ML13077A389

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San Onofre, Unit 2 - Response to Request for Additional Information (RAI 42) Regarding Confirmatory Action Letter Response
ML13077A389
Person / Time
Site: San Onofre Southern California Edison icon.png
Issue date: 03/15/2013
From: St.Onge R J
Edison International Co, Southern California Edison Co
To:
Document Control Desk, Office of Nuclear Reactor Regulation
References
TAC ME9727
Download: ML13077A389 (21)
v • d • e


Text

SOUTHERN CALIFORNIA Richard I. St. OngeI EDISONDirector. Nuclear Regulatory Affairs andEDISON Emergency PlanningAn EDISON INTERNATIONAL CompanyMarch 15, 201310 CFR 50.4U.S. Nuclear Regulatory CommissionATTN: Document Control DeskWashington, DC 20555-0001

Subject:

Docket No. 50-361Response to Request for Additional Information (RAI 42)Regarding Confirmatory Action Letter Response(TAC No. ME 9727)San Onofre Nuclear Generating Station, Unit 2

References:

1. Letter from Mr. Elmo E. Collins (USNRC) to Mr. Peter T. Dietrich (SCE), datedMarch 27, 2012, Confirmatory Action Letter 4-12-001, San Onofre NuclearGenerating Station, Units 2 and 3, Commitments to Address Steam GeneratorTube Degradation2. Letter from Mr. Peter T. Dietrich (SCE) to Mr. Elmo E. Collins (USNRC), datedOctober 3, 2012, Confirmatory Action Letter -Actions to Address SteamGenerator Tube Degradation, San Onofre Nuclear Generating Station, Unit 23. Email from Mr. James R. Hall (USNRC) to Mr. Ryan Treadway (SCE), datedFebruary 20, 2013, Request for Additional Information (RAIs 38-52) RegardingResponse to Confirmatory Action Letter, San Onofre Nuclear GeneratingStation, Unit 2

Dear Sir or Madam,

On March 27, 2012, the Nuclear Regulatory Commission (NRC) issued a Confirmatory ActionLetter (CAL) (Reference 1) to Southern California Edison (SCE) describing actions that the NRCand SCE agreed would be completed to address issues identified in the steam generator tubesof San Onofre Nuclear Generating Station (SONGS) Units 2 and 3. In a letter to the NRC datedOctober 3, 2012 (Reference 2), SCE reported completion of the Unit 2 CAL actions andincluded a Return to Service Report (RTSR) that provided details of their completion.By email dated February 20, 2013 (Reference 3), the NRC issued Requests for AdditionalInformation (RAI) regarding the CAL response. Enclosure 2 of this letter provides the responseto RAI 42.::63 (P.O. Box 128San Clemente, CA 92672 Document Control Desk March 15, 2013There are no new regulatory commitments contained in this letter. If you have any questions orrequire additional information, please call me at (949) 368-6240.Sincerely,

Enclosures:

1. Response to RAI 42cc: E. E. Collins, Regional Administrator, NRC Region IVJ. R. Hall, NRC Project Manager, SONGS Units 2 and 3G. G. Warnick, NRC Senior Resident Inspector, SONGS Units 2 and 3R. E. Lantz, Branch Chief, Division of Reactor Projects, NRC Region IV ENCLOSURE 1SOUTHERN CALIFORNIA EDISONRESPONSE TO REQUEST FOR ADDITIONAL INFORMATIONREGARDING RESPONSE TO CONFIRMATORY ACTION LETTERDOCKET NO. 50-361TAC NO. ME 9727Response to RAI 42 RAI 42In Reference 3, p. 4 (4 of 62), SCE does not conclusively state which screened tubes wereactually plugged. Please discuss the threshold and implementation of the criteria (withexceptions) and provide or refer to a list of confirmed plugged tubes in Unit 2.RESPONSENote: RAI Reference 3 is MHI Document L5-04GA571, "Screening Criteria for Susceptibility toIn-Plane Tube Motion," Revision 6, dated October 3, 2012.Conclusively state which screened tubes were pluggedAll tubes with an aggregate score at or above the threshold screening level were plugged. TheUnit 2 steam generator (SG) tubes meeting the screening criteria from RAI Reference 3 arelisted in Table 15, for SG 2E-089, and Table 16, for SG 2E-088.Discuss the threshold and implementation of the criteria (with exceptions)RAI Reference 3 identified nine screening criteria found to indicate susceptibility to tube-to-tubewear (TTW) from Unit 3 results:1. COUNT -Number of wear indications at anti-vibration bar (AVB) intersections2. HOT COUNT -Number of AVB wear indications on the hot leg side of U-bend3. HIGH/LOW -Wear indications at AVB bars B01/B02 and B131/B124. CONTINUOUS -Number of consecutive AVB wear indications5. TSP -Wear indications at upper tube support plate (TSP) intersections (TSP 5, 6 and 7)6. LENGTH -Length of AVB wear scars as determined from bobbin coil inspection data7. VOID -Average void fraction that the tube is exposed to in U-bend region8. REGION -Distance to center of AVB wear area9. COUPLING -Coupling effect between adjacent tubes (i.e., proximity to tubes that screen infor plugging)Details of the nine screening criteria are described in RAI Reference 3, Section 3, "Proposedscreening criteria based on Unit 3 results."Weighting factors for each of the nine criteria were developed based on the proportion of Unit 3tubes meeting