ML19329D984
| ML19329D984 | |
| Person / Time | |
|---|---|
| Site: | Rancho Seco |
| Issue date: | 10/31/1967 |
| From: | SACRAMENTO MUNICIPAL UTILITY DISTRICT |
| To: | |
| References | |
| NUDOCS 8004090491 | |
| Download: ML19329D984 (54) | |
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TABLE OF CONTENTS 2.
SITE AND ENVIRONMENT Section Page 2.1
SUMMARY
2.1-1 2.2 STTE AND ADJACENT ARFAS 2.2-1 2.2.1 SITE LOCATION 2.2-1 2.2.2 SITE OWNERSHIP 2.2-1 2.2.3 SITE ACTIVITIES 2.2-1 2.2.4 POPULATION 2.2-1 2.2.5 LAND USE 2.2-3 2.2.5.1 Current Land Use 2.2-3 2.2.5.2 Future Land Use 2.2-3 2.2.6 ACCESS AND EGRESS 2.2-3 2.2.7 MAKE-UP WATER SUPPLY 2.2-5 2.3 METEOROLOGY 2.3-1 2.
3.1 INTRODUCTION
2.3-1 2.3.2 DESCRIPTIVE METEOROLOGY 2.3-1 2.3.3 METEOROLOGICAL DATA 2.3-2 2.3.3.1 Meteoroloeical stability 2.3-2
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l 2.3.3.2 Dav-Night Inversion 2.3-3
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2.3.3.3 Winds 2.3-4 2.3.3.4 S torms and Tornadoes 2.3-4 2.3.3.5 Precipitation 2.3-4 2.3.3.6 Temperatures 2.3-4 2.3.3.7 Humidity 2.3-4 2.3.4 PROGRAM OF METEOROLOGICAL INVESTIGATION 2.3-5 2.3.5 PRELIMINARY ESTIMATES OF DIFFUSION 2.3-5 2.3.5.1 Short-Term Releases 2.3-5 2.3.5.2 24-Hour Release 2.3-6 2.3.5.3 Long-Term Releases 2.3-7 2.3.5.4 Rainout 2.3-8 2.4 HYDROLOGY 2.4-1 2.4.1 CHARACTERISTICS OF STREAMS AND LAKES IN VICINITY 2.4-1 2.4.2 TOPOGRAPHY 2.4-1 2.4.3 TERMINAL DISPOSAL OF STORM RUNOFF 2.4-1 2.4.4 HISTORICAL FLOODING 2.4-1 2.4.5 PREDICTION OF LAND URBANIZATION 2.4-1 2.4.6 GROUNDWATER 2.4-3 2.4.6.1 Groundwater and Wells 2.4-3 2.4.6.2 Occurrence and Movement 2.4-3 2.4.6.3 Water Supply 2.4-3 2.4.6.4 Ouality 2.4-3 2.5 GE0tocY 2.5-1
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Section Pace 2.6 SEISMOLOGY 2.6-1 2.7 SOILS 2.7-1 2.8 SITE ENVIRON > ENTAL RADIOACTIVITY PROGRAM 2,8-1 2.8.1 GENERAL 2.8-1 2.8.2 LAND ENVIRONMENT 2.G-1 2.8.2.1 Noble Cases Effect 2.8-1 2.8.2.2 Air Sampling Stations 2.8-1
- 2. 8. 2. 3 Iodine Detection 2.8-2 2.8.3 WATER ENVIRONMENT 2.8 2 2.8.4 SAMPLING 2.8-2
2.9 REFERENCES
2.9-1 LIST OF TABLES Table Number Title Pace 2.2-1 Projected Population Within 50-Mile Radius of Rancho Seco Site 2.2-2 2.2-2 Area and Population, California Counties, April 1960 and July 1965 2.2-4 2.3-1 Annual Summary. Meteorology of Sacramento and Stockton 2.3-2 2.3-2 Annual Summary Day and Night Stability Index Distribution 2.3-3 2.3-3 Rancho Seco Site Atmospheric Dispersion Factors 2.3-7 2.4-1 Rancho Seco Nuclear Station Data on Reservoirs and Lakes Within a 50-Mile Radius 2.4-2 2.8-1 Environmental Radiation Monitoring Progran 2.8-1 0
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LIST OF FIGURES Ficure Number Title 2.2-1 General Area Map 2.2-2 Site Location 2.2-3 Site Topography 2.2-4 Site Location - Aerial View 2.2-5 Population Distribution Estimate 1965 2.2-6 Population Distributien Estimate 1985 2.2-7 Current Land Use Within a 5-Mile Radius 2.2-8 Current Land Use - Fruits and Nuts and Field Crops 2.2-9 Current Land Use - Pasture Land and Range Land 2.2-10 Current Land Use - Dairy Cattle l
2.3-1 Stability Indices by Wind Directions and Average Speed (Sac rame nt o) 2.3-2 Stability Indices by Wind Directions and Average Speed (Sacramento) 2.3-3 Stability Indices by Wind Directions and Average Speed (Sacramento) 2.3-4 Stability Indices by Wind Directions and Average Speed (Stockton) 2.3-5 Stability Indices by Wind Directions and Average Speed (Stockton) 2.3-6 Stability Indices by Wind Directions and Average Speed (Stockton) 2.4-1 Streams and Lakes 2.4-2 Lines of Equal Elevation of Water in Wells 0148 U U l O e_
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SITE AND ENVIRONMENT 2.1 SIDNARY Data are presented in this section as a basis for the selection of design criteria for Rancho Seco Nuclear Generating Station Unit 1.
A series of studies (meteorology, population, hydrology, geology and seismology, land use, and earthquake design criteria) have been conducted.
The site is located approximately 26 miles north-northeast of Stockton and 25 miles southeast of the city of Sacramento in Sacramento County, State of California.
The exclusion area will have a radius cf approximately 2100 feet within a 2480 acre site. All acreage in this site, except the 320 acres in Sections 33 and 34, are currently owned by the District and negotiations are in progress for the procurement of this acreage. The nearest population of 25,000 or more is Lodi, located about 17 miles southwest of the site. The site area is almost exclusively agricultural and is presently used as grazing land. There are no dairy cattle within a five-mile radius of the site.
The climatology of the Rancho Seco site is typical of the Great Central Valley of California. Cloudless skies prevail during summer and much of the spring and fall seasons due to the Pacific Anticyclone lying off the O
California coast and preventing Pacific storms from entering the land.
The rainy seasen usually extends from December through March. The atmos-pheric dispersion factors for the site are considered favorable.
Make-up water for the plant cooling-towers and reservoir will be supplied i
by the Folsom South Canal. An alternate supply from Lake Natoma on the American River is available if the canal construction is delayed.
Ground water in the site area occurs under free or semi-confined conditions, I
le is stored chiefly in the alluvium, the older alluvial type deposits and the Mehrten formation. Ground water movement in the area is to the southwest with a slope of about ten feet per mile.
There is no indication of faulting beneath the site. The nearest fault system, the Foothill Fault System, is located about ten miles east of the site and has been inactive since the Jurassic Period, some 135 million years ago.. Ground accelerations of no greater than 0.1 g are anticipated to occur at the site during the life of the plant.
The soils at the Rancho Seco site are sufficiently strong to safely suptart the nuclear containment structure and appurtenant facilities. These soils can be categorized as hard to very hard silts and silty clays with dense
'to very dense sands and gravels, c
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2.2 SITE AND ADJACENT AREAS 2.2.1 SITE LOCATION The property --which will be wholly owned and controlled by the District, herein called the site -- is located in the southeast part of Sacramento County, State of California and lies either wholly or partly in Sections 27, 28, 29, 32, 33 and 34 of Township 6 North, Range 8E.
All parts of the site, except the 320 acres in Sections 33 and 34 are currently owned by the District and negotiations are in progress for the procurement of this property.
The site is approximately 26 miles north-northeast of Stockton and 25 miles southeast of Sacramento as shown in Figure 2.2-1.
The nuclear reactor unit will lie wholly in Section 29 as shown in Figure 2.2-2.
The site region is located between the Sierra Nevada to the east and the Coast Range along the Pacific Ocean to the west, in an area of flat to lightly rolling terrain at an elevation of approximately 200 feet >GL.
To the east of the site the land becomes more rolling, rising to an elevation of 600 feet at a distance of about seven miles and increases in elevation thereafter approaching the Sierra Nevada foothills.
The topographic features of the Sacramento and San Joaquin Valley are shown in Figure 2.2-3.
Figure 2.2-4 is an aerial view of the plant site.
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i 2.2.2 SITE 0'iNERSHIP The site, totaling 2480 acres, will be wholly owned and controlled by the District. All acreage, except the 320 acres in Sections 33 and 34 are cur-rently owned by the District and negotiations are in progress for the pro-curement of this property.
Access for transmission lines and water lines will be from the west side of the property. For purposes of this application, an exclusion radius of 2100 feet has been established, the area of which lies completely inside the boundary of the property described above.
(See Figure 2.2-2) 2.2.3 SITE ACTIVITIES At the present time the land is undeveloped.
