ML24267A052

Standby Gas Treatment Planned Amendment Preapplication Meeting Presentation

ML24267A052
Person / Time
Site:	Quad Cities
Issue date:	09/24/2024
From:	Constellation Energy Generation
To:	Robert Kuntz NRC/NRR/DORL/LPL3
Kuntz R
References
EPID L-2024-LRM-0105
Download: ML24267A052 (1)

Text

• The SGT system at QCNPS consists of two fully redundant subsystems that are shared between Unit 1 and Unit 2, each with its own set of ductwork, damper s, charcoal filter train, and controls

• TS LCO 3.6.4.3 requires two SGT subsystems to be operable in Modes 1, 2, and 3, and during movement of recently irradiated fuel assemblies in the secondary containment

• Condition D applies with two SGT subsyste ms inoperable in Mode 1, 2, or 3

-Required Action D.1 is to restore one SGT subsystem to operable status, with a Completion Time of 1 hour1.157407e-5 days <br />2.777778e-4 hours <br />1.653439e-6 weeks <br />3.805e-7 months <br />

• If one SGT subsystem is not restored to operable status within 1 hour1.157407e-5 days <br />2.777778e-4 hours <br />1.653439e-6 weeks <br />3.805e-7 months <br />, Condition E requires both units to be in Mode 3 within the following 12 hours1.388889e-4 days <br />0.00333 hours <br />1.984127e-5 weeks <br />4.566e-6 months <br />

• Proposed license amendment request adds a Note to the Completion Time for Condition D that states:

Or 14 days, to support the rehabilitation of the 24-inch SGT common discharge line pipe section. The 14 day extended period shall only be used once and may not be used after May 31, 2026. During the extended period, the temporary discharge line that routes the SGT system exhaust through the T urbine Building exhaust ventilation duct, that is described in Attachment 1 of letter RS-24-xxx dated October xx, 2024, shall be in service, except when initially connecting the temporary discharge line and again when restoring the original configuration. If the temporary discharge line becomes unavailable at any time during the extended period, the Required Action is to restore the temporary discharge line within 24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br /> or enter Condition E.Proposed License Amendment Request 11