ML16257A020

Presentation Slides from Watts Bar, Unit 2, TVA Public Meeting to Discuss Tritium Production Planning

ML16257A020
Person / Time
Site:	Watts Bar
Issue date:	09/13/2016
From:	Burzynski M Tennessee Valley Authority
To:	Office of Nuclear Reactor Regulation
Schaaf R, NRR/DORL/LPLII-2, 415-6020
References
Download: ML16257A020 (9)

Text

Watts Bar Unit 2 Tritium Production Planning Discussion Mark Burzynski September 13, 2016

Agenda Introduction and Background Project Scope Licensing Strategy Licensing Schedule Closing Watts Bar Unit 2 Tritium Production Plans l September 13, 2016 l 2

Introduction and Background (1/2)

Tritium Production Program Watts Bar Unit 1 tritium production began in October 2003 Department of Energy (DOE) identified the need to expand production which requires a second reactor In December 2015, DOE notified TVA of future tritium needs In June 2016, TVA agreed to assess potential for tritium production for Watts Bar Unit 2 Watts Bar Unit 2 Tritium Production Plans l September 13, 2016 l 3

Introduction and Background (2/2)

Watts Bar tritium production target Steady ramp-up of tritium production to approximately 2800 grams every 18 months by December 2025 Current production is less than 700 grams per fuel cycle with 704 TPBARS in Unit 1 July 2016 Unit 1 license amendment authorized 1792 TPBAR production Unit 2 tritium production would need to begin in Cycle 4 (currently scheduled to begin November 2020)

Watts Bar Unit 2 Tritium Production Plans l September 13, 2016 l 4

Project Scope Plant Modifications Replace seven CCS and ERCW relief valves Add reverse osmosis unit to Liquid Radwaste System Replace Upper Compartment Coolers (contingency)

TVA Engineering Documentation Westinghouse analyses PNNL engineering documentation Holtec analyses License Amendment Request to operate with 1792 TPBARs at Watts Bar Unit 2 Watts Bar Unit 2 Tritium Production Plans l September 13, 2016 l 5

Licensing Strategy (1/2)

Key planning assumptions based on Watts Bar Unit 1 precedents Unit 2 LAR would address 17 plant-specific interface items from NUREG 1672 Safety Evaluation Report for DOE Tritium Production Core Topical Report Address post-LOCA subcriticality No update to DOE Topical Report would be made No Environment Impact Statement would be required Effect on thermal conductivity degradation would be treated in same manner as for Unit 1 PAD4TCD licensing issue for Unit 2 License Condition would not be coupled with Unit 2 TPBAR LAR Watts Bar Unit 2 Tritium Production Plans l September 13, 2016 l 6

Licensing Strategy (2/2)

Lessons learned from Unit 1 and emergent industry issues will be incorporated New effluent assessments will address effect of two unit tritium production on liquid waste management Needs to be developed for two-unit operation and credit additional release dilution flow and reverse osmosis unit decontamination Reactor vessel fluence evaluations will address issues documented in RIS 2014-11 Rack criticality analyses will address lessons learned from NEI 12-16 and GL 2016-01 Watts Bar Unit 2 Tritium Production Plans l September 13, 2016 l 7

Licensing Schedule Watts Bar Unit 2 Tritium Production Plans l September 13, 2016 l 8

Closing Based on DOE need to expand tritium production, TVA agreed to assess potential for tritium production at Watts Bar Unit 2 A LAR is scheduled to be submitted in November 2017 requesting approval to operate with 1792 TPBARs at Watts Bar Unit 2 Watts Bar Unit 2 Tritium Production Plans l September 13, 2016 l 9