It is used solely for grazin2 beef cattle.
2.2.4 POPULATION A population study was conducted for the Rancho Seco site.
Its objec t was to determine the population distribution for the area within a 50-mile radius of the plant site for the years of 1965, 1985 and 2000.
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Site and Adjacent Arcas The population projections for 1965 and 1985 were derived from census divisions of the US Census of Population and Housing, 1960, and estimates of future growth supplied to SMUD by the planning commissions of the counties lying within the 50-mile radius, census divisions (with their further breakdown into census tracts, and then into enumeration districts) were related to 22.5 sector areas by use of a 15-minute geological survey map.
Only two of the fifteen counties involved could provide pop,ulation projections for the year 2000. However, the Department of Finance, State of California, also has published a population projection for the counties through the year of 1985 and has provided the District with an unofficial population projection for the year 2000. This information, along with the projections received from the counties, has been tabulated on Table 2.2-1.
A review of the table shows that the Department of Finance's projections for the year 2000 are, in general, icwer than the counties' projections for 1985.
When this was discussed with the Department of Finance SSUD was informed that the county figures are normally significantly higher than the State's projections. The county projections have been used to assure the most conservative design and maximum safety.
TABLE 2.2-1 PROJECTED POPULATION WITHIN 50-MILE PADIUS OF RANCHO SECO SITE 1965 1985 2000 County a
County *l State Countyi State Co un t y * *+
States Alameda 200 200 300 300 400 Amador 12,300 11,600 19,900 18,200 23,600 Calveras 11,800 11,500 43,000 16,100 19,600 Contra Costa 62,000 62,000 192,900 16S,900 242,000 El Dorado 26,200 25,900 66,600 47,100 69,800 Nevada 400 300 800 400 500 Placer 61,500 60,700 152,500 113,100 157,600 Sacramento 647,400 611,900 1,501,900 952,500 1,259.500 San Joaquin 272,700 273,300 465,800 355,900 421,500 solano 58,800 58,800 113,600 104,400 147,600 Stanislaus 95,100 95,000 142,800 128,000 154,100 Sutter 3,400 3,500 4,900 5,000 6,400 Tuolumne 10,400 10,200 26,300 24,100 31,900 Yolo 84,600 75,100 201,800 120,600 161,000 Yuba 2,000 1,900 2,500 2,100 2,800 TOTALS 1,348,800 1,301,900 2,935,600 2,056,700 2,593,90n
- Plant design calculations based on these population projections.
- Unofficial population projection by Department of Finance, State of California.
- Not availabic.
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Site and Adjacent Areas
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The population distribution estimates for 1965 and 1985 are shown on
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Figures 2.2-5 and 2.2-6 respectively. The most populated quadrant within five miles of the site in the 1965 distribution is southwest of the site.
This distribution is also projected for 1985. The nearest population center of 25,000 or more is Lodi, located 17 miles south-southwest of the site. Other population centers of 25,000 or more within a 50-mile radius include Sacramento at 25 miles, Stockton at 26 miles, and Modesto at 50 miles.
The part-time population within the 0-5 mile radius is not considered to be significant with respect to the overall population. Recreational use or tourist attractions in the specific area are virtually non-existent.
Appendix 2-B includes a copy of a Department of Finance publication defining the projection techniques used in their projections.
2.2.5 LAND USE 2.2.5.1 Current Land Use The site area is almost exclusively agricultural (See Appendix 2-B).
Figure 2.2-7 provides a detailed description of all agriculture and resi-dential activities within a 5-mile radius of the site.
It should be noted that there are no dairy cattle within this 5-mile radius.
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The agricultural activities in the counties lying within the 50-mile radius are shown on Figures 2.2-8 and 2.2-9 and 2.2-10.
The numbers given on the figures represent the total county activity. Table 2.2-2 provides the total area of the counties.
2.2.5.2 Future Land Use Ac t iv itie s in the area immediately surrounding the site are not expected to change extensively. Proposed land use for the southeast section of Sacramento County as adopted by the Sacramento Planning Department is presented in Appendix 2B.
2.2.6 ACCESS AND EGRESS Currently, as shown in Figure 2.2-1, State Route 104 runs just north of the site in a general east-west direction and connects with US Route 50 and 99 to the west and State Route 49 to the east.
As is shown in Appendix 2B, Southeast Area plan, the proposed road net will greatly increase the aircady adequate access and egress to the proposed site.
Pail access to the site will be made available by running a rail spur fren the existing Southern Pacific Railroad line that runs roughly-parallel to f3
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Site and Adjacent Areas TABLE 2.2-2 ARE/s AND POPULATION, CALIFORNIA COUNTIES, APRIL 1960 AND JULY 1965 Land area
- April 1900*
July 1955 *
- in County square t.ile s Popula: ion Dersity Populatien Density Alameda 733 908,109 1239.0 1,033,100 14C9.4 Alpine 723 397 0.5 400 0.6 Arador 593 9,990 16.8 10,600 18.2 be t e 1,663 82,030 49.3 95,300 59.1 Calaveras 1,C27 10,259 10.0 11.E00 11.5 Cclusa 1,153 12,075 10.5 12,600 10.9 Contra Ces:a 734 409,030 557.3 509,900 694.7 Del ::erte 1,003 17,771 17.7 18,300 18.2 El D;rado 1,714 29,390 17.1 40,500 23.6 Fres1:
5,964 365,945 61.4 408,400 08.5 CIcna 1,317 17,245 13.1 18,900 14.4 lid sid:
3,573 104,892 29.4 106,300 29.8 1 ; er 121 4,254 72,105 16.8 79,500 18.6 Inyo 10,091 11,684 1.2 14,100 1.4 Kern 8,152 291,984 35.8 329,400 40.4 Kings 1,395 49,954 35.8 67,000 4S.O Lake 1,756 13,7S6 11.0 17,200 13.7 Lassen 4,547 13,597 3.0 15,600 3.4 Los Angeles 4,060 6,039,771 1457.4 6,878,200 1694.1 tbdera 2,144 40,46S 18.9 44,300 20.7 Parin 520 146,820 282.3 188,700 362.9
.%riposa 1,455 5,064 3.5 6,000 4.1 t:e ndo c ino 3,507 51,059 14.6 51,200 14.6 Merced 1,982 90,446 45.6 107,200 34.1 tudoc 4,092 8,30S 2.0 8,000 2.0 Meno 3,02E 2,213 0.7 2,700 0.9 tuntercy 3,32e 19S,351 59.7 221,300 66.6 tapa 753 65,S90 86.9 75,700 99.9 hevada 976 20,911 21.4 25,100 25.7 Oranpe 7E2 703,925 900.2 1,157,900 14E0.7 Placer 1,424 56,993 40.0 72,500 50.9 Plu=as 2,570 11,620 4.5 12,'00 4.8 Riverside 7,177 306,191 42.7 415,400 57.9 Sar.rauento 953 502,778 511.5 617,200 627.9 San Senito 1,396 15,396 11.0 17,200 12.3 San Bernardino 20,131 503,591 25.0 637,500 31.7 San Diego 4,255 1,033,011 242.8 1,200,E00 282.2 San Francis:o 45 740,316 16451.5 750,500 16677.5 San Joaquin 1,409 249,989 177.4 273,800 194.3 San Luis Obispo 3,316 81,044 24.4 100,600 30.3 San.~.atec 454 444,357 978.8 532,200 1172.2 Santa Barbara 2,738 168,962 61.7 243,100 8S.8 Santa Clara 1,302 642,315 493.3 891,2C0 654.5 Santa Cruz 439 84,219 191.8 103,800 236.4 Sharta 3,793 59,46S 15.7 74,700 19.7 Sierra 953 2,247 2.3 2,400 2.5 Siskiyau 6,312 32,8S5 5.2 34,300 5.4 Solano 827 134,597 162.8 159,900 193.3 Sanema 1,579 145,375 93.3 178,400 113.0 Stanislaus 1,500 157,294 104.9 176,100 117.4 Sut t c.r 607 33,320 55.0 39,000 64.3 Teha aa 2,976 25,305 8.5 25,300 S5 Irinity 3,191 9,706 3.0 8,800 2.6 Tulare 4,538 168,403 34.5 167,300 33.7 Iuolumne 2,274 14,404 6.3 16,600 7.3 Vent ur a 1,S51 199,133 107.6 302,900 163.6 Yolo 1,034 65,727 63.6 79,000 76.4 Yuba 637 33,859 53.2 41,200 65.6 ihe Sta:e 156,573 15,717,20' 100.4 18,756,000 119.8
- U. S. Durcau of the Census, Census of Population: 1960, P (1)-6A, able 6.
- Provisicnal poplation esticates prepared by State Department of Finance.
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i Site and Adjacent Areas State Route 104 adjacent to the site.
Proposed routing of the rail spur is shown in the site plan, Figure 2.2-2.
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2.2.7 MAKE-UP WATER Sl'PPLY The District will obtain the make-up water for its plant from the Folsom South Canal, which is a feature of the Central Valley Project. The canal is to be constructed by the Bureau of Reclamation. A pipeline and pumping station will be constructed between the plant and the Folsom-South Canal.
