NL-22-0977, License Amendment Request to Modify Technical Specification 5.5.11.c Acceptance Criteria for Charcoal Filter Testing: Difference between revisions

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Latest revision as of 07:11, 21 February 2026

License Amendment Request to Modify Technical Specification 5.5.11.c Acceptance Criteria for Charcoal Filter Testing
ML23040A432
Person / Time
Site: Vogtle  
Issue date: 02/09/2023
From: Gayheart C
Southern Nuclear Operating Co
To:
Office of Nuclear Reactor Regulation, Document Control Desk
References
NL-22-0977
Download: ML23040A432 (1)
v • d • e


Text

Cheryl A. Gayheart Regulatory Affairs Director 3535 Colonnade Parkway Birmingham, AL 35243 205 992 5316 cagayhea@southernco.com February 9, 2023 NL-22-0977 10 CFR 50.90 Docket Nos. 50-424, 50-425 U. S. Nuclear Regulatory Commission ATTN: Document Control Desk Washington, D. C. 20555-0001 Vogtle Electric Generating Plant - Units 1 & 2 License Amendment Request to Modify Technical Specification 5.5.11.c Acceptance Criteria for Charcoal Filter Testing Pursuant to 10 CFR 50.90, Southern Nuclear Operating Company (SNC) hereby requests a license amendment to Vogtle Electric Generating Plant (VEGP) Units 1 and 2 renewed facility operating licenses NPF-68 and NPF-81, respectively.

The proposed change would revise technical specifications (TS) 5.5.11, Ventilation Filter Testing Program (VFTP). Specifically, the charcoal adsorber penetration acceptance criteria for the Control Room Emergency Filtration System (CREFS), item number 5.5.11.c would be revised from 0.2% to 0.5%.

The Enclosure provides an evaluation of the proposed change. Attachment 1 provides the existing TS pages marked up to show the proposed change. Attachment 2 provides the revised TS pages. There are no TS Bases changes associated with this license amendment request.

Approval of the proposed amendment is requested within one year from the date of NRC acceptance of this submittal. Implementation of the approved amendment will be implemented within 180 days of approval.

In accordance with 10 CFR 50.91, SNC is notifying the State of Georgia of this license amendment request by transmitting a copy of this letter and enclosures to the designated State Official.

This letter contains no regulatory commitments. If you have any questions, please contact Amy Chamberlain at 205.992.6361.

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Programs and Manuals 5.5 (continued)

Vogtle Units 1 and 2 5.5-12 Amendment No. (Unit 1)

Amendment No. (Unit 2) 5.5 Programs and Manuals 5.5.11 Ventilation Filter Testing Program (VFTP) (continued)

ESF Ventilation System Flow Rate CREFS 19,000 CFM PPAFES 15,500 CFM

c.

Demonstrate for each of the ESF systems that a laboratory test of a sample of the charcoal adsorber, when obtained as described in Regulatory Guide 1.52, Revision 2, shows the methyl iodide penetration less than or equal to the value specified below when tested in accordance with ASTM D3803-1989 at a temperature of 30°C and greater than or equal to the relative humidity specified below.

ESF Ventilation System Penetration RH CREFS

.5%

70%

PPAFES 10%

95%

d.

Demonstrate for each of the ESF systems that the pressure drop across the combined HEPA filters, the charcoal adsorbers, and CREFS cooling coils is less than the value specified below when tested in accordance with Regulatory Guide 1.52, Revision 2, and ASME N510-1989 at the system flow rate specified below +/- 10%.

ESF Ventilation System Delta P Flow Rate CREFS 7.1 in.

19,000 CFM water gauge PPAFES 6 in.

15,500 CFM water gauge

e.

Demonstrate that the heaters for the CREFS dissipate t 95 kW when corrected to 460 V when tested in accordance with ASME N510-1989.

The provisions of SR 3.0.2 and SR 3.0.3 are applicable to the VFTP test frequencies.

5.5.12 Explosive Gas and Storage Tank Radioactivity Monitoring Program This program provides controls for potentially explosive gas mixtures contained in the Gaseous Waste Processing System, the quantity of radioactivity contained in each Gas Decay Tank, and the quantity of radioactivity contained in

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