- Author
-
Martins, S. A.
|
Shinn, J. H.
- Title
- CHAWS User's Guide: System Description and Standard Operating Procedures, Johnston Island JCAD Facility.
- Coporate
- Lawrence Livermore Lab., CA
- Sponsor
- Department of Energy, Washington, DC
- Report
-
UCRL-CR-105263; MIPR M8-53-13
July 1990
141 p.
- Distribution
- Available from National Technical Information Service
- Contract
- DOE-CONTRACT-W-7405-ENG-48
- Keywords
-
computer graphics
|
data processing
|
computer programs
|
education
|
emissions
|
hazardous materials
|
manuals
|
measuring instruments
|
meteorology
|
installing
|
safety
- Identifiers
- chemical effluents; computerized control systems; computer codes; computer networks; documentation; data acquisition; data transmission; flowsheets; real time systems
- Abstract
- The Chemical Hazard Warning System (CHAWS) is designed to collect meteorological data and to display, in real time, the dispersion of hazardous chemicals that may result from an accidental release. Meteorological sensors have been placed strategically around the Johnston Island JCAD Facility and are used to calculate direction and hazard distance for the release. Based on these data, arrows depciting the release direction and distance traveled are graphically displayed on a computer screen showing a site map of the facility. The objectives of CHAWS are ad follows: to determine the trajectory of the center of the mass of released material from the measured wind field; to calculate the dispersion of the released material based on the measured lateral turbulence intensity (sigma theta); to determine the height of the mixing zone by measurement of the inversion height and wind profiles up to an altitude of about 1 km at sites that have SDAR units installed; to archive meteoreological data for potential use in climatological descritions for emergency planning; to archive air-quality data for preparation of compliance reports; to provide access to the data for near real time hazard analysis purposes.