ML20125B954

Ler:On 770315,following Installation of Redundant Torus Water Level Transmitter,Discrepancy Noted Between Two Torus Level Indicators.Torus Water Volume Returned to Normal Oprerating Volume

ML20125B954
Person / Time
Site:	Monticello
Issue date:	03/15/1977
From:	Mayer L NORTHERN STATES POWER CO.
To:	James Keppler NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION III)
References
LER-LER-770315-01, LER-LER-770315-1, NUDOCS 9212100227
Download: ML20125B954 (3)

Text

NORTHERN 5 TATE 5 POWER COMPANY MIN N E A PO Ll e, MIN N E S OTA 9 9401 Mr J G Keppler, Director, Region III office of Irspection & Enforcement U S Nuclear Regulatory Connission 799 Roosevelt Road Glen Ellyn, IL 60137

Dear Mr Keppler:

MONTICELLO NUCLEAR CDiERATING PIANT Docket No. 50-263 License No. DPR-22 Torus Water Volume Less than Technical Specification Limit The Licensee Event Report for this occurrence is reproduced on *he back of this letter. Enclosed are 3 copies.

Yours very tr ly bL .

L 0 Mayer, PE Maanger of Nuclear Support Services LOM/MHV/deh cc: Director, IE, USNRC (40)

Director, MIPC, USNRC (3)

G Charnoff MPCA Attn: J W Ferman 9212100227 770315 PDR S ADOCK 05000263 PDR

-over-

?)at/0330

UCENSEE EVENT REPORT i

CONTROL OLOCK:[ l l l l l l [PLEASE 'P& NT ALL MEGUIRED .NPORMAT10N) '

1 6 i AMI UCENSE NUMBER E i PE l010 l-l Ol 010l0 l0 l-l 0 l 0l l4l1 l1 l 1l 1l -l Oll'l l

8 7 89 lMlNlMlNlPl1l 14 13 25 26 30 31 32 CATEGORT tv 00CNET NUMBER -

SENT CATE REPOAf CAff

@ECONT I I I W l0 61l 5 l 01-10121-6l 31 10 l 3101117l 71 1013 l 1l 517171 78 57 58. 59. 60 - 68 69 7^. 73 80 EVENT DESCRIPTION .

O l FOLLOWING INSTALLATION OF A REDUNIANT TORUS _ IEliL TRANSMIITER, .i DISCREPANCY WAS ~

j 7 89 b0 EE l NOTED BEWEEN 11E WO TORUS LEVEL INDICATORS. INVESTIGATION REVEALED WAT TlE I

-7 89 60

$ l ACTUAL TORUS WLitE WAS 66,775 cu. ft,1,225 cu ft BiiLON mE MINDUM TECH. SPEC. j 7 89 bil

-@ l TTMTT OF 6R.000 cu. ft. TORUS WATER VOLUME WAS-RETURNED TO THE NOR*RL OPERATING j 7 89 b0

@ 1 WUBE. ONE PREVIOUS OCCURRENCE. (M-RO 05) J

'7 -89 --

mE b'0 CooY COMPONENT CODE fu m u a votAroN 811 ID J Lal 7- 8 9 -10 11 12 i Il NI SlTl Rl Ul

-17 l Al 43 lGl0l8l0l 44, 47 W 4a CAUSE DESCRIPfl0N 8 L A GEMAC TYPE 555111ARAA3 ARA dP TRANSMITTER WAS FOUND TO HAVE A FAILED SENSING J 7 89 h0

-h 7 89

! RFI TOWS ('AUSING A ZERO SHIFT IN WE OlfrPlff. TRANSMITTER REPLACED. J 60 8I J sfANs s Powin OTHER STATUS O C VERY OiSCOVERY OESCRIPTON 3' {,fj l1l 0l 0l l NA l [CJ l COMPARISON TO NEW INDICATOR l

/8 9 10 12 13 44 45 40 g 80 f

ET"o - !? Mise AMouNr o, Acon toCArc 4 IN L3 LzJ l NA l l NA . ?  % $2 l 7 8 9 10 11 - 44 45 /4 "N 'g 9 s D 60 PERSONNEL - EXPOSURES [. M 1 NuuoER b ~

DE I 0101 of LLJ TYPE DESC AsPT ON l NA hy 278h. dl; l 7 89 11 12 13

,f r. '* 60 PERSONNEL INJURIES NUWetR DESCRIPTON

'.,,# /

4 GE 1 01 01 cl I NA ._ , l 7 89 11 12 W 80 0FFSITE CONSEQUENCES 3E l NA l~

7 89 60 LOS$ OR OAMAGE TO FACluTY TYPE DE SCAFTON

' l LaJ l NA go 7 8e 10 PUBUCiTY

.@ NA l go ,

h 7 an, l A00lil0NAL FACTORS

@8n.

