CNL-18-051, Correction to Application to Revise Watts Bar Unit 2 Technical Specification 4.2.1, Fuel Assemblies, and Watts Bar Units 1 and 2 Technical Specifications Related to Fuel Storage (WBN-TS-17-028)

Correction to Application to Revise Watts Bar Unit 2 Technical Specification 4.2.1, Fuel Assemblies, and Watts Bar Units 1 and 2 Technical Specifications Related to Fuel Storage (WBN-TS-17-028)

ML18100A953
Person / Time
Site:	Watts Bar
Issue date:	04/09/2018
From:	James Shea Tennessee Valley Authority
To:	Document Control Desk, Office of Nuclear Reactor Regulation
References
CNL-18-051, WBN-TS-17-028
Download: ML18100A953 (5)

Text

1101 Market Street, Chattanooga, Tennessee 37402 CNL-18-051 April 9, 2018 10 CFR 50.90 ATTN: Document Control Desk U.S. Nuclear Regulatory Commission Washington, D.C. 20555-0001 Watts Bar Nuclear Plant, Units 1 and 2 Facility Operating License Nos. NPF-90 and NPF-96 NRC Docket Nos. 50-390 and 50-391

Subject:

Correction to Application to Revise Watts Bar Unit 2 Technical Specification 4.2.1, "Fuel Assemblies, and Watts Bar Units 1 and 2 Technical Specifications Related to Fuel Storage (WBN-TS-17-028)

References:

1. TVA Letter to NRC, CNL-17-144, Application to Revise Watts Bar Unit 2 Technical Specification 4.2.1, Fuel Assemblies, and Watts Bar Units 1 and 2 Technical Specifications Related to Fuel Storage (WBN-TS-17-028), dated December 20, 2017 (ML17354B282)

2. TVA Letter to NRC, CNL-18-018, Supplement to Application to Revise Watts Bar Unit 2 Technical Specification 4.2.1, Fuel Assemblies, and Watts Bar Units 1 and 2 Technical Specifications Related to Fuel Storage (WBN-TS-17-028), dated February 15, 2018 (ML18047A181)

In Reference 1, Tennessee Valley Authority (TVA) submitted a request for amendments to Facility Operating License Nos. NPF-90 and NPF-96 for the Watts Bar Nuclear Plant (WBN),

Units 1 and 2. The proposed change revises WBN Unit 2 Technical Specification (TS) 4.2.1, "Fuel Assemblies," to allow TVA to insert Tritium Producing Burnable Absorber Rods (TPBARs) into the WBN Unit 2 reactor core, similar to WBN Unit 1, and to add a limit on the TPBARs that can be irradiated. In Reference 2, TVA provided a supplement to Reference 1.

U.S. Nuclear Regulatory Commission CNL- 18-051 Page 2 April 9, 2018 TVA identified the following errors in Enclosure 1 to Reference 1 regarding Table 4.1-32, "Gaseous Releases , Continuous Filtered Containment Vent Option, " and Table 4.1-35, "Annual Projected Impact of TPC (1 ,792 TPBARs) on Effluent Dose to Maximally Exposed Members of the Public and Population Dose per Unit":

• In Table 4.1-32 to Enclosure 1 to Reference 1, for nuclide Xe-131 m, the expected release value was listed as 1.19E+01 Ci/year and for nuclide 1-132, the design release value was listed as 1.33E-13 µCi/cc. The correct values are 1.19E+03 Ci/year for Xe-131m and 1.33E-12 µCi/cc for 1-132.

• In Table 4.1-35 to Enclosure 1 to Reference 1, the maximally exposed individual organ non-tritium production core (TPC) dose was listed as 5.54 millirem (mrem) (Bone) , the TPC dose was listed as 6.14 mrem (Bone) , and the incremental increase from TPC was listed as 0.60 mrem. The correct values are 8.09 mrem (Thyroid) for the non-TPC dose, 8.30 mrem (Thyroid) for the TPC dose, and 0.21 mrem for the incremental increase from TPC .

