ML070260395

Summary of Conference Telephone Call Regarding the Spring 2006 Steam Generator Inspections - Handouts

ML070260395
Person / Time
Site:	Davis Besse
Issue date:	01/31/2007
From:	FirstEnergy Nuclear Operating Co
To:	Office of Nuclear Reactor Regulation
Wengert, Thomas
Shared Package
ML070260225	List: ML070260212 ML070260395
References
TAC MD0529
Download: ML070260395 (6)

Text

Davis-Besse 14RFO Eddy Current Exam Scope S/G 2-A S/G 1-B Total nspection of all new re-rolls 100 50 150 Periphery Gap Analysis

• Tech Spec Requirement 379 406 785 Full length bobbin examination of all in-service non-sleeved tubes. Sleeved tubes were inspected from LTE to bottom of 14888, 15220 30108 Full length bobbin examination of 33% sleeves 66 70 136 Plus Point exam of the expanded sleeve regions (both upper and lower rolls) and parent tube pressure boundary portion just below the lowest sleeve roll, extending approximately 6 inches past the sleeve of 33% of the sleeves 66 70 136 Plus Point exam of the expanded sleeve regions and parent tube pressure boundary portion just below the lowest sleeve roll, extending approximately 6 inches past the sleeve of 67% of the 133 142 275 Plus Point and Pancake inspection of non-sleeved in-service stress relieved upper tube roll expansions (79%) and Plus point and pancake coil examination of all of.the non-stress-relieved tube upper roll expansions and tube ends -factory re-rolls (5 tubes) and repair rolls (114 tubes) 11604 11856 23460 Plus point and pancake coil examination of 21% of the non-sleeved in-service tubes in the upper tube sheet region from tube end including tube end and upper roll expansions to Upper tube 3085 3152 6237 Plus Point and Pancake inspection of in-service stress relieved lower tube roll expansions in S/G A 33%. 4913 N/A 4913 Plus Point and Pancake inspection of in-service stress relieved lower tube roll expansions in S/G 1-B1 00%. N/A 15220 15220 Plus point and pancake coil examination of the tubes bordering the sleeve region (165 sleeves) 91 81 172 Plus point and pancake coil examination of all of the flaw-like indications reported from bobbin 600 400 1000 Plus point and pancake coil examination of all dent indications (100% sample of all previously reported and new dents using a 2.5 volt bobbin threshold) 253 205 458 Plus point and pancake coil examination of all dent indications greater than 0.5 volts between 15S and UTS in the periphery 16 8 24 Plus point and pancake coil sample inspection of lower tubesheet sludge pile region tubes 986 1120 2106 Sleeve Bobbin .inspection of all previously identified gross mean distortions (42 tubes) 0 42 42 Plus Point and pancake coil inspection of 33% of the sleeve gross mean distortions and 100% of the non-sleeve gross mean 0 16 16 Plus Point inspection of 33% of the Hot Leg rolled Plugs 183 76 259 Visual Welded Plug Exam (VT-1) (0 during 14 Mid-Cycle) 33 19 52 Visual Plug exams of all Plugs in Upper and Lower 1138 474 1612 38534 48627 87161

03/21,'2006 11:38 FAX 419 249 2478 DB PROCURNIENT [aoo1j Davis-Besse 14 RFO March 2006 Axial Indications Ax SG Count Row Tube Ind Volts TSP Inchi Probe Depth Length Deg. Mode 2-A 1 151 13 SAI 0.49 15S 2.78 520PP 40 1.30 Groove IGA 2-A 2 150 21 SAI 0.39 15s -5.2 520PP 34 1.48 Groove IGA 2-A 3 87 122 SAI 0.34 UTE -1.68 520PP 86 0.26 Roll Trans PWSCC 2-A 4 58 1 SAI 0.23 15S -2.93 520PP 53 0.48 Groove IGA 2-A 5 `S0 17 SAI 0.18 15S -3.74 520PP 0 0.88 Groove IGA 2-A 6 151 12 SAI 0.18 15S 2.24 520PP 0 0.46 Groove IGA 2-A 7 151 15 SAI 0.16 15S 2.64 520PP 14 0.37 Groove IGA 2-A B 151 15 SAI 0.09 ISS 3.69 520PP 32 0.22 Groove IGA 2-A 9 151 15 SAI 0.06 158 4.7 520PP 28 .0.15 Groove IGA 1-1 10 56 104 SAI 2.25 UTE -1.48 520PP 97 0.26 Roll Trans PWSCC 1-S 11 79 57 SAI 0.50 UTE -1.13 S20PP 70 0.13 Rofl Trans PWSCC 1-8 12 109 74 SAI 0.35 UTE -1.39 520PP 68 0.16 Roll Trans PWSCC 1-8 13 141 65 MAI 0.26 15S -0.83 520PP 41 5.15 Groove IGA 1-B 14 143 62 SAI 0.20 15S -4.88 520PP 25 0.85 Groove IGA 1-B 15 64 1 SAI 0.18 15S -1.03 520PP 33 0.70 Groove IGA 1-B 16 25 97 MAI.- 0.14 15S -1.25 520PP 84 0.50 Groove IGA 1-8 17 83 1 SAI 0.12 ISS -1.81 520PP 31 0.13 Groove IGA 1-B 18 64 1 SAI 0.12 155 -3.19 520PP 25 0.42 Groove IGA 1-8 19 63 1 SAI 0.08 155 -2.12 520PP 18 0.13 Groove IGA Results as Of 8:58 AM, 3/21/2006