the criteria that exhibited TTW. Individual thresholds were not set for eachcriterion. Instead, all nine weighting factors were aggregated to produce a combined, tube-specific TTW susceptibility score. Using the examination data from the 326 tubes found withTTW in Unit 3, a threshold screening level was established such that the combined TTWsusceptibility scores of all tubes exhibiting TTW were above the threshold screening level. Thisassured that the false negative rate for the threshold screening level was zero.The screening criteria were applied to tubes in both Unit 2 SGs, and 99 tubes in SG 2E-088 and203 tubes in SG 2E-089 were identified with combined TTW susceptibility scores above thethreshold screening level. Further validating the screening criteria approach, the 203 screenedtubes in SG 2E-089 included both tubes in SG 2E-089 found with TTW (no tubes in SG 2E-088were found with TTW).Page 2 of 19 No exceptions were taken to the screening criteria. However, additional tubes were selected forpreventative plugging based on recommendations from vendors and industry experts. Refer toTable 8-4 of the CAL Response, Enclosure 2, SONGS Unit 2 Return to Service Report.Provide a list of confirmed plugged tubes in Unit 2SONGS Nuclear Engineering Change Package (NECP) 800873488, Revision 0, AffectedSection Change (ASC) D0062286, contains lists of the confirmed plugged tubes in Unit 2. Thefollowing pages provide the tube plugging lists excerpted from this NECP. The highlightedtubes were those recommended for plugging in RAI Reference 3, Tables 15 and 16.Page 3 of 19 NECP Number 800873488 Rev 0ASC No. D0062286U2NCP No800873486Page _28_of 43 1U2 NECP 800873488RSG 2E-088 Tube Plugging/Stabilizing ListaRow Col Plug Stab Typeb Stab Length (in) Reason112 88 Yes Single 668 35% TWD AVB133 91 Yes Single 668 35% TWD AVB124 48 Yes Single 668 47% TWD- Retainer Bar125 49 Yes Single 668 54% TWD -Retainer Bar120 92 Yes Single 668 Preventative -AVB128 94 Yes Single 668 Preventative -AVB121 81 Yes Split Note c Preventative -FSW120 82 Yes Split Note c Preventative. FSW105 83 Yes Split Note c Preventative -FSW107 83 Yes Split Note c Preventative -FSW104 84 Yes Split Note c Preventative -FSW106 84 Yes Split Note c Preventative -FSW108 84 Yes Split Note c Preventative -FSW122 84 Yes Split Note c Preventative -FSW97 85 Yes Split Note c Preventative -FSW99 85 Yes Split Note c Preventative -FSW103 85 Yes Split Note c Preventative -FSW105 85 Yes Split Note c Preventative -FSW107 85 Yes Split Note c Preventative -FSW115 85 Yes Split Note c Preventative -FSW121 85 Yes Split Note c Preventative -FSW123 8S Yes Split Note c Preventative -FSW133 85 Yes Split Note c Preventative -FSW98 86 Yes Split Note c Preventative -FSW100 86 Yes Split Note c Preventative -FSW102 86 Yes Split Note c Preventative -FSW104 86 Yes Split Note c Preventative -FSW106 86 Yes Split Note c Preventative -FSW108 86 Yes Split Note c Preventative -FSW112 86 Yes Split Note c Preventative -FSW114 86 Yes Split Note c Preventative -FSW116 86 Yes Split Note c Preventative -FSW122 86 Yes Split Note c Preventative -FSW124 86 Yes Split Note c Preventative -FSWa) From AREVA Steam Generator Eddy Current Final Report -San Onofre Nuclear Generating Station(SONGS) Unit 2- Steam Generators 88 & 89- 2012.-U2C17 & Return to Serviceb) Single stabilizers are installed on the hot side of the tube, split stabilizers are installed on the hot and coldside of the tubec) See AREVA Product Information Sheet for Stabilizer U-Bend (Ref. 15) for split stabilizer lengthsd) Conservatively plugged as a defense in depth action per Westinghouse recommendation (Ref. 23)Attachment 3 PAGE 1 of 16Page 4 of 19 NECP Number 800873488 Rev 0U2NCP No800873486Page 29 of 43 1U2 NECP 800873488RSG 2E-088 Tube Plugging/Stabilizing ListaRow Col Plug Stab Typeb Stab Length (in) Reason126 86 Yes Split Note c Preventative -FSW101 87 Yes Split Note c Preventative -FSW103 87 Yes Split Note c Preventative -FSW105 87 Yes Split Note c Preventative -FSW111 87 Yes Split Note c Preventative -FSW113 87 Yes Split Note c Preventative -FSW115 87 Yes Split Note c Preventative -FSW121 87 Yes Split Note c Preventative -FSW123 87 Yes Split Note c Preventative -FSW125 87 Yes Split Note c Preventative -FSW100 88 Yes Split Note c Preventative -FSW102 88 Yes Split Note c Preventative -FSW104 88 Yes Split Note c Preventative -FSW106 88 Yes Split Note c Preventative -FSW110 88 Yes Split Note C Preventative -FSW114 88 Yes Split Note c Preventative -FSW116 88 Yes Split Note c Preventative -FSW118 88 Yes Split Note c Preventative -FSW120 88 Yes Split Note c Preventative -FSW122 88 Yes Split Note c Preventative -FSW124 88 Yes Split Note c Preventative -FSW95 89 Yes Split Note c Preventative -FSW101 89 Yes Split Note c Preventative -FSW103 89 Yes Split Note c Preventative -FSW105 89 Yes Split Note c Preventative -FSW107 89 Yes Split Note c Preventative -FSW111 89 Yes Split Note c