ML19221A948
| ML19221A948 | |
| Person / Time | |
|---|---|
| Issue date: | 03/31/1979 |
| From: | Office of Nuclear Reactor Regulation |
| To: | |
| References | |
| NUREG-75-087, NUREG-75-087-02.1.3, NUREG-75-87, NUREG-75-87-2.1.3, SRP-02.01.03, SRP-2.01.03, NUDOCS 7907120020 | |
| Download: ML19221A948 (4) | |
Text
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f ") ) g U.S. NUCLEAR REGULATORY COMMISSION Wq"3p['!STANDARD REVIEW PLAN
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OFFICE OF NUCLEAR REACTOR REGULATION SECTION 2.1.3 POPULATION DISTRIBUTION REVIEW RESPONSIBILITIES Primary - Accident Analysis Branch ( AAB)
Secondary - None I.
APEAS OF REVIEW Areas of the applicant's safety analysis report (SAR) relating to the population sur-rounding a nuclear facility reviewed are:
The present popu'ation (based on 1970 census data or more recent census data, if i.
available), and a comparison of the applicant's projected population growth with independent projecticns made by other agencies such as the Census Bureau, Bureau of Economic Analyses, Environmental Protecticn Agency, and local and state agencies and Councils of Government.
2.
Whether population density should be a significant consid nation at the construction permit (CP) stage in alternate site evaluation. Prestet and projected transient populations, appropriately weighted by occupancy, c'.id be included.
3.
Within the specified low population zone (LPZ), the ability to take appropriate protective measures in behalf of the populace contained within the LPZ in the event of a serious accident.
4.
The distance to the nearest boundary of the closest por flation center (as defined in Part 100), and its relationship to the low population.on' outer boundary distance.
II. ACCEPTANCE CRITERIA The data on present pcpulation in the region of the site a o based on 1970 or more recent census data and population numbers check reasonably well against other independently-obtained poculation c ua, if available; e.g., Census Bureau Enumeration District tapes.
The projected populations at the approximate year of plant startup and over the expected life of the plant are acceptable if they check reasenably well against independently-obtained population projections, if available; e.g., OBERS,N BEA,E or Water Resource Council.
@oERS is the descriptive title of a projection program conducted by the U.S. Department of Comerce fomer Office of Business Economics (OBE), now renamed the Bureau of Economic Analysis (BEA), and the Economic Research Service (ERS) of the U.S. Department of Agriculture.
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Transient prolations are included for those sites where a significant number of people
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(other than those just passing through the area) work, reside part-time, or engage in recreational activities, and are not pennanent residents of the area.
The specified low population zone is acceptable if (a) it is determined that appropriate protective measures could be taken in behalf of the enclosed populace in the event of a serious accident; and (b) the nearest boundary of the closest population center (as defined in Part 100) is at least one and one third times the distance from the reactor to the outer boundary of the low population zone.
The population center distance is acceptable if there are no likely concentrations of greater than 25,000 people over the plant lifetime closer than the distance designated by the applicant as the population center distance.
III. REVIEW PROCEDURES Selection and emphasis of various aspects of the areas covered by this SRP section will be made by the reviewer on each case. The judgment on the areas to be given attention during the review is to be based on an inspection of the material presented, the similarity of the material to that recently reviewed on other plants, and whether items of special safety significance are involved.
Detennine that th population data contained in the SAR is in the detail and in the format described in Reference 3, Section 2.1.3.
Compare the SAR present population data against whatever independent population data is available (e.g., Census Bureau CED tapes, special census which may have txen conducted,
local and state agencies, Councils of Goverrrent, etc), hote any significant dif ferences which require clarification.
Compare the SAR population projections against whatever independent population projections are available (e.g., local and state agencies and Councils of Government, Census Bureau projections, Bureau of Economic Analysis, etc). Note any significant underestimates in the SAR which require clarification.
At the construction permit stage, de the population and its distribution, including weighted transients, projected to the year of plant startup and projected over the lifetime of the plant, to determine the population density in persons per square mile as a function of distance from' the plant out to 30 miles. Compare results to the SAR plot of population density vs distance (Reference 3, Section 2.1.3.6),
If the population density, including weighted transient population, projected at the tire of initial operation exceeds 500 persons per square mile averaged over any radial distance out to 30 miles (cumulative pop-ulation at a distance dividad by the area at that distance), or the projected pop"lation density over the lifetime of the facility exceeds 1,000 persons per square mile averaged over any radial distance out to 30 miles, a memorandum should be prepared advising
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[j La Rev. I 2.1.3-2
appropriate staff personnel that an evaluation of alternative sites having lower popula-tion densities will be required.
