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

NRC FORM 195 U,S. NUCLEAR REGUI ATORY COMMISSION DOCKET NUMBER I2 76) 50-335 FILE NUMBER NRC DISTRIBUTION FQR PART 50 DOC KfT MATfRIAL INCIDENT REPORT TO: FRoM; or ia ower 8 Light Co. DATE OF DOCUMENT

( Miami, Flordia 4-12-76 N.C. Moseley A.D. Schmidt- DATE RECEIVED 4-22-76 OLETTER QNOTORIZEO PROP INPUT FORM NUMBER OF COPIES RECEIVED t,ORIG INAI g UNC LASS IF I E D 0 COPY 30 DESCRIPTION ENCLOSU RE Ltr. trans the following....... 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 NOTE: IF PERSO~iL EXPOSURE IS INVOLVED 0

SEND DIRECTLY TO KREGER/J. COLLINS SAFETY FOR ACTION/INFORMATION ENVIRO SAB 4 BRANCH CHIEF.: mann W 3 CYS FOR ACTION LIC. ASST:

W/ CYS ACRS 16 CYS /SIENT TO LA IN TE R NAL D IST RI BUTION E FILF NRC PDR

& E 2 SCHROEDER/IPPOLITO NOVAK CHECK R lfES S OWEN E TEDE CO MACCA BAER SHAO OLLMER BUNC KRE F. OL NS EXTERNAL DISTRIBUTION CONTROL NUMBER LPDR: Ft. Pierce FL d a.

TIC NSIC 4014 NRC FORIVI IBS I2.76)

~ i).

j,eafza":~.3.N E

'"3J b" 4 f'

~ I

~ ~

C 'p "f J ply ~[,] g w qual'"f

'>',fl"*"~<, 7>~'f,) V,X,' )(,g+ r)gq il>ll p ~~"l k I c ll ll,,~~~ ~ )<~A pjf Jh

.')f . "I ~ .s I I hl'll,j V,'

1

-.;-',i,.; >J ] r)-,, ~

g .,j. ~;

P.O. 8OX 013100, iIi1IAMI, FLORIDA'33101

%e~tato~~

O F;~eb-;

i t'saksCdha51 j CU

~

FLORIOA POWER 8i LIGHT COi%1PAiNY

/ DOC KITED April 12, 1976 ff /

PRN-LI-76-77 2 1876 ~

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)

% (

1 A

~&f+

t lip

~. 44".~~i

~ '. X~ CONTROL BLOCK:

1 LIUl I AIVI L I V LI 'O'I "" I ILI Vfl'I (P

I PAINT ALL REQUIRED INFORMATION)

UCENSEE a %CENSE EVENT NAME LCENSE NUMBER TYPE TYPE m89 ~ ~ ' 0 0 0 0 0 0 0 0 I 1 1 1 1 ~01

~

'7 14 15 25 26 30 31 32 REPORT REPORT

~ac CONV CATEGORY 57 58 TYPE

~I 59 SOURCF

~Z.. O

'OCXET 5 '0 N UMBER 0 3 3 5 68 69 0

~ EVENT 3 3 OATE 1 7 6 74 0

75 4 l REPORT CATE 2 7 6 7 8 60 61 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

~o4 w found to be locked uo. The immediate action was to oromptly 7 8 9 BO

[ODg re lace the defective snubbers with operable snubbers. This was the first occurrence 7 8 9 Qog of this t e. (335-76-9).

7 89 PAP4IE 80 SYSTEM CAUSE CCMPONENT COMPONENT'UPPUER CQOE COOE COMPONENT COOE MAhKlFACTURER VCIVLTCN

'7

~ZZ ~B H A N H R ~A

'.44 B 2 1 0 N 8 9 10 11 12 17 43 47 48 CAUSE OESCRIPTIQN

'gQB The five defective snubbers were Model MSVA-l snubbers. Two of the defective 7 8 9 80 Q<s snubbars were disassembled on site by a manufacturer's representative. It was found

7 89 80

~10

'7, 89 FATTY METHOO QF 80 STATUS '4 POWER OTHER STATUS OISCOVERY OISCOVERY OESCRIPTIQN co8 NA preo erational test procedure 7 9 10 12 13 46 80 FORM OF ACTIVITY COATENT

'7 ia a e

~

RELEASEO OF RELEASE

~z 10 11 AMOUNT OF ACTIVITY NA 44 "45 LOCATION QF RELEASE NA 80

'1 PERSONNEL EXPOSURES NUMBER TYI E QESCRIPTIQN fit~] ~oo o ~z NA 7 8 9 12 13 80 PERSONNEL (NJURIES NUMBER CESCRIPTION

~4 ~ol o o 7 89 11 12 PRQBABL CONSEQUENCES, NA 7 8 9 LOSS OR OAMAGE TO FACIUTY TYPE OESCRiPTIQN NA 80" PUBLICITY NA 7 89 ADOITIONAL FACTORS

.+18 Bee pa e Iwo for continuation of Cause Description.

.7 89 BO 7 89 80 M. A. Schoppman P ONE'05/552-3779 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 RC-142 3/31 (disassembled on site) 000343 RC-142 3/31 000525 RC-142 4/1 000695 'H-142 4/1 (disassembled on site) 090632 CH-142 4/2

Pa 4%iI 4

I