ML18110A612

LER 1976-009-00 for St. Lucie Unit 1, Defective Mechanical Pipe Restraints

ML18110A612
Person / Time
Site:	Saint Lucie
Issue date:	04/12/1976
From:	Schmidt A Florida Power & Light Co
To:	Moseley N NRC/IE, NRC/RGN-II
References
PRN-LI-76-77 LER 1976-009-00
Download: ML18110A612 (7)

Text

U,S.NUCLEAR REGUI ATORY COMMISSION DOCKET NUMBER NRC FORM 195 I2 76)50-335 FILE NUMBER INCIDENT REPORT NRC DISTRIBUTION FQR PART 50 DOC KfT MATf RIAL TO: (N.C.Moseley FRoM;or ia ower 8 Light Co.Miami, Flordia A.D.Schmidt-DATE OF DOCUMENT 4-12-76 DATE RECEIVED 4-22-76 OLETTER t,ORIG INAI 0 COPY QNOTORIZEO g UNC LASS IF I E D PROP INPUT FORM NUMBER OF COPIES RECEIVED 30 DESCRIPTION Ltr.trans the following.......

ENCLOSU RE Licensee Event Report (R.O b 76-9)on 3-31-76 Concerning dei'ective mechahical pipe restraints (30 Carbon Cys.Received).'DO NOT REMOVE A.CENO%LEDGED.

PLANT NAME: St.Lucie 8 1 0 NOTE: IF PERSO~iL EXPOSURE IS INVOLVED SEND DIRECTLY TO KREGER/J.COLLINS SAFETY BRANCH CHIEF.: W 3 CYS FOR ACTION LIC.ASST: W/CYS ACRS 16 CYS FOR ACTION/INFORMATION mann/SIENT TO LA ENVIRO SAB 4-2-E FILF NRC PDR&E 2 IN TE R NAL D RI BUTION IST SCHROEDER/IPPOLITO NOVAK CHECK R lfES S OWEN E TEDE CO MACCA BAER SHAO OLLMER BUNC KRE F.OL NS LPDR: Ft.Pierce FL TIC NSIC EXTERNAL DISTRIBUTION d a.CONTROL NUMBER 4014 NRC FORIVI IBS I2.76)

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April 12, 1976 PRN-LI-76-77

%e~tato~~i CU*~/DOC KITED ff/2 1876~P.O.8OX 013100, iIi1IAMI, FLORIDA'33101 F;~eb-;O t'saksCdha51 j FLORIOA POWER 8i LIGHT COi%1PAiNY Cb Mr.Norman C.Moseley, Director, egxon II Office of Inspection and Enforcement U.S.Nuclear Regulatory Commission 230 Peachtree Street, N.W.', Suite 818 Atlanta, Georgia.30303 P

Dear Mr.Moseley:

REPORTABLE OCCURRENCE 335-76-9 ST.LUCIE UNIT 1 DATE OF OCCURRENCE:

MARCH 31, 1976 DEFECTIVE MECHANICAL PIPE RESTRAINTS The attached Licensee Event,.Report is being submitted in accordance with Technical Specification 6.9 to provide prompt notification of the subject occurrence..

Very truly yours, D.Schmidt, Vice President Power Resources I MAS/jn Attachment cc: Jack R.Newman, Esquire Director, Office of Inspection and Enforcement (40)Director, Of fice of Management Information and'rogram Control (3)%(

A 1~&f+t lip~.44".~~i LIUl I AIVI L I V LI'O'I"" I ILI Vfl'I~'.X~CONTROL BLOCK: 1 UCENSEE a NAME m~~7 89 14 15 LCENSE NUMBER 0-0 0 0 0 0-0 0 25 I (P PAINT ALL REQUIRED INFORMATION)

%CENSE EVENT TYPE TYPE I 1 1 1 1~01 26 30 31 32 REPORT REPORT CATEGORY TYPE SOURCF~ac CONV~~I~Z..O 7 8 57 58 59 60 61'OCXET N 5'0 UMBER~EVENT OATE REPORT CATE 0 3 3 5 0 3 3 1 7 6 0 4 l 2 7 6 68 69 74 75 BO EVENT OESCRIPTIQN t002 Preo erational testing of piping restraints (snubbers) was being performed during 8 9~0 3 the heatuo for Post Core Hot Functional testing.At the 260 F heatup plateau, five 7 8 9 BO w found to be locked uo.The immediate action was to oromptly~o4 7 8 9 Qog of this t e.(335-76-9).

7 8 9 BO[ODg re lace the defective snubbers with operable snubbers.This was the first occurrence 7 89 SYSTEM CAUSE CQOE COOE COMPONENT COOE~ZZ~B H A N H R'7 8 9 10 11 12 17 CAUSE OESCRIPTIQN

'gQB The five defective snubbers were PAP4IE CCMPONENT COMPONENT'UPPUER MAhKlFACTURER

~A B 2 1 0 43'.44 47 Model MSVA-l snubbers.Two VCIVLTCN N 48 of the defective 80 7 8 9 80 Q<s snubbars were disassembled on site by a manufacturer's representative.

It was found;7 89~10 OTHER STATUS NA AMOUNT OF ACTIVITY NA PRQBABL CONSEQUENCES, 7 8 9 LOSS OR OAMAGE TO FACIUTY TYPE OESCRiPTIQN PUBLICITY'7, 89 FATTY STATUS'4 POWER co 7 8 9 10 12 13 FORM OF ACTIVITY COATENT RELEASEO OF RELEASE ia~~z'7 a e 10 11 PERSONNEL EXPOSURES NUMBER TYI E QESCRIPTIQN fit~]~oo o~z 7 8 9'1 12 13 PERSONNEL (N JURIES NUMBER CESCRIPTION

~4~ol o o 7 89 11 12 METHOO QF OISCOVERY 44"45 NA NA NA NA OISCOVERY OESCRIPTIQN preo erational test procedure 46 LOCATION QF RELEASE NA 80 80 80 80 80 80" 7 89 ADOITIONAL FACTORS.+18 Bee pa e Iwo for continuation of Cause Description.

.7 89 BO 7 89 M.A.Schoppman P ONE'05/552-3779 80 CF0 0 II~~CT Repor"able Occurrence 335-76-9 Licensee Event Report Page Two Cause Descri tion (continued) that moisture had caused oxidation of internal carbon steel parts which had then caused the snubbers to 1'ock.Followup action was to send the other;three snubbers to the manufacturer for laboratory testing and analysis.A'followup report will be prepared and submitted upon completion of the inves-tigation..The five defective snubbers were found in the following order: s/w Location Date 000377 000343 000525 000695 090632 RC-142 RC-142 RC-142'H-142 CH-142 3/31 (disassembled on site)3/31 4/1 4/1 (disassembled on site)4/2 Pa 4%iI 4 I