ML19254D532

LER 79-032/01T-0:on 791005,seismic Support Associated W/ Emergency Svc Water Return Line Failed.Two of Four Bolts on Support Plate Failed to Meet Torque Requirements.Caused by Improper installation.Shell-type Bolts Replaced

ML19254D532
Person / Time
Site:	Peach Bottom
Issue date:	10/22/1979
From:	Cooney M PECO ENERGY CO., (FORMERLY PHILADELPHIA ELECTRIC
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION I)
Shared Package
ML19254D531	List: ML19254D530 ML19254D532
References
LER-79-032-01T-02, LER-79-32-1T-2, NUDOCS 7910260266
Download: ML19254D532 (1)

Text

,C P UHl.1 an.o is . f dla.L L sm e t 14 4 4.0 L A l t, s. . os

• 11l.

Unic 3 LICENSEE EVENT REPORT Report No. 3-79-32/lT CONTHOL OLOCC l l l l l l l tPLEASE PRINT ')R TYPE ALL REQUIRED INFORMATION) i e i 1 lE ' A l P lB lS 3 (@l 0l 0l -IO lOlO!010l-lO!Olhl4I1l1l1 1lhI I a 9 LICENSEE CODE 14 15 LICENSE NUveE - ."3 26 LICENSE TYPE JO il CAI 5 t*

ON'T

' i

[n'[E I60L }@l015 1 0} -l 012 17 8 l@] l l 0 l 01. 5 7 l 9 l@l 1 10 l 2 l ' 17 19 j@

U 61 CCCs(ET NUMBEn bd v> EVEN1 O ATE 14  % R E POR T .} A T E '40 EVENT DESCRIPTION AND PROOABLE CONSEQUENCES h i 2 The inspection program being performed in response, to IE Bulletin 79-02 1 a J l has identified a failure in a seismic support associated with Emergency I o la I Service Water (ESW) return line. Two of four bolts on the support plate I a s i failed to achieve torque requirements, causing the safety factor to be j o 6 l below two. The safety sienificance is small because Unit 3 rnactor is in I 3 , [ the cold shutdown condition for refueling and failure of piping in this  ;

o u u9 L 1 cation would not interfere with ESW delivery. O j

SY0T LY C AU ,E C AU'4 COMP =ALVE CODE CODE SuuCOCe, COMPOtet fJT CODE SUuCGDE hutiCOD E 1 9 l Sl Fl @ W h I Cl h

$3 to 11 12 t3 S I U l P l O I R l T l h } A l h (_z.j h

q 19 N M Ot JE Nil AL GCOU'154iNO PEPCRT H E V 'S'O N g( n,no EVEf4T VE AR RLPCRT NO COUE TYPE NO.

@ atamT 17 l 9 I l-1 10 3 12 I l/l 0 il I lTl 1-1 1 Ol

_ 21 27 23 /4 46 '

1 2H 21 30 ll JJ A r. T I O N ru T U t<( FFFECT S u t l100 /.N A ATT ACHMENT NPAU 4 PRWECQYP LCMPON(41 TAKEN ACTION ON Pt. AN T METHOO SUdvlTTED SCHY huts SUPPLI E R MANUFACTunEH HOLHS @

l_AJ@l_aj@

JJ 34 Lz_.J@ Lz_JO I OI OI OI OI LI.J@ L1JO L2LJ@ l_11 21 0 I 9af i@

J> .u J' / 40 41 42 43 34 cAust asscHIPTICN AND CORRECTIVE ACTIONS

, gn [ Improper installation is the probable cause of failure. All four shell l

,i1i i type bolts were replaced with wedge type bolts. Plate washers were i

, , g installed over all four bolts to comply with the bolt hole gap g

,7 l criterion. Corrective action has been completed and safety factor is l

-~; q g greater than five.

l 1 'l 60 p A(.le i1 Y */h Tl4OU OE STATV. ' e>G /.t h OTHER S T A 7U0 UniCOvl H Y UI,COV E H Y OESCmP TION -4 T9 Lx]O 101010 l@l NA " "

I L2J@lWork in IE sulletin 79-02 i A2n v, , < A N1 *> a" HE M,% E D f F e4 O G LOC A nON OF HE LE ASE @

Tl Iz l@ l z!@l o ., o ,,

AYOUNT OFo ACTivlTY NA l

.s NA @l l so I i s t'.t aN'si t i K l'O'.t allE '  %

NyMut u 3YPt 'JL Rie t P i t ON i l i I 0101 Oj@l z l@l NA l H ') i1 12 IJ '

ii 90 l't HiONN E L IN;UHtE5

• JMufH

. OLSClHP TION '

Tl] l 0l 0 l 0 l@l 11 1/

NA d l 1 't 30 I D' ', Or I)H IJ A*/ A GE T O F a Cil 1 T Y .

I vri i s t '.,C h t / D O N 8, i Z l@! ., ,,,

NA 1,c- 7 ') 7, ?40 l

"W L I' I # ^

NRC USL UNLY j .* l o] I N lhl

.w E n o c.C m , Tion U.c /, . .- 7010260Z MliiiilIi!III

• NA / ,0 , G,e i  !;

it 'J !H CU u 'J

/ / ~ / 00 &

m.+r m wa n ne n . _

M/ J. Cooney mw (215) 841-5020  ?