ML20213D075

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Forwards Info Re Steam Generator Inservice Insp & Tube Plugging for Current Refueling Outage Completed on 860307. Approx 3,188 Tubes Inspected in Once-Through Steam Generator a & 8,012 in Once-Through Steam Generator B
ML20213D075
Person / Time
Site: Oconee Duke Energy icon.png
Issue date: 07/22/1986
From: Tucker H
DUKE POWER CO.
To: Grace J
NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II)
References
NUDOCS 8611100414
Download: ML20213D075 (6)


Text

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(J; DUKE POWER GOMPANY 9-P.O. BOX 33180 CHARLOTTE, N.C. 28242 HALB. TUCKER Turmenown vsos resernest (704) 3M534 suas4a emosemenom

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July 22, 1986 bc:

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.Dr. J.. Nelson Grace, Regional Administrator l U.S. Nuclear Regulatory Commission - Region II p l 101 Marietta Street, NW, Suite 2900 m Atlanta, Ga. 30323 -

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Subject:

Oconee Nuclear Station Docket Nos. 50-269 ] , Unit 1

Dear Dr. Grace:

Pursuant to Oconee Nuclear Station Technical Specification 4.17.6(b), Duke Power  !

Company (Duke) is providing the following information concerning the Oconee Unit I steam generator inservice inspection. The inservice inspection and tube plugging l operation for the current Unit I refueling outage was completed on March 7, 1986.

There were approximately 3,188 tubes inspected in the Unit 1 OTSG "A". For Unit 1 OTSG "B", there were approximately 8,012 tubes inspected. The eddy current testing was conducted from the inlet end of the generator and covered the entire length of the tube.

Please find attached (Attachments 1 and 2) lists of tubes located in Oconee Unit 1 OfSGs "A" and "B" respectively which have eddy current indications of tube wall degradation greater than or equal to 20% but less than 40%. Also attached (Attach-ments 3 and 4) are lists d tunes from the same OTSGs which have eddy current indications of tube wall degradation greater than or equal to 40% (the limit for plugging) and which have been plugged.

Very truly yours,

/P Hal B. Tucker PJN/48/jgm Attachments xc: Document Control Desk Ms. Helen Pastis U.S. Nuclear Regulatory Commission Office of Nuclear Reactor Regulation Washington, D.C. 20555 U.S. Nuclear Regulatory Commission Washington, D.C. 20555 Mr. J.C. Bryant NRC Resident Inspector Oconee Nuclear Station 8611100414 860722 [Ig PDR g

ADOCK 05000269 PDR

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., , g Arv iiENT 1 OCONEE-1 A-OTSG i ALL TUBES WITH OD INDICATIONS 220% TW, BOBBIN COIL '

2/86 REFUELING OUTAGE  !

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l ROW-COL OUTAGE ELEVATION INDICATION 7. TW i l

4- 4 2/06 RFO 14 OD (general) 43 47- 5 2/06 RFO 10 -

3. 40"' OD (general) 26 60- 2 2/06 RFO 14 00 (general) 30 66- 3 2/06 RFO 14 + '9.60" OD (general) 28 72- 9 2/06 RFO 14 OD (gwner al ) 41 72- 11 2/06 RFO 14 + 0.50" OD (general) 69 72-126 2/86 RFO 11 + 0.00" OD (general) 24 73- 9 O/86.RFO 14 -

W.59" OD (general) 41 136- 4 2/06 RFO 14 OD (general). 33 4

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k j HMENT 2 OCONEE-1 B-0TSG PAGE 1 OF 2 ALL TUBES WITH OD INDICATIONS >20% TW, BOBBIN COIL 2/86 REFUELING OUTAGE ROW-COL OUTAGE ELEVATION INDICATION 7. TW (7 3- 30 O/06 RFO 10 -

1.10" .OD (

(general) 22 4- 5 O/86 RFU 14 OD (general) 51 5- 7 O/06 RFO 13 OD general) 53 5- 26 O/86 RFO 10 OD (general) 53 7- 49 2/06 RFO 14 OD (general) 82 7- 52 2/06 RFO 14 OD (general) 60 8- 15 O/86 RFO 14 -

0.20" OD (general) 53 8- 17 2/06 RFO 10 -

1.30" OD (general) 42 9- 53 2/86 RFO 9 OD (general) 52 11- 3 O/86 RFO 8 OD (general) 71 13- 5 2/06 RFO 14 OD (general) 54 13- 72 O/86 RFO 14 OD (general) 66 14- 31 O/86 RFO O -

0.10" OD (general) 33 15- 69 2/06 RFO 14 + 0.40" OD (general) 44 17- 80 O/86 RFO 14 + 0.30" OD ( 32 18- 15 O/86 RFO 14 + 0.60" OD (general) 34 01- 50 O/86 RFO 10 OD (general) 59 OO- 28 O/86 RFO 14 + 0.40" 00 (general)

' general) 52 25- 89 O/86 RED 1_4 + 0. Stil" OD ~~2' 1 Eb 08- 72 2/86 RFO 14 OD (5eneral) 44 f08-72 2/06 RFO 14 OD (general) 60 34-101 2/06 RFO 14 + 0.50" OD (ganeral) 37 35- 88 O/86 RFO 14 + 0.10" OD (general) 53 37- 2 O/86 RFO 14 0D (general) 58 41-113 2/86 RFO 14 + 0.00" OD ( 32 1- 3 2/86 RFO 10 OD (general) 55 52-107 2/06 RFO 7 OD (general) 30

