Radiation detectors employing contemporaneous detection and decontamination

Patent metadata

Field	Value
Publication number	US-10790070-B2
Application number	US-201816125954-A
Country	US
Kind code	B2
Filing date	Sep 10, 2018
Priority date	Sep 10, 2018
Publication date	Sep 29, 2020
Grant date	Sep 29, 2020

Abstract

Radiation detectors and methods of using the radiation detectors that provide a route for surface decontamination during use are described. The detectors utilize light illumination of an internal surface during use. Light is in the longer UV to near-infrared spectra and desorbs contamination from internal surfaces of radiation detectors. The methods can be carried out while the detectors are in operation, preventing the appearance of the negative effects of radioactive and non-radioactive contamination during a detection regime and following a detection regime.

First claim

What is claimed is:

1. A method for decontaminating a radiation detector comprising:
locating a radiation detector in radioactive communication with a potential radiation source;
establishing detection conditions for the detector;
monitoring the detector for a period of time to determine the presence, type or quantity of radiation in the potential radiation source; and
impinging an internal surface of the detector with a light having a wavelength from about 255 nanometers to about 2500 nm during the period of time, wherein the impinging of the internal surface decontaminates radioactive material at the internal surface.

2. The method of claim 1 , wherein the step of establishing detection conditions for the detector comprises establishing a voltage across a gas sample held in a container within the detector.

3. The method of claim 2 , the internal surface comprising a surface of the container.

4. The method of claim 1 , wherein the step of establishing detection conditions for the detector comprise bringing the potential radiation source into radioactive communication with a scintillator held in the detector.

5. The method of claim 1 , wherein the potential radiation source is monitored for the presence of tritium.

6. The method of claim 1 , wherein the radiation detector comprises a β-induced x-ray spectrometry detector.

7. The method of claim 1 , wherein the light is a single wavelength light.

8. The method of claim 1 , wherein the internal surface is periodically impinged with the light during the period of time.

9. The method of claim 1 , wherein the internal surface is continuously impinged with the light during the period of time.

10. The method of claim 1 , wherein the impinging light is enhanced at the internal surface by interaction with a decontamination enhancing material at the surface.

11. The method of claim 10 , the decontamination enhancing material comprising plasmonic nanoparticles, the plasmonic nanoparticles exhibiting a resonant interaction with the light.

12. The method of claim 11 , the plasmonic nanoparticles comprising a metal.

13. The method of claim 12 , the metal comprising aluminum, copper, gold, iron, silver, titanium, nickel, zinc, rhodium or combinations thereof.

14. The method of claim 10 , the decontamination enhancing material comprising a metal oxide photocatalyst.

15. The method of claim 10 , the decontamination enhancing material comprising a silver salt of an organic acid.

16. The method of claim 1 , wherein the light is incoherent light.

17. The method of claim 1 , wherein the radiation detector comprises a scintillator at the internal surface of the radiation detector.

18. The method of claim 1 , wherein the light is a broad-spectrum light.

19. The method of claim 1 , further comprising generating the light by use of a light emitting diode.

Assignees

• Savannah River Nuclear Solutions Llc

Inventors

• Larsen Iii George K
• Hunyadi Murph Simona E

Classifications

• B08B7/0057

  by ultraviolet radiation · CPC title

• G21F9/005 Primary

  Decontamination of the surface of objects by ablation · CPC title

• G01T1/169

  Exploration, location of contaminated surface areas · CPC title

• G21F9/002 Primary

  Decontamination of the surface of objects with chemical or electrochemical processes · CPC title

• G01T7/00

  Details of radiation-measuring instruments · CPC title