ML19257D708

LER 79-104/03L-0:on 791230,immediately Following Plant Trip, Steam Driven Emergency Feedwater Pump Started & Then Tripped on Turbine Overspeed.Caused by Isolated Steam Trap Resulting in Condensate Line.Administrative Controls Instituted

ML19257D708
Person / Time
Site:	Arkansas Nuclear
Issue date:	01/29/1980
From:	Pendergraft R ARKANSAS POWER & LIGHT CO.
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION IV)
Shared Package
ML19257D703	List: ML19257D702 ML19257D707 ML19257D708 ML19257D709
References
LER-79-104-03L, LER-79-104-3L, NUDOCS 8002050500
Download: ML19257D708 (1)

Text

.

.

.

NRC FORM 366 U. S. NUCLE AR REGULATORY COMMi$$lON (7 77)

LICENSEE EVENT REPORT EXHIBIT A CONTROL BLOCK- l IPLE ASE PRINT OR TYPE ALL REQUIRED INFORMATION)

.

l l l l l lh .

o i l AlR l A Nl 0 ] 2lgl 0 l0 l -l0 l0 l 0l 0l 0 l- l 0 ]0 lg l1 1 l1 l 1 lgl l lg 7 s 3 (sCEN5f t CODE la M LICE NSE NvueE H 25 26 LK t N>E Ivri JO b 7 C A T Ss CON'T o i C"CI Q10 l 5 p l0 l 0 l3 l 6 l 8 j@l 68 1 l 2 13 l 0l 7 l 9]@l ra 011 l 219 l 8 l 0j@ 80

? O 60 64 DOCEET Nuv8E m 6"> EVENT DATE 75 HfPOH1 DATE EVENT DESCRIPTION AND PROB ADLE CONSEQUENCES h roi2i l Immediately following a plant trip the stean driven Emergency Feed Water; 10121 i Pump (2P7A) started and then tripped on turbine overspeed. The electrict o ,  ; Emergency Feed Water Pump (2P7B) was operable and had sufficient flow l c s i for the transient response. The turbine trip on 2P7A was reset and the t ia j; pump was successfully started 3 times. Similar to LER's 50-368/79-055,I a , i 79-072, 6 79-081. Reportable per T.S.6.9.1.9b  ;

o a l I 7 8 9 83 dP C E C E SVB E (0M*0NE NT LOUE  % t $btout in191

, ,

lWlBl@ @j@ W @ lTlUlRlBlIlNl@ G.j@ Q @

, ,, ,, ,, ,, ,A ,e sE OLE N T' A t OCLL A k r P.Cf R E vi1'ON

_EbfNYvfaa REPOaT NO CODE H E,vet Po.i t Ng L

@ ,a'Es A ,* hO

'

_2, i719 1 n

L_J 23 l 1 1 014 i

. n M

2r lo 131

s s L,t.J L, 3

-J Lo_J u

TA.EN ACT CN F A T T* wouRS S 8 aT C 804 N svPPL ER MAN ,AC A,A L

3J 9@l.E_J@ lEl@

34 35 Ll.J@

36 1 0101 01 01 37 40 0@ W@ IA@ ITl14171@

41 42 43 ea e, CAust OEscR.cTiON ANo ccRREcovt ACTIONS @

i, jo;[ A steam trap on the steam supply line was isolated due to a blow-thru.  ;

i,,,ji problem. The isolated steam trap resulted in condensate in the supply ,

,,,,ji line which caused the over-speed trip. Additional administrative controhs

, 3  ; on trap isolation have been instituted to prevent reoccurrence. i i 4 I l C

'sT A'Us' ov-c.4 ST ATuS H v' Leo *Ea D SC DisCU% E M Y DE pp rioN

@

li is l Q.j@ 10 [ S l 0l@ Testing

' " "

l [ Ajgl NA_ l Alt, vi i . '3 45 ac so Co' TINT cu Asto o m .As. muNT c, ACT,,,1 m ,,0N o, ,,n , Au @

l1' Ic l LZ_J

' '

@ [.Z_J@l NA @ "l l NA

,E s

=

,~~.oE..,',1...cs ,,,, 1 , ea s,..,,o, @

l i l > l l 0 ] 0 l Ol@y@l NA l

' ' ' '

,e so~N e'L ,N;u'a'1 s sa Nuveta aisCa .TicN@

[TT1j01010j@l NA l

, . . ,, ,,

"

w = :,ur --@  ; 876 104 i o [1j@l NA . j 7 A 9 10

'US L ICI T Y I^

t$$uf D Disc P'PTION 45 NRC USE ONLY

. } l!!lllllll ll l

"

AME OF PREPARER EeX EendeTUTaft PON E .

5di/968-2519 80 0 2 05 0 5UO