Preventative -FSW113 89 Yes Split Note c Preventative -FSW115 89 Yes Split Note c Preventative -FSW117 89 Yes Split Note c Preventative -FSW119 89 Yes Split Note c Preventative -FSW121 89 Yes Split Note c Preventative -FSW123 89 Yes Split Note c Preventative -FSW127 89 Yes Split Note c Preventative -FSWa) From AREVA Steam Generator Eddy Current Final Report -San Onofre Nuclear Generating Station(SONGS) Unit 2 -Steam Generators 88 & 89- 2012-U2C17 & Return to Serviceb) Single stabilizers are installed on the hot side of the tube, split stabilizers are installed on the hot and coldside of the tubec) See AREVA Product Information Sheet for Stabilizer U-Bend (Ref. 15) for split stabilizer lengthsd) Conservatively plugged as a defense in depth action per Westinghouse recommendation (Ref. 23)Attachment 3 PAGE 2 of 16Page 5 of 19 NECP Number 800873488 Rev 0ASC No. D0062286U2 NECP 800873488RSG 2E-088 Tube Plugging/Stabilizing List"Page _Mof 43 1U2 NECP 800873488RSG 2E-088 Tube Plugging/Stabilizing List'Row Col Plug Stab Typeb Stab Length (in) Reason94 90 Yes Split Note c Preventative -FSW100 90 Yes Split Note c Preventative -FSW102 90 Yes Split Note c Preventative -FSW104 90 Yes Split Note c Preventative -FSW106 90 Yes Split Note c Preventative -FSW110 90 Yes Split Note c Preventative -FSW112 90 Yes Split Note c Preventative -FSW114 90 Yes Split Note c Preventative -FSW116 90 Yes Split Note c Preventative -FSW95 91 Yes Split Note c Preventative -FSW101 91 Yes Split Note c Preventative -FSW103 91 Yes Split Note c Preventative -FSW105 91 Yes Split Note c Preventative -FSW107 91 Yes Split Note c Preventative -FSW109 91 Yes Split Note c Preventative -FSW111 91 Yes Split Note c Preventative -FSW113 91 Yes Split Note c Preventative -FSW115 91 Yes Split Note c Preventative -FSW117 91 Yes Split Note c Preventative -FSW98 92 Yes Split Note c Preventative -FSW100 92 Yes Split Note c Preventative -FSW102 92 Yes Split Note c Preventative -FSW104 92 Yes Split Note c Preventative -FSW106 92 Yes Split Note c Preventative- FSW108 92 Yes Split Note c Preventative -FSW110 92 Yes Split Note c Preventative -FSW112 92 Yes Split Note c Preventative -FSW114 92 Yes Split Note c Preventative -FSW116 92 Yes Split Note c Preventative -FSW118 92 Yes Split Note c Preventative -FSW136 92 Yes Split Note c Preventative -FSW99 93 Yes Split Note c Preventative -FSW101 93 Yes Split Note c Preventative -FSW103 93 Yes Split Note c Preventative -FSWa) From AREVA Steam Generator Eddy Current Final Report -San Onofre Nuclear Generating Station(SONGS) Unit 2- Steam Generators 88 & 89- 2012-U2C17 & Return to Serviceb) Single stabilizers are installed on the hot side of the tube, split stabilizers are installed on the hot and coldside of the tubec) See AREVA Product Information Sheet for Stabilizer U-Bend (Ref. 15) for split stabilizer lengthsd) Conservatively plugged as a defense in depth action per Westinghouse recommendation (Ref. 23)Attachment 3 PAGE 3 of 16Page 6 of 19 NECP Number 800873488 Rev 0ASC No. D0062286Page 31 of 43 1U2 NECP 800873488RSG 2E-088 Tube Plugging/Stabilizing ListaRow Col Plug Stab Typeb Stab Length (in) Reason107 93 Yes Split Note c Preventative -FSW111 93 Yes Split Note c Preventative -FSW117 93 Yes Split Note c Preventative -FSW129 93 Yes Split Note c Preventative -FSW94 94 Yes Split Note c Preventative -FSW135 93 Yes Split Note c Preventative -FSW4137 89 Yes Split Note c Preventative -FSWd108 34 Yes None Preventative -Retainer Bar110 34 Yes Single 668 Preventative -Retainer Bar111 35 Yes None Preventative -Retainer Bar109 35 Yes Single 668 Preventative -Retainer Bar110 36 Yes None Preventative -Retainer Bar112 36 Yes None Preventative -Retainer Bar111 37 Yes None Preventative -Retainer Bar113 37 Yes None Preventative -Retainer Bar112 38 Yes None Preventative -Retainer Bar114 38 Yes None Preventative -Retainer Bar113 39 Yes None Preventative -Retainer Bar11S 39 Yes None Preventative -Retainer Bar114 40 Yes None Preventative -Retainer Bar116 40 Yes None Preventative -Retainer Bar115 41 Yes None Preventative -Retainer Bar117 41 Yes None Preventative -Retainer Bar116 42 Yes None Preventative -Retainer Bar118 42 Yes None Preventative -Retainer Bar117 43 Yes None Preventative -Retainer Bar119 43 Yes None Preventative -Retainer Bar118 44 Yes None Preventative -Retainer Bar120 44 Yes None Preventative -Retainer Bar119 45 Yes None -Preventative -Retainer Bar121 45 Yes Single 668 Preventative -Retainer Bar122 46 Yes None -Preventative -Retainer Bar120 46 Yes Single 668 Preventative -Retainer Bar121 47 Yes None Preventative -Retainer Bara) From AREVA Steam Generator Eddy Current Final Report -San Onofre Nuclear Generating Station(SONGS) Unit 2 -Steam Generators 88 & 89 -2012-U2C17 & Return to Serviceb) Single stabilizers are installed on the hot side of the tube, split stabilizers are installed on the hot and coldside of the tubec) See AREVA Product Information Sheet for Stabilizer U-Bend (Ref. 15) for split stabilizer lengthsd) Conservatively plugged as a defense in depth action per Westinghouse recommendation (Ref. 23)Attachment 3 PAGE 4 of 16Page 7 of 19 Kl, 6%k *rnnQ7'1A00 D0l nACt' ki rnnC)')QCI uIm' VU. .V.