IR 05000331/2004002

Submits Results of 850331-0402 Eddy Current Inservice Insp of Steam Generators 2A & 2B.Steam Generators 2A & 2B Had 141 & 118 Imperfections,Respectively.Areas of Concern Will Be Monitored at Next Eddy Current Exam

ML17215A866
Person / Time
Site:	Duane Arnold
Issue date:	04/29/1985
From:	WILLIAMS J W FLORIDA POWER & LIGHT CO.
To:	MILLER J R Office of Nuclear Reactor Regulation
References
L-185-169, NUDOCS 8505030487
Download: ML17215A866 (4)

Text

'EGULATOR'FORMAT ION DISTRIBUTION S TEM (RIDS)ACCESSION NBR:8505030487 DOC,DATE: 85/04/29'OTARIZED:

NO FACIL:50"389 St, Lucie Plant~Unit 2i Florida Power 8 Light Co.AUTH~NAME AUTHOR AFFILIATION WILLIAMS~J

~N~Florida Power L Light Co, RECIP~NAME RECIPIENT AFFILIATION MILLER',R~Division of Licensing DOCKET 05000389 SUBJECT: Submits resul ts of 850331-0402 eddy cur>ent inservice insp of Steam Generators 2A 8, 2B,Steam Generators 2A 8 28 had 141 118 imperfectionsirespectively

~Areas of concer,n wil l be'onitored at next eddy current exam, DISTRIBUTION CODEo A047D COPIES RECEIVED;LTR ENCL SIZE: I.I TITLE: OR Submittal:

Inservice Inspection/Testing NOTES;OL:04/06/83 05000389 RECIPIENT ID CODE/NAME', NRR ORB3 BC 01 INTERNAL: ACRS 16 ELD/HDS2 NR 4TEB 14 REG I 04 COPIES LTTR ENCL'7 10 10 1 0 1 1 1 RECIPIENT ID CODE/NAME ADM/LFMB NRR/DE/MEB 15 NRR/DL/TAPtlG RGN2 COPIES LTTR ENCL 0 1 1 1 EXTERNAL: LPDR NSIC 03 05 1 1 1 NRC PDR 02 TOTAL NUMBER OF COPIES REQUIRED: LTTR 27 ENCL 25 0 r lf I~i, S l'I Cj<<r FLORIDA POWER&LIGHT COMPANY April 29, 1985 L-85-169 Office of Nuclear Reactor Regulation Attention:

Mr.3ames R.Miller, Chief Division of Licensing U.S.Nuclear Regulatory Commission Washington, D.C.20555

Dear iVlr.Miller:

Ref: St.Lucie Unit 2 Docket No.50-389 Unscheduled Steam Generator Inservice Ins ection Results From March 31, 1985 thru April 2, 1985, FPL performed an unscheduled Eddy Current Inservice Inspection of both Steam Generators for St.Lucie Unit 2.This inspection was performed to address both FPL and industry concerns regarding abnormal wear in the bat wing area and was not required per the plant technical specifications.

The inspection program was designed to bound the area of concern and included inspection of 303 tubes in Steam Generator 2A and 300 tubes in Steam Generator 2B.The 2A Steam Generator had 101 imperfections in 86 tubes and 130 tubes were mechanically plugged.38 tubes, at or above 00%imperfection depth, were plugged.08 tubes found to have imperfection depth less than 00%were plugged.In addition, 08 tubes were preventatively plugged because of the bat wing area concern.The 2B Steam Generator had 118 imperfections in 69 tubes and 130 tubes were mechanically plugged.38 tubes, at or above 00%imperfection depth, were plugged.31 tubes found to have imperfection depth less than 00%were plugged.In addition, 61 tubes were preventatively plugged because of the bat wing area concern.The area of concern.will be monitored at the next Eddy Current Examination to determine f ur ther degradation.

Attached, for your information, please find the summary results of the inspection.

Very truly yours, J.W.Williams, 3r.Group Vice President Nuclear Energy 3WW/SAV/mvt Attachment h cc: Harold F.Reis Dr.3.Nelson Grace PNS-LI-85-170v pDR~OSO487 8504g9~8 N)OC~OSOOOQ89 PDR PEOPLE...SERVING PEOPLE Attachment Summary results of PSL-2 ECT Steam Generator ISI performed from March 31, 1985 thru April 2, 1985.Steam Generator/$2A Total Tubes Tested Total imperfections<20%

'otal Degraded?20

-39%Total Tubes above Plugging Limit<0%Total Tubes Previously Plugged Total Tubes Mechanically Plugged this Outage Steam Generator/72B 303 15 33 38 130 Total Tubes Tested Total Imperfections<20%

Total Degraded Tubes>20-39%Total Tubes above Plugging LimiD00%Total Tubes Previously Plugged Total Tubes Mechanically Plugged this Outage Indication Locations:

Diagonal Bar Coldleg Q Bottom Diagonal Bar Coldleg Q Top Diagonal Bar Hotleg Q Bottom Diagonal Bar Hotleg Q Top Vertical Strap//1 Sub Total Other Artifacts Recorded Are: 300 19 12 38 3 130 S/G>>Art 01 18 50 26 6 S/G IIBII 38 15 07 12 6 118 Dents at Diagonal Bar Hotleg Dents at Diagonal Bar Coldleg Q Bottom Dent at Diagonal Bar Coldleg Q Top Permeability Variations