About the Retrospective Dosimetry of Mixed Gamma-Neutron Radiation Fields

ANRI ◽  
2020 ◽  
pp. 46-52
Author(s):  
Anatoliy Portman ◽  
Aleksandr Potemkin
Keyword(s):  
Gamma Radiation ◽  
Neutron Irradiation ◽  
Thermal Activation ◽  
Neutron Radiation ◽  
Thermostimulated Luminescence ◽  
Radiation Fields ◽  
Retrospective Dosimetry ◽  
Dose Responses

The article describes research on the development of a method for doses retrospective determination of gamma-neutron irradiation with separation into components has basing on thermostimulated luminescence of quartz. Confirmation of the hypothesis about the different course of dose responses from neutron radiation and gamma radiation under different conditions of building ceramics quartz’s thermal activation is given. The possibility of separation of luminescent signals in quartz caused by gamma radiation or neutron radiation is shown.

Method neutron gamma logging for simultaneous measurement of density and porosity layer for well one device

2020 ◽  
Author(s):  
Boris G. Titov ◽  
◽  
Vladimir M. Gruznov ◽  
Keyword(s):  
Gamma Radiation ◽  
Inelastic Scattering ◽  
Simultaneous Determination ◽  
Neutron Irradiation ◽  
Simultaneous Measurement ◽  
Physical Method ◽  
Radiation Capture ◽  
Pulsed Neutron ◽  
Scattering And Radiation

A new nuclear–physical method and scheme of a device for logging gas and oil wells with the simultaneous determination of the density and porosity of the rocks behind the well are substantiated. Density and porosity are determined by one device. The pulsed neutron irradiation of the medium behind the well was used. Density and porosity are determined by gamma radiation from inelastic scattering and radiation capture of rock–forming elements by two spaced apart gamma spectrometric detectors.

Determination of activity of 51Cr on gamma radiation measurements

2017 ◽  
Vol 48 (1) ◽  
pp. 1-4
Author(s):  
V. V. Gorbachev ◽  
V. N. Gavrin ◽  
T. V. Ibragimova ◽  
A. V. Kalikhov ◽  
Yu. M. Malyshkin ◽  
...  
Keyword(s):  
Gamma Radiation ◽  
Determination Of Activity ◽  
Radiation Measurements

Neutron Radiation Effects on Lubricants and O-Rings for Target and Accelerator Applications

2021 ◽  
Vol 1024 ◽  
pp. 127-133
Author(s):  
Matteo Ferrari ◽  
Aldo Zenoni ◽  
Yong Joong Lee ◽  
Alberto Andrighetto
Keyword(s):  
Gamma Radiation ◽  
Radiation Damage ◽  
Radiation Effects ◽  
Nuclear Reactor ◽  
Neutron Radiation ◽  
Radioactive Isotopes ◽  
Structural Level ◽  
Radiation Resistant ◽  
Under Construction ◽  
Neutron Radiation Effects

Lubricants and O-rings are necessarily used for the construction of many accelerator-driven facilities as spallation sources or facilities for the production of radioactive isotopes. During operation, such component will absorb high doses of mixed neutron and gamma radiation, that can degrade their mechanical and structural properties. Experimental radiation damage tests of these components are mandatory for the construction of the facility. Methodologies for irradiation in nuclear reactor mixed fields and post-irradiation examination of lubricating oils, greases and O-rings were developed and are here presented. Samples were characterized with standard mechanical and physical-chemical tests. Parametric studies on the dose rate effects have been performed on O-rings. A case studies for a specific O-ring application in a gate valve has been developed. Some of the tested samples showed a dramatic change of their properties with dose, while others remain stable. Results were collected on nine commercial greases, on one oil and on four commercial elastomeric O-rings. The most radiation resistant among the selected products are now considered for application in facilities under construction. The main mechanisms of neutron and gamma radiation damage on these polymers were investigated at the mechanical and structural level.

Sign in / Sign up

Export Citation Format

Share Document