ML23086B917

Steam Generator Tube Inspection Report for the Fall 2022 Refueling Outage

ML23086B917
Person / Time
Site:	Surry
Issue date:	03/24/2023
From:	Denise Wilson Virginia Electric & Power Co (VEPCO)
To:	Office of Nuclear Reactor Regulation, Document Control Desk
References
23-020
Download: ML23086B917 (1)

Text

Serial No.23-020 Attachment 1 Docket No. 50-280 page 11 of 28

Table 4: Summary of Non-A VB Wear Volumetric Degradation

Max Axial Circ Foreign Depth Length Length Initially Object In Situ Plugged &

SG Row Col Location ETSS Volts (%TW) (in) (in) Reported Cause Remaining? Tested? Stabilized?

A 1 86 BPC -5.55" 21998.1 0.32 25 0.85 0.37 2015 Lancing Equipment Damage N/A No No

A 2 57 06C -0.37" 96910.1 0.51 13 0.27 0.32 2006 TSP Wear N/A No No

A 3 66 05C -0.67" 27901.1 0.21 24 0.27 0.32 2009 Foreign Object No No No

A 6 88 TSH +0.16" 27901.1 0.20 23 0.35 0.42 2006 Foreign Object No No No

A 8 38 TSH +0.40 " 21998.1 0.21 16 0.27 0.37 2001 Legacy Pitting N/A No No

A 34 67 TSH +0.03" 27901.1 0.19 22 0.27 0.26 2006 Foreign Object No No No

TSC +0.05" 27901.1 0.12 16 0.27 0.42 A 38 27 2018 Foreign Object No No No TSC +0.67" 27901.1 0.15 19 0.37 0.37

A 38 30 TSC +1.84" 27901.1 0.12 16 0.35 0.4 2006 Foreign Object No No No

B 1 7 TSH+0.24" 21998.1 0.21 18 0.37 0.32 2007 Historical SG N/A No No Maintenance

B 12 51 TSC+0.27" 21988.1 0.11 10 0.32 0.37 2019 Unknown. Small volumetric N/A No No

B 31 15 BPH +0.53" 27901.1 0.11 15 0.21 0.37 2010 Foreign Object No No No

B 31 16 BPH +0.53" 27901.1 0.16 20 0.24 0.48 2010 Foreign Object No No No

B 32 15 BPH +0.51" 27901.1 0.1 14 0.21 0.48 2010 Foreign Object No No No Serial No.23-020 Attachment 1 Docket No. 50-280 page 12 of 28

Max Axial Circ Foreign Depth Length Length Initially Object In S itu Plugged &

SG Row Col Location ETSS Volts (%TW) (in) fin) Reported Cause Remaining? Tested? Stabilized?

B 32 18 BPH +0.61 " 27901.1 0.09 12 0.24 0.26 2010 Foreign Object No No No

B 33 17 BPH+0.56 " 27901.1 0.05 8 0.21 0.34 2019 Foreign Object No No No

B 33 18 BPH +0.61 " 27901.1 0.13 17 0.29 0.32 2010 Foreign Object No No No

B 35 20 BPH +1.07' ' 27902.1 0.27 15 0.48 0.48 2010 Foreign Object No No No

B 37 31 04H-24.40 " 21998.1 0.13 12 0.21 0.37 2013 Unknown. Small volumetric N/A No No

B 40 50 TSH +0.48" 27901.1 0.31 31 0.48 0.42 2007 Foreign Object No No No

B 40 51 TSH +0.85" 27901.1 0.34 33 0.32 0.45 2007 Foreign Object No No No

B 41 51 TSH +0.13" 27901.1 0.11 15 0.24 0.32 2007 Foreign Object No No No

B 45 48 TSC+2.48 " 21998.1 0.43 32 0.32 0.32 2013 Unknown. Small volumetric N/A No No

C 3 52 TSC +0.40" 27901.1 0.3 30 0.27 0.37 2015 Foreign Object No No No

C 4 68 06C -0.32 " 96910.1 0.33 17 0.29 0.37 2015 TSP Wear N/A No No

C 15 49 04H -0.61 " 96910.1 0.31 15 0.24 0.32 2021 TSP Wear N/A No No

C 26 85 BPH + 0.59" 27901.1 0.26 28 0.19 0.63 2018 Foreign Object No No No

C 27 82 BPH +0.56" 27901.1 0.25 27 0.29 0.4 2010 Foreign Object No No No Serial No.23-020 Attachment 1 Docket No. 50-280 page 13 of 28

Max Axial Circ Foreign Depth Length Length Initially Object In Situ Plugged &

SG Row Co l Location ETSS Volts (%TW) (in) (in) Reported Cause Remaininq? Tested? Stabilized?

