ML20038C897

LER 81-022/01T-0:on 811113,six Variable Spring Hangers on Emergency Feedwater Discharge Found Not Carrying Specified Design Loads.Caused by High Temp Conditions During Loading. Hangers to Be Replaced & Insulated from High Temp Environ

ML20038C897
Person / Time
Site:	Oconee
Issue date:	12/04/1981
From:	Kutzer J DUKE POWER CO.
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II)
Shared Package
ML20038C890	List: ML20038C889 ML20038C897
References
LER-81-022-01T, LER-81-22-1T, NUDOCS 8112140239
Download: ML20038C897 (1)

Text

e .

O wmC PCAas .se U. 3. NUCLEAa AEGULA70RY *.*,aansessacas.

(7 773 LICENSEE EVENT REPCRT Exsta:T A 00Nract. atoCx: l I  ! !  ! I I :et1 Ass *mMT ca Tvre ALL macuinto i%scawAnemi i e@

la 411 l rl.a @

3 8 9 l s wC4.aeste I clN COCE IE l E l l Q O 101 -l Ol010 to S f O! 01- l 0 I :SO!Q{4 wCvest anwese&A 3_ lwC1.ws4 11111l fvet 1l@

.e 43

.a 0C88"*

12eii M i @ l 01 510 101 012 16 I9 eQ il il i 11 31 811 g l 1l2 10; 4; 811 } g se

' 8 SB 41 Occx &7 %t.ans4A (VtmT 3 ATE ;4 75 etPCAT ATE 80 EVENT OE303lmCN ANQ peggan,3 copaggqugNcg3 @

l3,2, fon November 13, 1981 it was deternuned that six installed variable spring ,

, ,, , hangers were not carrying specified design loads. These spring hangers are

.3 .. located on the emergency feedwater discharge, upper ring headers surrounding ,

,,,,, ,each steam generator, between the steam generator and the steam generator in-

,, ,, ,!sulation. Piping analysis has indicated that the piping stresses are adequatej

, ,,,y thus, it is considered that this incident did not affect the health and safety

, ,,4 iof the public.  ;

,,n u-. uu. =4.. . . . ,

4 susC:ce  ::n acuswr:: s stec:ce staC:::

la+si I pI 5l @ @::ca@ l Bl @ lSIUl PIO iRIT . !@ [,Aj@ IJ @ ,,

. . .. ,, ,, ,, m

,,e . . . n.., ,c . .

.es tar -t - vear c. =e n ...e..,, ,c.

@ ,=a .,.og,18 11!

. =

[-

=

]  ! OJ212 l

. a y 101 1l s s l3 l a

{g g

1  :. a m: w  ::n yid st

@ l0 !O!0@1 s.wr .;:= c.=,: 2::w::,,

l[2@d@

. a IZ@ a

_s f

sa Ol 11@ lNl@ l L !@ II i 21017 '@

2 . .,

_n.ss sscaimcN Aac ::mascmvs Ac :ca s s

,,,,,lThe apparent cause of this occ rence is setting of the spring coils under

i,ii iload due to high temperature conditions. The spring hangers will be replaced ,

, , , j on Oconee 1 and 2, and the insulation modified to exclude the hangers from the i..-1i high temperature environment. A survey to identify and correct this problem I t,! len other snrine hancers will be conducted. Oconee 3 is not affected. ,

3* Tb3 %P?*te CTlatA FTATL3 ssCOv m ogscOvgav CtICaiaCm 6 : i s ! (_Uj@ l0 1010 !@l NA l [C.,'@lTest durine svstem modification l 8 J.,,,y J r,,,, 53 's *

• so

.eu 4es :, asu4sa euu? c, .c nvin @ " e.oc.2ne e, seu.ase @

l ' i *'i *l ,7.,j @ lJgl NA l I NA I

! **=seadts e au

lt t7ll l l l

' ' ' .. .e.c _., u '= -

wtsam e t e O t S CNt P"C" NA li j,; j 01 010lgl

• 1 8 9 11 '2 ,g

• 353 C0 Cn 3.a.AGL TO G ACUTY

.?wt O E 5

• A* *7C ae NA li !'.l G, @ l l

-auer, tsyg3 OtSC2imCN AC t l5E ON(Y I:i21 r s e d hl is

! (IIii!ItII t es ., ,,

l

• Anas Os ==trassa J. F. Kutzer p cNs:

(704) 373-7139 O 00 9 PDR.