7.

NA -l go M, b- .

80 j

! 7 89 - ,,

NAME: WilifAM L HILL pwong. 612/295-5151

( **

A._,_...... . . , . , . , . . . , . . . . ..... , , , _ . __ _ _ _ _

l . UCENSEE EVENT REPORT CONTROL DLOCK:( l l l l l l (PLEASE PRINT ALL REGUteED INFORMATM3N) 1 6 Aus "pg

• trtNSE NUuB(R gy 0'

7 89 lMlNlMINlPl1) 14 l0 15 l 0 l-l Ol 0l 0l0 l0 l-! 0l 0l l4 l1 l1 8 'l1l l 0l1 l 25 26 30 31 32 cattoo pE Nf Docuti NuuBER tvtNT DATE REPOA7 DATE ECON 7 l 7 6 57 l

58 l

59 LLJ 10 l 5101-101216l 3l 101310 l ll 7171 1013 l 1l Sl 7l 7l 60 81 68 69 74 75 80 EENT DESCRIPTON o

=

7 89 l ICLLOWING INSTAL!ATION OF A REDUNIRYT TORUS LEVEL TRANS\ FITTER, A DISCREPANCY WAS j 60 3 [ NrJTED BETh*EEN THE ThD TORUS LEVEL INDICATORS.INVESTIGATION REVEALED THAT THE l 7 89 60

$l ACT11AL 1DRUS VOLtBE WAS 66,775 cu. ft,1,225 cu ft BELOh' 'IHE MINIhUM TECH. SPEC.

7 8 l

@9l 1 Tm r OF 6R 000 cu. ft.

7 8 TORUS WATER VOUAE WAS RETURNED TO ME NOR*tAL OPERATING bJ j

@9l VnLtBE. ONE PREVIOUS OCCURRENCE.

7 89 (M-RO 05) b0 J

mt 60 0 CODE COMPONENT C006 JMi M VOLATON bid lI l D l [f]

7 89 10 11 12 l Il Nl SlT l Rl Ul [_AJ lG l0 l8 l0 l W 17 43 44 47 ca CAUSE DESCR!PTON

@l A rBtAC TYPE 555111ARAA3 ARA dP TRANSMITTER WAS FOUND TO HAVE A FAILED SENSING 7 89 ~j bJ 81 7 89 nr1mws musing A ZFR0 91FT IN WE OUTPUT. TRANSMITTER REPLACED. j O'O

[IE I J

'.= s ,e m a c1 ta s1A1u. 7Maal otscavia, otsca ,1o~

d 7 8 (1]

9 10 l1l 0l 0l l 12 13 NA l 44

[CJ l COMPARISON TO NEW INDICATOR l 45 46 g 80 RE LIISED 0 E ASE AMOUNTt" ACTMTV 8

7 8 L7J 9-LIJ 10 11 l NA l 44 l NA 9 LOCATON cm

' ASE x l 45 ,- g 4

'VW\ 60 PERSONNEL EXPOSURES Nuusta tvPt otsensrios 1

/f e, 71 7

13 I o f ol 01 Lgj i NA t- 4 /px en 7 89 11 12 13

• l PERSONNEL INJUR:ES g

'N

^

,t_,

60 r,

NUMBER DESCA# TON .

'I 8 1 01 01 ni i NA Q, 7 89 11 12 v

,[ _]

80 OFFSITE CONSEQUENCES 3l 7 89 NA 1

g LOSS OR DAMAGE TO FACIUTY YTFE DESCAFTON (5b] [1] l NA 7 89 10 "' l 00 PUBLCITY LT] I NA i

7 89 80 ADDITONAL FACTORS

@l 09 NA l

60  ;

b !'

7 89 l 60 NAME: WTI.T I AM mT, HTLL PHCNE: 612/295-5151

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