CHAWS user's guide: System description and standard operating procedures, Johnston Island JCAD Facility

Technical Report · Sun Jul 01 04:00:00 EDT 1990

OSTI ID:5408421

Martins, S A; Shinn, J H ^[1]

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1. eds.

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 depicting 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 as 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 SODAR units installed; to archive meteorological data for potential use in climatological descriptions 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.

• Research Organization: Lawrence Livermore National Lab., CA (United States)
• Sponsoring Organization: DOD; Department of Defense, Washington, DC (United States)
• DOE Contract Number: W-7405-ENG-48
• OSTI ID: 5408421
• Report Number(s): UCRL-CR-105263; ON: DE92011918
• Country of Publication: United States
• Language: English

Related Subjects

54 ENVIRONMENTAL SCIENCES
540120* -- Environment
Atmospheric-- Chemicals Monitoring & Transport-- (1990-)
99 GENERAL AND MISCELLANEOUS
990200 -- Mathematics & Computers
CHEMICAL EFFLUENTS
CHEMICAL WASTES
COMMUNICATIONS
COMPUTER CODES
COMPUTER GRAPHICS
COMPUTER NETWORKS
COMPUTER PROGRAM DOCUMENTATION
COMPUTERIZED CONTROL SYSTEMS
CONTROL SYSTEMS
DATA ACQUISITION
DATA PROCESSING
DATA TRANSMISSION
DIAGRAMS
DOCUMENT TYPES
EDUCATION
EMISSION
FLOWSHEETS
HAZARDOUS MATERIALS
INSTALLATION
MANUALS
MATERIALS
MEASURING INSTRUMENTS
METEOROLOGY
NONRADIOACTIVE WASTES
ON-LINE CONTROL SYSTEMS
ON-LINE SYSTEMS
OPERATION
PROCESSING
REAL TIME SYSTEMS
SAFETY ANALYSIS
WASTES