In the event the Folsom-South Canal is not completed in time t o :re c t the District's requirements, the District will install a pipeline and pumping station between the plant and Lake Natoma on the American River. The I
District's agreement with the Bureau of Reclamation covers both arrange-ments.
Preliminary design work on both plans is in process.
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FIGURE 2.2-4 SITE LOCATION AERIAL VIEW
^n1 7a UUi/
~
@~ s g ono SACRAMENTO MUNICIPAL UTILITY DISTRICT 5
J
)
19654 l
0-5 Miles
( ): TOTAL POPUL ATION FROM O-5 mites N
(O)
(4)
(O)
O O
4 4 mii, f
(8)
(7) l 0
-fO O
(40g 7
0 3 mii.
f
'/
(O) 2 mi I7
' 4 O
Of O
O 0
0 7
O Imil O
O O
(126,299) 8 N
O
- d. '
E 22 W (51) 21 4
18 4
4 D
O O
O O
(O)
/,g
?N s~
p Q
/
21 N
I8 O
O N
O\\
/
O O
4 w
47,3 O
k
/
(0)
(58,039) gh (SO)
O O
O V###"I
O o
5 0
4 0
/
\\
(5)
(29) 4 0
4s 5
N (8)
(0)
( 5)
S (3.
RADIUS IN MILES O-l 0 -2 0-3 0-4 0-5 0-10 0-20 0-30 0-40 0-50 ACCUMULATIVE TOTAL 12 37 10 2 11 7 17 4 4,060 103,271 908,115 1,051,877 1,348,5E Y
SOURCE U.S. Censuses of population 1960, and pop ula tion projections f urnished by County Planning Commissions py g39 e
5
L I
1965 5 -50 Miles
( ): TOTAL POPU L A TION FROM l
i N
0-50 MILES (IN SECTOR)
(58,904) 50 mile
{
(197,807)
(15,921) 13,433 5,411 40 mile 2,376
,277)
I ubven s
( 7,691) p 19,317 10,427 8,344
\\
13,178
\\
g,
' Rosevihe q*
Plocerville
\\
9,540 25,597 4,185
, od/ond
\\,
20 mile Sacrom,onto\\
\\
368 811 (4,406)
N l,805
/
\\
,887 22,392 N,
\\
\\478
/
/
N'j,y, 4g%
Y
' ! 6,51 6 392 /
f p
/
585 g, yj, 70,983
'd8,28$\\
,/ 360 Jomi.
I,406 N. g 98'
- }8
'8 rov,, &" #
o 5<
2,13 5 /
4
.',*.) *.,\\@ /
3 Jockson 2 20,**;..l;,.,,:.*.*
1100 5,OlOg^p 4,635 3,767 I,995 2,305 1,035 tiOS
( 10,055 ) E te
/
sf '!.: C.
- 3' N 4
Golt
'f 4,9 2 4 $ $ $ s/g x 5 0 56i Son xng,;y 0
/
/ l0,289 '/todi /
3'950 N
775 2,59'3 5,316
,jp 4,527 I 911 i
6 1,533 2,229 200 16l,997 !'
(15'181)
S0"0'8
'Pi//r
/
499 sN f
'g S'*'.%
k !**
l 4,179 200
/
/
/'
l j
j 15,503 19,380
/
1'652 3,320
/
21,479 s,604)
/
p'y,,f,,,
g[o,4gof, (4,520) l 22,769,
4'77,,,
77,630 23,290 (219,973)
"od#
4*&'
(25,786) l8 (105,690) s FIGURE 2.2-5 POPULATION DISTRIBUTION ESTIMATE - 1965 q n 17 C 0.i.@
g (-'=.,gg ii g
I SACRAMENTO MUNICIPAL UTILITY DISTRICT
7 g
1985 O-5 Miles y
( ): TOTAL PO PUL ATION FROM O-5 MILE (4)
(8)
(4)
O 8
4 mii, O
(14 )
II4 )
O 10
\\
O O
O 3 mite (776 O
k O
2 i
/
(4)
(14 )
\\
O d
I
/
7
/
O 4
\\
O \\,
O[O [
O
/
10 O
/
O
'\\
x \\
(335,718) wc O
x 0
/
O N
g 54 W (95) 45 10 30 5
0 0
0 O
(4)
O 8
O 32 0 '/
\\O 10 7
O O\\
'/
O O
O O
w 4 9,25 f
10 75 (13 2)
/
/
(4)
(85,093) p l
0 o
o N
O 8
20 0
s O
O
\\
p
\\
(8)
(95)
/
12
/
4 8
(12 )
(4)
(149,461)
(
(8) 5 S
( 10 @
)
i l
R ADIUS IN MILES 0-I 0-2 0-3 0-4 0 - 5 lO-IO 0 - 20 0 - 30 0 -40 0- 50 l
ACCUMULATIVE TOTAL 32 117 261 295 4 2 4 l 7,1 I I 268,685 1,972,326 2,360,302 2,9 3 5,8 47 l SOURCE U. S Censuses of population 1960, and pop ula tion projections f urnis hed by Count y Pla nni n g Co mmissions 03.63 y
nn177 vui e
4
i 1985 e
5 -50 Miles S
N
( ): TOTAL POPUL ATION FROM O-50 MIL ES (IN SECTOR) so ma.
(565,436)
(41,059) 28,620 9,I53 40 mile 6,205
,688)
A"h" j#
/
(17,236) 50,154 18,9 91 34,040 j 22'765 3o ma, 3,635 l
pasevitie s'*
Placerville j' f
- 4%
39,098 97,364 11,550,', '
10,204 og/ong 491,667 g,,
634,021
\\acromsoro
/ 2,605
/
S
- 794 325 65,"&
749
$;f 5,395 O 251 500
/
775 L
p,j, 171,043 8 3,984~
585 Jerb(.. m $. % "
,oc*...
\\
250 I
19,290 6,328 9,640 450 **.N-l.
ll800 7,985 ggq 6,072 3,883 1,642 (21,386) E no *.
o sN s
I' oneo D f
7,957 o
6' 4,311 N
17,724 odi 2,817 10,197 19,830 16,202
.,6 61 1,828 2,998 763 Sonora (47,274)
//Sh9 27,619 Sto A on 6,028 747
/
s
/
/
%f i
61,888
! 32,900 2,307 8,450 4 2,413 I
Y (Q*WI
,79I) ff,?yy,,,,,,
41,6 81 y
g ookvo/o l19 997 34,913 Tracy n
(375,153)
- 8#8 84-(38,401) e (171,669) l i
S
.I FIGURE 2.2-6 POPULATION DISTRIBUTION ESTIMATE - 1985 l
a p p 1' 7 m i
hSMUD vu i e u 0*
SACRAMENTO MUNICIPAL UT:LITY DISTRICT
{
(
t
/
N e
b
__n g$'
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l
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ll N
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l l
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e I:
l l
l I
e i
l
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al "I
Il l
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!l__
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e F-l fg F d hcuo
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e
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x1-
- w_
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D,,,
is 4
e se e T
- s :
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~
l
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1 s
'~~U~s 0
!! O!g l
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oo L
l e
i I
l I
r\\ oI
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7 2
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l L
x.-,,..... 2 I
4 o
l t
i N
z l
/
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l s
i i
- y - - - - - - - - -
2 L" - %
-4>- - 2 *?- - - - - - - - -,
7 e
1 I
Jf J
l l
!loiss 87 i
l Aw
.I c.. s a
__p_.messe____ e____q
,nz :
h,s
_n n 9 7n _
scats am e
VUi//
f s
P
\\
%(
N l
8" k
I i:!
0:0 LEGEND P
A 1 HOUSE E,
B BARN (S)
C 1 HOUSE & 1 BARN
!llI D
1 HOUSE & BARN (S) y f,
- E FEED LOT j:/
F HORSE PADDOCK I
G FEED MILL I
H IRRIGATED PASTURE I
y h
0 I
T0 MAT 0ES w
e d
3 e
J T0 MAT 0ES, BEANS, 3
3 3
& VARIOUS CROPS Ie"'"
m K
ALFALFA I
L CLOVER SEED l
M OATS N
BEANS HEADS OF BEEF e
i TOWN OF CLAY (7 HOUSES)
/
ALL ACREAGE IS WITHIN THE 5-MILE t
[
/\\
(0
' y/l sf p@ p / <,
l Q._.dg5 :- E5"
-.h,
/
./.j s'f
, /f. *I*
/~
FIGURE 2,2-7 qd*h CURRENT LAND USE WITHIN A 5-MILE RADTUS
[
01 %
$SMUD i
SACRAMENTO MUNICIPAL UTILITY D I
nn,nn wviVU b
i M
r a
c c
l 3
'., Sutter Co. *.
I Nevada Co.
35.i N
N
- ..e 87.6 j
o4
.f 2 6 0.7 67.7 i Yuba Co. I 00 i Pla cer C o.
g..
l s..........
.f**...
