ML18153D238

Annual SG Inservice Insp Rept

ML18153D238
Person / Time
Site:	Surry
Issue date:	02/09/1993
From:	VIRGINIA POWER (VIRGINIA ELECTRIC & POWER CO.)
To:
Shared Package
ML18153D237	List: ML18153D236 ML18153D238
References
NUDOCS 9302160133
Download: ML18153D238 (10)

Text

ATTACHMENT 1 VIRGINIA ELECTRIC AND POWER COMPANY SURRY POWER STATION UNIT 1 1992 ANNUAL STEAM GENERATOR INSERVICE INSPECTION REPORT VIRGINIA ELECTRIC AND POWER COMPANY

/ ---9302160133 930209 -- - --,,

PDR ADOCK 05000280 G

PDR

SURRY UNIT 1, MARCH 1992 RFO S/G 11A11,

EDDY CURRENT EXAMINATION

SUMMARY

In Steam Generator "A" 1170 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.

Of the tubes inspected, none displayed rejectable indications, two had indications between 30 and 39%

through wall, three had indications between 20 and 29% through wall and nine had indications between 1 and 19% through wall.

Two tubes were plugged as a precautionary measure.

See attached list for details.

SURRY UNIT 1, MARCH 1992 RFO S/G "A", EDDY CURRENT EXAMINATION

SUMMARY

Row Col Ind Locn Remarks 10 3

MBM BPC 5

4 DNT 7H 5

4 MBM BPC 7

4 MBM 2H 15 6

MBM 3C 9

8 MBM BPH 23 8

MBM lC 7

10 MBM 2C 23 10 25 TSC 1

11 MBM 6C 29 12 MBM 2C 13 14 MBM 6H 25 14 MBM 2C 33 16 18 AV2 3

18 MBM 2C 36 19 17 7H 13 20 DNT 4H Plugged*

13 20 31 4H Plugged*

1 23 MBM lC 37 24 MBM lC 39 25 MBM AVl 40 26 MBM AVl 28 41 35 AV4 Plugged*

1

SURRY UNIT 1, MARCH 1992 RFO S/G "A"' EDDY CURRENT EXAMINATION

SUMMARY

Row Col Ind Locn Remarks 46 44 20 AVl 46 45 15 AVl 37 52 MBM 2H 44 54 MBM lC 45 55 MBM 3C 1

56 INF 2H 7

58 MBM lH 7

58 MBM 3H 31 60 MBM 4H 44 61 INF 6C 11 64 MBM 4C 40 65 INR 7H 40 65 MBM AV2 21 66 MBM 2C 33 66 13 AV2 33 66 MBM 2C 37 66 MBM 3C

\\

\\

15 68 MBM 5C 39 68 MBM lH 40 68 13 AV4 40 69 15 AV4 39 72 MBM BPH 39 72 MBM 4H 31 73 19 6C 31 73 MBM lC 2

SURRY UNIT 1, MARCH 1992 RFO S/G "A"' EDDY CURRENT EXAMINATION

SUMMARY

Row Col Ind Locn Remarks 25 74 MBM 4C 25 74 MBM lC 37 75 INR 2H 37 75 16 AV2 13 76 MMB 3H 36 76 17 AV2 36 76 MBM AV3 22 88 MBM 3H 7

90 INR TSC 14 90 21 2C 8

92 ANR 7H 8

92 MBM lC 11 92 MBM TSH 11 92 ANR 7H 12 92 M'.BM BPC

• Plugged as a precautionary measure, not because of a rejectable indication 3

SURRY UNIT 1, MARCH 1992 RFO S/G "B", EDDY CURRENT EXAMINATION

SUMMARY

In Steam Generator "B" 1170 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.

Of the tubes inspected none were plugged, five had indications between 20 and 29% through wall and four had indications between 1 and 19% through wall.

See the attached list for details.

SURRY UNIT 1, MARCH 1992 RFO S/G "B", EDDY CURRENT EXAMINATION

SUMMARY

Row Col Ind Locn 8

4 MBM 5C 2

13 MBM 4H 27 15 13 TSC 34 17 17 AV4 35 17 12 AV3 17 23 24 6C 36 38 MBM 2H 36 38 MBM 6C 45 41 MBM BPC 11 43 23 6C 6

48 MBM 5C 6

48 25 3C 45 48 15 TSC 27 52 MBM 6C 34 58 23 AV2 28 62 MBM BPC 2

72 MBM 4C 14 90 MBM lC 18 90 28 6C 1

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

VIRGINIA ELECTRIC AND POWER COMPANY STEAM GENERATOR EDDY CURRENT TUBE INSPECTION SURRY UNIT 1 1 MARCH 1992 GLOSSARY OF TERMS

1.

ANR ANOMALY NOT REPORTABLE indicates that an anomaly condition exists in the data being analyzed that is below the reportable criteria threshold for this specific inspection can be used to address anomalies called in previous inspections that are still detectable but fall below current criteria

2.

BPC -

BAFFLE PLATE COLD - Baffle plate on the cold leg side of the steam generator.

3.

BPH -

BAFFLE PLATE HOT - Baffle plate on the hot leg side of the steam generator

4.

DNT DENT reduced diameter often located plate the tube has been deformed inward to a condition from that of a nominal tube at an interface such as a tube support

5.

INF Indication Not Found indicates that a 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.

6.

INR Indication Not Reportable - indicates that a very small tube wall loss condition exists in the data being analyzed that is below the reportable criteria threshold for this specific inspection can be used to address indications called in previous inspections that are still detectable but fall below current criteria.

7.

MBM MANUFACTURERS BUFF MARK a tube wall loss condition due to a tube manufacturing process step generally a relatively long and shallow loss area remains constant and does not present any operating problems for the tube noted for reference only

8.

55 A number in the indication column shows the%

thru wall depth of the indication.

1

_ _J

9.

TEH

10.

TEC

11.

TSH

12.

TSC

13.

1. C, e.g. '

VIRGINIA ELECTRIC AND POWER COMPANY STEAM GENERATOR EDDY CURRENT TUBE INSPECTION SURRY UNIT 1 1 MARCH 1992 GLOSSARY OF TERMS Tube End Hot leg.

Tube End Cold leg.

Top of Tube sheet Hot leg.

Top of Tube sheet Cold leg.

1. H

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

3H, 6H, 7C.

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

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

2