the advanced monitoring system initiative: optimizing ... · amsi 3 amsi operating characteristics...
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AMSI
The Advanced Monitoring System Initiative: Optimizing Delivery and Application of New
Sensor and Monitoring Solutions
John B. Jones, Janis N. RomoU. S. Department of Energy, Nevada Site Office, Las Vegas, NV
Richard J. Venedam, Charles F. Lohrstorfer, Edward H. Hohman
Bechtel Nevada, Las Vegas, NV
Stephan J. WeeksBechtel Nevada, Santa Barbara, CA
William J. HaasAmes Laboratory, Iowa State University, Ames, IA
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2AMSI
Advanced Monitoring Systems Initiative (AMSI)
• Operated by:– Nevada Site Office of the U.S. DOE and – Bechtel Nevada
• Funds provided by:– DOE EM Office of Science and Technology
• Mission:– Accelerate the development and
application of advanced monitoring systems
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3AMSI
AMSI Operating Characteristics
• Focuses its resources on high-impact solutions to end-user needs and is driven by end-user application requirements.
• Looks for strong end-user support, including– co-funding of the proposed work and– commitment to include in end-user baseline.
• Emphasizes partnership to accomplish its work. • Emphasizes late stage engineering, test and
evaluation in end-user application conditions• Does not fund research projects.
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4AMSI
AMSI Emphases
• Emphasizes the importance of remote and automated, unattended operation
• Emphasizes internet communication in sensor and monitoring system operation, for– Data recording, display, and summarization– Information sharing– Instrument control
• Employs the spiral development model, i. e., build-a-little, test a little, repeat.
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5AMSI
AMSI Resources
Nevada Test Site
HazMat Spill Center
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6AMSI
AMSI Resources
• Nevada Test Site (NTS)– Hazardous Materials (HazMat) Spill Center
• a one-of-a-kind facility permitted for releases of hazardous materials for training and testing under controlled conditions
– National Center for Combating Terrorism(NCCT)
• newly created center for training first responders to terrorist acts
• no other place in the U.S. where all combating terrorism activities can be addressed in an integrated manner
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7AMSI
Other AMSI Resources
• Industry• Universities• National Laboratories• Bechtel Nevada• Special Technologies Laboratory• Remote Sensing Laboratory• Desert Research Institute• Nevada Universities
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8AMSI
AMSI Monitors for Rads & Metals
• Tritium– in the vadose zone – in groundwater
• Technetium-99 in groundwater• Strontium-90 in groundwater• Wireless sensor platform
– Landfill performance • Universal sensor platform
– Cr(VI) in groundwater
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9AMSI
Monitoring Tritium in Vadose Zone
• Purpose– Monitor for escape/migration of tritium from nuclear
waste containments• Benefit
– Early detection can stimulate early action to stop the escape/migration; avoid higher remediation and potential health costs
• Customer– NTS, SRS, Hanford, BNL are potential customers
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10AMSI
Monitoring Tritium in Vadose Zone
• Developer– Science and Engineering Associates, Inc.,
Santa Fe, NM• Technology Characteristics
– Uses gas proportional counting – LOD < 100,000 pCi/liter water– Future: Condense water vapor & use
Proton Exchange Membrane to separate H and T from Oxygen prior to counting
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11AMSI
Monitoring Tritium in Vadose Zone
At NTS Greater Confinement Disposal site
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12AMSI
Monitoring Tritium in Groundwater
• Purpose– Monitor for migration of tritium and contamination
of groundwater – #1 need identified in the metals & rads sessions of
the Long-Term Monitoring Sensor and Analytical Methods Workshop, Orlando, FL, June 2001
• Benefit– Estimated savings of $65K/well/y in avoidance of
mobilization of personnel and equipment for sampling and analysis to fulfill regulatory requirements (FFCAs & COs)
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13AMSI
Monitoring Tritium in Groundwater
• Customer– NTS Groundwater Monitoring Program. – Other potential customers include LBNL and SRS.
• Developer– Science and Engineering Associates, Inc.,
Santa Fe, NM– Univ. of Nevada, Reno
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14AMSI
Monitoring Tritium in Groundwater
• Technology Characteristics– Needs daily measurement at 800 to 5000 bgs and at
tritium levels of 1000 (300) to 200,000 pCi/L– UNR reacts water with NaK to produce H & T gas;
uses a proportional counter to measure beta decay of the tritium; finally captures H & T on getter. Requires replenishment every 50-100 days
– SEA will condense water and HTO from the sparge sampling stream (P10) and use a Proton Exchange Membrane module to separate H and T from oxygen prior to counting. Target LOD < 20,000 pCi/l = DWS
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15AMSI
Monitoring Tc-99 in Groundwater
• Purpose– in situ monitoring of Tc-99 to monitor plume
migration and performance of remediation activities.
• Benefit– faster, cheaper method of monitoring plume
migration and effectiveness of Tc-99 remediation processes at the Hanford site (approx. one day turnaround vs 30 to 45 day turnaround for baseline method; no mobilization for sampling).
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16AMSI
Monitoring Tc-99 in Groundwater
• Customer– Hanford Ground Water Monitoring Program– Potential customers include Fernald,
Paducah• Developer
– Pacific Northwest National Laboratory (Oleg Egorov, John Hartman, Jay Grate, et al)
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17AMSI
Monitoring Tc-99 in Groundwater
• Technology Characteristics– Selectively and reversibly concentrates
technetium (pertechnetate ion) on anion exchange absorption beads; measures light from scintillator beads that emit light when struck by beta particles from the decay of Tc-99.
