05000321/LER-1978-027-03, Hanger E11-RHR-H97 on RHR Svc Water Outlet from Heat Exchanger Found Broken. Caused by Sheared Support Rod & Disengaged Saddle Bolt. Switch Replaced

Hanger E11-RHR-H97 on RHR Svc Water Outlet from Heat Exchanger Found Broken. Caused by Sheared Support Rod & Disengaged Saddle Bolt. Switch Replaced

ML19256G119
Person / Time
Site:	Hatch
Issue date:	12/17/1979
From:	Coggin C GEORGIA POWER CO.
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II)
Shared Package
ML19256G114	List: 05000321/LER-1978-027, Forwards Updated LER 78-027/03X-1 05000321/LER-1978-027-03, Hanger E11-RHR-H97 on RHR Svc Water Outlet from Heat Exchanger Found Broken. Caused by Sheared Support Rod & Disengaged Saddle Bolt. Switch Replaced
References
LER-78-027-03X, LER-78-27-3X, PM-79-1013, NUDOCS 7912270477
Download: ML19256G119 (2)

LER-1978-027, Hanger E11-RHR-H97 on RHR Svc Water Outlet from Heat Exchanger Found Broken. Caused by Sheared Support Rod & Disengaged Saddle Bolt. Switch Replaced

Event date:
Report date:
3211978027R03 - NRC Website

text

-

U. S. NUCLE AR R

.. a RC FORM 3G6 LICENSEE EVENT REPORT Update LER T 12l Previous Report Date 5-26-78 CONTROL BLOCK: l l

l l

l l lh (PLEASE PRINT OR TYPE ALL REQUIRED INFORMATION) i 6

l l@

l G l Al E l I l H j 11@l 0 l 0 l 0 l 0 l 0 l 0 l 0 l 0 l0 l0 l 0 j@[4 l1 l1 l1 l 1 j@l 71 ij 2s 2s i.iceNuc TvPE 20 si cat 34 ucE m EN w een a 9 uces:ef cooE i4 is l 3 l 2 l 1 j@l 0 l 510 l 217 l 8 ]@[1 l 2 l 1 l 7 l 719 j@

Sj%,' l L j@[ 0 l 5 l 0 l 0 l 0 M

69 EVENT DATE 14 75 REPORT D Alt ts 0 0

1 60 61 DOCKET NUY3EH 8

EVENT DESCRIPTION AND PROBABLE CONSEQUENCES hhile increasing power on a

a 121 LAt approximate 1v 93*, thermal pcwer, w 1 plant personnel discovered a hanger on the RHR service water outlet from the j

O 3

Further investigation revealed the support rod to be j

i n l4 ] l heat exchanger to be broken.

iO ls) I sheared and saddle bolt to be out. Other similar hangers.were. inspecte 1

j o jc i I to be in satisfactory condition.

_l 10171 1 l

7 8 9 0l Rl Tjg @g hDEg S aC DE S

C E CO E SL C f CO*.'PONENT CODE P

l Cl f[@ [ El@ W@ l Sl U l0l9]

3 9

to 11 12 1J 18 IJ 20 REVISION OCCUR RE NCE HEFOHT SC OL E N TI A L

@ arg [217l8l g

l0 l2 l7

],. j l0 l3 )

[Xj l.__j l3 l CODE TYPE N

AFPCRT NO.

_ EVENT YE AH ggn pg 22 D

24 2ti 21 28 2']

31 41 32 TAK ACT O PLA T TH b HQUHS LB i 1E FC d

8.

SU PtlE M3 LFA T EH lAj@lXj@

QJ@

(7.j@

l 0l 0l 01 0l gg l2Yl g l3N lg lB l2 0 l9 jg 33 JJ 33 5

31 43 4

4 4

44 47 CAUSE DESCFiPTION A 40 CORRECT. VE ACilONS On l

o } l Upon discovery, hanger t:11-RHR-H97 was replaced with an identical replacement.

i The j

Bechtel Power Division submitted a re-analysis for this hanger.

lili}

June 29, 1978, f this i g,;.,j l re-analysis states that the present design is adequate but that misalignment o 11131 l hanger upon installation can easily cause the bending motion to shear t j

Their recommendations to switchj g,g.,i i as stated above.

PO i

8 9 DISCOVERY DESCRIP TJCN si s

NPCWER OT Nf H ST ATUS D SCO Y

NA l

l lgl Operator Obser' ation j

J @ l0l9l3J@

so i s u

e e

12 o

A!TiviTY C#rtsi AMOUNT OF ACilVITV @ lNdOCATION CF PEL E Att l

netEasEn Or enF ASE NA l

[Zj Q [{Jgl 1 G Ptnstus c xrosuAcs PtioN@

l TvPE @lOtsca:

NA Nu mn 1817 l l 0l 0l__0j@l l

" ' PtasONNc't iN;u' des N ua.99 E R DESCFCP TION NA I

ITT 11 OI 01 Ol@l 8 9 ti 12 LOSS OF OH D AV AGE TO F ACitlTY j [

f TYPE G E SC H.d TION lU l

'J 63 I

H 9 10 e

.Lz]E @DESCFuPTION NA 7912270

-/

_J llllll1t lt1li ISSU l

/

68 69

80. ;;

2 n 9NWM

{

/

M 3 10 A,tr F PitE PARE,i C. L. Coatiin, Supt, P1t. Enq, Serv, gnoyg.

Georgia Power Company Plant E. I. Hatch Baxley, Georgia 31513 Cause Description and Corrective Actionsto a type of hanger more tolerable to misalignment for hangers E11-i'."9-97 and 111 and replace the clamp on RHRH-98, were implercented under Design Change Request 1-78-155 and Tlaintenance Request 1-78-2571.

The work was completed 8-9-79.

1644 318