I 6.6
. ~ ~
l l
.....................:s
i f 45.9 g
Yolo Co.
I...
.i lE
)%
4.7 s
- ..a \\.......).....f..E
% es O.0
+,<(S g.
C E'l Dor ado C o.
)
26.2
- D Es
\\
j l I. 5 ' 2o.
- /;
514.3 i
238.7 N
i.
~ '.... Y *:
/
\\....~'Y.........~
s.,
\\.,...,
'7
- ... Socramento Co.
- 7.71 i
j
/
'., Solano Co. i l
I A m a dor C o. e.';
/
[
l
'9 e'
'RANChlOi.]/
25.7 I.7 O
f I66.1
/
Calaveras Co.
l
/'./" I' I54.7
./
j '**.
I.
749.I
- \\.'
35.0 Contra 294.I
/
Costa l'uolumne i
% Co.
'i I
f,
,,..... "...... '* *i.
n.o San.Io aquin Co.
i
., O. i A lame da Co.
i.
/
'. ': ~.
s t
..'....***.v*..'..
/
62.9 8
7.4
/
265.4 5 I.O
./
i
/
Ston t slaus Co.
%g,..,,,,,
P Scole in miles 10 Q
10 20 30 40 50
~---
FIGURE 2.2-8 CURRENT LAND USE - FRUITS Fr uit s 8 Nuts Sq mi of AND NUTS AND FIELD CROPS Fi eld Crops s; O f
.w 6s SOURCE: Annual Agricultural Crop Reports Cali f o r n i o State Department of A g ric ult u ral SACRAMENTO MUNIC; PAL UTIUTY DISTRICT l l
l l
4
-M
i i
.a
- ./
- Sutter Co. '.
- Nevada Co.
\\
/
46.i
.J 15o.. 3 11.5 e
51.6
,I Yuba Co. I 2'B'8 i
Pla c er C o.
82 8.1
- l-l
\\.
.e,,;..........:
....... ~..
- .......,n.,..*l
/ *. *.. " t..
/.
37.5
- 't" gj
....................s..,
75.O j'**
~
Yolo Co.
8.t v 2
o
[,f ^ Jo 4f, Es 78i.3
+,
4
..s.~....................:.
s El Dorado Co.\\
II5.6
.ii
):',
312.5 O
12 6.1 Af/( (-
'.......'*N...,* * ~ ~ ~........ ' * * " *..
t S
257.8
\\
.i
/
,"":~'""***..
1 " .. '
I i
Sacramento 'Co.
- 3* 3
./
i.
- f 3o6.3 t
e Solano Co. i l
I Amador Co./
/
"i..-
(R AN Cl g
f.,e * **...,..... S E C D;i Oi(c,;
~""
47 r'
. -.. ~.
54.7
.~
,'...., **~
679-7 i
239.8
,o j
~
'. /Cala vera s Cc1 t
- .......;/~~;/
256.4 f.
+
7,.
- *.,,,_./
226.6 3,9 510.2.
Contro
- i4.4 i
1 J:
s 289.1 Costa i.
Tuolumn e 1
Co.
i C o.
'~.......
Son Joaquin Co.
l 4...:
.*'g,..o*,....
- f. "",.. :
g g
A lameda Co.
i.
./
~~,:
i
/
216.4 4.4 i
/
651.6
~
39
'6
~.
' ':./
Stanislaus Co.
.,,,,,.*.,pf....................,.
- 2. :.
0168 Scale in miles 10 O
10 20 30 4 0, 50 t
=
FIGURE 2.2-9 CURRENT LAND USE Posture Land Sq. mi. of PASTURE LAND AND RANcr7 LAND Ronge Land SSjU,-
on.n=
SOURCE: Annual Agricultural Crop Reports g g g g c' i
California State Depor trnent of u
Agric ul1u r01 SACRAMENTO MUNICIPAL UIiUTY DISTRICT
i f
I
~.
v;
- , Sutter Co..*s
..' ".r..*
e
- Nevada Co.
s r*
3,300 C
300 2.500 l Yuba Co. j Pla cer Co.
j'"
/... Y
. (......% *.
,e
..\\*'. -
......................:g 2,NO
,Y
?*..,
l Yo/o Co.
g9o s c,*
' n \\......\\.... W............'e
%s us'N E'l Dorodo Co.
I'200
?
-(
"I..,
[
- 0 4
/qS g
I9.2OO So cramento -Co..
...*h!.......,'* =....... = " * *... ~. -
./*
/*....-...,.
s 300 Solano Co. I I
I
\\ Am ador Co. /
e)
I"
/
\\
4,9 g n R A N C,H O(
}
,.....,,,,... S E C O
- g,,..,... *,,..
/
i00 f
so
/
l Coloveros Co.
s.,.c *......v..:.....==
s=s
- f 5 2,4 O O t
i f'
200 Contro
=
Costa 3'700
/*
/
i Tuo)/umne Co.
i M.
9.s.....'
- ... *i San Joaquin Co.
t Co.
N
.,.:.......=.......
'e A/omeda Co.
'#,s t,300
- r 75,OOO Stanislaus Co.
.t..............-.. j.'
s.
Nr-(
Mo doiry ccetfle
%nthin o 53 mile Scale in miles
+*
10 O
10 20 30 40 50, r o diu s i
'!GURE 2.2-10 Doiry cattle 2 yrs. 8 over CURRENT LAND USC -
DAIRY CATTLE 0169 S O URCE : California State ()e po r t ment Division of Crop Reporting SACRAMENTO MUNICIPAL UTILITY CDiSTRICT 2!
a-4,.
a
-A-1
- s i
b-2.3 METEOROLOGY 2.
3.1 INTRODUCTION
r s
An evaluation of the meteorology of the site and of the adjacent areas is mandatory in order to determine the atmospheric dispersion character-istics in the general area of the-proposed plant. These characteristics i
are important in the determination of environmental consequences from
]
potential gaseous radioactivity releases, i
An extensive on-site meteorological investigation was initiated in the j
summer of.1967 by District's consultant, Meteorology Research, Inc. This investigation included on-site data collection and compilation of the available meteorological data adjacent to the site.
Furthermore, the program of a permanent meteorological data collection station to be installed is described. The report and subsequent supplemental informa-2 tion from Meteorology Research, Inc. is included as Appendix 2A.
2.3.2 DESCRIPTIVE METEOROLOGY l
The climatology of the Rancho Seco site is typical of the Great Central Valley of California. Cloudless skies prevati during summer and much of the spring and fall seasons due to the Pacific Anticyclone lying off the California coast and preventing Pac.fic-storms from entering the land.
p The rainy season usually extends from December through March. Approxi-( j mately two-thirds of the yearly rainfall occurs during this period of the year.
The most important controlling geographical influence on the meteorology of the. site as its location in the Valley surrounded by m'untains to the o
west, north, and east. The mountains have a moderating effect on the storms moving from the north and northwest during wintertime, collecting much of the precipitation. The rains in the Valley are usually accompanied i
by south te southeast winds. During the dry season, marine air enters the Valley along the San Joaquin-Sacramento River flowing at first in the easterly direction and then splitting into a southerly flow into the l
Sacramento Valley.and northerly flow into the San Joaquin Valley. The divergence ' zone is located between Sacramento and Stockton and has a very marked effect on the site. The divergence zone is usually centered to the north of the site during daytime and to the south during nighttime.
When the divergence zone is located north of the Rancho Seco Site, the i
site and_ areas'to the' south of it, including Stockton, have the same meteorological conditions. When the divergence zone moves to the south of the site, the site and areas north of the site assume the same meteor-ological pattern. Consequently, the site climatology is more nearly related to Stockton during daytime and to Sacramento at night. Hourly recorded meteorological data are available for seven and six year periods
'for the Sacramento and Stockton areas, respectively.
- O oivo
.wn n 3 o i Amendment 2 2.3-1 VV'V '
l
Meteorology 2.3.3 METEOR 01DGICAL DATA The analyzed on-site data for a period of 8 months f alls between the hourly-2 recorded data for Sacramento and Stockton as can be noted in Figures 23 and 24 of Appendix 2A.
Therefore, the two sets of existing long-term data are used for the purpose of this report. Continuous data collection on site will be reported to confirm this conclusion. The available data was machine-reduced to obtain yearly averages of Pasquill meteorological stability indices distribution for 16 wind directions, including calms; and to determine average wind speeds for each stability class and compass direction. A summary of the reduced data for the two locations is shown in Table 2.3-1.
Figure 2.3-1 through 2.3-6 illustrate wind frequencies and speeds as a function of 16 com-pass directions and 10 stability classes at these two loca t io n s.
TABLE 2.3-1 ANNUAL SDDIARY - METEOROLOGY OF SACPAMENTO AND STOCKTON STABILITY CLASSES A
A-B B
B-C C
C-D D
E F
G Treauency of Occurrence.
- Sacramento
<1 5.3 8.3 4.5 5.3 1.6 33.6 17.3 12.7 10.6 Stockton
<1 4.7 9.5 7.2 5.9 1.4 21.5 10.8 12.8 25.5 Mean Wind Speed m/sec.
