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:
eter Level; ∆T between Meters and Meters <0.5 0.5– 1.0 1.1– 1.5 1.6– 2.0 2.1– 3.0 3.1– 4.0 4.1– 5.0 5.1– 6.0 6.1– 8.0 8.1– 10.0 >10.0 TOTAL N NNE NE ENE E ESE SE SSE S SSW SW WSW W WNW NW NNW VARIABLE Total Number of Calms: Number of Missing Hours: Values in this table can be in counts or percent of total valid hours. DG-1164, Page 14 D. IMPLEMENTATION This section provides information to applicants and licensees regarding the NRC staff’s plans for using this draft regulatory guide. No backfitting is intended or approved in connection with its issuance. The NRC has issued this draft guide to encourage public participation in its development. Except in those cases in which an applicant or licensee proposes or has previously established an acceptable alternative method for complying with specified portions of the NRC’s regulations, the methods to be described in the active guide will reflect public comments and will be used in evaluating (1) submittals in connection with applications for construction permits, standard plant design certifications, operating licenses, early site permits, and combined licenses, and (2) submittals from operating reactor licensees who voluntarily propose to initiate system modifications if there is a clear nexus between the proposed modifications and the subject for which guidance is provided herein. DG-1164, Page 15 REGULATORY ANALYSIS 1. Statement of the Problem The NRC issued the original version of Regulatory Guide 1.23 in February 1972 to describe a suitable onsite meteorological measurements program to collect the basic meteorological data needed to determine the environmental impacts of the plant, perform consequence assessments supporting routine release and design-basis accident evaluations, and support emergency preparedness programs and other applications at power reactor sites. That original issuance is currently the official version of Regulatory Guide 1.23. However, the NRC issued a proposed Revision 1