Chemical, biological, and radioactive contamination remediation with lasers

Patent metadata

Field	Value
Publication number	US-10016844-B2
Application number	US-201514599051-A
Country	US
Kind code	B2
Filing date	Jan 16, 2015
Priority date	Jan 7, 2014
Publication date	Jul 10, 2018
Grant date	Jul 10, 2018

Abstract

A laser is used to clean surfaces contaminated with chemical, biological, or radioactive substances. The laser directs a laser beam onto the surfaces and the ejecta is collected by a getter which can be a version of vacuum cleaner. A mobile system includes a laser transporting arm and collection system used in cleanup of metal and concrete surfaces contaminated with chemical, biological, or radioactive substances.

First claim

The invention claimed is:

1. An apparatus for remediation of a radiation contaminated wall that has a radiation contaminated surface, comprising:
a robot with a carriage having wheels or treads and a carriage body portion;
at least one arm extending from said robot;
a laser carried by said at least one arm, wherein said laser is a solid state pulsed laser that produces a laser beam of nano-second pulses, and wherein said laser is positioned on said at least one arm extending from said robot;
wherein said laser is a solid state pulsed laser that produces a laser beam of nano-second pulses and wherein said solid state pulsed laser produces 20 J, 15 nsec. pulses with 5 Hz repetition rate;
wherein said laser beam produced by said laser is directed to the radiation contaminated wall that has a radiation contaminated surface to ablate the radiation contaminated surface producing radiation contaminated particles, wherein said laser beam is positioned at an angle to the radiation contaminated surface and said laser beam strikes the radiation contaminated surface at said angle and ablates the radiation contaminated surface producing said radiation contaminated particles, and wherein said laser is positioned so that said laser beam directly strikes said radiation contaminated surface;
an enclosed ejecta debris collection structure including a debris collection unit attached to said least one arm, said debris collection unit positioned against the radiation contaminated wall and the radiation contaminated surface to receive said radiation contaminated particles;
a seal located between said debris collection unit and the radiation contaminated surface of said radiation contaminated wall, said seal being a fluid tight seal located between said debris collection unit and the radiation contaminated surface of said radiation contaminated wall;
a fluid circulation system connected to said enclosed ejecta debris collection structure that collects said radiation contaminated particles;
a container in said robot; and
a line connected to said fluid circulation system providing a connection between said enclosed ejecta debris collection structure and said container wherein said radiation contaminated particles are directed into said container to remediate the radiation contaminated surface.

2. An apparatus for remediation of a radiation contaminated wall that has a radiation contaminated surface, comprising:
a robot with a carriage having wheels or treads and a carriage body portion;
a receiver/antenna unit mounted on said carriage that allows remote control of said robot;
at least one arm extending from said robot;
a laser carried by said at least one arm, wherein said laser is positioned on said at least one arm extending from said robot;
a laser beam produced by said laser that is directed to the radiation contaminated surface of the radiation contaminated wall to ablate the radiation contaminated surface producing radiation contaminated particles, wherein said laser is a solid state pulsed laser that produces a laser beam of nano-second pulses, wherein said solid state pulsed laser produces 20 J, 15 nsec. pulses with 5 Hz repetition rate, wherein said laser beam is positioned at an angle to the radiation contaminated surface and said laser beam strikes the radiation contaminated surface at said angle and ablates the radiation contaminated surface producing said radiation contaminated particles, and wherein said laser is positioned so that said laser beam directly strikes said radiation contaminated surface;
an enclosed ejecta debris collection structure including a debris collection unit attached to said least one arm, said debris collection unit positioned against the radiation contaminated surface of the radiation contaminated wall to receive said radiation contaminated particles;
a seal located between said debris collection unit and the radiation contaminated surface, said seal providing a fluid tight seal between said debris collection unit and the radiation contaminated surface of the radiation contaminated wall, said seal being a fluid tight seal located between said debris collection unit and the radiation contaminated surface of said radiation contaminated wall;
a fluid circulation system connected to said enclosed ejecta debris collection structure that collects said radiation contaminated particles;
a container in said robot; and
a line connected to said fluid circulation system providing a connection between said enclosed ejecta debris collection structure and said container wherein said radiation contaminated particles are directed into said container for remediation of the radiation contaminated surface.

Assignees

• L Livermore Nat Security Llc

Inventors

• Farmer Joseph C
• Rubenchik Alexander M

Classifications

• B23K26/36

  Removing material (B23K26/55, B23K26/57 take precedence) · CPC title

• B08B15/02

  using chambers or hoods covering the area {(B08B15/002 takes precedence)} · CPC title

• G01T7/02

  Collecting means for receiving or storing samples to be investigated {and possibly directly transporting the samples to the measuring arrangement; particularly for investigating radioactive fluids (sampling, preparing specimens for investigation in general G01N1/00, G01N1/02; shielded cells or rooms structurally combined with manipulatin devices G21F; measuring of chromatographically separated samples G01N30/00 - G01N30/96)} · CPC title

• G01V5/0091

  Physics · mapped topic

• G01V5/02

  specially adapted for surface logging, e.g. from aircraft · CPC title