ML19350D754

Forwards Study of Evacuation Time Estimates,In Response to NRC 801209 Request

ML19350D754
Person / Time
Site:	Hatch
Issue date:	05/08/1981
From:	Widner W GEORGIA POWER CO.
To:	Office of Nuclear Reactor Regulation
References
NUDOCS 8105190194
Download: ML19350D754 (18)

Text

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, ce 3 es cert aac Geae s! Vaaage' sc ear sace a en May 8. 1981 .Q IS/ 'fr f\\} D %-i /N N < db 3s%y' .c \\ U. S. Nuclear Regulatory Commission g,/ g,,"y 1r4p p Office of Nuclear Reactor Regulation Washington, D. C. 20555 v o g. WC CCCKETS 50-321, 50-366 6 - .e\\'p OPERATING LICENSES CPR-57, NPF 4/j'ig {i / ' EDWIN I. HATCH NUCLEAR PLANT UNITS 1, EVACUATION TIME ESTIMATES Gentlemen: In res::ense to your letter of December 9, 1980, Georgia Power Company submits the attached study of the evacuation time estimates. Yours truly, .s W. A. Widner WHC/mb xc: M. Manry R. F. Rogers, III OVS s i/ 8105190 M

EVACUATION TIME ESTIMATES In the event cf a major incident o Nuclear Power Plant, ccurring at the Edwin I. Hatch it is envisioned that nuclear mat possibly affect an area ten miles in r d erials could %eather and wind conditions will a ius from the plant site. and distance that nuclear materialsplay a major role in the direct may extend. has been divided into sixteen 22 1/2' The affect J area around the nuclear facility. annular sections constructed effective method for determining affThe annular sections will p an natorials will spread laterally ected areas since the nuclear from the plant site. , as well as forward, when drifting The lateral pattern will tend to as distance increases. spread wider determine which annular sectionsRadiation protection opera can easily providing reliable data for evacuatinare affected by the incident, thus restrictions upon the population living affected areas or effecting g in the area. restrictions would be directed only wi h Evacuation and/or ccctions determined to be affected by tht in the boundaries of the an nular e incident. showing transportation networks A map of the EPZ b:undaries, stc4ctures, and commerci l, topographical features, poli a in Figure J-2. and special facilities is given Estimates of evacuation times were Civil Defense Directors of Applingmade in consultation with the C; unties, County Sheriff's offices, Toombs, Tattnall, and Jeff Davis cenance departments, Altamaha DMC, representatives froc County main- 'ivil Defense Planners, and the G, Georgia Forestry Commission, State Sinco the EPZ is located in an extreorgia Department of Transportation emely rural area, there was no need I i e

Minor Roads Normal Conditions: Capacity = 2,000 (.51)( 77)(.90) = 650 VPH Adverse Conditions: Capacity = 2,000 (.30)(.77)(.90) = 410 VPH Information considered in population estimates included individual County tax maps, road maps, aerial photography, and windshield surveys. Population estimates were obtained by counting residences in the area. An average of 4 individuals per residence was assumed. It was further assumed that each household would use one automobile in evacuation. Population segments considered in the analysis included permanent residents, pe-sons in special facilities, and invalids. Transients in this rural area were considered negligible. Most transients would be passing through the area on U.S. Highway 1, major route for evacuation, i and could be notified from aircraft or Sheriff's vehicles. The popu-lation distribution of permanent residents is given in Table J-3. Esti-mated vehicle distribution is given in Table J-4. Special facility populations within the EPZ considered in this analysis include Toombs Central High School and Altamaha Elementary School (Figure J-2). Populations at campsites in the area were con-sidered negligible for this analysis, although persons in such areas will be notified by use of aircraft mounted speakers or Sheriffs' vehicles. The Toombs Central High School, located in Sector N, has a normal population of 600. The Altamaha Elementary School, located in Sector SSW, has a normal population of 300. l O t I l l l

Principal evacuation routes to reception centers are depicted in Figure J-3. Evacuation routes are adequate to move the population from any part of the ten mile Plume Exposure Pathway. The only physical barrier in the area is the Altamaha River, which bisects the EPZ along an east-west line. Evacuation of Sectors ESE, SE, SSE, S, SSW, and Appling County portions of Sections SW, WSW, and W will channel evacuees to U.S. Highway 1 and then south to the reception center at the Appling County Elementary School. Evacuation of portions of Jeff Davis County Sectors SW, WSW, and W in the 5 to 10 mile zone would channel evaucees to the Altamaha School Road and to U.S. Highway 341 and then to the reception center at the Jeff Davis Middle School in Hazelhurst, Georgia. Evacuations of Tattnall County portions of Sectors ENE and E would channel evacuees to Georgia Highway 147 and then to the reception center at the Reidsville High School. Evacuations of Sectors WNW, NW, NNW, N, NNE, NE, and Toombs County portions of Sectors ENE and E would channel evacuees to U.S. Highway 1 and Georgia Highway 147 and then to the reception center at Lyons High School. Roadway characteristics of principal evacuation routes within the EPZ are given in Table J-5. Movement of the evacuees along these predetermined routes could be affected by one or more of the following accident related factors: 1. A General Emergency resulting in a major release which affects a large area could dictate rerouting the evacuation traffic. 2. A slow wind causing a radioactive plume to drift slowly over ) all or a portion of an evacuation route would dictate rerouting the evacuation traffic. sl

