ML13239A251

Providing Revised Evacuation Time Estimates

ML13239A251
Person / Time
Site:	Sequoyah
Issue date:	08/16/2013
From:	James Shea Tennessee Valley Authority
To:	Document Control Desk, Office of Nuclear Reactor Regulation
References
Download: ML13239A251 (5)

Text

Tennessee Valley Authority, 1101 Market Street, Chattanooga, Tennessee 37402 August 16, 2013 10 CFR 50.4 10 CFR 50, Appendix E ATTN: Document Control Desk U.S. Nuclear Regulatory Commission Washington, D.C. 20555-0001 Sequoyah Nuclear Plant, Units 1 and 2 Facility Operating License Nos. DPR-77 and DPR-79 NRC Docket Nos. 50-327 and 50-328

Subject:

Sequoyah Nuclear Plant Units I and 2 - Revised Evacuation Time Estimates

References:

1. Tennessee Valley Authority letter to NRC, "Evacuation Time Estimates," dated December 18, 2012 (ML12362A475)

2. Tennessee Valley Authority letter to NRC, "Evacuation Time Estimates Checklist," dated March 4, 2013 (ML13070A023)

3. NUREG/CR-7002, "Criteria for Development of Evacuation Time Estimate Studies," published November 2011 (ML113010515)

The purpose of this correspondence is to provide revised evacuation time estimates as requested by the Nuclear Regulatory Commission (NRC).

By letter dated December 18, 2012 (Reference 1), Tennessee Valley Authority (TVA) provided the analysis supporting Evacuation Time Estimates (ETE) for Sequoyah Nuclear Plant (SQN).

By letter dated March 4, 2013 (Reference 2), TVA provided the ETE review criteria checklist from Appendix B of NUREG/CR-7002 "Criteria for Development of Evacuation Time Estimate Studies," (Reference 3), requested by the NRC in a telephone call on February 1, 2013.

In a June 6, 2013 teleconference, NRC provided specific comments to TVA regarding the December 2012 (Reference 1) ETE submittal. As a result, TVA's ETE submittals were revised. to this letter provides a summary table of TVA responses to the specific NRC comments on TVA's 2012 ETE submittals provided in the June 6, 2013 teleconference.

Prnted on -eycled paper

U.S. Nuclear Regulatory Commission Page 2 August 16, 2013 to this letter provides the revised Evacuation Time Estimates for Sequoyah Nuclear Power Plant Plume Exposure Pathway Emergency Planning Zone. to this letter provides a copy of the completed ETE review criteria checklist for the revised evacuation time estimates.

There are no new regulatory commitments in this letter. Should you have any questions or if additional information is needed regarding this submittal, please contact Walter H. Lee, Senior Emergency Preparedness Manager, at (423) 751-8577.

J. W. Shea Vice President, Nuclear Licensing

Enclosures:

1. Comments and Responses to NRC Comments on TVA 2012 ETE Submittals

2. Evacuation Time Estimates for Sequoyah Nuclear Power Plant Plume Exposure Pathway Emergency Planning Zone

3. Table B-1 ETE Review Criteria Checklist - Sequoyah cc (Enclosures):

NRC Regional Administrator - Region II NRC Senior Resident Inspector - Sequoyah Nuclear Plant

Enclosure I Tennessee Valley Authority Sequoyah Nuclear Plant Units I and 2 Comments and Responses to NRC Comments on TVA 2012 ETE Submittals

Comments and Responses to NRC Comments on TVA 2012 ETE Submittals No Site Comment Response 1 General Disabled and bed-ridden population not Table 1-3 of all 3 projects have been (all 3 sites) adequately addressed. Real or estimated updated to reflect the disabled and bed-numbers should be provided, ridden population Sections 2.1 and 3.1.2 have been updated with disabled/bed-ridden population assumptions and information 2 General No summary table for total number of Section 3.6 and Table 3-5 have been (all 3 sites) available buses, ambulances or other added to address the transportation transport methods. resources and demand for buses, ambulances or other transport methods.

3 Sequoyah Transit Dependent in Table 1 Total Table 1-3 has been updated and also number of estimated buses should be supporting text in Section 3.1.2 revised based on 30 people per bus or 50% of the stated seating capacity as noted in the NRC guidance.

4 Sequoyah Section 6.8- 3-hour to start evacuating This section has been re-written to transit-dependent (allowing time for include more explanation and majority of school buses to return) should justification.

be revised as Table 6-8 shows that the majority of schools have ETEs of more than 3 hours3.472222e-5 days <br />8.333333e-4 hours <br />4.960317e-6 weeks <br />1.1415e-6 months <br />.

5 Browns Transit Dependent in Table 1 Table 1-3 has been updated and also Ferry Population and bus numbers should be supporting text in Section 3.1.2 estimated based on NRC's guidance (1.5% of permanent population) or a justification should be provided for the current numbers provided in the table.

6 Browns Section 6.7 - Trip departure/preparation This section has been re-written to Ferry time assumption (2 hours2.314815e-5 days <br />5.555556e-4 hours <br />3.306878e-6 weeks <br />7.61e-7 months <br />) for transit- include more explanation and dependent should be justified or justification.

explained better.

7 Watts Bar Transit Dependent in Table 1 Table 1-3 has been updated and also Population and bus numbers should be supporting text in Section 3.1.2 estimated based on NRC's guidance (1.5% of permanent population) or a justification should be provided for the current numbers provided in the table.

8 Watts Bar Section 6.8 - Trip departure/preparation This section has been re-written to time assumption (2 hours2.314815e-5 days <br />5.555556e-4 hours <br />3.306878e-6 weeks <br />7.61e-7 months <br />) for transit- include more explanation and dependent should be justified or revised justification.

to be consistent with the other sites.

Enclosure 1-1

Enclosure 2 Tennessee Valley Authority Sequoyah Nuclear Plant Units 1 and 2 Evacuation Time Estimates for Sequoyah Nuclear Power Plant Plume Exposure Pathway Emergency Planning Zone