Document: NRC Regulatory Guide
Document ID: 29acb072-d497-44e6-ac1c-a053c0a468a0
Document Type: regulatory_guide
Title: Meteorological Monitoring Programs for Nuclear Power Plants + HISTORY - HISTORY DG-1164 , Third Proposed Revision 1, published 10/2006 Draft ES 926-4 , Second Proposed Revision 1, entitled "Meteorological Measurement Program for Nuclear Power Plants," published 04/1986 Draft SS 926-4 , First Proposed Revision 1, entitled "Meteorological Programs In Support of Nuclear Power Plants," published 09/1980 Revision 0, entitled "Onsite Meteorological Programs," was issued as Safety Guide 23
Source: NRC Regulatory Guide Division 1
Source URL: https://www.nrc.gov/docs/ML0625/ML062540408.pdf
Revision Date: 2023-06
Chapter: 
Section ID: RG-1.23
CFR Part: 
CFR Title: 

Content:
gitude), dates of data, information explaining data contained in the “other” fields if they are used, heights of measurements, and any additional information pertinent to the identification of the file (e.g., type of moisture measurements). Ensure that all five records are included, even if some are blank. Use 160A1 as the format for the first five records. The remaining records, one per hour, contain the meteorological data in the format A4, I4, I3, I4, 25F5.1, F5.2, 3F5.1. Check the file to ensure quality (e.g., compare against the raw data to ensure that the electronic file has been properly formatted, unit conversions are correct, and invalid data are properly identified). Provide all data to the tenth of a unit, except solar radiation, which should be provided to a hundredth of a unit. This does not necessarily indicate the accuracy of the data (e.g., wind direction is usually given to the nearest degree). Use all nines in any field to indicate a lost record (99999). Use all sevens in a wind direction field to indicate calm (77777). If there are only two levels of data, use the upper and lower levels. If there is only one level of data, use the upper level. NOTE: The sigma theta, moisture, solar radiation, and visibility measurements listed in the following pages are not required measurements but should be provided if they are available. Appendix A to DG-1164, Page A-2 METEOROLOGICAL DATA ON ELECTRONIC MEDIA LOCATION: DATE OF DATA RECORD: A4 Identifier (can be anything) I4 Year I3 Julian Day I4 Hour (on 24-hour clock) ACCURACY F5.1 Upper Measurements: Level = _____ meters _____ F5.1 Wind Direction (degrees) _____ F5.1 Wind Speed (meters/second) _____ F5.1 Sigma Theta (degrees) _____ F5.1 Ambient Temperature (EC) _____ F5.1 Moisture: _____ _____ F5.1 Other: _____ _____ F5.1 Intermediate Measurements: Level = _____ meters _____ F5.1 Wind Direction (degrees) _____ F5.1 Wind Speed (meters/second) _____ F5.1 Sigma Theta (degrees) _____ F5.1 Ambient Temperature