Document: NUREG-0800
Document ID: 07d0f658-6bc5-4c2f-945b-45ffacf5d379
Document Type: srp
Title: ONSITE METEOROLOGICAL MEASUREMENTS PROGRAM
Source: NUREG-0800
Source URL: https://www.nrc.gov/docs/ML0636/ML063600394.pdf
Revision Date: 2023-06
Chapter: 2
Section ID: 2.3.3
CFR Part: 
CFR Title: 

Content:
ation is to provide measurements which represent the overall site meteorology without plant structure interference, the tower position(s) should have been selected with this general objective in mind. Examination of topographical maps, which have been modified to show the likely finished plant grade, a site visit, and professional judgment on airflow patterns are used to determine and evaluate the representativeness of the location(s). The proposed plant structure layout, including structure heights, is examined for potential influence on meteorological measurements. Sensors should be located at least 10 obstruction heights away from the obstruction to minimize this influence. b. Meteorological Sensors The type and performance specifications of the sensors are evaluated. Manufacturers' specifications and analysis, and operating experience for these sensors are considered in evaluation of adequacy with respect to accuracy and 2.3.3-9 Revision 3 - March 2007 the potential for acceptable data recovery. Standardized evaluations such as Reference 9 and operational experience reports contained in research papers are utilized. The suitability of the specific type of sensor for use in the environmental conditions at the site is evaluated. To this end, the range of wind conditions and the ability of the sensors to withstand corrosion, blowing sand, salt, air pollutants, birds, and insects are considered. If the sensors are new and unique, a meteorological instrumentation expert may need to be consulted. c. Recording of Meteorological Sensor Output The methods of recording (e.g., digital or analog, instantaneous or average, engineering units or raw voltages) and the recording equipment, including performance specifications and location of this equipment, are evaluated. Manufacturers' specifications and operating experience for the recorders are considered in evaluation of adequacy with respect to accuracy and the potential for acceptable data recovery. The controlled