03o"21/2008 11:38 FAX 419 249 2478 DB PROCURMENT i o002 Davis-Besse 14 RFO March 2006 Circumferential Indications (Not in Prev Rerolled Tubes)

SG Count[ Row I Tube Ind , Volts TSP Inchl I Probe I Depth ICircExti Deg. Mode 2-A 11f 35 11 SCIf 1.64 1 UTE -0.23 1520PP 7I 0.19 Tube End PWSCC 2-A . 1 38 5 SCI 0.50 UTE -0.32 ,52oPPI 41 0.16 Tube End PWSCC 1-B 1 81 74 SCI 0.67 LTE 1.57 520PP 72 0.17 PWSCC In Heel SRR 1-B 1 84 82 SCI 1.09 UTE -0.16 520PP 93 0.28 Tube End PWSCC

- J-Results as of 8:57 AM, 3/21/2006

03,21/2008 11:39 FAX 419 249 2478 DB PROCUMENT 0003 Davis-Besse 14 RFO March 2006 Volumetric Indications (Not in Previously Rerolled Tubes)

SG Row Tube Ind Voit TSP inchlI Probe Depth Ax Len Circ Len Deg. Mode 1-B 105 119 SVI 0.23 UTS 8.25 520PP 38 0.13 0.10 OD IGAin UpperTS

~f1_~.LJ iIII _I__

Results as ot 8:58 AM, 03104/02

03/21/2008 11:39 FAX 419 249 2478 DB PROCURKENT o004 Davis-Besse 14 RFO March 2006 New Tube End Indications (Not in Previously Rerolled Tubes)

S CountI Row I Tube Ind I Volts I TSP I Inchl I Probe 1-B 1 29 66 MAA 2.05 UTE -0.34 520PP 1-B 2 30 14 SAA 1.59 UTE -0.29 520PP I-B 3 35 88 SAA 1.39 UTE -0.28 520PP 1-1 4 36 91 SAA 1.10, UTE -0.29 520PP 1-B 5 40 104 SAA 2.08 UTE -0.34 520PP 1-B 6 43 92 SAA 2.33 UTE -0.27 520PP 1-B 7 43 108 SAA 1.09 UTE -0.29 520PP 1-B 8 89 126 SAA 1.91 UTE -0.31 520PP 2-A 9 21 49 SAA 0.77 UTE -0.23 520PP 2-A 10 24 51 SAA 0.54 UTE -0.30 520PP 2-A 11 26 80 SAA 1.31 UTE -0.27 520PP 2-A 12 32 83 SAA 2.02 UTE -0.39 520PP 2-A 13 59 1 SAA 1.41 UTE -0.28 520PP 2-A 14 80 12 SAA 1.43 UTE -0.28 520PP 2-A 15 85 31 SAA 1.21 UTE -0.26 520PP 2-A 18 92 3 SAA 0.61 UTE -0.26 520PP 2-A 17 112 87 SAA 1.63 UTE -0.42 520PP 2-A 18 116 111 MAA 0.86 u.TE -0.32 520PP 2-A 19 125 14 SAA 1.02 UTE -0.22 520PP Page 1 of I Results as of 8:58 AM, 3/21/2006

03/21/2006 11:39 FAX 419 249 2478 DB PROCURDIENT io0O5 Davis-Besse 14 RFO January 2006 Top 10 Wear Calls By Bobbin Depth SG Row Tube Depth Volts TSP Inch1 Prev Depth 2-A 16 2 24 1.05 13S -0.71 23 2-A 147 36 22 1.12 lOS 0.70 27 1-B 67 1 21 1.08 12S -0.02 17 2-A 146 34 19 0.88 105 0.61 16 2-A 150 27 18 0.95 10S -0.79 16 2-A 146 33 17 0.87 10S 0.64 18 1-B 14 74 18 0.62 12S -0.21 14 2-A 13 1 15 0.68 13S -0.75 - 9 2-A 151 15 15 0.67 13S -0.78 11 2-A 12 1 14 0,66 13S -0.70 19 Results as ot 8:58 AM, 3/21/2006