-0A7A0 ,. ag 2f4Page _32 of 43 1U2 NECP 800873488RSG 2E-088 Tube Plugging/Stabilizing ListaRow Col Plug Stab Typeb Stab Length (in) Reason123 47 Yes None Preventative -Retainer Bar122 48 Yes None Preventative -Retainer Bar123 49 Yes None Preventative -Retainer Bar124 50 Yes None Preventative -Retainer Bar126 50 Yes None Preventative -Retainer Bar125 51 Yes None Preventative -Retainer Bar127 51 Yes None Preventative -Retainer Bar126 52 Yes None Preventative -Retainer Bar128 52 Yes None Preventative -Retainer Bar127 53 Yes None Preventative -Retainer Bar129 53 Yes None Preventative -Retainer Bar128 54 Yes None Preventative -Retainer Bar130 54 Yes None Preventative -Retainer Bar129 55 Yes None Preventative -Retainer Bar131 55 Yes None Preventative -Retainer Bar130 56 Yes Single 668 Preventative -Retainer Bar132 56 Yes Single 668 Preventative -Retainer Bar131 57 Yes None Preventative -Retainer Bar131 121 Yes None -Preventative -Retainer Bar130 122 Yes Single 668 Preventative -Retainer Bar132 122 Yes Single 668 Preventative -Retainer Bar129 123 Yes None -Preventative -Retainer Bar131 123 Yes None Preventative -Retainer Bar128 124 Yes None Preventative -Retainer Bar130 124 Yes None Preventative -Retainer Bar127 125 Yes None Preventative -Retainer Bar129 125 Yes None Preventative -Retainer Bar126 126 Yes None Preventative -Retainer Bar128 126 Yes None Preventative -Retainer Bar125 127 Yes None Preventative -Retainer Bar127 127 Yes None Preventative -Retainer Bar124 128 Yes None Preventative -Retainer Bar126 128 Yes None Preventative -Retainer Bar123 129 Yes None Preventative -Retainer Bara) From AREVA Steam Generator Eddy Current Final Report -San Onofre Nuclear Generating Station(SONGS) Unit 2 -Steam Generators 88 & 89 -2012-U2C17 & Return to Serviceb) Single stabilizers are installed on the hot side of the tube, split stabilizers are installed on the hot and coldside of the tubec) See AREVA Product Information Sheet for Stabilzer U-Bend (Ref. 15) for split stabilizer lengthsd) Conservatively plugged as a defense in depth action per Westinghouse recommendation (Ref. 23)Attachment 3 PAGE S of 16Page 8 of 19 NECP Number 800873488 Rev 0ASC No. D0062286Page 33 of 43 1U2 NECP 800873488RSG ZE-088 Tube Plugging/Stabilizing LiStaRow Col Plug Stab Typeb Stab Length (in) Reason125 129 Yes None Preventative -Retainer Bar122 130 Yes None Preventative -Retainer Bar124 130 Yes None Preventative -Retainer Bar121 131 Yes None Preventative -Retainer Bar123 131 Yes None Preventative -Retainer Bar122 132 Yes None -Preventative -Retainer Bar120 132 Yes Single 668 Preventative -Retainer Bar119 133 Yes None -Preventative -Retainer Bar121 133 Yes Single 668 Preventative -Retainer Bar118 134 Yes None -Preventative -Retainer Bar120 134 Yes None Preventative -Retainer Bar117 135 Yes None Preventative -Retainer Bar119 135 Yes None Preventative -Retainer Bar116 136 Yes None Preventative -Retainer Bar118 136 Yes None Preventative -Retainer Bar115 137 Yes None Preventative -Retainer Bar117 137 Yes None Preventative -Retainer Bar114 138 Yes None Preventative -Retainer Bar116 138 Yes None Preventative -Retainer Bar113 139 Yes None Preventative -Retainer Bar115 139 Yes None Preventative -Retainer Bar112 140 Yes None Preventative -Retainer Bar114 140 Yes None Preventative -Retainer Bar111 141 Yes None Preventative -Retainer Bar113 141 Yes None Preventative -Retainer Bar110 142 Yes None Preventative -Retainer Bar112 142 Yes None Preventative -Retainer Bar111 143 Yes None -Preventative -Retainer Bar109 143 Yes Single 668 Preventative -Retainer Bar108 144 Yes None -Preventative -Retainer Bar110 144 Yes Single 668 Preventative -Retainer Bar98 84 Yes Split Note c Wear at 6 Continuous AVBs88 88 Yes Split Note c Wear at 6 Continuous AVBs97 89 Yes Split Note c Wear at 6 Continuous AVBsa) From AREVA Steam Generator Eddy Current Final Report -San Onofre Nuclear Generating Station(SONGS) Unit 2- Steam Generators 88 & 89- 2012-U2C17 & Return to Serviceb) Single stabilizers are installed on the hot side of the tube, split stabilizers are installed on the hot and coldside of the tubec) See AREVA Product Information Sheet for Stabilizer U-Bend (Ref. 15) for split stabilizer lengthsd) Conservatively plugged as a defense in depth action per Westinghouse recommendation (Ref. 23)Attachment 3 PAGE 6 of 16Page 9 of 19 NECP Number 800873488 Rev 0ASC No- D0062286Page 34 of 43 1U2 NECP 800873488RSG 2E-088 Tube Plugging/Stabilizing ListaRow Col Plug Stab Typeb Stab Length (in) Reason108 90 Yes Split Note c Wear at 6 Continuous AVBs124 92 Yes Split Note c Wear at 6 Continuous AVBs134 94 Yes Split Note c Wear at 6 Continuous AVBsa) From AREVA Steam Generator Eddy Current