C 29 82 BPH + 0.56" 27901. 1 0.23 25 0.27 0.56 2018 Foreign Object No No No

C 34 55 02H -0.67 96910.1 0.32 15 0.27 0.26 2022 TSP Wear N/A No No

C 36 24 BPH -0.27" 96910.1 0.12 7 0.32 0.26 2012 FOB Wear N/A No No

C 36 64 TSC +0.03" 27901.1 0.3 30 0.27 0.37 2012 Foreign Object No No No

C 36 66 TSC-0.11" 27901.1 0.22 25 0.27 0.37 2015 Foreign Object No No No

C 38 66 TSC +0.08" 27901.1 0.29 30 0.32 0.37 2009 Foreign Object No No No

C 44 50 BPH -0.29" 96910.1 0.09 5 0.24 0.26 2015 FOB Wear N/A No No

C 45 52 BPH -0.21" 96910.1 0.09 5 0.24 0.29 2015 FOB Wear N/A No No

Serial No.23-020 Attachment 1 Docket No. 50-280 page 15 of 28

Table 5: Foreign Object Highlights

SG-Item# Description Location Configuration ECT Results Estimated Size Fixity 2022 Disposition R6-C69 Legacy metal disk Initially identified 1 R20. Evaluated in 2009 R7-C68 R6-C69 and R7-C69. 1.1" diameter lodged between tubes (1 R22) with Framatome CR 2009-2529.

(1 R20) Metal R7-C69 The disk Object has remained fixed since that time.

A-1 Historical disk its is sitting on PLP Fixed Position and fixity again confirmed during edge and is fused No Wear 0.2" thick 1 R31. Object has not caused tube TSC +0.24" to +1.24" to the top of the C/L degradation. Leave as is and monitor by tubesheet. ECT and SSI during next ISi.

During 1 R29, a small pile of legacy fine Legacy entangled wires embedded in fixed sludge was Historical (1 R21) R30-C47 mass of wire and Not aggressively raked and water lanced.

A-2 Entangled wire mass of sludge located at TSH NDD Determined Fixed During 1 R31, configuration confirmed by sludge/scale at TSH R30-C48 located behind the SSI. Wires pose no threat to tube integrity center stay rod (since 2007). Leave as is and monitor by ECT and SSI at next ISi.

Irregular object identified during 1 R29 Post Irregular shaped object Lance. Object is tightly lodged in place A-21 object at TSH R37-C73 during 1 Historical (1 R29) Irregular R36-C73 discovered at TSH PLP ~0.4" diameter Fixed between two tubes. ECT history shows R29 post No Wear object present back to 2006. 1 R31 ECT lance SSI observed no wear. Leave as is and monitor by ECT and SSI at next ISi.

R35-C71 R34-C71 R33-C71 During 1 R29, the sludge region was R32-C71 Area of sludge (behind Region is Fixed investigated by FOSAR and determined to Historical (1 R29) Area of R31-C71 inner most tie-rod) spread over 5 sludge at be sludge deposits located on the TIS A-22 sludge (behind inner most R31-C72 discovered at TSH NDD rows and 2 TIS.No (H/L) and fixed in place. No loose parts tie-rod) at TSH during 1 R29 post columns of loose parts were noted. During 1 R31, ECT was NDD R32-C72 lance SSI tubes noted. (no wear). Leave as is and monitor by ECT R33-C72 at next ISi.

R34-C72 R35-C72 During 1 R31 sludge rock discovered and A-33 located on TSH R26-C46 fixed 1R31 Hard sludge rock R25-C46 1 R31 Hard sludge rock LPS 0.50" X 0.25" X Fixed fixed to the TIS. ECT was NDD (no wear).

to TSH. No Wear 0.10" Leave as is and monitor by ECT at next ISi.

1 R31 Loose Wire on During 1 R31 ~2" wire discovered on TIS.

A-34 1 R31 Wire located on R30-C47 TSH. (Discovered at NDD ~2" long wire Retrieved ECT was NDD (no wear). Item was TSH FOTS A-2 I location) 1R31 removed and closed out at 1 R31. No actions required going forward.