– LOD for 10 minute counting period = 7 Bq/L
– Regulatory limit = 33.3 Bq/L.
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18AMSI
Monitoring Tc-99 in Groundwater
Tc-99SensingApproach
Sample Inlet Sample Outlet
Sample Cell with Bead Pack
Preconcentrating beads
Scintillating beads
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19AMSI
Monitoring Sr-90 in Groundwater
• Purpose– in situ monitoring of Sr-90 in groundwater
• Benefit– faster, better, cheaper method of monitoring the
effectiveness of Sr-90 remediation (barrier plus pump-and-treat plus phytoremediation) at the Hanford N-Reactor site (approx. one day turnaround vs 30 to 45 days for baseline method; no mobilization for sampling)
• Customer– Hanford Groundwater Monitoring Program
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20AMSI
Monitoring Sr-90 in Groundwater• Developer
– Pacific Northwest National Laboratory(Ron Brodzinski)
• Technology Characteristics– Measures Cherenkov light produced in
water by high-energy beta particles from decay of Y-90 daughter of Sr-90
– Drinking water standard is 8 pCi/l– Lab prototype sensitivity = 14 pCi/l– Target is 1.4 pCi/l (larger cell; longer times)
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21AMSI
Wireless Sensor Platform(Monitoring moisture in landfill covers)
• Purpose– Wireless means of powering and “reading”
sensors embedded in landfill covers (e. g., volumetric soil content and soil water potential)
• Benefit– Monitor barrier performance, provide early
notice of degradation, need for maintenance– No wires need penetrate to the subsurface
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22AMSI
Wireless Sensor Platform(Monitoring moisture in landfill covers)
• Customer– Idaho National Engineering and Environmental
Laboratory– Other western DOE sites are potential customers
• Developer– INEEL (Dennis Kunerth, John Svoboda)
• Technology Characteristics– An induction coil both powers the sensors and
collects the sensor output via rf signal generated by embedded microprocessor
– Prototype functional to 8 ft bgs in dry Idaho soil
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23AMSI
Wireless Sensor Platform(Monitoring moisture in landfill covers)
Landfill
Backfill
Topsoil
Data LoggerInduction Coil/Antenna
Sensor Packages
• Measurement concept, with multiple sensor packages.
• Each package contains multiple sensors and can be individually interrogated.
• The surface data logger is portable but it can be left in place.
Barrier
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24AMSI
Wireless Sensor Platform(Monitoring moisture in landfill covers)
• The red coil is the platform power receiver and data transmission antenna.
• The PC board attached to the antenna is the microprocessor and A to D converter.
• A partially assembled system shown at the left includes (at the bottom):
• A heat dissipation sensor (beige) for measuring soil water potential
• A TDR sensor (green) for measuring volumetric water content
• The sensors are commercially available.
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25AMSI
Testing the INEEL Wireless Sensor Platform at the NTS
Note loop antenna and data logger box for charging / readout
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26AMSI
Monitoring Cr(VI)Using Universal Sensor Platform
• Purpose– Provide in situ real-time monitoring of Cr(VI)
in groundwater
• Benefit– Much better temporal monitoring coverage
without much greater cost.
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27AMSI
Monitoring Cr(VI)Using Universal Sensor Platform
• Customer– Hanford Groundwater Monitoring Project
• Accurately monitor Cr(VI) in the pore water of Columbia River sediments and gravel beds (salmon spawning area), which are fed by contaminated groundwater from the DOE Hanford site
• Ensure that groundwater remediation activities are producing desired consequences for protection of aquatic species (salmon)
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28AMSI
Monitoring Cr(VI)Using Universal Sensor Platform
• Developer– Burge Environmental (Scott Burge)
• Uses a colorimetric reaction with diphenylcarbazide and the Burge “universal” sampling, analysis, and calibration system
– PNNL (John Hartman & Oleg Egorov• Cr(VI) determination without reagents, using
liquid core optical waveguide and UV/Vis absorption spectrometry
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29AMSI
Monitoring Cr(VI)Using Universal Sensor Platform
• Technology Characteristics– Regulatory standard is 11 ppb. – Automated hourly measurements. – Automated in-field calibration. – Duty cycle of at least several days
(e. g., to replenish reagent in Burge case).– PNNL LOD ~ 1 ppb– Burge Environmental LOD ~ 1 ppb.
Reagent reservoir ~ 100 analyses (100 hours).
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30AMSI
Monitoring Cr(VI)Using Universal Sensor Platform
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31AMSI
Burge Universal Sensor Platform
• Solar power & battery storage
• Sample pumps
• Stirring motor
• Air compressor
• Valves
• Green LED photoabsorption cell
• Field calibration capability
• Laptop computer
• RF modem for remote control & data communication
Models for monitoring chloroform, tricloroethylene are also available.
http://www.burgenv.com/index.html
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32AMSI
Key AMSI Achievements
• Involving end-users
• Getting end-user commitment to include the product in their application baseline
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33AMSI
AMSI Contacts
• John B. Jones, USDOE NSO(702) [email protected]
• Charles Lohrstorfer, Bechtel Nevada(702) [email protected]