The above errors were due to an oversight when reviewing the computer data used to generate Tables 4.1-32 and 4.1-35. The enclosure to this letter contains the corrected Tables 4.1-32 and 4.1-35 that supersede Tables 4.1-32 and 4.1-35 provided in Enclosure 1 to Reference 1.

TVA has entered this error into the TVA Corrective Action Program . Furthermore, TVA has reviewed the remaining data in Tables 4.1-32 and 4.1-35 and determined they are correct.

As an extent of condition , TVA reviewed the data in Tables 4.1-28, 4.1-29, 4.1-30, 4.1-31, 4 .1-33, 4.1-34, and 4.1-36 in Enclosure 1 to Reference 1 and determined that the information in these tables is correct.

The enclosure to this letter does not change the no significant hazards consideration or the environmental considerations contained in the referenced letter. Additionally , in accordance with 10 CFR 50.91 (b)(1 ), TVA is sending a copy of this letter and the enclosures to the Tennessee Department of Environment and Conservation.

There are no new regulatory commitments made in this letter. Please address any questions regarding this request to Edward D. Schrull at (423) 751-3850.

I declare under penalty of perjury that the foregoing is true and correct. Executed on this 9th da of April 2018 .

. Shea V1 e President, Nuclear Regulatory Affairs and Support Services Enclosure cc: See Page 3

U.S. Nuclear Regulatory Commission CNL-18-051 Page 3 April 9, 2018

Enclosure:

Corrected Table 4.1-32, Gaseous Releases, Continuous Filtered Containment Vent Option and Corrected Table 4.1-35, Annual Projected Impact of TPC (1,792 TPBARs) on Effluent Dose to Maximally Exposed Members of the Public and Population Dose per Unit cc (Enclosure):

NRC Regional Administrator - Region II NRC Resident Inspector - Watts Bar Nuclear Plant NRC Project Manager - Watts Bar Nuclear Plant Director, Division of Radiological Health - Tennessee State Department of Environment and Conservation

Enclosure Corrected Table 4.1-32, Gaseous Releases, Continuous Filtered Containment Vent Option Expected 10CFR20 Single Unit Dual Unit Des/Exp Design Design Nuclide Release (ECL, Operation Operation Ratio (Ci/year) (µCi/cc)