.50-107 2/86 RFO 7 + 0.90" OD (general) 50 53- 3 O/06 RFO 13 OD (generall 35 53- 4 O/06 RFO 13 + 0.10" OD (general) 71 58-107 O/06 RFO 12 OD (general) 56 58-107 O/86 RFO 14 + 0.50" OD (general) generall 53 60-128 O/06 RFO 14 + 0.30" OD (general) 44 61- 1 2/06 RFO 13 + 0.30" 00 (general) 08 63- 28 O/86 RFO 15 + 44.90" OD (general) 31 67- 7 O/86 RFO O + 0.40" OD (general) 31 68- 4 2/06 RFO 13 OD (general) 36 68- 7 O/86 RFO 13 OD (general) 62 71- 3 2/06 RFO 14 + 0.30" OD (general) 22

,71-108 O/86 RFO 14 OD (general) 53 72- 3 2/86 RFO 11 -

1.30" OD (general) 41

'. 7 2- 3 2/86 RFO 14 + 0.30" OD (general) 54 74-119 2/06 RFO 13 + 0.20" OD (general) 54 74-100 2/86 RFO 13 OD (general) 30 78-116 O/06 RFO 14 OD (general) 48 80-!!0 2/86 RFO 14 OD (general) 52 81-109 2/86 RFO 11 OD ( 51 86-126 2/06 RFO 14

  • OD (general) 51

.93-102 O/86 RFO 14 OD (general) general) 44 94- 10 2/86 RFO 14 + 0.30" OD (general) 31 94-126 2/86 RFO 14 00 (general) 43 95- 12 O/86 RFO 14 OD (general) 33 95- 13 O/06 RFO 14 OD (general) 29 104-117 O/06 RFO 10 -

1.50" OD (general) 33 105-120 O/86 RFO 14 + 0.30" OD (general) 55 106- 10 O/86 RFO 14 OD (general) 61 107- 9 O/86 RFO 14 OD (general) 33 109- 5 O/86 RFO 9 -

1.00" OD (general) 33 110-111 O/86 RFO 10 OD (general) 45 111- 1 2/86 RFO 12 OD (general) 24 116- 1 2/86 RFO 14 + 7.50" OD (general) 31 116- 5 2/86 RFO 5 OD (general) 29 116-105 2/86 RFO 9. OD (generall 30 It06-111 2/86 RFO 11 -

0.70" OD Wear / Thin 66

'106-111 2/06 RFO 13 -

0.70" OD Wear /Than 43 "196-110 O/06 RFO 11 -

0.80" OD Wear /Than 38 106-112 2/06 RFO 10 -

0.80" OD Wear /Than 45 s 106-112 2/86 RFO 13 -

0.80" OD Wear /Than 45 108-111 O/86 RFO 13 -

0.60" OD Wear /Than 31' 100-113 2/06 RFO 13 -

0.50" OD Weer/Than 37 ig8-114 '/86 RFO 13 -

0.60" OD Wear / Thin 37 1 0- 4 '5 / 8 6 F D - 14 OD (geneeel) 24 100- 57 2/06 RFO 7 OD (general) 4!

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ATTACHMENT 2 CONT'D. .

OCONEE-1 B-OISG .

PAGE 2 OF 2 ALL TUBES WITH OD INDICATIONS 120% TW, BOBBIN COIL 2/86 REFUELING OUTAGE ROW-COL OUTAGE ELEVATION INDICATION 7. TW 122- 2 2/06 RFO 13 + 0.49" UD (

123- 4 2/06 RFO 3 OD (general) 24 24 135- 17 2/06 RFO 13 + 0.99" OD (general) general) 45 137- 17 2/86 RFO 10 + 9.7p" OD (general) 34 137- 18 2/86 RFO 19 OD ( 29 138- 29 2/06 RFO 9 -

1.60' OD (general) general) 52 141- 52 2/86 RFO 10 -

1.50" OD (general) 43 141- 65 2/86 RFO 3 + 0.29" OD (general) 43 142- 52 2/06 RFO 19 OD (general) 27 143- 14 2/86 RFO 9 OD (general) 26 145- 3 2/86 RFO 14 + 0.49" OD (general) 31 146- 5 2/86 RFO 15 + 45.49" OD ( 23 148- 34 2/06 FFO 14 + 9.80" OD (general) general) 25

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g CHtiENT 3 OCONEE-1 A-OTSG ALL TUBES REMOVED FROM SERVICE 2/86 REFUELING OUTAGE NO. -ROW COL

1. 4- 4
2. 72- 9
3. 72- 11
4. 73- 9 S

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OCONEE-1 B-OTSG ALL TUBES REMOVED FROM SERVICE 2/86 REFUELING OUTAGE NO. ROW COL

1. 4- 5
2. 5- 7
3. 5- 26
4. 7- 49
5. 7- 52
6. 8- 15
7. 8- 17
8. 9- 53
9. 11- 3
10. 13- 5
11. 13- 72
12. 15- 69
13. 18- 15
14. 21- 59
15. 22- 28
16. 25- 89
17. 28- 72
18. 35- 88
19. 37- 2
20. 51- 3
21.52-107
22. 53- 3
23. 53- 4
24.58-107
25.58-127
26.60-128
27. 68- 7
28.71-128
29. 72- 3
30. 72- 9
31.74-119
32.78-116
33.80-130
34.81-129
35.86-126
36.93-122
37.94-126
38. 95- 12
39. 105-122
40. 106- 10
41. 109- 5
42. 110-111
43. 120- 57
44. 135- 17
45. 138- 20
46. 141- 52
47. 141- 65 N