Sacramento 1.3 1.5 2.1 4.3 3.2 5.6 5.7 4.3 2.5 1.2 Stockton 1.4 1.5 2.2 4.3 2.9 5.3 3.5 4.2 2.4 0.9 2.3.3.1 Meteorological Stability Computed yearly avarages for Sacramento and Stockton indicate that the neutral meteorology conditions (Class D) and stable conditions (Classes E, F and G) exist at Sacramento approximately 34 and 41 percent of the time, respectively. Neutral and stable conditions at Stockton exist approximately 22 and 49 percent of the time, respectively. Unstable con-ditions (Classes A, B and C) exist at Sacramento and Stockton, approximately 25 and 29 percent of the time, respectively. The extremely unstable condi-tion (Class A) occurs at both 1c 'ations less than 1 percent of the time.
n ss fna qy.VJ 0171 2.3-2 Amendment 2
Meteorology
. ~ (,,,)
With.the excepti n of stability Class D, average wind velocities associated with the various stability conditions are quite similar at both locations (Table 2.3-1)..Under neutral conditions the average wind speed is 5.7 meters per second at Sacramento and 3.5 meters per second at Stockton.
Under extremely stable meteorological conditions (Class G) the average wind speeds at these two locations are 1.2 and 0.9 meters per second, respectively.
Yearly averag of hourly statistics of meteorological data from Sacra-mento and Stecston indicate that neutral conditions may exist at the site at any time of the day and night. Stable conditions occur only at night I
and unstable conditions only during daylight hours, as indicated in 1
Tabic 2.3-2.
t' TABLE 2.3-2 ANNUAL
SUMMARY
- DAY AND NIGHT STABILITY INDEX DISTRIBUTION STABILITY CLASSES i
A A-B B
B-C C
C-D D
E F
G DAY (09, 12, k.
15 hrs)-
I sacramento 0.58 5.31 8.49 4.51 5.31 1.42 11.72 0.0 0.0 0.0 Stockton 0.61 4.77 9.45 7.12 5.94 1.58
-8.20 0.0 0.0 0.0 l
l NIGHT (18, 21, 00, 03, 06 hrs) 1 Sacramento 0.0 0.0 0.0 0.0 0.0 0.0 21.85 17.32 12.73 10.59 Stockton 0.0 0.0 0.0 0.0 0.0 0.0 13.30 10.83 12.81 25.56 2.3.3.2 Day-Night Inversion j
Night inversion conditions' occur in California at or near ground 1. vel and are-predominantly. associated with stable meteorological conditiens. Day inversion may occur at various altitudes but is usually associated with unstable or neutral meteorological conditions existing between the inver--
sion layer and the ground.
01.?2 g
2.3-3
,w
--r;
,,-w__
,_7-_m
-.. ~
y,,..,m r-..-
y y.y--,y.,--,.r-T
'7
'r-r-"*
9+~' " "
Meteorology 2.3.3.3 Winds Wind extremes noted for the Sacramento area reached 70 miles per hour (one minute average) during winter months 1952 and 1953.
In 1965 the highest wind speed at Sacramento was 42 miles per hour from the northwest and 44 miles per hour from the south-southeast at Stockton.
In 1966 the high for Sacramento was 36 miles per hour from the southwest and 39 miles per hour from the north at Stockton. While these highs occurred at different days and from somewhat different directions, the overall speed is in general agreement. Similar values would be expected at Rancho Seco.
2.3.3.4 Storms and Tornadoes Severe storms occur in the Valley infrequently. According to the US Weather Bureau, storms in the tornado class occurred in California 22 times between 1953 and 1962. Thunderstorms are more common and in the Rancho Seco area occur three to five times per year.
2.3.3.5 Precinitation Rainfall in California is brought by storms entering the state from the Pacific Ocean. The maximum 24-hour precipitation recorded in 18 years in the Sacramento area and 25 years in Stockton was 5.59 and 3.01 inches, respectively. The normal yearly precipitation for the Sacramento and Stockton areas is 16.3 and 13.4 inches, respectively. The precipitation intensity recorded in the Sacramento area over a 5-year period was 0.10-0.24 inches per hour less than 15 percent of the time and 0.01-0.09 inches per hour more than 84 percent of the time.
2.3.3.6 Temperatures Temperature extremes reach 115 F in Sacramento and 113 F in Stockton during June-July. Minimum temperatures fall below the freezing point during winter months.
Recorded extremes were 19 F in January 1966 at Stockton and 23 F in Sacramento. Average daily temperature fluctuations in July were 57.4 to 93.4 F in Sacramento and 60.9 to 95.4 F in Stockton. Daily average temperature fluctuations during the coldest month of the year (January) were 37.2 to 53.2 F in Sacramento and 37.0 to 52.4 F in Stockton.
Similar temperatures are expected to occur at the Rancho Seco site.
2.3.3.7 Humidity The average minimum relative humidity recorded at the Rancho Seco Site was 40.6 percent compared to 41.9 percent at Sacramento. Humidity recorded at Stockton varied by approximately 10 percent with the humidity recorded at Sacramento. Consequently, humidity at the site is expected to fall within the same margin.
O
~'
0' ~' #G'
^ ' ' " "~~~~
'uu4 di J
2.3-4
, ~y Meteorology
(
)
2.3.4 PROGRAM OF METEOROLOGICAL INVESTIGATION In order to obtain meteorological data at Rancho Seco for plant design and operating purposes, a data collection network was started at the site in April 1967. The on-site collection system consists of meteorological instruments mounted on a 53-foot pole to be replaced by a permanent tower near the plant location.
In addition, it is planned to have the on-site data collection system supplemented by measurements at other locations.
The on-site data collection program included recording of the following parameters:
a.
Horizontal fluctuations of the wind b.
Vertical lapse rate c.
Wind speed d.
Wind direction e.
Temperature f.
Humidity l
)
2.3.5 PRELIMINARY ESTIMATES OF DIFFUSION Na The meteorological conditions for 2-hour, 24-hour and 30-day releases were determined applying computer reduced data from both Sacramento and Stockton A summary of the yearly averages appears in Appendix 2A.
The areas.
l3 meteorological parameters considered in this determination were the per-sistences of the individual Pasquill stability classes and associated wind speeds, directions, and wind persistences in any single direction.
2.3.5.1 Short-Term Releases Atmospheric dispersion for ground-level releases not exceeding a few hours duration were calculated using the standard Pasquill diffusion formula:
1 XlQ =
(1) 77 U
u y
z The above formula was corrected for the dilution effect in the " wake" of the building by calculating the virtual point source distance from Equation (2) below:
" T #y "z
(2) 7s
(
i 0174
-n.-s "uVlVV Amendment 2 2.3-5
Meteorolocy where gy,c are the Pasquill dispersion parameters in the Y and Z direc-tions,'respectively; A is the minimum cross sectional area of the building; and 6 is the mean wind speed.
The 2-hour release time assumes moderately stable meteorological conditions (Class F) with a unidirectional wind flow of 2.0 m/sec., recommended by n
~
Smith and Beesmer.
2.3.5.2 24-Hour Release Atmospheric dispersion for a one-day release takes into consideration that in the Sacramento-Stockton area stable conditions occur only at nicht (15 hours1.736111e-4 days <br />0.00417 hours <br />2.480159e-5 weeks <br />5.7075e-6 months <br />) and unstable conditions exist only during the daylight hours (9 hours1.041667e-4 days <br />0.0025 hours <br />1.488095e-5 weeks <br />3.4245e-6 months <br />). All unstable conditions were classified as Class C; all stable conditions were classified as Class F, with associated wind velocitics for 2l these two classes of 2.9 and 2.0 m/sec., respectively.
To increase the conservatism of the one-day dispersion model, the assump-tion was made that the wind will blow continuously in one direction for 24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br />. The probability that the wind direction will not chance from one 20 sector during 24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br /> is li.
The same probability for a 60 sector is 9 percent in summer and 12 percent in winter.
The atmospherig dispersion formula used for longer than a few hours accord-ing to Gifford' is:
1 F
f.
X /Q =
II' i
1 r
S
/_, i
_ X (3) a;g f
u Where Fi is the fraction of time that any single meteorological stability class exists at the site and fi is the fraction of the time that the wind associated with a single stability class will blow in the sector of interest.
1l For the sector of interest, the width, p, is 2 tan (22.5/2), or 0.397.
X is the actual distance between the center of the containment and the down-wind position and ai is the vertical dispersion parameter associated with z
distance X and correct 2d for the effect of dilution in the " wake" of the building at short devawind distances.
The following values were used for the 24-hour release model:
Stability Fraction 6
Fraction Class F
m/sec f
g f
C
.375 2.9 1.0 2l F
.625 2.0 1.0 nn4 nn edu.V/
0.i. %
^=ene=ent 2.3-6 2
4 Meteorology
' O)
(.,
2.3.5.3 Long-Term Releases Since the Rancho Seco area is more closely related to Stockton during day-light hours, it was assumed that unstable conditions occur there as in Stockton approximately 29 percent of the time and, for the sake of conser-vatism, correspond to stability Class C.