Final Report -San Onofre Nuclear Generating Station(SONGS) Unit 2 -Steam Generators 88 & 89 -2012-U2C17 & Return to Serviceb) Single stabilizers are installed on the hot side of the tube, split stabilizers are installed on the hot and coldside of the tubec) See AREVA Product Information Sheet for Stabilizer U-Bend (Ref. 15) for split stabilizer lengthsd) Conservatively plugged as a defense in depth action per Westinghouse recommendation (Ref. 23)Attachment 3 PAGE 7 of 16Page 10 of 19 NECP Number 800873488 Rev 0 ASC No. D0062286Page 35 of 43 1U2 NECP 800873488RSG 2E-089 Tube Plugging/Stabilizing UstaRow Col Plug Stab Typeb Stab Length (in) Reason111 81 Yes Split Note c 14% TWD- FSW (Preventative)113 81 Yes Split Note c 14% TWD- FSW (Preventative)127 127 Yes Single 668 38% TWD -Retainer Bar119 133 Yes Single 668 90% TWD -Retainer Bar103 77 Yes Split Note c Preventative -FSW109 77 Yes Split Note c Preventative -FSW111 77 Yes Split Note c Preventative -FSW100 78 Yes Split Note c Preventative -FSW102 78 Yes Split Note c Preventative -FSW104 78 Yes Split Note c Preventative -FSW108 78 Yes Split Note c Preventative -FSW110 78 Yes Split Note c Preventative -FSW112 78 Yes Split Note c Preventative -FSW97 79 Yes Split Note c Preventative -FSW99 79 Yes Split Note c Preventative -FSW101 79 Yes Split Note c Preventative -FSW112 79 Yes Split Note c Preventative -FSW92 80 Yes Split Note c Preventative -FSW94 80 Yes Split Note c Preventative -FSW96 80 Yes Split Note c Preventative -FSW98 80 Yes Split Note c Preventative -FSW100 80 Yes Split Note c Preventative -FSW102 80 Yes Split Note c Preventative -FSW110 80 Yes Split Note c Preventatve -FSW112 80 Yes Split Note c Preventative -FSW114 80 Yes Split Note c Preventative -FSW91 81 Yes Split Note c Preventative -FSW93 81 Yes Split Note c Preventative -FSW9S 81 Yes Split Note c Preventative -FSW97 81 Yes Spilt Note c Preventative -FSW99 81 Yes Split Note c Preventative -FSW101 81 Yes Split Note c Preventative -FSW1U3 81 Yes Split Note c Preventative -FSW106 81 Yes Split Note c Preventative -FSW107 81 Yes Split Note c Preventative -FSWa) From AREVA Steam Generator Eddy Current Final Report -San Onofre Nuclear Generating Station(SONGS) Unit 2 -Steam Generators 88 & 89-2012-U2C17 & Return to Serviceb) Single stabilizers are installed on the hot side of the tube, split stabilizers are installed on the hot and coldside of the tubec) See AREVA Product Information Sheet for Stabiizer U-Bend (Ref. 15) for split stabilizer lengthsd) Conservatively plugged as a defense in depth action per Westinghouse recommendation (Ref. 23)Attachment 3 PAGE 8 of 16Page 11 of 19 Klal m I k,,k o/1nn 7"1A00 13-eAA0i'M nma'31)012UM~'f V1..k,. OAO'O DU. Pg 6 f4Page 36 of 43 1U2 NECP 800873488RSG 2E-089 Tube Plugging/Stabilizing ListaRow Col Plug Stab Typeb Stab Length (in) Reason109 81 Yes Split Note c Preventative -FSW115 81 Yes Split Note c Preventative -FSW117 81 Yes Split Note c Preventative -FSW119 81 Yes Split Note c Preventative -FSW121 81 Yes Split Note c Preventative -FSW90 82 Yes Split Note c Preventative -FSW92 82 Yes Split Note c Preventative -FSW94 82 Yes Split Note c Preventative -FSW96 82 Yes Split Note c Preventative -FSW98 82 Yes Split Note c Preventative -FSW100 82 Yes Split Note c Preventative -FSW102 82 Yes Split Note c Preventative -FSW104 82 Yes Split Note c Preventative -FSW106 82 Yes Split Note c Preventative -FSW108 82 Yes Split Note c Preventative -FSW110 82 Yes Split Note c Preventative -FSW112 82 Yes Split Note c Preventative -FSW114 82 Yes Split Note c Preventative -FSW116 82 Yes Split Note c Preventative -FSW118 82 Yes Split Note c Preventative -FSW120 82 Yes Split Note c Preventative -FSW122 82 Yes Split Note c Preventative -FSW91 83 Yes Split Note c Preventative -FSW93 83 Yes Split Note c Preventative -FSW95 83 Yes Split Note c Preventative -FSW97 83 Yes Split Note c Preventative -FSW99 83 Yes Split Note c Preventative -FSW101 83 Yes Split Note c Preventative -FSW103 83 Yes Split Note c Preventative -FSW105 83 Yes Split Note c Preventative -FSW107 83 Yes Split Note c Preventative -FSW109 83 Yes Split Note c Preventative -FSW11 83 Yes Split Note c Preventative -FSW113 83 Yes Split Note c Preventative -FSWS115 83 Yes Split Notec Preventative -FSWa) From AREVA Steam Generator Eddy Current Final Report -San Onofre Nuclear Generating Station(SONGS) Unit 2- Steam Generators 88 & 89- 2012-U2C17 & Return to Serviceb) Single stabilizers are installed on the hot side of the tube, split stabilizers are installed on the hot and coldside of the tubec) See AREVA Product Information Sheet for Stabilizer U-Bend (Ref. 15) for split stabilizer lengthsd) Conservatively plugged as a defense in depth action per Westinghouse recommendation (Ref. 23)Attachment 3 PAGE 9 of 16Page 12 of 19 NECP Number 800873488 Rev 0 ASC No. D0062286Page 37 of 43 1U2 NECP 800873488RSG 2E-089 Tube Plugging/Stabilizing UstaRow Col Plug Stab Typeb