wherein alpha radiation detectors of the M alpha radiation detectors which are connected to a given P measuring channel are calibrated in a same manner, and wherein the effluent includes Q different phases, Q being an integer greater than or equal to 2, and at least two of the M alpha radiation detectors are positioned in different phases of the effluent.