Determine that the SAR includes a map of the low population zone and a table of population distribution which includes transients (Reference 3, Section 2.1.3.4). Determine the method used by the applicant to establish the boundary of the nearest population center (Reference 3, Section 2.1.3.5).
Evaluate comunities which are closer to the plant than the designated population center tn detarmine the likelihood that any of them can be pro-jected to grow to 25,000 people witnin the plant lifetime. Compare the distance to the boundary of the population center to the distance to the outer boundary of the low popula-tion zone and establish that the population center distance is at least one and one-third times the low population zone distance as required by Part 100.
Population and population density data of specific towns and cities within the low popula-tion zone can be checked against population data as contained in the Departrent of Comerce publication, "1970 Census of Population - Characteristics of the Pcpulation,' and other Census Cureau publications.
Site population is compared to previously licensed sites to deterwine the relative popula-tior. characteristics of the proposed site. Curves showing current and projected popula-tion as a function of distance may be prepared for use in the staf f's safety evaluation report (SER).
Determine that the current and projected population data for the LPZ includes transients (e.g., workers, occupants of schools, hospitals, etc., recreational facilities).
Determine the acceptability of the LPZ with respect to the necessary finding that there is reasonable assurance that appropriate protective measures could be taken in behalf of the people within the LPZ in the event of a serious accident. [Part 100, Section 100.3(b)].
Determine that the nearest boundary of the closest population center is at least one ano one-third times the distance to the outer boundary of the low population zone. Evaluate the characteristics of the land area between the plant and the nearest population grouping which has, or is projected to have during plant lifetime, a population of about 25,000.
Use whatever data is available on land use, land use controls such as zoning, potential for grow;h, or factors which are likely to limit growth between the population grouping and the slant to determine the potential growth in population density toward the site. The popu ation center boundary should be established at that point nearest the plant where, in the 'eviewers judg.sc, the population density may grow to a value comparable to the density o f tt e corruni ty i ts e l f. Population density is the controlling criteria, and in this regard,
the c orporate boundary of the community itself is not limiting. The detail to which this aspec: of the site is reviewed will depend on the distance of the nearest probable popula-tion enter relative to the distance to the outer boundary of the low population zone.
(See Eaferences 4 and 5.) WI.ere a very large city is involved, a greater distance than the one and one-third factor may be required, and appropriate additional compensating engineered safeguards may be required. These will ce tvaluated on a case-by-case basis.
145 2 Ms Rev. I 2.1.3-3
Results of the review under this SRP section should be forwarded to the Division of Operating Reactors whenever the site contains a previously licensed and operating nuclear unit.
IV.
EVALUATION FINDINGS The reviewer verifies that sufficient information has been provided, and that his evaluation is sufficiently complete and adequate to support conclusions of the following type, to be included in the staff SER:
"The present and projected populations surrounding the site, ir.-luding transients, have been reviewed and comparison with independently obtained population data con-firms the applicant's estimates.
"On the basis of the specified low population znne and population center distance, and the calculated radiological consequences of design basis accidents at the outer boundary of the low population zor.e (Section 15), it is concluded that the low popu-lation zone and population center distance meet the guidelines of 10 CFR Part 100 and are acceptable."
V.
REFERENCES 1.
"1972 OBERS Projections," Vol. 1-5, U.S. Water Resources Council, Washington, D.C.
(1972).
2.
"1970 Census of Population, Characteristics of the Population," Vol.1, Part A, Sections 1 and 2, Bureau of the Census, U.S. Department of Correrce (1972).
3.
Regulatory Guide 1.70, " Standard Fomat and Content of Safety Analysis Reports for Nuclear Power Plants," Revision 2.
4.
NUREG-0308 Safety Evaluation Report, Arkansas Nuclear One, Unit 2.
November 1977
,ad supplements.
5.
NUREG-75/054 Safety Evaluation Report, Pilgrim Nuclear Generating Station, Unit 2.
June 1975 and supplements.
145 236 Rev. I 2.1.34