05000278/LER-1979-030-01, /01T-0:on 791002,rigid Hanger Failed Due to Contact Between Two of Four Bolts & Base Plate.Caused by Improper Installation.Two shell-type Bolts Were Replaced W/ wedge-type Bolts & Plate Washers Were Installed

From kanterella
(Redirected from ML19259D691)
Jump to navigation Jump to search
/01T-0:on 791002,rigid Hanger Failed Due to Contact Between Two of Four Bolts & Base Plate.Caused by Improper Installation.Two shell-type Bolts Were Replaced W/ wedge-type Bolts & Plate Washers Were Installed
ML19259D691
Person / Time
Site: Peach Bottom Constellation icon.png
Issue date: 10/17/1979
From: Cooney M
PECO ENERGY CO., (FORMERLY PHILADELPHIA ELECTRIC
To:
NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION I)
Shared Package
ML19259D684 List:
References
LER-79-030-01T, LER-79-30-1T, NUDOCS 7910260255
Download: ML19259D691 (1)


LER-1979-030, /01T-0:on 791002,rigid Hanger Failed Due to Contact Between Two of Four Bolts & Base Plate.Caused by Improper Installation.Two shell-type Bolts Were Replaced W/ wedge-type Bolts & Plate Washers Were Installed
Event date:
Report date:
2781979030R01 - NRC Website

text

..

Unit 3 LICLNSEL LVI.N I HLPUH1 ite po rt No. 3-79-30,/ 1T CONWOL ULOClO l l

l l

l

}

Q WLL ASE PmN T OH TYt'l ALL HLOUlHLo un OHMATIOm S l 3 l@l Ol 0l -10 Ol 0l 0l 0 - l O l O l@l 4 1lljll1l@l l

l@

10 1

P A lP B

U 9 LICENSEE CODE 14 lb LIC E N$L NUPJUt H

/'>

26 L lL t P.5 E T ) P L Ju

$/

L. A l 9 o.,.,

5T 1 2 % 1 Ll @ l0 is 1 01 -l 012 17 la l@l1 10 i0 l'> 17 19 l@l1 10 11 7 17 pj@

/

h w

G1 OGCK ET NU'/U E H GH to Ev(NT OAlf 14 OtFOR1 DAIL hO EVENT DESCHIPTION AND PRODABLE CONSLQUENCES h (o

>1 1 The inspection program beinr, performed in response to IE Bulletin 79-02 1

identified rinid hanger, 3-14-GB-S6 as failed due to contact bett c,two j

g 3

jo 4

[

of four bolt shells and the base plate. This hanger supports a portion J

of the Unit 3 "B" Loop Core Spray discharge line. The reduction of this j

[g 3

g jo g

hanger sa fety factor to 1.95 has rainimal safety significance because Unit 1

gj, l 3 reactor is in the cold chtttdown conditiot. for re fuelin.

l Io a

1 8 9 15 0 S Y GT L *A

CAUSE

CAULF L C'M P

%ALy[

CODE CODE SL t4 COO L i.OW% Nt '. I CO Dt sutif ODE SUBCODE sIcl@ U @ Ic

@ I s l ti l e 10 la IT 18 L^ @ W 8 J

p, o

1 8

9 lu 11 12 TJ 1,5 I cs du

' I Ot 10 PJ 11 A l OCCt'h P F Nt:t h[ FOfli H L \\ lblO'J

[ q ng EVENT YL AH hl' POH T P 0 COUL TYPt NO 4

@ "(t llp,r

[ 7l gl

[---J [0j3l01 l/l 10l 1 l lT l l-10 l y

, /1 7/

21

/4

/t; ff 7re

.s fu

'l l 1/

Af I H 'PJ l if f t.lel i*iLCl Le i t s l [,i g, J A 13,s ('g es/[ tJ 1 hrito 4 estit.* [ U P.'e f.i)/ pt )N t re l l AKEfd I. C i lota O'4 PL APdT Miil400 ht; UHS 22 S u [3 's :I LD F CHM WH 5UPPlit h f/ ANUT AC T Ullt et I.^_l@ LUG Iz 18 L2u@

10l0l0 i

lyig (N_j g l A ] @

lIl210l9jf JJ J4 12 J,

4 !)

41

.g j 43 44 4f CAUSE DESCHiPTION AND CCHRECTIVE ACTIONS h g [g] [

Improper installation is the probable cause of failure. The two shell l

[3, 3-type failed bolts uere replaced with vedge type bolts and plate washers I

ggg were installed where required. Corrective action has been complete.

J r $ 1] I I

Fi rq l I

n

,1 w

F /d t t 11 Y

'/l li4Cp Or EI A IIfS in PIJ /v f il QIll[ll S I /* I(M, l)l' v ;'/I I( (

J1 %bOV lII ( O L ',L Ii'P I e(JPJ f

G E] [Hjg [ 0l O j 0 lg[

NA l

lDjg[WorkinIEBulictin79-02 l

.4

't

,H 1/

13 14 di.

4(,

HO AC T IVI I (

i ON I1 N I r-"

fl[ L L /6f li (:F HI LI A';(

AtJGU N T OF AC TIVI ( V (

L OL A TIO'd OF H r. L E AL L i M lZj @ LZj@l NA NA

/

II 9

IU 11 44 4's lit) l l 1l'.t j'J ',6 t l.e Pt j'.l jil[, S L'O A*lii il I (l'l

[.JI bl iH F 3 I( JN Lu_d i i

10j@l%l@l NA

[

t il

')

Il 17 11 I

l'.O Pt H 'sOf.N L L q*41'Ji t t[ $

g Pid S'H i ll (J f '4ll!P llbN

)

j EO l..I lo j81 NA j

e.,

I, u

m, I ( M I)I ( H f t } A*J At.f T f) p /.t:ll t [y r*

I V6 0 t Al '.Lilll' l IU'4 EE,l l.,zJ8!

NA j

IHil '[N ji@ill Ll48PflO'J l

NA

'/[ /

I..q )

jjjll[jgl lljl

.f

,i 9 us

/ /

0/ /4-r. c L9 nu a

~

NAME OF PHEPAHER PHONE-