ML18317A093

2018/11/13 Vogtle COL Docs - RAI Transmittal for Vogtle Units 3 and 4 LAR 18-017

ML18317A093
Person / Time
Site:	Vogtle
Issue date:	11/13/2018
From:	NRC
To:	NRC/NRO/DLSE/LB4
References
Download: ML18317A093 (10)

Text

Not Met not met not

The licensee is requested to consider making these clarifications.

the licensee is requested to consider replacing the phrase "isolate the affected flow path(s)" with "isolate both SFS containment penetration flow paths" in Required Actions B.1 and B.2.1, and replace "Verify the affected flow path is isolated" with "Verify both SFS containment penetration flow paths are isolated" in Required Action B

.2.2.However, since the Applicability of the Spent Fuel Pool Level

- Low 2 ESFAS Function can be exited by closing one or both ends of the fuel transfer tube, thereby ceasing "communication" between the water volumes of the spent fuel pool and the refueling cavity, the licensee is requested to consider adding this measure as alternative Required Action C.2.The associated Bases should explain whether this action would also (by itself) maintain the required combined water inventory of the refueling cavity and IRWST.The licensee is requested to explain whether irradiated fuel movement in containment and irradiated fuel movement in, and transfer to, the spent fuel transfer canal and spent fuel pool can continue provided the refueling cavity water level is 23 ft above the top of the reactor vessel flange (as required by Subsection 3.5.8 Required Action F.1), even though the SFS containment penetration flow paths are not isolated nor capable of being automatically isolated on a Spent Fuel Pool Level

- Low 2 Function generated ESF actu ation signal to close the three SFS CIVs. To meet Required Action F.2, the staff understands that loading a fuel assembly in the reactor vessel would not be allowed becaus e that would constitute a positive reactivity addition to the core.The licensee is requested to consider making these clarifications.

Therefore, the licensee is requested to change (i) proposed Subsection 3.7.13 by replacing the proposed SR 3.7.13.1 and as sociated Bases with the above explicit SRs and suitable associated Bases; and (ii) existing Subsection 3.3.16 by deleting SR 3.3.16.4 and associated Bases.

The licensee is reminded to update the proposed changes to the Bases that were provided in the LAR-18-017 Enclosure 3 to re flect the disposition and resolution of the above issues, as stated in Sub-questions 1, 2, 3, and 4.