NL-13-0634, Evacuation Time Estimate Update

Evacuation Time Estimate Update

ML13088A036
Person / Time
Site:	Hatch, Vogtle, Farley
Issue date:	03/28/2013
From:	Pierce C Southern Co, Southern Nuclear Operating Co
To:	Document Control Desk, Office of Nuclear Reactor Regulation
References
NL-13-0634
Download: ML13088A036 (8)

Text

Charles R. Pierce Southern Nuclear Regulatory AHairs Director Operating Company. Inc.

40 Inverness Center Parkway Post Office Box 1295 Birmingham, Alabama 35201 Tel 205 9927872 Fax 2059927601 SOUIHERN ' \

March 28, 2013 COMPANY Docket Nos.: 50-348 50-321 50-424 NL-13-0634 50-364 50-366 50-425 U. S. Nuclear Regulatory Commission AnN: Document Control Desk Washington, D. C. 20555-0001 Joseph M. Farley Nuclear Plant - Units 1 & 2 Edwin I. Hatch Nuclear Plant - Units 1 & 2 Vogtle Electric Generating Plant - Units 1 & 2 Evacuation Time Estimate Update

References:

1. Southern Nuclear Operating Company letter NL-12-2329 to the NRC, Joseph M. Farley Nuclear Plant - Units 1 and 2, Evacuation Time Estimate Update, dated December 7,2012

2. Southern Nuclear Operating Company letter NL-12-2330 to the NRC, Edwin I. Hatch Nuclear Plant - Units 1 and 2, Evacuation Time Estimate Update, dated December 7, 2012

3. Southern Nuclear Operating Company letter NL-12-2331 to the NRC, Vogt/e Electric Generating Plant - Units 1 and 2, Evacuation Time Estimate Update, dated December 7, 2012 Ladies and Gentlemen:

During the Nuclear Regulatory Commission (NRC) review of the above referenced Southern Nuclear Operating Company submittals, it was identified that additional information was needed regarding Section 8, "Sensitivity Study on Population Change," for each submittal. In addition, it was identified that the statement in the Section 8 Sensitivity Study regarding the NRC's review and approval of the 2012 Evacuation Time Estimate (ETE) study should be removed .

Enclosures 1, 2, and 3 provide an updated copy of Section 8, Sensitivity Study on Population Change, for Joseph M. Farley Nuclear Plant - Units 1 and 2 (FNP),

Edwin I. Hatch Nuclear Plan - Units 1 and 2 (HNP), and Vogtle Electric Generating Plant - Units 1 and 2 (VEGP), respectively.

U. Nuclear Regulatory Commission NL-1 ,rv,u...,..,.

Page 2 This letter contains no NRC commitments. If you have any questions, contact Ken McElroy (205) 992-7369.

Respectfully submitted,

t. t{ lZ.

C. R. Pierce Regulatory Affairs Director CRP/RMJ/lac

1. FNP Section 8, Sensitivity Study on Population Change Revised HNP Section 8, Sensitivity Study on Population Change Revised Section 8, Sensitivity Study on Population Change cc: Southern Nuclear Operating Company Mr. Kuczynski, Chairman, President & CEO Mr. D. Bast, Executive Vice President & Chief Nuclear Officer Mr. T. Lynch, Vice President - Farley Mr. D. Madison, Vice President - Hatch Mr. E. Tynan, Vice President - Vogtle Mr. L. Ivey, Vice President - Regulatory Affairs Mrs. Reister, Emergency Preparedness Manager RType: CFA04.054; CHA02.004; CVC7000 Mr. V. M. McCree, Regional Administrator Mr. E. Martin, NRR Project Manager - Hatch, Vogtle Mr. D. Morris, Resident Inspector - Hatch Mr. L. M. Cain, Senior Resident Inspector - Vogtle Ms. E. A. Brown, NRR Project Manager - Farley Mr. K~ Niebaum, . . . or"......

