05000259/LER-1980-073-01, /01T-0:on 800928,during Steady State Operation, River Water Temp Peaked at 5.1 F Temp Difference.Situation Recurred Next Day.Caused by Incorrect River Temp Rise Predictions.Events Are Random Occurrences

/01T-0:on 800928,during Steady State Operation, River Water Temp Peaked at 5.1 F Temp Difference.Situation Recurred Next Day.Caused by Incorrect River Temp Rise Predictions.Events Are Random Occurrences

ML19340B246
Person / Time
Site:	Browns Ferry
Issue date:	10/09/1980
From:	TENNESSEE VALLEY AUTHORITY
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II)
Shared Package
ML19340B230	List: 05000259/LER-1980-073-01, /01T-0:on 800928,during Steady State Operation, River Water Temp Peaked at 5.1 F Temp Difference.Situation Recurred Next Day.Caused by Incorrect River Temp Rise Predictions.Events Are Random Occurrences
References
LER-80-073-01T, LER-80-73-1T, NUDOCS 8010210695
Download: ML19340B246 (2)

LER-1980-073, /01T-0:on 800928,during Steady State Operation, River Water Temp Peaked at 5.1 F Temp Difference.Situation Recurred Next Day.Caused by Incorrect River Temp Rise Predictions.Events Are Random Occurrences

Event date:
Report date:
2591980073R01 - NRC Website

text

l'

~%

NHc P UMet jt.e U. S. NUCLEAR REGULATORY COMMIS$104 f7 77)

LICENSEE EVENT REPORT CON 1kOL BLOCK. l l

l l

l lh (PLE ASE PRINT OR TYPE ALL REQUIRED INFORMATioN) 3 (s.l.i.J l A l I. l B l R l F l 1 l@l 0l 0l -l 0l 0l 0l 0l 0l -l0 l0 l@ 4 l 1 l 1 l 1l 1l@l l

l@

1 M

'J LiCINSEE CQOf 64 6

uCENSE NuuutM 2S

/s urENst ivrE Jo il s. A T w CON'T loIII

"',[E II. @l0 l 5 l0 l0 l0 l2 l5 l9 @l0 l9 l2 l8 l8 l0 Q8110l0l9l8l0jg d

60 el GOchETNuvutM (4

63 EVENT C ATk 34 75 ROORT 0 ATE M

EVENT DFSCRIPTION AND PROBABLE CONSEQUENCES h o 2 1During steady state operation, the river water temperature rise peaked at 5.1 F d/t.

C50'TD I This isas a 0.1 F d/t violation of technical specifica'lon E.T.S.2.1.

The next day, g

g iit was noted that river temperature was rapidly increasing. Unit 3 was placed on l

1 a t D t cooling tower mode; however, d/t again went 0.1 F over limit. Previous occurrences:

lo is l [BFR0 259/78011, 78012 and 80054. There was no hazard to the public.

10!31 l [0lal l l

7 a>

"C Sv5 TEM

CAUSE

CAUSE COMP VatvE CODE CODE SL8CCCE COMPCNENT CODE SUSCODE SUSCODE rm1 I z i z ih Laj@ LAJe l z i zi z i z i z i le tz j@ L J@

7 8

9 10 11 12 13

• e 19 20 SEOutNTlat OCCURRENCE REPORT Rt V 3SeON EVENTVEAR REPORf NO CODE TvPE N0 e."u s. m i I 8l 0l l-l I 01 71 31 y

1011l lT l [j

[0j yj,;;';

J8 22 23 24 26 27

'u TJ Ju

n 32 TI EN A fl0N ON FL NT U TM MOums 22 S a IT 80u $e S

P' E

vN FACTLRER lXl(@lZjg y g

{30@

l 0l 0l 0l Ul g g l3lg lzlg lgjgl9l9l(

IJ 3%

Ji 40 el og 43 44 er JOHIPTION AND COAAECTIVE ACTIONS h CM li)oj ,emputer temperature rise predictions were incorrect. On first occurrence, the [T fi-l l river flow was increased. Upon second occurrence, unit 3 was placed on cooling

[ tower cooling. Occurrences appear to be at random requiring no further corrective q l action.

i A l

i I

4 9

no

$T

% POWER oTMER$TATUS in Q HY OtSCOVERY OEScateTioN y W@ l0 l 9 l 7 l@l NA l { @l Operator observation l

ACit yt T V to TENT I8 I 6 I (,,,,zj @ [ z,,J@l AuouNTor ACrivity h l toCATioN oP RELE ASE h aELEasEn c, aELEast NA l

NA l

' or,,snNNd E.PostAis oE scR.efioN h unc o.

rveE

["iT7'l I 0101 Ol@l.zj@l NA l

'?.N,u',?,E s

,o. oN~

oEsCRienoNh -

Nime I ' I a l l 0l 0 l 0 l@l NA l

7 9 9 11 12 80 t 0% r.8 GH OAMAGE To FAcattTv Q h

• f.

bt!CRIPTION v

8 l. zj @ l NA

^#.

4 9 _

l fu 80 I%L E r t. SG 81'P f 'ON L: 13] [.,JJ61 Media information line.

I I I II I Ii i 1 I I I lI r

e

.4 se So ;

i R010 21 n69 3 r. Ave: o> PnEoAnEn

,,,,0N E