05000260/LER-1981-049-03, /03L-0:on 810927,containment Atmosphere Dihydrogen Analyzer Removed from Svc for Maint for Approx 3.5-h.Caused by Tripping of Sample Return Pump Due to Setpoint Drift on Vacuum Switch.Switches Calibr

/03L-0:on 810927,containment Atmosphere Dihydrogen Analyzer Removed from Svc for Maint for Approx 3.5-h.Caused by Tripping of Sample Return Pump Due to Setpoint Drift on Vacuum Switch.Switches Calibr

ML20011A852
Person / Time
Site:	Browns Ferry
Issue date:	10/26/1981
From:	Holder G TENNESSEE VALLEY AUTHORITY
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II)
Shared Package
ML20011A850	List: 05000260/LER-1981-049, Forwards LER 81-049/03L-0 05000260/LER-1981-049-03, /03L-0:on 810927,containment Atmosphere Dihydrogen Analyzer Removed from Svc for Maint for Approx 3.5-h.Caused by Tripping of Sample Return Pump Due to Setpoint Drift on Vacuum Switch.Switches Calibr
References
LER-81-049-03L-03, LER-81-49-3L-3, NUDOCS 8111030286
Download: ML20011A852 (2)

LER-1981-049, /03L-0:on 810927,containment Atmosphere Dihydrogen Analyzer Removed from Svc for Maint for Approx 3.5-h.Caused by Tripping of Sample Return Pump Due to Setpoint Drift on Vacuum Switch.Switches Calibr

Event date:
Report date:
2601981049R03 - NRC Website

text

NBC FOR,A 366 U. S. NUCLEAR REGULATORY COMMIS$10N (7 77)

LICENSEE EVENT REPORT CONTROL BLOCK: l l

l l

l l lh (PLEASE PRINT OR TYPE ALL REQUIRED INFORMATIONI n

6 l^lLlBlRlFl2plS0l0l-l0l0l0l0l0l-l0l0l@l4l1l1l1l1l@l l

l@

o i 9

LICENSEE C00g, 14 i

LICENSE NUMBER 25 26 LICENSE TYPE JO Si GAT $8 7

8 CON'T l.9.l i l 5$nN l L Jgl 0l 5 l 0 l 0 l 0 l 2 l 6 l 0 @[ 0 l 9 l 2 l 7 l 8 l 1 l@l1 l 0 l 2 l 6 l 8 l1 l@

J 8

60 61 DOCKET NUMBER 68 69 EVENT DATE 14 l's REPOhT DATE 80 EVENT OESCRIPTION AND PROBABLE CONSEQUENCES h l o 12 ] l During normal operation, containment atmosphere IL, analyzer was removed from service l

o ;3; l for 3 hours3.472222e-5 days <br />8.333333e-4 hours <br />4.960317e-6 weeks <br />1.1415e-6 months <br /> and 37 minutes for maintenance, due to sample return pump tripping.

I j o l4 l l 2 - If m-76-104 was declared inoperal.

during this time. (T. S. 3. 7. II. 2) There was 1

2 [o13J l u.s danger to the health or safety of the public.

Redundant cystem was available l

[ojcj jand operable. There were no previous similar events l

l0 l7l l 1

,10181 L_

l J

8 9 80 S Y S T E '.1 CAULE C AU'iE COVP.

VALVE COC'E COCE SUSCODE COVPON5 N T CODE SUBCODE SUBCODE lol9l l S l A l@ W@ [B j@ l Il Nl Sl Tl Rl Ul@ l S l@ W @

7 8

9 10 11 12 _

13 18 1) 20 SEQUE N TI A L OCCURRENCE HEPORT REVISION LE EVENT YEAR REPORT NO.

CODE TYPE NO.

@,ar=R PO1 81 11 L-j l 0l 4l 9l [d

[0l3l y

[.--J W

o

_ 21 22 23 24

6 27

.i 2')

Ju 38 32 AKE4 ACTIOT O PLANT T O HOURS SUB D

F R1 US.