Stab Length (in) Reason117 83 Yes Split Note c Preventative -FSW119 83 Yes Split Note c Preventatve -FSW121 83 Yes Split Note c Preventative -FSW90 84 Yes Split Note c Preventative -FSW92 84 Yes Split Note c Preventative -FSW94 84 Yes Split Note c Preventative -FSW96 84 Yes Split Note c Preventative -FSW98 84 Yes Split Note c Preventative -FSW100 84 Yes Split Note c Preventative -FSW102 84 Yes Split Note c Preventative -FSW104 84 Yes Split Note c Preventatlve -FSW106 84 Yes Split Note c Preventative -FSW106 84 Yes Split Note c Preventative -FSW110 84 Yes Split Note c Preventative -FSW112 84 Yes Split Note c Preventative -FSW114 84 Yes Split Note c Preventative -FSW116 84 Yes Split Note c Preventative -FSW118 84 Yes Split Note c Preventative -FSW120 84 Yes Split Note c Preventative -FSW126 84 Yes Split Note c Preventative -FSW128 84 Yes Split Note c Preventative -FSW132 84 Yes Split Note c Preventative -FSW91 85 Yes Split Note c Preventative -FSW93 85 Yes Split Note c Preventative -FSW95 85 Yes Split Note c Preventative -FSW97 85 Yes Split Note c Preventativ -FSW99 85 Yes Split Note c Preventative -FSW101 85 Yes Split Note c Preventative -FSW103 85 Yes Split Note c Preventative -FSW105 85 Yes Split Note c Preventative -FSW107 85 Yes Split Note c Preventative -FSW109 85 Yes Split Note c Preventative -FSW1U 85 Yes Split Note c Preventative -FSW113 85 Yes Split Note c Preventative -FSW115 85 Yes Split Note c Preventative -FSWa) From AREVA Steam Generator Eddy Current Final Report -San Onofre Nuclear Generating Station(SONGS) Unit 2 -Stea m Generators 88 & 89 -2012-U2C17 & Return to Serviceb) Single stabilizers are installed on the hot side of the tube, split stabilizers are installed on the hot and coldside of the tubec) See AREVA Product Information Sheet for Stabilizer U-Bend (Ref. 15) for split stabilizer lengthsd) Conservatively plugged as a defense in depth action per Westinghouse recommendation (Ref. 23)Attachment 3 PAGE 10 of 16Page 13 of 19 NECP Number 800873488 Rev 0 ASC No. D0062286Page 38 of 43 1U2 NECP 800873488RSG 2E-089 Tube Plugging/Stabilizing ListaRow Col Plug Stab Typeb Stab Length (in) Reason117 85 Yes Split Note c Preventative -FSW119 85 Yes Split Note c Preventative -FSW121 85 Yes Split Note c Preventative -FSW127 85 Yes Split Note c Preventative -FSW88 86 Yes Split Note c Preventative -FSW92 86 Yes Split Note c Preventative -FSW94 86 Yes Split Note c Preventative -FSW96 86 Yes Split Note c Preventative -FSW98 86 Yes Split Note c Preventative -FSW100 86 Yes Split Note c Preventative -FSW102 86 Yes Split Note c Preventative -FSW104 86 Yes Split Note c Preventative -FSW106 86 Yes Split Note c Preventative -FSW108 86 Yes Split Note c Preventative -FSW110 86 Yes Split Note c Preventative -FSW112 86 Yes Split Note c Preventative -FSW114 86 Yes Split Note c Preventative -FSW116 86 Yes Split Note c Preventative -FSW118 86 Yes Split Note c Preventative -FSW122 86 Yes Split Note c Preventative -FSW130 86 Yes Split Note c Preventative -FSW93 87 Yes Split Note c Preventative -FSW95 87 Yes Split Note c Preventative -FSW97 87 Yes Split Note c Preventative -FSW99 87 Yes Split Note c Preventative -FSW101 87 Yes Split Note c Preventative -FSW103 87 Yes Split Note c Preventative -FSW105 87 Yes Split Note c Preventative -FSW107 87 Yes Split Note c Preventative -FSW109 87 Yes Split Note c Preventative -FSW111 87 Yes Split Note c Preventative -FSW113 87 Yes Split Note c Preventative -FSW115 87 Yes Split Note c Preventative -FSW117 87 Yes Split Note c Preventative -FSW119 87 Yes Split Note c Preventative -FSWa) From AREVA Steam Generator Eddy Current Final Report -San Onofre Nuclear Generating Station(SONGS) Unit 2 -Steam Generators 88 & 89- 2012-U2C17 & Return to Serviceb) Single stabilizers are installed on the hot side of the tube, split stabilizers are installed on the hot and coldside of the tubec) See AREVA Product Information Sheet for Stabilizer U-Bend (Ref. 15) for split stabilizer lengthsd) Conservatively plugged as a defense in depth action per Westinghouse recommendation (Ref. 23)Attachment 3 PAGE 11 of 16Page 14 of 19 NECP Number 800873488 Rev 0 ASC No. D0062286Page 39 of 43 1U2 NECP 800873488RSG 2E-089 Tube Plugging/Stabilizing UstaRow Col Plug Stab Typeb Stab Length (in) Reason129 87 Yes Split Note c Preventative -FSW94 88 Yes Split Note c Preventative -FSW96 88 Yes Split Note c Preventative -FSW98 88 Yes Split Note c Preventative -FSW100 88 Yes Split Note c Preventative -FSW102 88 Yes Split Note c Preventative -FSW104 88 Yes Split Note c Preventative -FSW106 88 Yes Split Note c Preventative -FSW10 88 Yes Split Note c Preventative -FSW110 88 Yes Split Note c Preventative- FSW112 88 Yes Split Note c Preventative -FSW114 88 Yes Split Note c Preventative -FSW116 88 Yes Split Note c Preventative -FSW118 88 Yes Split Note c Preventative -FSW138 88 Yes Split Note c Preventative -FSW95 89 Yes Split Note c Preventative -FSW97 89 Yes Split