ML19353A356

Of Evacuation Time Estimates from Areas Near Prairie Island Nuclear Generating Plant

ML19353A356
Person / Time
Site:	Prairie Island
Issue date:	08/25/1980
From:	NORTHERN STATES POWER CO.
To:
Shared Package
ML19353A351	List: ML19353A353 ML19353A356
References
NUDOCS 8101080266
Download: ML19353A356 (18)

Text

{{#Wiki_filter:- O EW CUATION TIME ESTIMATES From Areas Near the Prairie Island Nuclear Generating Plant PUBLIC CODY PERSONAL PRIVACY INFORMATION DELETED IN ACCORDANCE WITH THE FREEDOM 0F INFORMATION ACT i l Prepared by Northern States Power Company 414 Nicollet Mall >:aneapolis, MN 55401 l April, 1980 I REVISED AUGUST 1980 l 8101080hh

EVACUATION TIME ESTIMATES Table of Contents Pace General. 1 Evacuation Preparation. .2 Confirmation of Evacuation. .2 Method Used for Determining Time Estimates. .3 Special Facility Evacuation. 3 Table Evacuation Time. 5 6-15 Map Sectors. Appe ndix. .16 Exit Routes Vehicle Travel Rate l i l l l i l { l l l l l

f PRAIRIE ISLAND NUCLEAR GENERATING PLANT Evacuation Time Estimates General The estimated time required for evacuation of people from areas near nuclear power reactors is in response to a letter from the Nuclear Regulatory Commission (B Grimes) dated November 29, 1979, with an attached guidance titled, " Request for evacuation time estimates (after notification) for areas near nuclear power plants." The estimated time provided herein for both the best conditions and adverse conditions are times required to travel from a residence located within a specific sector, along a predetermined route,. to a designated established location outside the sector being evacuated. 1 The state plan now calls for evacuation to a 10 mile distance. In all cases, every evacuation sector defined in this study emanates from the reactor site outward to the prescribed radius. These estimates were developed under the auspices of the Minnesota Department of Public Safety, Division of Emergency Services, with assistance from the Minnesota Department of Transportation, Emergency Operations Section, who furnisned road traffic volume numbers and certain reasonable assumptions in developing the method used for determining the time estimates as outlined in the attachments. Also the Wisconsin Department of Transportation, Crisis Relocation Section, confirmed the concepts used in developing the method. The Table identifies the 10 sectors at the generating plant, the estimated 1980 population involved, exit routes from each sector, and the evacuation time and confirmation time required in each sector. The ten maps show the area stated in the table and repeat the population, evacuation time, and confirmation time required. Evacuation Preparation It is assumed a prior alert will provide time to prepare for the evacuation and therefore the estimates for the general evacuation do not include any time for preparation. These times could vary from packing a hasty bag (20 minutes) to feeding livestock (several hours). One special evacuation problem is the unwilling evacuee, who must be notified of alternate protective action, such as informing him by message to remain inside with windows and doors closed. Confirmation of Evacuation Present plans (state and local) do not address this need specifically; however, during discussions regarding evacuations of residents, a door-to-door check was considered. The time listed in the table for confirmation assumes a reasonable number of emergency vehicles available to perform this task. l _2

MEml0D USED FOR DETE3NINING TIMI ESTIMATES A process using population densities, local geogrp hy, and road capabilities has been used to determine the evacuation times. 1. The Minnesota Department of Transportation (MDOT) emergency operations, assumes that each vehicle carries two occupants average, so all sector populaticn is divided by two in order to determine the vehicles required to evacuate that sector. 2. Exit routes are assigned traffic volume capacity anounts in " vehicles per hour capacity" (VPHC). We lowest VPHC for any road in each exit route was used to provide conservatism to the time estimates (see page 16). 3. Vehicle travel rate over exit roads are assigned a speed (MPH) according to the area; it being " rural" or " urban." 4. Adverse conditions; bad weather and seasonal road conditions according to MDor should increase the evacaation time by 30 percent. 5. If the rureer of vehicles (half the sector population) is less than the VPHC for the exit route, the time for evacuation depends on the vehicle travel rate. Using the above concepts, the evacuation time estimates have been developed. Special Facilities Evacuation The Ehergency Medical Services Section of the Minnesota Department of Health provided the names of hospitals and nursing hcrnes within the 10 mile l radius of the nuclear plants and provided times required to load and 1 transport patients. tere are no Wisconsin hospitals or nursing homes l within the 10 mile radius of the Prairie Island Plant, although two nursing i l l homes are located just outside that radius (10.5 miles). REV 1 8/25/80 i Page 3 l i l i l

