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Title: Distributed fiber optic moisture intrusion sensing system

Abstract

Method and system for monitoring and identifying moisture intrusion in soil such as is contained in landfills housing radioactive and/or hazardous waste. The invention utilizes the principle that moist or wet soil has a higher thermal conductance than dry soil. The invention employs optical time delay reflectometry in connection with a distributed temperature sensing system together with heating means in order to identify discrete areas within a volume of soil wherein temperature is lower. According to the invention an optical element and, optionally, a heating element may be included in a cable or other similar structure and arranged in a serpentine fashion within a volume of soil to achieve efficient temperature detection across a large area or three dimensional volume of soil. Remediation, moisture countermeasures, or other responsive action may then be coordinated based on the assumption that cooler regions within a soil volume may signal moisture intrusion where those regions are located.

Inventors:
 [1]
  1. (Albuquerque, NM)
Publication Date:
Research Org.:
Sandia National Laboratories (SNL-NM), Albuquerque, NM
Sponsoring Org.:
USDOE
OSTI Identifier:
958132
Patent Number(s):
6,581,445
Application Number:
09/608,334
Assignee:
Sandia Corporation (Albuquerque, NM) ALO
DOE Contract Number:  
AC04-96AL85000
Resource Type:
Patent
Country of Publication:
United States
Language:
English

Citation Formats

Weiss, Jonathan D. Distributed fiber optic moisture intrusion sensing system. United States: N. p., 2003. Web.
Weiss, Jonathan D. Distributed fiber optic moisture intrusion sensing system. United States.
Weiss, Jonathan D. Tue . "Distributed fiber optic moisture intrusion sensing system". United States. https://www.osti.gov/servlets/purl/958132.
@article{osti_958132,
title = {Distributed fiber optic moisture intrusion sensing system},
author = {Weiss, Jonathan D.},
abstractNote = {Method and system for monitoring and identifying moisture intrusion in soil such as is contained in landfills housing radioactive and/or hazardous waste. The invention utilizes the principle that moist or wet soil has a higher thermal conductance than dry soil. The invention employs optical time delay reflectometry in connection with a distributed temperature sensing system together with heating means in order to identify discrete areas within a volume of soil wherein temperature is lower. According to the invention an optical element and, optionally, a heating element may be included in a cable or other similar structure and arranged in a serpentine fashion within a volume of soil to achieve efficient temperature detection across a large area or three dimensional volume of soil. Remediation, moisture countermeasures, or other responsive action may then be coordinated based on the assumption that cooler regions within a soil volume may signal moisture intrusion where those regions are located.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {Tue Jun 24 00:00:00 EDT 2003},
month = {Tue Jun 24 00:00:00 EDT 2003}
}

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