ML18153C917

Forwards 1991 Annual Steam Generator Inservice Insp Rept for Surry Unit 2

ML18153C917
Person / Time
Site:	Surry
Issue date:	02/28/1992
From:	Stewart W Virginia Power (Virginia Electric & Power Co)
To:	NRC/IRM
Shared Package
ML18153C918	List: ML18153C917 ML20094H027
References
92-098, 92-98, NUDOCS 9203060254
Download: ML18153C917 (8)

Text

{{#Wiki_filter:-------------------------- ACCELERATED DISTRIBUTION DEMONSTRATION SYSTEM "{* ~ REGULAT. INFORMATION DISTRIBUTIOAIYSTEM (RIDS) AC(ES!~-r6N NBR: 92030.60254 - DOC. DATE: 9 2/02/28 NOTARIZED: NO FACIL:50-281 Surry Power Station, Unit 2, Virginia Electric & Powe AUTH.NAME AUTHOR AFFILIATION STEWART,W.L. Virginia Power (Virginia Electric & Power Co.) RECIP.NAME RECIPIENT AFFILIATION Document Control Branch (Document Control Desk)

SUBJECT:

Forwards 11 1991 Annual Steam Generator Inservice Insp Rept for Surry Unit 2." DOCKET# 05000281 DISTRIBUTION CODE: A047D COPIES RECEIVED:LTR t ENCL ( SIZE: /-/--~ ' TITLE: OR Submittal: Inservice Inspection/Testing/Relief from ASME Code R I D NOTES:lcy NMSS/IMSB/PM. RECIPIENT ID CODE/NAME PD2-2 LA BUCKLEY,B INTERNAL: ACRS NRR/DET/EMEB 7E ~m:l:b, 01 RES/DSIR/EIB EXTERNAL: EG&G BROWN,B NRC PDR NOTES: COPIES LTTR ENCL 1 0 2 2 6 1 1 1 1 1 1 1 6 1 0 1 1 1 1 1 NOTE TO ALL "RIDS" RECIPIENTS: RECIPIENT ID CODE/NAME PD2-2 PD NRR/DET/ECMB 9H NUDOCS-ABSTRACT OGC/HDS2 RES MILLMAN,G EG&G RANSOME,C NSIC COPIES LTTR ENCL 1 1 1 1 1 1 1 1 1 1 0 1 1 1 PLEASE HELP US TO REDUCE WASTE! CONTACT THE DOCUMENT CONTROL DESK, ROOM Pl-37 (EXT. 20079) TO ELIMINATE YOUR NAME FROM DISTRIBUTION LISTS FOR DOCUMENTS YOU DON'T NEED! TOTAL NUMBER OF COPIES REQUIRED: LTTR 23 ENCL 20 05000281 S I A D D s R I D s I A D D s

I. VIRGINIA. ELECTRIC AND POWER COMPANY RICHMOND, VIRGINIA 23261 February 28, 1992 United States Nuclear Regulatory Commission Attention: Document Control Desk Washington, D.C. 20555 Gentlemen: VIRGINIA ELECTRIC AND POWER COMPANY SURRY POWER STATION UNITS 1 AND 2 Serial No. NL&P/RPC Docket Nos. License Nos. 92-098 50-280 50-281 DPR-32 DPR-37 1991 ANNUAL STEAM GENERATOR IINSERVICE INSPECTION REPORT In accordance with the requirements of Technical Specification 4.19.F.b, Virginia Electric and Power Company submits herewith the 1991 Steam Generator lnservice Inspection Report for Surry Power Station Units 1 and 2. There is no information provided for Unit 1 because there were no steam generator tube inspections performed for Unit 1 during the calendar year 1991. During the 1991 refueling outage for Surry Power Station Unit 2, the tubes in the "A" and "C" steam generators were examined. The information in Attachment 1 is a summary of the results of those examinations. These results include the number and extent of the tubes examined, location and characterization of each indication of an imperfection, and identification of the tubes that were plugged. Attachment 2 provides a glossary of the terms used in the report. Should you require additional information, please contact us. Very truly yours, A ~;i ),,,-------.1 \\ ~--{--/-*-.**- \\ \\..._,~~ ) (; -~

w. L. sfewart Senior Vice President - Nuclear Attachments

1. 1991 Annual Steam Generator lnservice Inspection Report for Surry Unit 2.

