ML20094B470
| ML20094B470 | |
| Person / Time | |
|---|---|
| Issue date: | 11/24/1975 |
| From: | Office of Nuclear Reactor Regulation |
| To: | |
| References | |
| NUREG-75-087, NUREG-75-087-02.3.2, NUREG-75-87, NUREG-75-87-2.3.2, SRP-02.03.02-01, SRP-2.03.02-1, NUDOCS 9511010070 | |
| Download: ML20094B470 (5) | |
Text
NUREG.75/087 p urg'o s
q U.Se NUCLEAR RESULATCRY COMMIM10N y
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,1 STANDARD REVIEW PLAN s
OFFICE OF NUCLEAR REACTOR REGULATION P
SECTION 2.3.2 LOCAL METEOROLOGY REVIEW RESPONSIBILITIES Primary - Site Analysis Branch (SAB)
Secondary - None I.
AREAS OF REVIEW Information is presented by the applicant and reviewed by the staff concerning the local (site) meteorological parameters, an assessment of the potential influence of the plant and its facilities on local meteorological conditions, and a topographical description of the site and its environs. The review covers the following specific areas.
1.
A description of the local (site) meteorology in tems of airflow, temperature, atmospheric water vapor, precipitation, fog, and atmospheric stability.
2.
An assessment of the influence of the plant and its facilities on the local meteorological parameters listed in (1), including the effects of plant structures, terrain modification, and heat and moisture sources due to plant operation.
3.
A topographical description of the site and its environs, as modified b" the plant structures, including the site boundary, exclusion zone, and low popula.in zone.
II. ACCEPTANCE CRITERIA The information in this section will be acceptable if the local meteorological and topographic descriptions of the site area applicable both before plant construction and during plant operation are adequately documented such that meteorological impacts on plant design and operation as well as the impact of the plant on local meteorological conditions can be re.
11 ably predicted. Specifically, the following information is needed for acceptance. This information should be fully documented and substantiated as to its representativeness of conditions at and near the site.
1.
Local sumaries of meteorological data based on onsite data and National Weather Service station sumaries or other standard installation summaries from appropriate nearby locations should be presented.
USNRC STANDARD REVIEW PLAN
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11/24/75 9511010070 751124 PDR NUREO 75/087 R PDR
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The following summaries are r1 quired:
a.
Monthly and annual wind roses and tabular data, and wind direction persistence summaries, b.
Monthly and annual air temperature sumaries including averages, measured e
extremes, and diurnal variations, Monthly and annual sumaries of atmospheric water vapor (absolute and relative) c, including averages, measured extremes, and diurnal variations, d.
Monthly ao annual summaries of precipitation (rain and snow) including averages, measured extremes, and intensity-duration data, e.
Monthly and annual sumaries of fog (and smog) including expected values ano extremes of frequency and duration.
f.
Monthly and annual summaries of atmospheric stability (AT), including frequency and duration (persistence) of inversion conditions if data are available.
2.
A discussion and evaluation of the influence of the plant and its facilities on the local meteorological conditions are required. Potential changes in normal and extreme values presented in SAR Section 2.3.2.1 resulting from plant construction and operation should be made.
3.
A complete topographical description of the site and environs out to a distance of 50 miles from the plant, as described in Standard Format Section 2.3.2.3 should be provided(Ref.1).
III. REVIEW PROCEDURES 1.
The sumaries listed in Section 2.3.2.1 of the Standard Format are reviewed for completeness and adequacy of basic data. The wind and atmospheric stability data should be based on onsite data if possible since airflow and vertical temperature structure can vary substantially from one location to another and are inputs to the assessment of atmospheric diffusion conditions at the site. The other summaries should be based on nearby representative stations with long periods of record since the locally measured extremes in intensity and frequency are compared to design basis values presented in Section 2.3.1 of the safety analysis report or are used by other branches to determine whether these meteorological conditions are limiting con-itions for design and emergency procedures. When offsite data are used, a determination is made of how well the data represent site conditions and whether more representative data are available. National Oceanic and Atmospheric Administration (NOAA) state meteorological summaries (Ref. 2), local climatological data (Ref. 3), and various NOAA Environmental Data Service summaries are used by the reviewer to evaluate the represent-ativeness of stations and periods of record. The reviewer visits all primary meteoro-logical data collection locations.
2.3.2-2 11/24/75 Y
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2.
The revicw procedure for evaluating the contents of Section 2.3.2.2 of the SAR is as follows:
a.
Detennine the terrain modifications that will occur as a result of plant construction such as removal of trees, leveling of ground, and installation of lakes and ponds.
b.
Detennine the location, size, and materials used for plant structures in-cluding buildings, switchyard gear, parking lots, and roads.
c.
Determine and quantify the heat and moisture sources that will result from plant operations.
'd.
Relate the input information in items a,b, and C, above, to local meteorological i
modifications, j
i e.
Compare the reviewer's assessment with that of the applicant.
3.
Section 2.3.2.3 is reviewed for completeness in accordance with the specifications of the Standard Format. The reviewer assures that all topographic maps and topo-graphic cross-sections presented by the applicant are legible and well-labeled so that the infonnation needed during the review can be readily extracted. Reference points and the direction of true north should be checked carefully. Points of.
interest such as plant structures, site boundary, and exclusion zone should be marked on the maps and diagrams.
The reviewer compares the applicant's assessment of the effect of topography to standard assessments such as those presented in " Meteorology and Atomic Energy -
1968" (Ref. 4) and decides whether the standard regulatory atmospheric diffusion models (dis. cussed in Standard Review Plans 2.3.4 and 2.3.5) are appropriate for this site.
IV. EVALUATION FINDINGS The reviewer verifies that sufficient information has been provided and that his evaluation supports concluding statements of the following type, to be included in the staff's safety evaluation report:
"The applicant has provided adequate information on local metaorological and air quality conditions that are of importance to the safe design and siting of this plant."
This statement will be preceded by a resume of local meteorological and air quality j
parameters appropriate to the site.
2.3.2-3 11/24/75
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REFER.ENCES 1.
Regulatory Guide 1.70, " Standard Format and Content of Safety Analysis Reports for Nuclear Power Plants," Revision 2.
i 2.
U.S. Department of Connerce. " State Climatological Sunnary," Environmental Data Service NOAA, published annually by state.
3.
U.S. Department of Connerce, " Local Climatological Data and Comparative Data,"
Environmental Data Service NOAA, published annually for all first-order NWS Stations.
4.
D.H. Slade (ed.), " Meteorology and Atomic Energy - 1968," TID-24190. Division of Technical Infonnation..USAEC (1%8).
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