During the nighttime hours the site meteorology resembles more closely that of Sacramento which has the stable conditions distribution of 17, 13, and 11 percent for Classes E, F, and G, respectively. For the balance of the time, or 30 percent, neutral y
stability (Class D) is assumed.
The basic dispersion model assumed to apply to the 30-day release is the j
same as for the 24-hour release. The following yearly averaged parameters were used in the 30-day release:
Fraction IF Fraction
- Stability Class F
m/sec f
f 9
Pasquill C 0.29 2.9 0.34 D
0.30 4.6 0.18 E
0.17 4.3 0.18 F
0.13 2.0 0.17 l2 G
0.11 1.2 0.10 t
Table 2.3-3 indicates the calculated dispersion factors for the short and long term releases.
TABLE 2.3-3 RANCHO SECO SITE ATMOSPHERIC DISPERSION FACTORS 1
Distance From (X/Q)2 hrs (X/Q)24 hrs (X/Q)30 days Center of Containment 3
3 3
i meters sec/m sec/m sec/m
-5 4 x 10 1.94 x 10
9.3 x 10 1.26 x 10~
-5
-6 7 x 10 1.41 x 10~
4.8 x 10 6.50 x 10 3
-4
-5
-6 10 1.11 x 10 3.0 x 10 4.10 x 10 2
-6 l
2 x 10 5.45 x 10~
1.1 x 10~
1.51 x 10 4 x 10 2.56 x 10~
3.5 x 10-6 5.72 x 10' 3
3
-5
-6 7 x 10 1.48 x 10 2.0 x 10 2.59 x 10-7 4
4
-6
-6
-7 10 8.85 x 10 1.15 x 10 1.50 x 10 4
-6
-7
-8 2 x 10 4.32 x 10 4.55 x 10 5.82 x 10
(_,/
- Represents, the maximum fraction of the time that the wind associated with a given stability class will blow in any 20' sector.
2.3-7 0 !7(i Amendment.2
,n. n n_
VU;/U
Meteorolocy 2.3.5.4 Rainout The effects of rainout on ground concentration of activity rc1 cased was d
evaluated using Gifford's and Culkowski's formula:
Il AQ g,
- y' Ax r
exP (4) o g
a 2o2 a
oy y
where Wr is the rate of deposition per square meter and Q is the tint g
averaged activity leaking out cf the containment building during a givtn period of time and A is the washout removal coefficient.
Precipitation records at Sacramento indicate that the probability of con-tinuous rainfall for 8 hours9.259259e-5 days <br />0.00222 hours <br />1.322751e-5 weeks <br />3.044e-6 months <br /> is 10 percent and for 24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br /> is 0.45 per-cent when the rain intensity is in the 0.01 to 0.09 inches per hour rance.
Since more than 80% of all rainfall intensities are less than 0.10 in./hr an average rain intensity of 0.05 in./hr was assumed for the purpose of rainout evaluation. Heavier rains of 0.1 to 0.25 inches per hour werc found not to last for periods longer than approximately 8 hours9.259259e-5 days <br />0.00222 hours <br />1.322751e-5 weeks <br />3.044e-6 months <br />.
Still heavier rains of more than 0.25 inches per hour did not continue for mor1 than 5 hours5.787037e-5 days <br />0.00139 hours <br />8.267196e-6 weeks <br />1.9025e-6 months <br />. Rainfall is associated with winds from the S E-SSE dire c-tions approximately 46 percent of the time.
For the purpose of this evalua-tion (see section 14.3), it was conservatively assumed that the rain is associated with neutral meteorological conditions (Class D) and a wind speed of 4.7 m/sec.
2l (Deleted)
__n n3 n
'd U e / 8 ~~
0.i.77 2.3-8 Amendment 2 m
r 20 A =.54%
~
CALM = 13.0%
AVG. SPEED = 1.3 m/sec 10 5
SPEED (m/sec) 1.5 1.5 1.5 0
0 0
0 1.5 [
1.5 1.4 1.4 1.5 1.5 1.5 1.5 1.5 A-B = 5.31%
10 - CALM = 11.3%
AVG. SPEED = 1.5 m/sec 5
I4 1.3 1.3,
)) 4 j,4 g 1.6 1.6 1.7 1.9 1.6 1.7 1.7 1.6 1.6 g
B = 8.50%
$10 CALM = 8.5%
y AVG. SPEED = 2.1 m/sec 5
1.7 1.6 i j,4,1.6 1.6 2.1 2.3 2.6 2.9 2.8 2.2 2.4 2.3 2.4 2.0 25
~
B-C = 4.51%
CALM = 0%
20 AVG. SPEED = 4.3 m/sec 15 10 5 -
3.8 4.1 3.6 0
3.9 4.1 4.0 4.4 4.4 4.4 4.1 3.8 4.0 4.2 4.5 4.5 i
0 N
N E
E E
S S
S S
S W
W W
N N
N N
E N
S E
S S
W S
N W
N E
E E
E W
W W
W WIND DIRECTION FIGURE 2.3-1 STABILITY INDICES BY WIND DIRECTIONS AND AVERAGE SPEED (SACRAMENTO)
$)SMUD 30;n 017s SACRAMENTO MUNICIPAL UTIUTY DISTRICT e
9 C = 5.31%
CALM = 2.5%
10 AVG. SPEED = 3.2 m/sec 5
, 2.4 l 1,9 l
- 2.9 2.7 3.1 4.4 4.3 3.2 2.5 2.6 3.2
- 3. 3 3.3 35 C-D = 1.56%
CALM = 0%
AVG. SPEED = 5.6 m/sec 25
- 20 UZ 15
$o y10 SPEED (m/sec)
-T 5
.6 5.7 5.8 4.6 0
5.7 0
0' 5.5 5.6 5.7 5.2
, 5.7 5.5
- 5. 5 5.9 0
D = 33.57%
15 CALM = 1.7%
AVG. SPEED = 5.7 m/sec 10 5
3.5 I.9 2.2 12.4 l 3.4 5.5 6.8 5.3 6.2 6.7 5.6 i
5.4
- 6. 4 5.1 0
N N
E E
E S
S S
S S
W W
W N
N4 N
N E
N S
E S
S W
5 N
W N4 E
E E
E W
W W
VW WIND DIRECTION FIGURE 2.3-2 STABILITY INDICES BY WIND DIRECTIIONS AND AVERAGE SPEED (SACRAMENTO) )
$SMUD 0C!93 SACRAMENTO MUNICIPAL UTILITY DISTITRICT a
20 E = 17.32 6 CALM = 0%
15 AVG. SPEED = 4. 3 m/se:
10 SPEED (m/sec) 5 4.2 4.0 4.3
- 4. 3 4.2 3.9 3.9 3.7, 3.7 4,1 4.2 4.3 4.3 4.4 4.5 4.4 20 15 F = 12.72%
CALM =.5%
Z AVG. SPEED = 2.d5 m/ set tu 3 10 3
T 5
2.2 2.4 2.5,2.6 2.6 2.6 2.5 2.6 2.5 2.4 2.4 2.5 2.5
- 2. 5 2.4 15 G = 10.60%
CALM = 12.6%
10 AVG. SPEED = 1.22 m/ set I
5 I4 l4 I4 I4 I4 I4 I4 I4 1.4 I4 I4 I * *4 l **
~
1.4 0
N N
E E
E S
S S
S S
W W
W N
FN N
N E
N S
E S
S W
S N
W bN E
E E
E W
W W
VW WIND DIRECTION FIGURE 2.3-3 STABILITY INDICES BY WIND DIRECTZIONS AND AVERACE SPEED (SACRAMENTO D)
$m SMUD Uu'"
on4 n -
oiso SACRAMENTO MUNICIPAL UTILITY DIS' STRICT
30 A =.61%
25 CALM = 4.9%
AVG. SPEED = 1.4 m/sec
.20 15 10 SPEED (m/sec) 1.5 1.5 1.5 1.5 1.5 i 1.4 l 1.5
.5 1.5 1.5 1.5 1.5 20 A-B = 4.74%
15 - CALM = 14.8%
AVG. SPEED = 1.5 m/see t
10 l
5 1
l 1.5 l
- 1 1.5 !
.6 l 1.6 l
- 1.5 1.6 1.7 1.9 1.9 1.7 22.0 1.8 25 B = 9.46%
20 - CALM = 11.4%
i AVG. SPEED = 2.2 m/sec 15 10 5
I9 I*
I7
'I *7 l 1,7
, 2,3,
1.7 1.9 2.7 2.6 2.9 2.7 22.5 2.3 N
N E
E E
5 S
S S
S W
W W
N N
N N
E N
5 E
S S
W S
N W
N E
E E
E W
W W
W WIND DIRECTION FIGURE 2.3-4 STABILITY INDICES BY WIND 1' DIRECTIO'iS AND AVERAGE SPEED (SITOCKTON)
($)SMUD 7
0181.
