ML23088A132

Response to Request for Additional Information Regarding Results of Steam Generator Tube In-Service Inspection

ML23088A132
Person / Time
Site:	Callaway
Issue date:	03/29/2023
From:	Ameren Missouri, Union Electric Co
To:	Office of Nuclear Reactor Regulation
Shared Package
ML23088A130	List: ML23088A132 ULNRC-06803, Submittal of Response to Request for Additional Information Regarding Results of Steam Generator Tube In-Service Inspection
References
EPID L-2022-LRO-0143, ULNRC-06803
Download: ML23088A132 (1)

Text

Enclosure to ULNRC-06803 Page 1 of 7 Response to Request for Additional Information Callaway Plant, Unit 1 -

SG Inspection Report Review EPID: L-2022-LRO-0143 on November 1, 2022 (ULNRC-06773, Results ofSteam Generatorlube In-Service Inspection ML22305A680) Union Electric Company, dba Ameren Missouri, submitted information summarizing the spring 2022 steam generator (SG) tube inspections performed at Callaway Plant, Unit 1, during refueling outage 25. Callaway Plant, Unit 1 Technical Specification (TS) Section 5.6.10, Steam Generator Tube Inspection Report, requires that a report shall be submitted within 180 days after the initial entry into MODE 4 following completion of an inspection performed in accordance with TS Section 5.5.9, Steam Generator (SG) Program Subpart c.2 of 5.6.10 states that the report shall include the location, orientation (if linear), measured size (if available), and voltage response for each indication. For tube wear at support structures less than 20 percent through-wall, only the total number of indications needs to be reported.

Req uest:

To complete its review of the inspection report, the NRC staff requests the following additional information:

In the SG Tube Inspection Report submitted on November 1, 2022, Table 5 indicates the presence of tube support plate wear indications in SGs B and C that were greater than or equal to 20 percent through-wall in depth. Please provide the location, orientation (if linear), measured size (if available),

and voltage response for these indications.

Response

SG B and SG C each contain one indication of tube support plate wear of greater than or equal to 20 percent through-wall in depth. The following two attachments provide additional details pertaining to these indications, including the requested information.

to Enclosure of ULNRC-06803 Page 1 of 3 Callaway Plant Unit 1 Steam Generator B TSP Wear Indications 20% 39% -

Refuel Outage 25, April 2022 2 pages follow this cover sheet

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Framatome Inc 05/04/22 09:41:34 Customer: Ameren Plant: Callaway Unit: 1 Component: S/G B Page 2 of 2 TSP Wear 20% 39%

QUERY: QueryMl{1] .qry ROW COL VOLTS 0EG CHAN 1N0 %TW LOCATION EXT EXT UTIL 1 UTIL 2 UTIL 3 CAL LEG PROBE lOX 89 59 0.28 136 94 TWO 20 05H +0.35 TEC TEE 6 HOT 610H5 1141 Total Tubes  : 1 Total Records: 1 to Enclosure of ULNRC-06803 Page 1 of 3 Callaway Pla nt U nit 1 Stea m Generator C Tsp Wear Indications 20% 39% -

Refuel Outage 25, April 2022 2 pages follow this cover sheet

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Frainatcme Inc 05/04/22 09:46:02 Customer: Aznenn Plant: Callavay Unit: 1 Cerponent: S/G C Page 2 of 2 TSP Wear 20% 39%

QUERY: Querylil[1] .qry ROW COL VOLTS DEC CRAW IND %TW LOCATION ECT CT UTIL 1 UTIL 2 UTIL 3 CAL LEG PROBE lOX 112 60 0.33 124 P4 P1W 23 04C +0.46 TEC TEE 2 HOT 61055 1566 Total Tithes  : 1 Total Records : 1