AN OVERVIEW OF THE TVA METEOROLOGICAL DATA MANAGEMENT PROGRAM

Transcription

1 AN OVERVIEW OF THE TVA METEOROLOGICAL DATA MANAGEMENT PROGRAM NUMUG June 30, 2005 Wayne Hamberger (865)

2 Background and Recent Information TVA meteorological data management program last year went through a self assessment (audit) and findings are being implemented this summer. Findings involve training more folks in data management, dedicating a server to share information from different locations, converting paper records to electronic, improving data flags. Updated data management procedure last month with flowcharts describing process. I will point out recent changes throughout the presentation.

3 TVA METEOROLOGICAL DATA MANAGEMENT OUTLINE Meteorological instruments Data collection and processing Data review Data validation and processing Data archival and retrieval

4 Meteorological Instrumentation Wind Direction and Speed Air Temperature Dew Point Temperature Solar Radiation Precipitation

5 Watts Bar Meteorological Tower

6 Meteorological Instrumentation 91, 46, & 10 Meters Ultrasonic wind sensor WD & WS calculated from speed of sound differences along 3 axes Measured every 5 seconds Wind Direction and Speed

7 Meteorological Instrumentation 91, 46, and 10 meters T for 91-10, 91-46, and layers Platinum resistance thermometer (RTD) Resistance is a function of temperature Mounted in motor aspirated shield Measured every minute Air Temperature

8 10 meters Meteorological Instrumentation On separate tower Platinum resistance thermometer (RTD) Chilled mirror with air pump in EDS Measured every minute Dewpoint Temperature

9

10

11 Meteorological Instrumentation 1 meter (surface) Pyranometer Differential thermocouple with alternating black and white surfaces Measured every 15 seconds Solar Radiation 13

12

13 TVA METEOROLOGICAL DATA MANAGEMENT OUTLINE Meteorological instruments Data collection and processing Data review Data validation and processing Data archival and retrieval

14 5-second, 15-second, 1-minute, & 15-minute Raw Data Signals EDS Computer 15-minute & 1-hour Data Summaries 15-minute & 1-hour Data Summaries Remote Access Computer 1-minute, 15-minute, & 1-hour Data Summaries Emergency Preparedness General Use nuclear plant Integrated Computer System (ICS) CECC Computer Accident Dose Estimates JFDs for Dose Assessment River Scheduling Cooling Tower Operations Operational & River Studies Validated Data Environmental Technologies Climatological Reviews Rainfall Data for NPDES Permit FSAR input Weather-related design input TVA Nuclear Data Users General Use

15 Meteorological Data Calibration and Maintenance Records EDS Data Computers EPFS Central Labs Automatic transfers. Meteorological Data - Hourly - 15-minute Scan & Copy to Server (as needed) Manual transfers performed by clerical staff. Remote Access Computer (RAC) SERVER Manual transfers. Meteorological Data - Hourly - 15-minute 1 or both Transfer Records Files (as needed) Manual transfers performed by meteorologists. LOCAL PC LOCAL PC Knoxville PC Muscle Shoals PC

16 Data Transmission The following data and units are transmitted: Resultant Wind Direction (degrees) - direction blowing from Resultant Wind Speed (miles/hour) Average Wind Speed (miles/hour) Sigma Theta (degrees) - standard deviation of wind direction Air Temperature (degrees F) Dew Point Temperature (degrees F) Solar Radiation (langleys/minute) Rainfall (inches)

17 TVA METEOROLOGICAL DATA MANAGEMENT OUTLINE Meteorological instruments Data collection and processing Daily Data review Data validation and processing Data archival and retrieval