w u e e em m a m 3. A temperature inversion, i.e., a reversal of the normal atmos-pheric temperature gradient, causing released radioactive materials to remain near the ground surface could result in rerouting of the evacuation traffic. Radiological monitoring teams collecting samples throughout the ten mile zone (Figure J-1) will provide the data used as the basis for deter-i mining which areas to evacuate. '.f it is decided to evacuate one or more of the 22 1/2* sectors, the principle sector (s) and the adjacent sectors will be evacuated. Since the population in the affected sectors is not familiar with the 22 1/2* sector boundaries, emergency instructions will employ the use of landmarks, street names and similar ground features to describe the area to be evacuated. Privately owned vehicles will be the primary mode of transportation if evacuation is directed. County school buses, traveling their regular routes, will provide transportation to those individuals lacking personal o transportation. Invalids registered with the County Civil Defense Units will be evacuated by an appropriate vehicle dispatched directly to their homes (Figure J-4). There are no institutional facilities located within the ten mile zone, with the exception of the Altamaha Elementary School and the Toombs Central High School, which will require special consideration in an evacuation. The school buses which transport students remain on the school grounds during the day. For this reason, if it became necessary to evacuate the schools, the entire school populations could be transported to safety within one hour under all conditions. Evacuated students will be transported in groups to the reception centers. t m.

Table J-6 presents a summary of the evacuation analysis. Areas were subdivided with according to local County Civil Defense plans for moving evacuees into reception areas. The prompt notification system will alert the affected populations within 15 minutes. Time for prepa-ration of evacuation is assumed to be 30 minutes following notification. Evacuation time presented in Table J-6 represents travel times for popu-lations to leave the 2, 5, and 10 mile radii within the EPZ. Confirma-tion times presented represent the times required to make visual obser-vations of residences to confirm evacuation. Confirmation would be made frc, six Sheriff's vehicles or Civil Defense vehicles in both Toonbs and Appling Counties. Tattnall and Jeff Davis Counties could be confirmed using one vehicle in each area. The maximum time requ:. > for evacuation and confirmation of the entire 10-mile EPZ under adverse conditions is estimated '.o be 4 hours and 50 minutes. The assumption for this is that notification, preparation, evacuation, and confirmation would take place sequentially. A more reasonable assumption would include some overlap in time between notification and preparation and between evacuatien and con-firmation. With such overlap, the entire EPZ could be evacuated and con-firmed within 3 hours under adverse conditions. I l JAG:bjk 03/13/81 t e - ~ - -

^~ TABLE J-3 Estimated Population Distribution Within The EPZ Sector 0-2 Miles 2-5 Miles 5-10 Miles Total N O 184 612 796 NNE O 40 552 592 NE O 72 480 552 ENE O 28 396 424 E O O 56 56 ESE O 48 260 308 SE 12 120 292 424 SSE 12 208 376 596 S 24 140 932 1,096 SSW 24 204 440 668 SW 72 288 384 WSW 32 60 336 428 W 48 44 148 240 WNW 16 16 192 224 NW 0 60 496 556 NNW 16 184 432 632 208 1,480 6,288 7,976 t v-

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-1M-% TABLE J-4 i Estimated Vehicle Distribution Within The EPZ i l t Sector 0-2 Miles 2-5 Miles 5-10 Miles Total N O M6 153 199 NNE O 10 138 148 NE O 18 120 138 ENE O 7 99 106 E O O 14 14 ESE O 12 65 77 SE 3 30 73 106 SSE 3 52 94 149 S 6 35 233 274 SSW 6 51 110 167 SW 6 18 72 96 WSW 8 15 84 107 W 12 11 37 60 WNW 4 4 48 56 NW 0 15 124 139 NNW 4 46 108 158 52 370 1,572 1,994 4 h w w --m

Table J-5 Roadway Characteristics Capacity Capacity Number of (VPH) (VPH) S^ ament (s) Lanes Type Normal Adverse Comments 1-4 2 Rural Highway 1,000 470 U.S. Highway 1 5-7 2 Rural Highway 1,000 470 Ca. Highway 56 8 2 Rural Highway 650 410 $12 05 9-13 2 Rural Highway 650 410 Ga. Highway 107 .14-15 2 Rural Highway 1,000 470 Ga. Highway 147 16 2 Rural Highway 650 410 S601 17-19 2 Rural Highway 650 410 S1824 10 2 Rural Highway 650 410 S2538 21-22 2 Rural Highway 650 410 S603 a E me*.-* see. m m