SUPPLIE I MAN TAC flE R lE lgyg yg y@

l0l { 0l0l lJ@

W@

l Sl 3l 8l 2l@

J3 J4

'L J6 3/

40 41 42 43 44 47 J

CAUSE OESCRIPTION AND CORRECTIVE ACTIONS 77

[ i j o l l Setpoint drif t on the Static-0-Ring model 54NN-KA-YI-CIA vacuum switch caused the 1

[ i li l l sample return p.np to trip. Switches pS-76-103B and pS-76-104B were calibrated.

I ii;7i j adjusted to wichin prescribed setpoint limits, and returned to service. This is 1

[,lil l considered a randorr. failure and no further recurrence control is required.

1

~

IiI4i l I

,1 8 3 80 STA

'6 POWER OTHER STATUS is / RY prSCCVEHY DESCRIPTION QJ [E_j@ l Ol 9l 9lhl_

NA l

l B l@l Observed by maintenance personnel.

l

>2 n

44 4s 4a so d,CT,virv

olTEsr mount Or aCvVtTY O LOC AflON OF PE'.E ASE @

notEAuo or nt'E ara L' lil Lz ] @ l_zJSI NA I

I NA I

nnso.d$ nood5Es ot sanc Tion @

swsu Tvn l i l 11 l o l 0 l 0 l@l 2 l@l NA l

" 9 noso. sd',..'?.n ao or scnir.osh no i en [ij,ll0l0!Oj@l NA l

s,

i, u

Pa L OSS O S OH D AV Ai>E TC ' Ar 4 L1 ' O TYPE LE;;n+ TIO 4 l ' l l l_?_jh!

NA l

• 9

'u 8111030286 811026 so O

PDR ADOCK 05000260 NRc USE ONLY

,,st. r. n oEsCmPT,oo U S

PDR I 2 I o l [N.Ljhl a 3 o

l lllIIIll1ll!l2 NA

.. s e ao ;.

Gene HoMn

@O MMM E

NAYF OF PRCPAREft p,, g., g

' era.en ce Valley Au t t.,; it y v,,,g u. b r MF 15.2

".r;wn', Ferry :;uc'c.ir Pl.uit f./G 1/51

!. !!: SI:.'i'!.i:' LENT A1. IN ! t >101 i l'li ::s

;10

,0- 2t9 81049 T" h"it ai Specil R at -

'n. Red 3. 7.11. _2,.

H e n": '.ed U n& r !. ch n. a! Spe, if a..!i"n 6.7.2.b(2) m:. t e

<ia.. nc 10/27/81

!.,i c of Or currence 9/27/81 Ume c f Occurr"ni i 1200,_ Unit 2

. Antification and in.cript:an f ( L currence 11., analyzer was removed f rom service for 3 hours3.472222e-5 days <br />8.333333e-4 hours <br />4.960317e-6 weeks <br />1.1415e-6 months <br /> and 37 minutes for maintenance m-76-104 was declared inoperable during due to sample return pump tripping.

2-II.3~

this time.

t' nditions i rior

• o ()ccu: rence Unit 1 in refueling outage.

Unit 2 at 99%.

Unie 3 at 97%.

.i c t a.:-

,pecifi d in t he Technica! Specification Surveiiiance Heiluiremenb met h. inoperalde equipment.

Ded e t. ib e. _ _

v None

' Pim ent C a u :> e )f ( Ee.. renct-Setpoint drift on the vacuum switch caused the sample return pump to trip.

.b, p.s of, Occu rrent.

There was no danger to the health or safety of the public, no release of activ'ty, no damage to the plant or equipment, and no resulting significant chain of evei.ts, f'

n ( t ice /.M ion :

Switches PS-76-103F, and PS-76-104B were calibrated, adjusted to within prescribed setpoint limits, and returned to service. This is considered a randon failure and no further recurrence control is required.

i!n:1 !):sta None ib f etytion :

Pety/.!-

i.tfe r h.

f i c <. p.: sibility - Document C.)nt rol Supervisor

?

!"'//,/ (

' U * 'J 1S ii. n ;

ww