ML18153A873

Annual Steam Generator ISI Rept

ML18153A873
Person / Time
Site:	Surry
Issue date:	02/23/1994
From:	VIRGINIA POWER (VIRGINIA ELECTRIC & POWER CO.)
To:
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ML18153A872	List: ML18153A871 ML18153A873
References
NUDOCS 9403070285
Download: ML18153A873 (14)

Text

ATTACHMENT 1 VIRGINIA ELECTRIC AND POWER COMPANY SURRY POWER STATION UNIT 2 1993 ANNUAL STEAM GENERATOR INSERVICE INSPECTION REPORT VIRGINIA ELECTRIC AND POWER COMPANY

~ 9403070285 940223 i *~

. PDR ADOCK 05000280 Q

PDR: -

SURRY UNIT 2, APRIL 1993 RFO S/G "B", EDDY CURRENT EXAMINATION

SUMMARY

In Steam Generator "B", 3342 tubes were inspected full length with bobbin probes. Supplemental examinations were also performed using Rotating Pancake probes where additional confirmatory or other data was desired.

This included an examination of 301 tubes in the top of the tubesheet transition area.

Of the tubes inspected, 91 tubes contained one or more indications.

Two tubes were preventively plugged for anti-vibration bar wear. Including the plugged tubes, 30 tubes had indications between 20% and 29% through wall, 45 tubes had indications between 10% and 19% through wall, 20 tubes with 21 SAA signals, one tube with a PVN signal and one tube with a DRI signal.

See the attached list for details.

e SURRY UNIT 2, APRIL 1993 STEAM GENERATOR "B" EDDY CURRENT EXAMINATION INDICATION LIST ROW COL LOCN IND REMARKS 15 9

6H 16 18 9

7C SAA 3

10 7C 22 16 11 5C 14 21 11 6H 13 4

12 4H 13 30 15 5H 14 28 16 4C 25 7

17 2C PVN 12 19 6C 21 13 19 6H 16 2

23 4C 17 30 26 2H 15 15 27 6H 11 17 27 lH 17 3

28 TSH SAA 13 28 6H 22 28 31 6H 28 43 31 2C 29 18 35 3H 27 2

36 lC 10 3

36 2H 19 Page 1 of s

SURRY UNIT 2, APRIL 1993 STEAM GENERATOR "B" EDDY CURRENT EXAMINATION INDICATION LIST ROW COL LOCN IND REMARKS 19 36 TSC 19 21 36 TSH 15 12 38 6C 19 45 38 7H 11 25 39 4H 15 44 39 lC 10 45 39 lC 17 29 40 6H 19 13 41 lH 11 12 42 TSH SAA 26 42 2H 16 10 43 TSC 10 13 43 lH 25 42 44 4H 15 34 45 6H 15 7

46 TSH SAA 14 46 6C 18 34 46 BPC 14 32 47 4C 15 40 47 3C 21 3

48 2C 16 23 48 2C 24 Page 2 of 5

SURRY UNIT 2 1 APRIL 1993 STEAM GENERATOR 11B11 EDDY CURRENT EXAMINATION INDICATION LIST ROW COL LOCN IND REMARKS 45 48 6H SAA 9

50 4H 16 19 50 TSH SAA 44 50 6H 13 1

56 TSH 25 9

56 6C 20 9

56 TSH SAA 36 56 2C 14 41 56 lC 23 3

57 TSC SAA 17 57 5H 24 17 57 4C 16 25 57 6C 10 41 57 4C 26 34 58 4C 23 36 58 2C 22 41 58 6C 17 42 58 lH 11 4

59 4C 18 4

59 TSC SAA 30 59 2C 22 32 59 6C 27 38 59 4C 12 Page 3 of 5

SURRY UNIT 2, APRIL 1993 STEAM GENERATOR "B" EDDY CURRENT EXAMINATION INDICATION LIST ROW COL LOCN IND REMARKS 24 60 2C 27 40 60 AV3 20 plugged*

