ML13333A303
| ML13333A303 | |
| Person / Time | |
|---|---|
| Site: | San Onofre  |
| Issue date: | 09/11/1978 |
| From: | Ziemann D Office of Nuclear Reactor Regulation |
| To: | James Drake Southern California Edison Co |
| References | |
| NUDOCS 7810020109 | |
| Download: ML13333A303 (9) | |
Text
UNITED STATES 0
aNUCLEAR REGULATORY COMMISSION WASHINGTON, D. C. 20555 10 September 11, 1978 Docket No.
50-206 Southern California Edison Company ATTN:
1r. James H. Drake Vice President 2244 Walnut Grove Avenue Post Office Box 800 Rosemead, California 91770 Gentlemen:
Enclosed are copies of our draft evaluation of three Systematic Evaluation Program (SEP) topics.
You are requested to examine the facts upon which the staff has based its evaluation and respond either by configigg that the facts are correct, or by ideattin9.
gr-y r.. If in error, please supply corrected information for the docket. We encourage you to supply for the docket any other material related to these topics that might affect the staff's evaluation.
It would be most helpful if your comments were received within 30 days of the date you receive this lettWF6 Sincerely, Dennis L. Ziemann,. Chief Operating Reactors Branch #2 Division of Operating Reactors
Enclosures:
Topics II-l.A II-1.B II-2.B
.cc w/enclosures:
DISTRIBUTION:
See next page Original:
J. G. Haynes cc:
J. H. DRAKE
- 0. J.
ORTEGA K.
P. BASKIN H. L. OTTOSON H. B. RAY EDM Files 1' A
!E' 6
0J 0
0
Southern California Edison Company 2 -
September 11, 1978 cc w/enclosures:
Rollin E. Woodbury, Vice President and General Counsel Southern California Edison Company Post Office Box 800 Rosenead, California 91770 David R. Pigott Samuel B. Casey Chickering-& Gregory Three Embarcadero Center Twenty-Third Floor San Francisco, California 94111 David W. Gilman Robert G. Lacy San Diego Gas & Electric Company P. 0. Box 1831 San Diego, California 92112 Mission Viejo Branch Library 24851 Chrisanta Drive Mission Viejo, California 92676
SAN ONOFRE UNIT 1 Topic II-1.A Exclusion Area Authority and Control The safety objective of this topic is to assure that appropriate exclusion area authority and control is maintained by the licensee.
The San Onofre Nuclear Generating Station is located on the Southern
-California coast about 62 miles southeast of Los Angeles and 51 miles northwest of San Diego. The exclusion area as well as the low popula tion zone and population center distance have been modified during the course of licensing proceedings on Unit 1 and Units 2 and 3 since Unit 1 received a construction permit in 1963. The original minimum exclusion distance for Unit 1 was 2 miles. This subsequently was re duced to 0.5 mile at the operating license stage and, as a result of an issue related to the.licensee's control of activities within the Station's exclusion area, it was further reduced to its present size.
The exclusion area for the Station is shown in Figure 1. It should be noted that the exclusion area for Unit 1 is the same exclusion area as for Units 2 and 3. The minimum exclusion area distance for Unit 1 is 283 meters measured from the edge of the Unit 1 containment building to the nearest point on the exclusion area boundary.
The San Onofre Station is located entirely within the boundaries of the U. S. Marine Corps Base, Camp Pendleton.
The exclusion area boundary is also the plant property line. The site is comprised of 83.63 acres of vwhich 11.7 acres are occupied by the Unit 1 power block. The licensee's authority to control all activities within the exclusion
-2 area was acquired in 1964 by grant of easement from the United States of America made by the Secretary of the Navy under the authority of Public Law 88-82.
The original grant of easement was amended on September 18, 1975, with the purpose of removing any ambiguities with respect to the licensee's authority to control activities within the exclusion area. All mineral rights in the land portion of the exclusion area are held by the United States Government.
The exclusion area is traversed by Interstate Highway 5, old U. S.
Highway 101, the Atchison, Topeka & Santa Fe Railroad, and improved walkway (the beach passageway) along the seawall on the ocean side of the Station, and by the Pacific Ocean. Arrangements have been made with agencies of the state and local governments to control the movement of people on the transportation routes through the exclusion area in the event of a plant emergency. These arrangements are documented in the Emergency Plan for the San Onofre Nuclear Generating Station and are applicable to all three nuclear units on the site. Chain link fences extending along and from both ends of the beach passageway in addition to surveillance by plant security personnel and by remotely monitored television cameras will be used to control the use of the passageway and the beach portion of the exclusion area.
We conclude that the licensee has the proper authority as required by 10 CFR Part 100 to determine all activities within the exclusion area
-3 and that appropriate and effective arrangements have been made to control traffic on the transportation routes and portions of the exclusion area accessible to the public in the event of an emergency. This completes the evaluation of this SEP topic. Since the plant design conforms to current licensing criteria, no additional SEP review is required.
SAN ONOFRE UNIT 1 Topic II-l.B Population Distribution The safety objective of this topic is to assure the appropriate definition of the Low Population Zone (LPZ) as required by 10 CFR Part 100.