UUiE SACRAMENTO MUNICIPAL LUTIUTY DISTRICT e
P 35 I
J 0
B-C = 7.15%
25 CALM = 0%
AVG. SPEED = 4.3 diet 20 15 10 SPEED (m/sec) 5 4.1 2.7 4.1 3.8 2.1 '
, 3.7 4.3 4.6 4.1 4.2 4.3 4.3 4.3 4.2 0
20 C = 5.92%
CALM = 6.8%
@ 15 AVG. SPEED = 2.9 m/sec
>U 10 3
l 30 S E!
2.0
- l 1 2.5 2.1 2.6 2.8 2.1
- I 2.5 3.3 3.0 3.4 3.7 3.9 2.8 30 C-D = 1.44%
CALM = 0%
25 l
AVG. SPEED = 5.3 m/sec 20 I
15 10 5
4.5 43 5.3 4.6 4.1,0 0
0 l l 4.4 !
I O 4.9 5.2 4.8 5.5 5.5 5.5 N
N E
E E
5 5
5 5
5 W
W W
N N
N N
E N
5 E
5 5
W S
N W
N E
E E
E W
W W
W WIND DIRECTION FIGURE 2.3-5 STABILITY IhT1 ICES BY WIND DIRECCTIONS AND AVERAGE SPEED (STOCKT02::;)
(gs[ gun M
0182 SACRAMENTO MUNICIPAL UTILITV / DISTRICT
~
r 15 D = 21.51%
AVG. SPEED = 3.5 nv'sec
^
10 -
S -
2 2.6;,,,;2.2 2.4 2.9 4.0 4.3 2.5 2.8 4.3 4.1 4.3 5.1 6.5 3.9 g.,
30 -
E = 10.83%
25 CALM 0%
AVG. SPEED = 4.2 m/sec 20 15 10 SPEED (m/sec)
U 5 Z
4.3 4.2 4.2 4.3 4.1 4.0 4.6, 4.2 y
3.6 3.6 2.i 3.33.8 3.5 3.8 3.i O O E
25 F = i2.81%
20 CALM = 5.8%
15
^
10 5
2*4 2.2 2.i 2.2 i
2.3 j
i i.9 l 2.3 2.5 2.5 2.6 2.6 2.5 2.6
-l 2.5 l 2.4 l 2.4 0
G = 25.54%
10 CALM = 37.9%
5 AVG. SPEED = 0.9 m/sec i.5 l i.s,i 1.5, i.5 !
,4 I
i.4 1
, j i.5 ; i.5 i.5 i
i.5 i.5 i.5 i.5 i.5 i.5 i.5 N
N E
E E
S S
S S
S W W W
N N
N N
E N
5 E
S S
W S
N W
N E
E E
E W
W W
W WIND DIRECTION FIGURE 2.3-6 STABILITY INDICES BY WIND DIRECTIONS AND AVERAGE SPEED (STOCKTON) 0.t83 (GvSMUD nn4 n,
= "
SACRAMENTO MUNICIPAL UTILITY DISTRICT
~ l
e g
h a
\\v 2.4 HYDROLOGY 2.4.1 CHARACTERISTICS OF STREAMS AND LAKES IN VICINITY Table 2.4-1 is a summary of reservoirs and lakes in the vicinity of the Rancho Seco Nuclear Generating Station.
Each reservoir and lake is coded by number in Table 2.4-1 for easy
- location on the location map Figure 2.4-1.
2.4.2 TOPOGRAPHY The site is gently rolling and is not intersected by any streams, but is bounded by well-defined drainage courses that intercept surface runoff from the higher site topography. Plant grade at approximately 160 feet elevation above sea level will permit excellent drainage at all times with-out danger of flooding.
Plant areas will be graded to provide natural drainage to lower ground. The rolling terrain of the site affords excel-lent drainage along natural gullies at gradients varying from two to six percent. Elevations vary from 130 feet to 280 feet above sea level.
2.4.3 TERMINAL DISPOSAL OF STORM RUNOFF The site is bounded on the north by Hadselville Creek, which intercepts all drainage from the site and empties into Laguna Creek to the west.
Flow
',,_s
')
is continued westerly by Laguna Creek South, which is a tributary of the N/
Cosumnes River, and into the Mokelumne Rivcr. The Mokelumne is a tribu-tary of the southerly flowing Sacramento River and enters the Sacramento River approximately 20 miles south of the City of Sacramento.
2.4.4 HISTORICAL FLOODING Within recent historical times no flooding or inundation from storms or runoff has occurred within the site boundaries.
It is quite unlikely that the site can inundate or flood, even with abnormal rainfall intensities.
2.4.5 PREDICTION OF LAND URBANIZATION A survey conducted by the County of Sacramento indicates that the land adjoining the site, within at least a 15-mile radius, will remain primarily for agricultural and grazing use; therefore, the rainfall runoff factors will remain constant and not cause any difference in hydrological proper-ties.
0~i84
^^
(m; DUl7v
/
2.4-1
/
/
\\
TABLE RANCHO SECO K DATA ON RESERVOIRS AND LA Wo.
Reservoir Owner River 1.
Lake Cumble Nevada Irrigation District Bear River South Sutter Water District Bear River 2.
Camp Far West 3.
Auburn Dam
- US Bureau of Reclamation Middle Fork /American River 4.
Edson Lake Georgetown Divide Public Utility District Pilot Creek 5.
Jenkinson Lake US Bureau of Reclamation Sly Park Creek 6.
Slab Creek Sacramento Municipal Utility District South Fork /American River 7.
Chili Bar Pacific Gas 6 Electric Company South Fork /American River 8.
Folsom US Army Corps of Engineers American River 9.
Lake Natoma US Bureau of Reclamation American River 10.
Jackson Creek Jackson Creek Irrigation District Jackson Creek 11.
Arroyo Seco Charles Howard Estates Tributary / Dry Creek 12.
Lower Bear River Pacific Gas & Electric Company Bear River 13.
Camanche East Bay Municipal Utility District Mokelumne River 14.
Pardee East Bay Municipal Utility District Mokelumne River 15.
Salt Springs Pacific Gas & Electric Company North Fork /Mokelumne River 16.
Tiger Creek Afterbay Pacific Gas 6 Electric Comaany North Fork /Mokelumne River 17.
New Ilogan US Army Corps of Engineers Calaveras River 18.
Salt Springs Valley Rock Creek Water District Rock Creek 19.
Wallace M.
I. Crocker Co.
Tributary /Mokelumne River 20.
Tullock Oakdale & San Joaquin Irrigation District Stanislaus River 21.
New Melones US Army Corps of Engineers Stanislaus River 22.
Woodward South San Joaquin lerigation District Simmons Creek 23.
Farmington US Army Corps of Engineers Littlejohn Creek 24.
Davis No. 2 Fred Podesto Tributary /Calaveras River 25.
Woodbridge Diversion Woodbridge Irrigation District Mokelumne River 26.
Putah Creek Diversion US Bureau of Reclamation Putah Creek 27.
Marsh Creek Contra Costa FCWCD Marsh Creek 0 Completion Scheduled for 1976.
- Information Not Available.
0185
'OU I N T
amendment 2
_J
l k
1 k.4-1
) CLEAR STATION
[ES WITil1N A 50-MILE RADIUS Hydrology
- Area of Maximum Dead Dead Average Reservoir Storage Storage Area Storage Volume Flow Distance 2
!(Acres)
(Acre Feet)
(Acres)
(Acre Feet)
(CFS)
(Miles)
Direction 9,000 47 N
2,680 150,000 2,000 100,000 495 50 NNW 10,390 2,500,000 3,250 3,700 2,150 40 N
325 20,000 75 2,000 47 NE 648
'.1,000 400 64 40 NE 250 16,600 45 600 870 39 NE 135 3,030 75 1,480 1,070 34 NNE 11,450 1,010,000 2,030 90,000 3,450 26 N
540 8,800 1,800 21 NNW 385 22,000 75 2,400 46 13 E
104 2,433 0
0 6
ENE 720 48,500 49 ENE 435,000 1,080 11 SE 2,134 210,000 938 15 ESE 925 139,400 120 2,000 252 50 ENE l
I 105 3,960 154 34 ENE 4,670 325,000 715 15,000 275 21 SE 920 10,000 27 29 SE 188 3,000 13 SE 1,260 68,400 180 4,000 1,670 42 SE 12,500 2,400,000 310,000 1,630 41 SE 2,427 35,000 37 SSE 4,100 52,000 0
0 32 SSE 151 1,400 20 SSE 474 2,464 592 16 SW 125 48 WNW f
335 4,425 45 SW l
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' s' 2.5 GEOLOGY The Rancho Seco project is located about 30 miles southeast of Sacramento in the low hills at the edge of the Sierra Nevada Mountains. The site will be founded on the Pliocene Laguna Formation and is underlain by an estimated 1,500 to 2,000 feet of Tertiary or older sediments deposited on a basement complex of granitic to metamorphic rocks.
Explorations at the site included field mapping, approximately 1,552 feet of bucket auger holes logged in detail, a 602-foot core hole visually and geophysically logged, 874 feet of 4-1/4-inch borings soil-sampled and logged, and approximately 11,500 feet of geophysical refraction profiles.
