ML062370008

SG Tube Inspection Summary, Table 2 & 3

ML062370008
Person / Time
Site:	Diablo Canyon
Issue date:	05/02/2006
From:	NRC/NRR/ADRO/DORL/LPLIV
To:
Wang, A., DORL/LPLIV, 415-1445
Shared Package
ML062370004	List: ML062150446 ML062370007 ML062370008
References
Download: ML062370008 (2)

Text

Table 2 Repairable Indication and Tube Status Report TubeDegradation2-12-22-32-4 Number of DIS @ <2v DNT (Excludes known flaws)39456632182 DIS Overcall Rate100%100%100%100%100%

1. of Confirmed SAI-ID in Above DIS00000 Axial PWSCC (New Inds)224 Axial PWSCC (Repeat Inds)444553 DENTED TSP Wedge Region Axial ID/Axial OD 22 Circ PWSCC 11 Circ ODSCC1010 Mixed Mode Axial OD/Circ Mixed Mode Axial ID/Circ 22 Fail PWSCC ARC OA Burst Fail PWSCC ARC DOP >=40% TW 22 Repairable Tubes0140317 DOS > 2.0 V (Inds)2132632 DOS =< 2.0 V (Inds)52843431911632444 TSP ODSCC AONDB @ >5 V Dent 22 GL 95-05 ARC Wedge Region 22 Preventive Plugging <2v DOS 11 Repairable Tubes2332937 Axial PWSCC (New) 22 Axial PWSCC (Repeat)155202666 Axial PWSCC Failed W* Criteria123 Tubesheet Circ PWSCC @ TTS Circ ODSCC @ TTS112 Repairable Tubes11125 Circ PWSCC1113 Outermost Row with DegradationR7R7R8High Row U-bendsAVB Wear >=40%

11Cold Leg ThinningThinning >=40%

22PLP/FO WearIndicationsFreespanAxial ODSCC at Straight Leg Ding 11Misc.Preventive Plugged Tubes42253566 Numbers reflect the number of tubes affected with degradation, unless (Inds) is noted.

DIABLO CANYON UNIT 2 R13 U-bends Steam Generator Total Location Total 5/2/2006 6:02 PM DegradationSGRowColLocation Bobbin Volts+Pt Volts Estimated Depth Estimated Length A VB Wea r2223537H + 60.811.91-40%TW-Cold Leg Thinning2242332C - 0.203.87-46%TW-Axial ODSCC @ Ding222351TSC + 39.840.8225%TW0.44 Circ PWSCC in Ubend248257H + 38-0.7966%TW (1)18.5 deg Axial PWSCC @ Dented TSP226311H - 0.33-1.3660%TW0.25" Circ PWSCC @ Dented TSP2411163H - 0.18-0.4479%TW (1)25.9 degCirc: 1H + 0.05-0.16 40%TW24.9 deg Axial: 1H -0.3 to -0.7-0.4748%TW0.13"Axial ODSCC @ TSP247783H - 0.104.162.89--

Circ ODSCC @ TSP2217294H - 0.08-0.5739%TW (1)25.4 deg Circ ODSCC @ Tubesheet222224TSH - 0.05-0.16TBDTBD Axial PWSCC @ Tubesheet (W*)21762TSH - 1.87-4.91TBD0.92 Note: Significance for SCC Indications determined by +Point Voltage, except for bobbin coil ARC, AVB Wear and CLT.

(1) Estimated depth is at maximum +Point amplitude.

(2) Separation distance is 0.24", therefore defined as "interacting", per PWSCC ARC criteria.

DCPP 2R13 (Preliminary Results)

Most Significant Indications Table 3Mixed Mode (ID Axial + Circ) (2)221030 AREVA Tube Integrity Engineering Daily Results: 5/2/2006 6:04 PM