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:
anufacturers' 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 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. d. Instrumentation Surveillance The inspection, maintenance, and calibration procedures and their frequency are evaluated. These surveillance procedures and the frequency of attention that the instrumentation systems receive are compared to operating experience at this site and other sites with similar instrumentation with the objective of determining that acceptable data recovery, with acceptable accuracy, will be obtained throughout the duration of the meteorological program. The ability of instrumentation systems to function throughout the course of accidents is evaluated. Criteria for acceptable accuracy and acceptable data recovery are specified in Regulatory Guide 1.23. Additional information is provided in Refs. 10, 11, and 12. e. Data Acquisition and Reduction The procedures, including both hardware and software for data acquisition and reduction, are evaluated. Since there are many methods of acquiring data from meteorological measurement systems which are acceptable to the staff, the 2.3.3-10 Revision 3 - March 2007 review procedure varies. The basic components of the program which are reviewed to ascertain the acceptability of data acquisition and reduction are: (1) Accuracy of direct measurements and their precision, (2) Accuracy in conversion of direct measurement units to meteorological units, (3) Adequacy