Note c Preventative -FSW99 89 Yes Split Note c Preventative -FSW101 89 Yes Split Note c Preventative -FSW103 89 Yes Split Note c Preventatlve -FSW105 89 Yes Split Note c Preventative -FSW107 89 Yes Split Note c Preventative -FSW109 89 Yes Split Note c Preventative -FSW111 89 Yes Split Note c Preventative -FSW113 89 Yes Split Note c Preventative -FSW115 89 Yes Split Note c Preventative -FSW117 89 Yes Split Note c Preventative -FSW131 89 Yes Split Note c Preventative -FSW100 90 Yes split Note c Preventative -FSW102 90 Yes Split Note c Preventative -FSW104 90 Yes Split Note c Preventative -FSW106 90 Yes Split Note c Preventative -FSW108 90 Yes Split Note c Preventative -FSW110 90 Yes Split Note c Preventative -FSW112 90 Yes Split Note c Preventative -FSWa) From AREVA Steam Generator Eddy Current Final Report -San Onofre Nuclear Generating Station(SONGS) Unit 2 -Steam Generators 88 & 89 -2012-U2C17 & Return to Serviceb) Single stabilizers are installed on the hot side of the tube, split stabilizers are installed on the hot and coldside of the tubec) See AREVA Product Information Sheet for Stabilizer U-Bend (Ref. 15) for split stabilizer lengthsd) Conservatively plugged as a defense in depth action per Westinghouse recommendation (Ref. 23)Attachment 3 PAGE 12 of 16Page 15 of 19 NECP Number 800873488 Rev 0 ASC No. D0062286Page 40 of 43U2 NECP 800873488RSG 2E-089 Tube Plugging/Stabilizing UstaRow Col Plug Stab Type? Stab Length (in) Reason114 90 Yes Split Note c Preventative -FSW116 90 Yes Split Note c Preventative -FSW118 90 Yes Split Note c Preventative -FSW130 90 Yes Split Note c Preventative -FSW132 90 Yes Split Note c Preventative -FSW134 90 Yes Split Note c Preventative -FSW99 91 Yes Split Note c Preventative -FSW105 91 Yes Split Note c Preventative -FSW107 91 Yes Split Note c Preventative -FSW109 91 Yes Split Note c Preventative -FSW113 91 Yes Split Note c Preventative -FSW115 91 Yes Split Note c Preventative -FSW117 91 Yes Split Note c Preventative -FSW123 91 Yes Split Note c Preventative -FSW98 92 Yes Split Note c Preventative -FSW104 92 Yes Split Note c Preventative -FSW108 92 Yes Split Note c Preventative -FSW114 92 Yes Split Note c Preventative- FSW116 92 Yes Split Note c Preventative -FSW103 93 Yes Split Note c Preventative -FSW115 93 Yes Split Note c Preventative -FSW102 94 Yes Split Note c Preventative -FSW114 94 Yes Split Note c Preventative -FSW116 94 Yes Split Note c Preventative -FSW103 95 Yes Split Note c Preventative -FSW105 95 Yes Split Note c Preventative -FSW107 95 Yes Split Note c Preventative -FSW109 95 Yes Split Note c Preventative -FSW115 95 Yes Split Note c Preventative -FSW109 97 Yes Split Note c Preventative -FSW110 98 Yes Split Note c Preventative -FSW112 98 Yes Split Note c Preventative -FSW80 68 Yes Split Note c Preventative -FSWd104 72 Yes Split Nate c Preventative -FSWd132 94 Yes Split Note c Preventative -FSWda) From AREVA Steam Generator Eddy Current Final Report -San Onofre Nuclear Generating Station(SONGS) Unit 2 -Steam Generators 88 &89 -2012-UJ2C17 & Return to Serviceb) Single stabilizers are installed on the hot side of the tube, split stabilizers are installed on the hot and coldside of the tubec) See AREVA Product Information Sheet for Stabiizer U-Bend (Ref. 15) for split stabilizer lengthsd) Conservatively plugged as a defense in depth action per Westinghouse recommendation (Ref. 23)Attachment 3 PAGE 13 of 16Page 16 of 19 NECP Number 800873488 Rev 0 ASC No. D0062286Page 41 of 43 /U2 NECP 800873488RSG 2E-089 Tube Plugging/Stabilizing UstaRow Col Plug Stab Typeb Stab Length (in) Reason108 34 Yes None -Preventative -Retainer Bar110 34 Yes Single 668 Preventative -Retainer Bar111 35 Yes None -Preventative -Retainer Bar109 35 Yes Single 668 Preventative -Retainer Bar110 36 Yes None -Preventative -Retainer Bar112 36 Yes None Preventative -Retainer Bar111 37 Yes None Preventative -Retainer Bar113 37 Yes None Preventative -Retainer Bar112 38 Yes None Preventative -Retainer Bar114 38 Yes None Preventative -Retainer Bar113 39 Yes None Preventative -Retainer Bar115 39 Yes None Preventative -Retainer Bar114 40 Yes None Preventative -Retainer Bar116 40 Yes None Preventative -Retainer Bar115 41 Yes None Preventative -Retainer Bar117 41 Yes None Preventative -Retainer Bar116 42 Yes None Preventative -Retainer Bar118 42 Yes None Preventative -Retainer Bar117 43 Yes None Preventative -Retainer Bar119 43 Yes None Preventative -Retainer Bar120 44 Yes None -Preventative -Retainer Bar118 44 Yes Single 668 Preventative -Retainer Bar119 45 Yes None -Preventative -Retainer Bar121 4S Yes Single 668 Preventative -Retainer Bar122 46 Yes None -Preventative -Retainer Bar120 46 Yes Single 668 Preventative -Retainer Bar121 47 Yes None -Preventative -Retainer Bar123 47 Yes None Preventative -Retainer Bar122 48 Yes None Preventative -Retainer Bar124 48 Yes None Preventative -Retainer Bar123 49 Yes None Preventative -Retainer Bar125 49 Yes