Serial No.23-020 Attachment 1 Docket No. 50-280 page 16 of 28

SG-Item# Description Location Configuration ECT Results Estimated Size Fixity 2022 Disposition Parts captured in the During 1 R31, many objects were captured (1R31) Lancing strainer lancing strainers Various parts Retrieved at in the SGA lancing strainers. Most are A-32 parts TTS during 1R31 TTS N/A ranging from 1R31 sludge related. There were also fragments lancing ~1/8" to ~1" of small diameter wire and small pieces of flex gasket material.

Historical 1 R29 object. During 1 R31 ECT Historical (1 R29) lodged R40-C39 1 R29 Foreign object detected two PLP. No wear detected. SSI B-9 round object at TSH. R40-C40 lodged between two Two PLPs 0.4" diameter Fixed confirmed that part remains fixed to the Likely hard sludge. tubes atTSH TTS. Continue to monitor with ECT and SSI at next ISi.

R35-C27 1R31 piece of weld During 1 R31, weld slag identified during B-20 1R31 Piece of Weld Slag slag discovered during NOD 1.50" X 0.24" X Retrieved at post lance ISi and removed from the SG.

located at TSH R35-C28 post lance inspection. 0.20" 1R31 ECT results NOD. Item closed out at 1 R31.

Going forward no further actions required.

Parts captured in the During 1 R31, many objects were captured (1R31) Lancing strainer lancing strainers Various parts Retrieved at in the SGB lancing strainers. Most are B-21 parts TTS during 1R31 TTS N/A ranging from 1R31 sludge related. There were also fragments lancing ~1/8" to ~1" of small diameter wire and flex gasket material.

R4-C55, R4-C56 Deposit is fixed in place and not making Historical (1 R29) Deposit 1 R29 Hard deposit contact with tubes. During 1 R31, ECT was C-38 adhered to TSH R5-C55, R5-C56 tightly adhered to TSH. NOD ~0.5" diameter Fixed NOD (no wear). Going forward, monitor No tube contact. with ECT and perform SSI to verify part configuration.

1 R29 Hard deposit Spans multiple Object is hard deposit bridging and fixed in C-42 tube-to-tube bridging Historical (1 R29) Hard R9-C40 NOD tubes in TTS Fixed place. During 1R31, ECTwas NOD (no deposit bridging at TSH R10-C40 atTSH sludge region wear). Going forward, monitor with ECT and perform SSI to verify part configuration.

1 R31 Irregular Object During 1 R31, affected and bounding tubes C-49 (Tube Scale) in C/L R27-C85 Tube Scale INF 0.75" piece of Retrieved at NOD (no wear). Part was retrieved at R31.

annulus scale 1R31 Item closed out at R31 and requires no action going forward.

During 1 R31, affected and bounding tubes C-50 atTSC R4-C30 1 R31 Tube Scale located R4-C29 Tube Scale NOD 0.3" piece of Retrieved at NOD (no wear). Part was retrieved at R31.

scale 1R31 Item closed out at R31 and requires no action going forward.

During 1 R31, part was retrieved at R31 C-51 1 R31 Tube Scale located NTL Tube Scale N/A 0.75" piece of Retrieved at from the NTL. No tubes affected. Item on NTL scale 1R31 closed out at R31 and requires no action going forward.

Serial No.23-020 Attachment 1 Docket No. 50-280 page 17 of 28

SG-Item# Description Location Configuration ECT Results Estimated Size Fixity 2022 Disposition Irregular shaped object During 1 R31, affected and bounding tubes C-52 center Tie 1 R31 Irregular shaped R1-C47 wedged between Rod NOD 0.3" diameter 1R31 Retrieved at NOD (no wear). Part was retrieved at R31.

object located at TSC R1-C48 pedestal and first row Item closed out at R31 and requires no of tubes action going forward.

During 1 R31, affected and bounding tubes C-53 atTSH R10-C39 in sludge 1R31 Small wire located R9-C39 Small wire embedded NOD Small wire Fixed NOD (no wear). SSI confirmed that part is fixed. Going forward, monitor with ECT and perform SSI to verify part configuration.

1 R31 Small wires During 1 R31, affected and bounding tubes C-56 embedded in sludge R1-C48 Small wires embedded NOD Mass of small Fixed NOD (no wear). SSI confirmed that part is buildup at TSH R1-C49 in sludge buildup wires fixed. Going forward, monitor with ECT and perform SSI to verify part configuration.

Parts captured in the During 1 R31, many objects were captured (1 R31) Lancing strainer lancing strainers Various parts Retrieved at in the SGC lancing strainers. Most are C-58 TTS parts during 1R31 TTS N/A ranging from sludge related. There were also fragments lancing ~1/8" to ~1/2" 1R31 of small diameter wire and flex gasket material.