Table J-6 EVACUATION TIME ANA1.YSIS i General General f Population Population Invalide Invalide Evacuation Evacuation Evacuation Evacuation i Fernament Fernanent Notification Preparation Time Time Time Time Confirmation S etsre Population Vehicles Time (Min.) Tina (Min.) Normal (Min.) Adverse (Min.) Normal (Min.) Adverse (Min.) Time (Min.) VITHIN TWO MILES WNW, NW, NNW, M, NNE. NE, ENE, E 32 8 15 30 5 6 0 0 20 ESE, SE, SSE, S, SSW, SW, WSW, W 176 44 15 30 5 6 15 20 30 7 WITHIN FIVE MILES WWW, NW, NNW, N, NNE, NE ENE, E 676 154 15 30 12 16 25 30 40 1 Hour ESE, SE, SSE, S. SSW, SW, WSW, W 1,072 268 15 30 15, 20 17 21 & 10 Min. WITHIN TEN MILES 1 Hour 1 Hour 2 Hours WNW,NW,NNW(gy,E(g)3,548 NNE, NE, ENE 887 15 30 30 40 & 30 Min. & 45 Min. & 0 Min. ENE(2),E 256 64 15 30 12 0 0 40 Min. II ESE, SE, SSE 1,304 326 15 30 20 25 15 20 2 Hours & 20 Min. 1 Hour 1 Hour 2 Hours WSW{jy,WSy), S. 2.280 570 15 30 30 45 6 0 Min. & 15 Min. & 20 Min. 588 147 15 30 12 18 15 Min. 17 Min. 1 Hour SW 'I, WSW 'I, W( I I I & 20 Min. (1) Portion of Tcombe County (2) Postion of Tattnall County (3) Portions of Appling Countf (4) Portions of Jeff Davis County l

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= %,'S " *""' ~ pflanta,6eargia 30334 a^~;",y March 11, 1981 Mr. T.E. Byerley Manager of Environmental Affairs Georgia Power Company Post Office Box 4545 Atlanta, Georgia 30303 ATTN: James Gardner

SUBJECT:

Emergency Response Plan - Plant Hatch As requested in your letter of February 26, 1981, we met with Mr. James Gardner of your office on March 9, 1981, to discuss what types of data that cur office could furnish to help you prepare the emergency response plan. It was determined that our office would furnish the ca-pacities for each roadway section shown on the attached map under both the normal and adverse conditions. Our calculations are based upon the 1965 Highway Ca-pacity Manual, with some modifications due to type study and conditions needed for your plan. The following equa-tion was used in determining the capacity of each section: Capacity t$ 2000 (density and speed factor) (width adjust-ment factor) (directional distribution factor). The ca-pacities were calculated for the major and minor roads under both normal and adverse conditions. The calculated capacities in vehicles per hour (VPH) are as follows: Major Roads Normal Conditions Capuity d2000 (.66)(.87)(.90) W 1000 VPH Adverse Conditions Capacity ~.; 2000 (.30)(.87)(.90) C 470 VPH

- ~. Page -2 ' Emergency Response Plan March 11, 1981 Minor Roads Normal Conditions capacity # 2000 (.51)(.77)(.90) # 650 VPH Adverse Conditions Capacity 2 2000 (.30)(.77)(.90) d 410 VPH i Using the above data we prepared the attached table showing the capacity of each section under normal and ad-4 i verse conditions. We hope that this is the type data that you need, f If, however, you need additional information please let me know. Yours very truly, l O& W ' y .L. Alston, P.E. State Location Engineer OHR:GG/ggf Attachment O m4 "W = -g_,,

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.%~. Capacity Table Capacity ' Capacity Section Normal Conditions Adverse Conditions _ 1 1000 Vehicles Per Hour 470 Vehicles Per Hour 2 1000 Vehicles Per Hour 470 Vehicles Per Hour 3 1000 Vehicles Per Hour 470 Vehicles Per Hour 4 1000 vehicles Per Hour 470 Vehicles Per Hour 5 1000 Vehicles Per Hour 470 Vehicles Per Hour 6 1000 Vehicles Per Hour 470 Vehicles Per Hour 7 1000 Vehicles Per Hour 470 Vehicles Per Hour 8 650 Vehicles Per Hour 410 Vehicles Per Hour 9 650 Vehicles Per Hour 410 Vehicles Per Hour 10 650 vehicles Per Hour 410 Vehicles Per Hour 11 650 Vehicles Per Hour 410 Vehicles Per Hour 12 650 Vehicles Per Hour 410 Vehicles Per Hour 13 650 Vehicles Per Hour 410 Vehicles Per Hour 14 1000 Vehicles Per Hour 470 Vehicles Per Hour 15 1000 vehicles Per Hour 470 Vehicles Per Hour 16 650 Vehicles Per Hour 410 Vehicles Per Hour 17 650 Vehicles Per Hour 410 Vehicles Per Hour 18 650 vehicles Per Hour 410 Vehicles Per Hour 19 650 Vehicles Per Hour 410 Vehicles Per Hour 20 650 Vehicles Per Hour 410 Vehicles Per Hour 21 650 Vehicles Per Hour 410 Vehicles Per Hour 22 650 Vehicles Per Hour 410 Vehicles Per Hour e - =- ER l , _ _ _ _}}