None Preventative -Retainer Bar124 50 Yes None Preventative -Retainer Bar126 50 Yes None Preventative -Retainer Bar125 51 Yes None Preventative -Retainer Bara) From AREVA Steam Generator Eddy Current Final Report -San Onofre Nuclear Generating Station(SONGS) Unit 2 -Steam Generators 88 & 89 -2012-U2C17 & Return to Serviceb) Single stabilizers are installed on the hot side of the tube, split stabilizers are installed on the hot and coldside of the tubec) See AREVA Product Information Sheet for Stabilizer U-Bend (Ref. 15) for split stabilizer lengthsd) Conservatively plugged as a defense in depth action per Westinghouse recommendation (Ref. 23)Attachment 3 PAGE 14 of 16Page 17 of 19 NECP Number 800873488 Rev 0ASC No. D0062286Page 42 of 43 1ASC No D0062286U2 NECP 800873488RSG 2E-089 Tube Plugging/Stabilizing UstaRow Col Plug Stab Type b Stab Length (in) Reason127 51 Yes None Preventative -Retainer Bar126 52 Yes None Preventative -Retainer Bar128 52 Yes None Preventative -Retainer Bar127 53 Yes None Preventative -Retainer Bar129 53 Yes None Preventative -Retainer Bar128 54 Yes None Preventative -Retainer Bar130 54 Yes None Preventative -Retainer Bar129 55 Yes None Preventative -Retainer Bar131 55 Yes None -Preventative -Retainer Bar130 56 Yes Single 668 Preventative -Retainer Bar132 56 Yes Single 668 Preventative -Retainer Bar131 57 Yes None Preventative -Retainer Bar131 121 Yes None -Preventative -Retainer Bar130 122 Yes Single 668 Preventative -Retainer Bar132 122 Yes Single 668 Preventative -Retainer Bar129 123 Yes None -Preventative -Retainer Bar131 123 Yes None Preventative -Retainer Bar128 124 Yes None Preventative -Retainer Bar130 124 Yes None Preventative -Retainer Bar127 125 Yes None Preventative -Retainer Bar129 125 Yes None Preventative -Retainer Bar126 126 Yes None Preventative -Retainer Bar128 126 Yes None Preventative -Retainer Bar125 127 Yes None Preventative -Retainer Bar124 128 Yes None Preventative -Retainer Bar126 128 Yes None Preventative -Retainer Bar123 129 Yes None Preventative -Retainer Bar125 129 Yes None Preventative -Retainer Bar122 130 Yes None Preventative -Retainer Bar124 130 Yes None Preventative -Retainer Bar121 131 Yes None Preventative -Retainer Bar123 131 Yes None Preventative -Retainer Bar122 132 Yes None -Preventative -Retainer Bar120 132 Yes Single 668 Preventative -Retainer Bar121 133 Yes Single 668 Preventative -Retainer Bara) From AREVA Steam Generator Eddy Current Final Report -San Onofre Nuclear Generating Station(SONGS) Unit 2 -Steam Generators 88 & 89 -2012-U2C17 & Return to Serviceb) Single stabilizers are installed on the hot side of the tube, split stabilizers are installed on the hot and coldside of the tubec) See AREVA Product Information Sheet for Stabilizer U-Bend (Ref. 15) for split stabilizer lengthsd) Conservatively plugged as a defense in depth action per Westinghouse recommendation (Ref. 23)Attachment 3 PAGE 15 of 16Page 18 of 19 NECP Number 800873488 Rev 0 ASC No. D0062286Page 43 of 43 1U2 NECP 800873488RSG 2E-089 Tube Plugging/Stabilizing UstaRow Col Plug StabTypeb Stab Length (in) Reason118 134 Yes None Preventative -Retainer Bar120 134 Yes None Preventative -Retainer Bar117 135 Yes None Preventative -Retainer Bar119 135 Yes None Preventative -Retainer Bar116 136 Yes None Preventative -Retainer Bar118 136 Yes None Preventative -Retainer Bar115 137 Yes None Preventative -Retainer Bar117 137 Yes None Preventative -Retainer Bar114 138 Yes None Preventative -Retainer Bar116 138 Yes None Preventative -Retainer Bar113 139 Yes None Preventative -Retainer Bar115 139 Yes None Preventative -Retainer Bar112 140 Yes None Preventative -Retainer Bar114 140 Yes None Preventative -Retainer Bar111 141 Yes None Preventative -Retainer Bar113 141 Yes None Preventative -Retainer Bar110 142 Yes None Preventative -Retainer Bar112 142 Yes None Preventative -Retainer Bar111 143 Yes None -Preventative -Retainer Bar109 143 Yes Single 668 Preventative -Retainer Bar108 144 Yes None Preventative -Retainer Bar110 144 Yes Single 668 Preventative -Retainer Bar98 76 Yes Split Note c Wear at 6 Continuous AVBs87 79 Yes Split Note c Wear at 6 Continuous AVBs89 83 Yes Split Note c Wear at 6 Continuous AVBs122 84 Yes Split Note c Wear at 6 Continuous AVys121 89 Yes Split Note c Wear at 6 Continuous AVBs120 90 Yes Split Note c Wear at 6 Continuous AVBsa) From AREVA Steam Generator Eddy Current Final Report -San Onofre Nuclear Generating Station(SONGS) Unit 2 -Steam Generators 88 & 89-2012-U2C17 & Return to Serviceb) Single stabilizers are installed on the hot side of the tube, split stabilizers are installed on the hot and coldside of the tubec) See AREVA Product Information Sheet for Stabilizer U-Bend (Ref. 15) for split stabilizer lengthsd) Conservatively plugged as a defense in depth action per Westinghouse recommendation (Ref. 23)Attachment 3 PAGE 16 of 16Page 19 of 19
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