Document: NUREG-0800
Document ID: 5f467362-94d3-4914-8c2f-2c2332ad595c
Document Type: srp
Title: ONSITE METEOROLOGICAL MEASUREMENTS PROGRAMS
Source: NUREG-0800
Source URL: https://www.nrc.gov/docs/ML0523/ML052340581.pdf
Revision Date: 2023-06
Chapter: 2
Section ID: 2.3.3
CFR Part: 
CFR Title: 

Content:
nalysis, and operating experience for these sensors are considered in evaluation of adequacy with respect to accuracy and the potential for acceptable data recovery. Standard- ized 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 environ- mental 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. 2.3.3-3 Rev. 2 - July 1981 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 opera- ting experience for the recorders are considered in evaluation of adequacy with respect to accuracy and the potential for acceptable data recovery. The controlled environmental conditions in which the recorders are kept (instrument shack or control room) are reviewed for adequacy in accordance with the manufacturers' specifications. The ability to obtain a direct readout from the recorders in situ during routine inspection of systems is checked to ensure that the inspector will be able to relate the recorder output directly to the sensor measurement. Some specific criteria are contained in Regulatory Guide 1.23, Position C.3. The reviewer determines that there are provisions for proper display of measurements of wind direction, wind speed, and vertical temperature difference in the control room during plant operation. d. Instrumentation Surveillance The inspection, maintenance, and calibration procedures and their frequency are evaluated. These surveillance procedures and