Estimated Time Required (Minutes) Sequence of Events 400 - 450 Patients Incident - Notification of MDH, EMS Section 20* - Notification of Risk Facilities 10* - Request for Transportation 5 - Transport Vehicles to Risk Facilities 60 - Loading Time 180 - Transport to Host Area 60 335 minutes or 5 hours 35 minutes This estimate makes the assumption that reather conditions are good and the use of enough vehicles to transport everyone without return trips. For the adverse time required to evacuate the above facilities, the 30 percent increase in time used for general evacuatiin is reasonable. It is assumed that confirmation of removal would be an integral part of the evacuation process carried out at each of the Special Facilities. i i l

• The notification times were included in this Special Facility Evacuation estimate developed by the Minnesota Department of Health.

REV 1 8/25/80 Page 5 Table i EVACUATION TIME ESTIMATES IN '111E AREA NEAR TIE PRAIRIE ISIAND NUCIEAR GE24El% TING PIRIP Evacuation Tine Evac Zone Sectors (minutes) Map Distance Degree Sectors Population Exist Routes Dest /Mverse/ Confirm P-1 0 - 2 miles 180 NW-ESE 238 Co Rd E 10/15/30 l P-2 0 - 2 miles 180 SE-WIW 111 Co Rd 18 10/15/30 l P-3 0 - 5 miles 90 NW-NNE 370 Co Rd E, 00, 0 20/30/60 l P-4 0 - 5 miles 90 NE-ESE 610 Co Rd E, 0, K 20/30/60 l P-5 0 - 5 miles 90 SE-SSW 2302 Co Rd 46, 53 40/50/100 l T.H.-61 T.H.-19 P-6 0 - 5 miles 90 SW-W W 378 Co Rd 46, 18 20/30/60 l T.H.-61 P-7 0 - 10 miles 90 NW-M E 2153 Co Rd E, QQ, Q, 80/100/200 l 4

00. O T.H.-10 P-8 0 - 10 miles 90 NE-ESE 4355 Co Rd K, V, C, 140/180/360 l

W,EE T.H.-35 T.H.-63 P-9 0 - 10 miles 90 SE-S9f 14,016 Co Rd 53, 1, 41 400/520/1040 l T.H.-61 T.H.-19 T.H.-58 P - 10 0 - 10 miles 90 SW-WW 1,790 CC..J 1 40/50/100 l T.H.-61 T.H.-316 T.H.-19 fD N M f f l % k li'iM!M MJQdAb) %*4 MEVI S/stj'so p f. _f' 7-gf 1 i 1l I i. rg t _ - _A_ ND. _g1 i c32_ N. ERA TWG i_M_.A_.N. s"O ?_' (._, '.'_ b__ Td 1SL v , h --hj[ l -1;sn W@ 9. /f J VT~~', 't ( ~ V. Q_d _ _L i, w E scS ' *,,f 8# Prescot f e pg ... j J g.j-- 4 J.LLSWOR .. I N ( w ortn' ET u +3 \\ GROVEL [t { // h j h DN ' [ %[ y ~ \\ r,, j p %W T ~d N' f_ 3* 7 f 1;[ W' 9 Nh [ l g p 4 yy_,._ ,hh s ,i (,.

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• 17500 P-lo BEST/ ADVERSE / CONFIRM POPULATION (See Table ) __ _

C ~ RE:V 1 8/25/80 Page 16 Appendix EVACUATION TIME ESTIMATES Prai-ie Island Nuclear Generatino Plant Exit Ibutes Vehicles / hour Capacity (VPHC) Minnesota Roads: Trunk Highway 61 (North) 1500 61 (South) 1300 Trunk Highway 19 1200 l l Trunk Highway 58 1200 l Trunk Highway 316 1200 County Roads 18 (West), 1 820 County Road 18 (North) 650 l County Roads 41, 46, 53 600 l Wisconsin Roads: Trunk Highway 10 1500 l Trunk Highway 35 1300 l Trunk Highway 63 1300 l County Roads E, Q 650 l County Roads C, 00, 0, K, V, W, QQ, EE 600 l l Vehicle Travel Rate: 10-15 nph 1 1 l 1 ---r ,,,--w - ~. ~ - - -, - -}}