Mr. J. R. Sowa, Senior Resident Inspector - Farley Georgia Emergency Management Agency Mr. S. Clark, Radiological Emergency Planning Program Director South Carolina Office of the Adiutant General Emergency Management Mr. N. Nienhius, Fixed Nuclear Facility Coordinator

Joseph M. Nuclear Plant - Units 1 & 2 Edwin I. Hatch Nuclear Plant - Units 1 & 2 Vogtle Generating Plant - 1&2 Estimate Enclosure 1 Revised FNP Section 8, Sensitivity Study on Population Change

EVACUATION TIME ESTIMATES FOR THE JOSEPH M. FARLEY NUCLEAR PLANT 8.0 SENSITIVITY STUDY ON POPULATION CHANGE ETEs vary with factors such as population, roadway networks and vehicle occupancy rates. In response to new federal regulations, IEM conducted a population sensitivity analysis for FNP to address the uncertainty in population data by estimating the anticipated impact of a population change on ETEs. This sensitivity analysis wiJi provide a basis for decisions on future ETE update thresholds.

IEM increased the residential population (for both EPZ and shadow evacuees) to determine the population value that will cause ETE values to increase by 25 percent or 30 minutes, whichever is less for the scenario with the longest ETE. This scenario is evacuating the entire EPZ during the weekday under adverse weather conditions. The base ETE for this scenario is 200 minutes, and hence the threshold for triggering an ETE update is a 30 minute increase in the ETE. IEM found that an increase of 30 minutes occurs with a permanent resident population increase of 161 % or 6,409 people within the EPZ (along with the increase of shadow evacuees with the same percentage).

IEM 2012 Page 69

Joseph M. Farley Nuclear - Units 1 & 2 I. Hatch Nuclear Plant Units 1 & 2 Vogtle Electric Generating - Units 1 & 2 Evacuation Time Update Enclosure 2 HNP Section 8, Sensitivity Study on Population Change

EVACUATION TIME ESTIMATES FOR THE EDWIN I. HATCH NUCLEAR PLANT 8.0 SENSITIVITY STUDY ON POPULATION CHANGE ETEs vary with factors such as population, roadway networks and vehicle occupancy rates. In response to new federal regulations, IEM conducted a population sensitivity analysis for HNP to address the uncertainty in population data by estimating the anticipated impact of a population change on ETEs. This sensitivity analysis will provide a basis for decisions on future ETE update thresholds.

IEM increased the residential population (for both EPZ and shadow evacuees) to determine the population value that will cause ETE values to increase by 25 percent or 30 minutes, whichever is less for the scenario with the longest ETE. This scenario is evacuating the entire EPZ during the weekend under adverse weather conditions. The base ETE for this scenario is 235 minutes, and hence the threshold for triggering an ETE update is a 30 minute increase in the ETE. IEM found that an increase of 30 minutes occurs with a permanent resident population increase of 40% or 3,444 people within the EPZ (along with the increase of shadow evacuees with the same percentage).

IEM 2012 Page 65

Joseph M. Nuclear Plant - Units 1 & 2 Edwin I. Hatch Nuclear Plant - 1&2 Vogtle Generating Plant - 1&2 Evacuation Time Estimate Update Enclosure 3 nt;!vls.t;!u VEGP Section 8, Sensitivity Study on Population Change

EVACUATION TIME ESTIMATES FOR THE VOGTLE ELECTRIC GENERATING PLANT

!s.o SENSITIVITY STU DY ON POPULATION CHANGE ETEs vary with the factors such as population, roadway networks and vehicle occupancy rates. In response to new federal regulations, IEM conducted a population sensitivity analysis for VEGP to address the uncertainly in population data by estimating the anticipated impact of a population change on ETEs . This sensitivity analysis will provide a basis for decisions on future ETE update thresholds.

IEM increased the residential population (for both EPZ and shadow evacuees) to determine the population value that will cause ETE values to increase by 25 percent or 30 minutes, whichever is less for the scenario with the longest ETE. This scenario is evacuating the entire EPZ during the weekend under adverse weather conditions. The base ETE for this scenario is 205 minutes, and hence the threshold for triggering an ETE update is a 30 minute increase in the ETE. !EM found that an increase of 30 minutes occurs with a permanent resident population increase of 278 % or 8,671 people within the EPZ (along with the increase of shadow evacuees wjth the same percentage) .

IEM 2012 Page 61