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Stephen A. Vigeant: Shaw E&I Carl A. Mazzola: Shaw E&I H. Wesley Nance: Washington TRU Solutions

Consideration of Micrometeorological Trends Associated with WIPP Meteorological Data. Stephen A. Vigeant: Shaw E&I Carl A. Mazzola: Shaw E&I H. Wesley Nance: Washington TRU Solutions. October 9, 2003. Outline. WIPP facility and mission Description of meteorological monitoring program

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Stephen A. Vigeant: Shaw E&I Carl A. Mazzola: Shaw E&I H. Wesley Nance: Washington TRU Solutions

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  1. Consideration of Micrometeorological Trends Associated with WIPP Meteorological Data Stephen A. Vigeant: Shaw E&ICarl A. Mazzola: Shaw E&IH. Wesley Nance: Washington TRU Solutions October 9, 2003

  2. Outline • WIPP facility and mission • Description of meteorological monitoring program • Meteorological data validation process • Effect of micrometeorological trends on data validation and use • Conclusions

  3. WIPP Facility and Mission • WIPP – Waste Isolation Pilot Plant • Underground disposal of Transuranic (TRU) waste and mixed TRU waste • Research and production of nuclear weapons and other defense related activities • Safe, permanent and environmentally sound • 37,000 shipments over next 35 years

  4. WIPP Location

  5. WIPP Facility

  6. WIPP Facility

  7. WIPP Meteorological Monitoring Program • 50-meter tower • Instrumentation at 2, 10, and 50 meters • Wind speed, wind direction, temperature • Ground level pressure, relative humidity, precipitation, solar radiation • Data logger

  8. WIPP Meteorological Monitoring Program

  9. WIPP Meteorological Monitoring Program

  10. WIPP Meteorological Monitoring Program

  11. WIPP Meteorological Monitoring Program

  12. Data Validation Process • Parameter screening criteria • Manual scan of data • Calibration and surveillance notes • Review of surface maps • Professional judgement

  13. Parameter Screening Criteria ParameterDescriptionFlag Wind SpeedValue < 0.3 m/sBelow threshold speed Value > 22 m/sAbove climatology No change in 4 hrsCheck Bearing 10-m > 50-mUnusual occurrence > 4 m/s changeAbrupt change Wind DirectionValue < 0oOut of range Value > 360oOut of range > 50o change, WS > 4 m/sUnusual occurrence 50-10 meter > 25o difference, Unusual occurrence WS > 4 m/s

  14. Parameter Screening Criteria ParameterDescriptionFlag TemperatureValue < -25 oCBelow climatology Value > 45 oC Above climatology > 6 oC change in 2 hrsUnusual occurrence > 11 oC change in 3 hrsUnusual occurrence < 0.5 oC change in 12 hrsUnusual occurrence

  15. Parameter Screening Criteria ParameterDescriptionFlag TemperatureValue > 1.5oC/100 mUnusual occurrence DifferenceValue < -1.5oC/100 m@ nightUnusual occurrence Value > 6.25oC/100 m, Unusual DT-wind 2-m WS > 4 m/s Value < -0.019oC/100 m, Unusual DT-wind 2-m WS > 4 m/s Value > -0.4 and <0.4 oC, Unusual DT-wind 10-m WS < 1 m/s > 2 oC change in 15 minAbrupt change Value > 15oC/100 mUnusual inversion Value < 3.4oC/100 mAutoconvective lapse

  16. Meteorological Data Applications • Database development for dispersion modeling • Annual site environmental report preparation • Support of emergency response actions • Support of ambient radon concentration predictions • Determination of safe conditions for crane/raised platform work

  17. Micrometeorological Trends • 10-m wind speeds > 50-m wind speeds • > 25 deg difference in 10- and 50-m wind directions • Occurrences of autoconvective lapse rates • Occurrences of extreme inversions • Inversions persisting into mid morning

  18. Micrometeorological Trends • Semi-arid desert climate • Large vertical variations • Nocturnal boundary layer • Decoupling of surface layer • Low-level jet

  19. 10-m > 50-m Wind Speeds

  20. > 25o Difference in Wind Directions

  21. Effects on Data Applications • Data recovery • Atmospheric dispersion calculations • Emergency response • Ambient radon predictions

  22. Conclusions • Awareness of micrometeorological trends • Unusual meteorological regime • Avoid invalidating good data • Data recovery • Impacts on applications

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