(Ci/year) µCi/cc) C/ECL C/ECL Kr-85m 1.16E+01 1.21E+01 1.41E+02 6.38E-11 1.00E-07 6.38E-04 1.28E-03 Kr-85 6.79E+02 3.40E+01 2.31E+04 1.05E-08 7.00E-07 1.49E-02 2.99E-02 Kr-87 6.55E+00 7.36E+00 4.82E+01 2.19E-11 2.00E-08 1.09E-03 2.19E-03 Kr-88 1.55E+01 1.22E+01 1.89E+02 8.58E-11 9.00E-09 9.54E-03 1.91E-02 Xe-131m 1.19E+03 2.92E+00 3.47E+03 1.57E-09 2.00E-06 7.87E-04 1.57E-03 Xe-133m 5.05E+01 4.29E+01 2.17E+03 9.82E-10 6.00E-07 1.64E-03 3.27E-03 Xe-133 3.27E+03 1.11E+02 3.62E+05 1.64E-07 5.00E-07 3.28E-01 6.56E-01 Xe-135m 5.23E+00 4.96E+00 2.60E+01 1.18E-11 4.00E-08 2.94E-04 5.89E-04 Xe-135 1.11E+02 6.89E+00 7.64E+02 3.47E-10 7.00E-08 4.95E-03 9.90E-03 Xe-138 4.82E+00 5.38E+00 2.60E+01 1.18E-11 2.00E-08 5.88E-04 1.18E-03 Br-84 5.60E-02 2.49E+00 1.39E-01 6.31E-14 8.00E-08 7.89E-07 1.58E-06 I-131 1.70E-01 5.39E+01 9.16E+00 4.15E-12 2.00E-10 2.08E-02 4.15E-02 I-132 7.38E-01 3.98E+00 2.94E+00 1.33E-12 2.00E-08 6.66E-05 1.33E-04 I-133 4.99E-01 2.72E+01 1.36E+01 6.16E-12 1.00E-09 6.16E-03 1.23E-02 I-134 1.19E+00 1.63E+00 1.94E+00 8.80E-13 6.00E-08 1.47E-05 2.93E-05 I-135 9.19E-01 7.94E+00 7.30E+00 3.31E-12 6.00E-09 5.52E-04 1.10E-03 Cs-134 2.27E-03 4.18E+01 9.48E-02 4.30E-14 2.00E-10 2.15E-04 4.30E-04 Cs-136 8.01E-05 1.70E+02 1.36E-02 6.16E-15 9.00E-10 6.85E-06 1.37E-05 Cs-137 3.48E-03 1.58E+02 5.49E-01 2.49E-13 2.00E-10 1.24E-03 2.49E-03 Cr-51 5.92E-04 3.00E-01 1.77E-04 8.04E-17 3.00E-08 2.68E-09 5.36E-09 Mn-54 4.31E-04 4.82E-01 2.08E-04 9.41E-17 1.00E-09 9.41E-08 1.88E-07 Fe-59 7.70E-05 3.58E+00 2.76E-04 1.25E-16 5.00E-10 2.50E-07 5.00E-07 Co-58 2.32E-02 5.53E+00 1.28E-01 5.82E-14 1.00E-09 5.82E-05 1.16E-04 Co-60 8.74E-03 1.42E+00 1.24E-02 5.63E-15 5.00E-11 1.13E-04 2.25E-04 Sr-89 2.98E-02 2.31E+01 6.88E-02 3.12E-14 1.00E-09 3.12E-05 6.24E-05 Sr-90 1.14E-03 1.38E+01 1.58E-02 7.14E-15 6.00E-12 1.19E-03 2.38E-03 Zr-95 1.00E-03 1.75E+00 1.75E-03 7.96E-16 4.00E-10 1.99E-06 3.98E-06 Nb-95 2.45E-03 2.41E+00 5.91E-03 2.68E-15 2.00E-09 1.34E-06 2.68E-06 Ba-140 4.00E-04 3.23E-01 1.29E-04 5.86E-17 2.00E-09 2.93E-08 5.86E-08 H-3 1.39E+02 1.00E+00 1.39E+02 6.30E-11 1.00E-07 6.30E-04 1.26E-03 H-3 (TPC) 1.04E+03 1.00E+00 1.04E+03 4.69E-10 1.00E-07 4.69E-03 9.39E-03 C-14 1.12E+01 1.00E+00 1.12E+01 5.08E-12 3.00E-09 1.69E-03 3.39E-03 Ar-41 3.40E+01 1.00E+00 3.40E+01 1.54E-11 1.00E-08 1.54E-03 3.08E-03 Total 3.97E-01 7.94E-01 Total (TPC) 4.01E-01 8.02E-01 CNL-18-051 E1 of 2

Enclosure Corrected Table 4.1-35, Annual Projected Impact of TPC (1,792 TPBARs) on Effluent Dose to Maximally Exposed Members of the Public and Population Dose per Unit Incremental NRC Annual Non-TPC TPC Increase from Effluent Exposure Dose Dose TPC Guideline Annual Radioactive Gaseous Emissions Maximally Exposed Individual 5.00 0.63 0.63 0 (mrem) Total Body Total Body Maximally Exposed Individual 15.00 8.09 (Thyroid) 8.30 (Thyroid) 0.21 (mrem) Organ Any Organ 50-mile Population Dose 11.3 (Thyroid) 16.9 (Thyroid) 5.6 NA (person-rem)

Annual Radioactive Liquid Emissions Maximally Exposed Individual 3.00 0.34 0.37 0.03 (mrem) Total Body Total Body Maximally Exposed Individual 10.00 0.47 (Liver) 0.49 (Liver) 0.02 (mrem) Organ Any Organ 50-mile Population Dose 6.9 (Thyroid) 11.0 (Thyroid) 4.1 NA (person-rem)

CNL-18-051 E2 of 2