1 61 3H SAA 3

61 7H SAA 3

62 TSH SAA 3

62 3H SAA 38 62 7H SAA 20 63 7H SAA 33 63 AV2 20 plugged*

33 63 AV3 14 3

64 4C 18 12 64 TSH SAA 4

65 6C 29 12 65 4C 13 32 65 TEH DRI 32 65 7H 22 3

66

-TSH SAA 22 66 2C 27 2

67 lH 22 2

67 6H SAA 1

68 TSH SAA 20 69 lC 11 4

72 2C 29 37 74 4C 13 Page 4 of 5

SURRY UNIT 2, APRIL 1993 STEAM GENERATOR "B" EDDY CURRENT EXAMINATION INDICATION LIST ROW COL LOCN IND REMARKS 3

80 4C 27 19 80 7H SAA 2

83 3C 24 13 84 3C 14 18 87 5C 21 20 87 6C 10 15 89 lC SAA These tubes were preventively plugged.

Page 5 of 5

e ATTACHMENT 2 GLOSSARY OF TERMS SURRY POWER STATION ANNUAL STEAM GENERATOR INSERVICE INSPECTION REPORT VIRGINIA ELECTRIC AND POWER COMPANY

1.

VIRGINIA ELECTRIC AND POWER COMPANY STEAM GENERATOR EDDY CURRENT TUBE INSPECTION GLOSSARY OF TERMS

ROW, COL COLUMN tube identifier numbers coordinate system.

an X-Y

2.

IND INDICATION Character codes and numerics that represent the analysis results of the data for that tube, e.g.,

SAA, 25%,

etc.

3.

INF Indication Not Found Indicates that a

4.

previously reported Indication, from current inspection data or historical data, is not found in the data being analyzed - also used to address the case where a tube/

signal is being retested for positive identification (PID) and the retest data does not show any signal present.

LOCN LOCATION The location in the tube of the INDICATION called.

5.

DR!

DISTORTED ROLL TRANSITION INDICATION - A possible tube wall loss condition that is unquantifiable with a numeric percent call due to the signal characteristics and is located at the roll transition - often retested with RPC (Rotating Pancake Coil Probe).

6.

55 A number in the indication column shows the%

through wall depth of the indication.

7.

PVN PERMEABILITY VARIATION A variance in the tube permeability that produces a signal that can mask other signals of interest.

8.

SAA SINGLE AXIAL ANOMALY Describes a single axially 9

10.

11.

12.

13.

oriented anomaly signal from RPC (Rotating Pancake Probe) data. The anomaly is based on metallurgical evaluation of tube pull data and is caused by lift-off from a slight inside diameter depression in the tube.

TEH Tube End Hot leg.

TEC Tube End Cold leg.

TSH Top of Tube sheet Hot leg.

TSC Top of Tube sheet Cold leg.

BPH, BPC Baffle Plate Hot Leg and Cold Leg 1

e VIRGINIA ELECTRIC AND POWER COMPANY STEAM GENERATOR EDDY CURRENT TUBE INSPECTION GLOSSARY OF TERMS

14.

1. C,

1. H

(#=number) of Support Plate Hot or Cold leg.

e.g., 3H, 6H, 7C.

15.

AVl, AV2, AV3, AV4 Anti-Vibration Bars 1 through 4.

Note: Where no comment appears in the remarks column the tube is still in service.

2

e ATTACHMENT 3 VIRGINIA ELECTRIC AND POWER COMPANY SURRY POWER STATION UNIT 2 TUBESHEET MAPS VIRGINIA ELECTRIC AND POWER COMPANY

S/G B TUBES TO BE PLUGGED X : 2 TUBES TO BE PLUGGED.

Surry Unit 2 03-29-1993

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COLO LEG BOBBIN INDICATION DISTRIBUTION Surry Unit 2 03-29-1993 VIR-8 SERIES 51F 08:09 HRS.

SUPERTUBIN

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