The data obtained indicated the unfaulted nature of the sediments and their suitability as a foundation upon which to build the proposed nuclear generating station.
A detailed account of the conditions at the proposed site will be found in Appendix 2C (Geology and Seismology).
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2.6 SEISMOLOGY There is no indication of faulting beneath the site. The nearest fault system, the Foothill Fault System, is located about 10 miles to the east of the site and has been inactive since the Jurassic Period, some 135 million years ago.
The active faulting along which historic large earth-quake shocks-have originated are the Hayward and San Andreas Faults, some 70 and 89 miles to the west respectively, and the faults 80-plus miles to the east beyond the Sierra Nevada Range.
There is no reason to anticipate fault propagation in-the site area. Earth-quake shaking will occur as the result of shocks along distant faults, but due to their distant origin and nature of the foundation material beneath-the site, ground accelerations of no greater than 0.05 g should occur during the life of the plant. Therefore, a conservative value of 0.1 g will be used for design.
Further discussion of the site seismicity may be found in the Seismic report.in the Appendix 2D and supplements and the earthquake design cri-11 teria for the site can be found in Appendix 5A.
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2.7 SOILS The soil and foundation investigation program was performed (Appendix 2F) to determine the suitability and the engineering properties of the soil and foundation at the Rancho Seco site.
The investigation was carried out concurrently with the geologic and geophysical investigation. Ten soil borings, supplemented by test trenches and bucket auger holes, were drilled into the foundation from which samples were obtained for laboratory test-ing, and static strength testing were performed on representative soil samples. Standard testing procedures and techniques were utilized through-out the program.
The results of the drilling and sampling and laboratory testing provided the basic technical data from which the foundation and engineering proper-ties of the soils were analyzed.
It was concluded that the soils at the Rancho Seco site are sufficiently strong to safely support the nuclear containment structure and appurtenant facilities. These soils can be categorized as hard-to-very-hard silts, and silty clays with dense-to-very-dense sands and gravels.
An allowable bearing value of 9,000 pounds per square foot is recommended for the containment structure and those portions of the nuclear steam sup-ply system critical to nuclear safety, based on maximum tolerable settle-ment criteria.
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D 2.8 SITE ENVIRONMENTAL RADIOACTIVITY PROGRAM 2.8.1 GENERAL At least one year prior to the operation of Rancho Seco Nuclear Generating Station Unit 1, an environmental monitoring program will begin, serving two functions. The first function is the determination of the preoperational base or datum level of radioactivity in the environment, above which contrib-utions from plant operations can be measured.
The second function is to determine the effect of plant operations on the environment. The program will also serve as a backup indicator or check of the effectiveness of inplant measurement and control of waste gas dis-charge. Significant quantities of radioactive material should not be released to the environment, and the operational phase of the program is intended to demonstrate this.
To provide a basis of comparison between pre-and post-operational monitoring programs, sample type, location, and frequency will be established in the pre-operational phase with the intent that samples will remain largely unchanged in the post-operational period.
However, during the pre-operational phase, a continuing review will be made of the adequacy and suitability of the program for operational monitoring.
2.8.2 LAND ENVIRONMENT I(N~s)-
With specific regard to land environment, the only significant route of transfer of material from the plant is via plant vent releases. Under 1
J normal conditions, the design of the plant is such that only the noble gases, krypton and xenon, would be released. However, under unusual oper-ating conditions, small quantities of radioactive iodines may be released from the stack. No appreciable amount of strontium-90 would be released in plant gaseous waste under normal operating conditions.
J 2.8.2.1-Noble Cases Ef fect The predominant ef fect of the noble gases, krypton and xenon, derives from the external radiation exposure they may contribute since, as inert gases, they cannot be reconcentrated in envit..nmental media in the human food chain. Since the gases constitute the major contribution of the plant to
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the environment, the land environment program is primarily intended to 1
detect changes in environmental radiation levels attributed to this source.
For the anticipated very low' levels of radiation created, the only detector of suitable reliability and sensitivity is one which integrates exposure over a long period. Consequently, film packets will be used at appropriate locations in the vicinity.
In order to provide adequate detection sensi-tivity, these films will be changed on a quarterly basis in the absence of unusual releases.
2.8.2.2 Air Sampling Stations Radioactive.particulates in the air will be detected by high volume air i
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-sampling stations. The stations will be equivalent to those which are
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operated by the California Department of Public Health and the U. S. Public 0191 Amendment 1 2.8-1 nnmnI gym os
Health Service. They will provide correlation between activity levels at Rancho Seco and adjacent locations.
2.8.2.3 Iodine Detection A good sampling medium exists in the vicinity of the plant for the detection of radioactive iodine. This consists of examining the thyroid glands of grazing animals, particularly cottontail and jack rabbits which are abundant in the area.
Since the rabbit samples vegetation upon which deposition may have occurred and concentrates any iodine activity in its thyroid, collec-tion and analysis of rabbits at suitable intervals provide an indication of the presence of iodine at levels of sensitivity which far exceed other sampling techniques. The area over which the cottontail and jack rabbit ranges during its lifetime is small enough to ensure that such sampling is representative of the immediate area.
2.8.3 WATER ENVIRONMENT Spot checks of surface, well, and rain waters will be performed.
2.8.4 SAMPLING 1
The samples collected will include the following:
a.
Airborne particulate material b.
Water (rain, surface,, and well) c.
Milk d.
Soil and silt e.
Vegetation f.
Fish g.
Animals The gross alpha and gross beta-gamma activity of the samples will generally be measured and specific radionuclides will be identified when approrriate.
Special analyses, such as determination of Sr90 in milk, will be performed by an outside laboratory.
Since the program has not been completely developed, the f requency of observations and sampling have not been finally determined. However, a tentative program for environmental radiation monitoring is given in Table 2.8-1.
The final program is expected to reasonably conform to this, though changes are expected for such items as sample collection frequency and number of stations.
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TABLE 2.8-1 ENVIRONMENTAL RADIATION MONITORING PROGRAM Vg Item Type of Analysis Type of Sample Sample Collection Number of Samples per R
Frequency S ta tions Year 5!
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- 1. Background Gamma Gamrns Continuous record-Read & record One Monitoring ing weekly g
- 2. Airborne Particu-Gross Beta-Gamma About I c fm Filter paper One 52 late continuous collected weekly
- 3. Water Gross Beta-Gamma Continuous (Shower Monthly One 12
- a. Rain Water cap over funnel during rainless periods)
Strontium-90 Continuous Quarterly one 4
b.
Surface Water Soluble Gross Spot Weekly Two 104
,ta Beta-Gamma co Soluble b
Gross Alpha Spot Weekly Two 104 4
i Insoluble Gross Spot Weekly Two 104 Beta-Gamma 1'
kg, Insoluble g'
Cross Alpha Spot Weekly Two 104 0) l Gamma Spectrum Spot Semiannual Two 4
- c. Well Water Gross Beta-Gamma Spot Weekly Three 156 4
1 Gross Alpha Spot Weekly Three 156 Uranium Spot Quarterly Three 12 C
Strontium-90 Spot Semi-Annually Three 6
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- 4. Milk Gross Beta-Gamma Spot Quarterly Four 16 4
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w TABLE 2.8-1 Continued Item Type of Analysis Type of Sample Sample Collection Number of Samples per Frequency Stations Year K-4 0 4
Sr-90 4
I-131 Spot Semi-Annually Two 4
Cs-137 4
- 5. Soil and Silt
- a. Soil Gross Alpha Sunshine method Quarterly Five 20 Gross Beta-Gamma Po ta s s ium-40 Sunshine method Annually Two 2
- h. Silt Gross Alpha Spot Semi-Annually Two 4
Gross Beta-Gamma w
Strontium-90 Spot Annually Two 2
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- 6. Vegetation Gross Alpha Stems, leaves and Spring and Fall Five 10 Gross Beta-Gamma fruit Pot a s s ium-40 Strontium-90 Stems, leaves and Annually Five 5
g.j, Gamma Spectrum fruit Annually Five 5
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- 7. Fish (llatchery)
Gross Alpha Quarterly Two 8
Gross Beta-Gamma Po t a s s ium-40 Strontium-90
- 8. Animal (rabbits)
Gross Beta-Gamma Spot S emi-a n.iu a l ly One 2
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and Potassium-40 S.
of muscle, soft tissue, and bone t J C3 7, I-131 of thyroid f d
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2.9 REFERENCES
1.
Pasquill, F., "The Estimation of the Dispersion of Windborn Material,"
Meteoroloey Macazine 90 (1063) 33-49 (February 1961) 2.
Gifford, F.
A., Jr., " Atmospheric Dispersion Calculations Using the Generalized Gaussian Plume Model," Nuclear Safety, II, 56-59 (December 1960) 3.
Culkowski, W.
M., " Deposition and Washout Computations Based on the Generalized Gaussian Plume Model," ORO-599, Weather Bureau Research Station, Oak Ridge Tennessee (S ep tember 30, 1963) 9 O D D D Y}
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