2. Glossary of Terms.

cc: U.S. Nuclear Regulatory Commission Region II 101 Marietta Street, N.W. Suite 2900 Atlanta, Georgia 30323 Mr. M. W. Branch NRC Senior.Resident *inspector S~~ry __l:ower ~ta!)C>_~. __ 9203060254 920228 PDR ADOCK 05000281 R PDR I I

ATTACHMENT 1 VIRGINIA ELECTRIC AND POWER COMPANY SURRY NUCLEAR POV\\fER STATION NO. 2 1991 ANNUAL STEAM GENERATOR INSERVICE INSPECTION REPORT VIRGINIA ELECTRIC AND POWER COMPANY 9203060258 920228 PDR-ADOCK 0~000281 R PDR --- -~-/

~.. REFUELING OUTAGE - APRIL 1991 SURRY UNIT.2 STEAM GENERATOR "A" EXAMINATION

SUMMARY

In "A" Steam Generator 1180 tubes were examined full length (tube end to tube end) with bobbin probes. This is approximately 35% of the available tubes. Of the tubes examined, two had indications between 10% and 19% through wall, one had a indication between 20% and 29% through wall, five had indications between 30% and 39% through wall, two were characterized as "Manufacturing Buff Marks" and four were characterized as "Indication Not Reportable." Refer to the table below for details. No tubes were plugged as a result of this inspection. However, one tube (R41, C28) that was previously plugged was replugged in response to NRC Bulletin 89-01 concerns. Another tube (R41, C27) previously plugged was deplugged, tested, and returned to service. Ind. Location Row-Column MBM 4H R36C20 32 7H R31C27 INR 6C R42C34 33 TSC R6C38 35 6C R12C39 32 6C R12C41 INR 6H R45C47 MBM 1C R45C48 30 3C R36C51 INR 7H R12C63 INR AV4 R32C79 10 6C R11C87 10 6C R12C87 25 1C R12C92 Page 1 of 2

REFUELING OUTAGE - 1991 SURRY UNIT NO. 2, STEAM GENERATOR "C" EXAMINATION

SUMMARY

In "C" Steam Generator 1175 tubes were examined full length (tube end to tube end) with bobbin probes. This represents approximately 35% of the available tubes. Of the tubes examined, five had indications between 10% and 19% through wall, six had indications between 20% and 29% through wall, ten had indications between 30% and 39% through wall, and four were characterized as "Indication Not Reportable." Refer to the table below for details. Ind. Location Row-Column 29 6H R34C16 36 6C R18C18 31 6C R22C22 26 6H R14C26 30 AV4 R43C31 37 SC R27C41 34 4H R27C41 33 SC R35C44 13 AV3 R46C48 27 AV4 R28C49 35 6C R45C53 19 AV3 R40C54 23 AV3 R17C56 17 3H R40C62 13 6C R42C62 19 AV4 R40C63 21 2C R14C66 INR 3H R23C71 34 BPC R18C82 32 3C R25C84 39 3H R24C86 INR 7H R2C88 INR 7H R2C90 31 3C R15C90 24 3H R12C91 INR 7H R2C92 Page 2 of 2

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

~' VIRGINIA ELECTRIC AND POWER COMPANY ANNUAL STEAM GENERATOR REPORT EDDY CURRENT TUBE INSPECTION GLOSSARY OF TERMS

1)

COi - Circumferentially Oriented Indication - describes a circumferentially oriented indication signal from Rotating Pancake probe data - either single or multiple signals - SCI or MCI will be used if it is possible to clearly detect the number of signals present.

2)

DI Distorted indication a possible tube wall loss condition that is unquantifiable with a numeric percent call due to the existing signal characteristics.

3)

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 (PIO) and the retest data does not show any signal present.

4)

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.

5)

MAI - Multiple Axial Indication - describes multiple axially oriented indication signals from Rotating Pancake probe data.

6)

MCI Multiple Circumferentially oriented Indication - describes multiple circumferentially oriented indication signals from Rotating Pancake probe data - COi is used if it is impossible to clearly detect the number of signals present.

7)

Pl - Possible Indication (retest) - generally used with 8x1 analysis, so*metimes with bobbin analysis - describes a potential wall loss condition signal that typically requires a retest for verification - sometimes retested with a special probe, e.g., MRPC, etc.

8)

SAi - Single Axial Indication - describes a single axially oriented signal from Rotating Pancake probe data. Page 1 of 2

..., ~1-**' '*"'"',... VIRGINIA ELECTRIC AND POWER COMPANY ANNUAL STEAM GENERATOR REPORT EDDY CURRENT TUBE INSPECTION GLOSSARY OF TERMS

9)

SCI Single Circumferentially oriented Indication describes a single circumferentially oriented indication signal from Rotating Pancake probe data - COi is used if it is impossible to clearly detect the number of signals present.

10) 55 -

A number in the indication column shows the % thru wall depth of the indication.

11)

TEH - Tube End Hot leg.

12)

TEC - Tube End Cold leg.

13)

TSH - Top of Tubesheet Hot leg.

14)

TSC - Top of Tubesheet Cold leg.

15)

1. C, #H - (#=number) of Support Plate Hot or Cold leg. e.g., 3H, 6H, 7C.

16)

AV1, AV2, AV3, AV4 - Anti-Vibration Bars 1 thru 4.

17)

MBM - Manufacturing Buff Mark - a tube wall loss condition due to a tube manufacturing process step - generally a long and shallow loss area - remains constant and does not present any operating problems for the tube - noted for reference only.

18)

BPC - Baffle Plate Cold leg. Page 2 of 2}}