Information on the population distribution in the region surrounding the San Onofre Nuclear Generating Station has been updated several times since the issuance of a construction permit for Unit 1 primarily as part of the licensee's application to construct and operate Units 2 and 3. The most current estimates of the population for the San Onofre site are contained in the Units 2 and 3 FSAR. Both the population center and low population zone distances have been revised during the course of the licensing proceedings.
Oceanside, California, some 17 miles southeast of the site was originally considered to be the closest community to the site which met the.defini tion of a population center in 10 CFR Part 100, i.e., a densely populated center containing more than about 25,000 residents. The original low population zone for Unit 1 was specified as extending to a radius of 4 miles. Subsequently, San Clemente (1969 estimated population of 18,000) was designated as the nearest population center based on pro jected population growth which indicated that San Clemente population would exceed 25,000 some time in the 1970's. The population of San Clemente was approximately 23,000 in 1976 and is currently estimated by the Chamber of Congress to be about 25,000. The distance from the Unit 1 reactor to the nearest corporate boundary of San Clemente is
-2 approXimately 2.5 miles.
The distance to the nearest residence within the city, that of former President Richard Nixon, is approximately 0.1 mile further. As the city of San Clemente is bordered on the south by Naval Reservation property, further residential development closer to the site is effectively precluded.
The low population zone for the site, which is the same for Units 1, 2 and 3, is specified in the Units 2 and 3 FSAR as having an outer boundary of 1.95 miles measured from the Unit 2 reactor. The distance to the outer boundary of the low population zone, measured from the Uni.t 1 reactor, is approximately 1.8 miles. The population center distance of 2.5 miles for Unit 1 is slightly greater than one and one-third times the low population distance of 1.8 miles and, therefore, is in conformance with the guidance given in 10 CFR Part 100.
The changes in the population distribution in the vicinity of the San Onofre Nuclear Power Station have been well documented as the result of the licensing activities on Units 2 and 3, and we conclude that the population center distance and low population zone for Unit 1 have been properly revised so that Unit 1 is currently in conformance with the distance requirements of 10 CFR Part'100. This completes the evaluation of this SEP topic. Since the plant design conforms to current licensing criteria, no additional SEP review is required.
SYSTEMATIC EVALUATION PROGRAM METEOROLOGY SAN ONOFRE UNIT 1 Topic II-2.B Onsite Meteorological Measurements Program The safety objective of this review is to assure adequate meteorological data to quantify potential offsite exposures from routine and accident releases of radioactive products.
The operational meteorological measurements program for Unit 1 consists of a 140 foot guyed tower located on the top of the coastal bluff approximately 330 feet west-northwest of the Unit 1 containment. Listed below are the permanent instrumentation and the heights of measurement on the tower.
MEASURED PARAMETER ELEVATION ABOVE GROUND (FEET)
Wind direction and speed 33, 131 Wind direction standard deviation 33 Dry bulb temperature 33 Vertical temperature gradient 33 to 131 The data are recorded on magnetic tape along with analog strip charts provided as backup. Al1 the recording equipment are located inside the Unit 1 control room. The recorders will provide a record of the meteoro logical conditions for any accidental releases as well as for routine releases during plant operation.
Calibrations of the system are performed on a quarterly basis. Additional information concerning calibrations, maintenance and data monitoring and analysis are provided in the.Units 2 and 3 FSAR.
-2 Southern California Edison has conducted a tracer test program at the San Onofre site. Among the objectives of the program were to evaluate the appropriateness of using data measured at the onsite meteorological tower for making dispersion estimates and to characterize dispersion representative of the meteorological'conditions during routine plant releases. Based on analyses of these test data and examination of the measurements system, which conforms to the position stated in Regulatory
-Guide 1.23 for system accuracies, the meteorological data collected at the onsite bluff tower provide adequate meteorological data for assess ments of meteorological conditions in the vicinity of the site for routine.and accidental releases.
Therefore, we conclude that the onsite meteorological measurements pro gram provides the licensee with adequate meteorological data to quantify offsite exposures from routine releases and to assess meteorological conditions during and following an accidental release. This completes the evaluation of this SEP topic.
Since the plant design conforms to current licensing criteria, no additional SEP rev.iew is required.
References:
Regulatory Guide 1.23, "Onsite Meteorological Programs", U. S. Nuclear Regulatory Commission, Washington, D. C.
San Onofre Nuclear Generating Station, Units 2 and 3, Final Safety Analysis Report, Docket Nos. 50-361 and 50-362, Section 2.3, Southern California Edison Company and San Diego Gas and Electric Company.
Standard Review Plan, "Onsite Meteorological Measurements Programs",
Section 2.3.3, U. S. Nuclear Regulatory Cormiission, Washington, D. C.
United States Nuclear Regulatory Commission, Draft Environmental Statement, San Onofre Nuclear Generating Station, Units 2 and 3, Docket Nos. 50-361 and 50-362, Section 2.6, Washington, D. C.