18 Start Download data from RAC A1 Meteorological Data - Hourly - 15-minute A2 Prepare data summaries LOCAL PC Perform initial data screening A3 Meteorological Hourly Data printout Flagged Hourly Data printout Air Temperature/Dewpoint Hourly Data printout Air Temperature 15-minute Data plot Air Temperature/Dewpoint Hourly Data plot SERVER Copy to Server A4 wm*.xls wm*.prn wm*.raw wt*.raw sm*.xls sm*.prn sm*.raw st*.raw bm*.xls bm*.prm bm*.raw bt*.raw flagmet.xls dpt.xls mettemp2.xls A5 Determine if problem solving is needed D1 Missing or anomalous data? No Yes A Proceed to Problem Solving B Proceed to

19

20

21

22

23 M TEMP VS 10 M DPT SQN/WBN HOURS SQN AT SQN DPT WBN AT WBN DPT DEGREES

24 TIME M AIR T M AIR T M AIR T DEGREES F

25 Sequence of Events to Resolve 10 Meter Air Temperature Problem Any maintenance activity contributing to spike and drop? Field SIMs troubleshoot on ground and at 10 meters and found no problems but tighten connections. Abnormal spiking and dropping returns 3 days later. Computer group obtains 1 minute readings from plant computer. Erroneous data are few, but bad data has large errors and skew 15 minute averages. Consulting with field SIM, computer, and program leads points to a bad RTD. Field SIMs arrange for climber to exchange set of RTDs. Erroneous readings become more frequent until climber exchanges RTDs. New set of RTDs eliminate erroneous data. RTDs sent to instrumentation lab for as found calibration. Problem Evaluation Report (PER) documents problem and corrective action for trending purposes.

26 TVA METEOROLOGICAL DATA MANAGEMENT OUTLINE Meteorological instruments Data collection and processing Daily Data review Data validation and processing Data archival and retrieval

27 A From Initial Analysis A6 D From Data Validation Review records D2 Problem resolved? No Yes D5 TVAN PER Required? Yes No A7 A10 A11 Contact EPFS Notify TVAN Document actions taken C Proceed to Data Validation Problem resolved? D3 Yes Data Validation Log No A8 Consult with CLS, CEG, EnvTech, TVAN, etc. Yes Problem resolved? D4 No A9 Initiate discussions for recurring problems SERVER

28 C From Problem Solving Assemble necessary materials A12 A13 Perform supplemental data processing B From Initial Analysis Daily Weather Maps. Problem Evaluation notification and other Correspondence. Weather Observations and/or images from Internet. Close interval data or plots of observations requested from CEG. LOCAL PC Daily digital hourly data files or printouts. 15-minute data files or printouts of daily air temperature graphs. Flagged hourly data. EPFS records associated with sensors or equipment. CLS records associated with sensors or equipment. Data Validation Log (DVL). Review information D6 Data correction necessary? No D7 Sensor exchange? No A14 A16 Examine records for sensor traceability Yes Yes Data Validation Log (DVL) A15 Verify data correction with EPFS A17 Document actions & information Review digital data A18 Factors in the judgment of questionable values Concurrent synoptic situation. Topographical influences. Concurrent data from nearby sites. Continuity. Site climatology. Seasonal trends. Collection system characteristics. JFDs of meteorological data. Data before and after a sensor exchange. Recover/adjust data (as needed) A20 Verify data agrees with meteorology conditions Create marked-up data file Additional problems? D Yes A19 A21 D8 Proceed to Problem Solving No Data Validation Information E Updated Data Files Proceed to Data Processing SERVER

29 E From Data Validation A22 Make changes to data file SERVER A23 Reformat files for Mainframe A24 Periodically send files to Mainframe Archive Files (validated data) A25 Perform file maintenance CD-ROM s of raw and validated data A26 Generate and distribute reports Data Recoverability Report (Quarterly) Stop Other Reports (as needed)

30

31 Conclusion Using EXCEL and macros to collect and process data, edit and plot data, and create file to be archived is quick, efficient, and convenient for others in TVA to use. Recently changed process so personnel from Muscle Shoals can perform data review. Data validation manual will be written to document details so different personnel can implement data management function. Use more climatology and close interval data plots to improve flagging data during daily review. Acknowledgements Any questions??