ML19308D219

LER 78-033/03L-0:on 780612 & 28,175 Ft Wind Speed Indication Lost.On 780621 & 28,33 Ft Wind Speed Indication Lost.Caused by Contamination of Indicators W/Coal Dust.Sensors Renewed & Returned to Svc within 24-h.Engineering Evaluation Begun

ML19308D219
Person / Time
Site:	Crystal River
Issue date:	07/07/1978
From:	Cooper J FLORIDA POWER CORP.
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II)
Shared Package
ML19308D139	List: ML19308D138 ML19308D219
References
LER-78-033-03L, LER-78-33-3L, NUDOCS 8002270680
Download: ML19308D219 (2)

Text

i

~.

U. S. NUCLEA~l l'sCUtATCC.Y CoMMasstog w' KAC FOmad 364 17 771 f.!CENSEE EVENT REPORT EXHIBIT A coNTmot stoc4: I I ist:4ss paiur onTves As.t ascuanso =ponwariom I I I l l@

] o i i l l F I Li C Rl P! 3 Igl 0 10 l t 01 010 l Og 0 1 ;0 ; O g 43 26 4

l 1;I[1 j 1[gj ,;_ [g wG4416 tvrt .J bJ wa s %d 7 s e uc3%A44 C006 6 19 us&?.14 **wwS44 -

s con'T g gf hl 0! SiOQoC447%.?3ga I -10 3:0 i 21@l0 1611121718 @lo!7 101717 agecar garg 18 sa l@

, to 69 twta r art J. JS a 6. 6B avenT cascairviou ano eacsaats ecssscussess @

14 ., a lol2l 1At 0200. 12 June 1978 and eenin te 0900- 79 waa to79 - 5. . 1 ? ct <- I o 2 Ispeed indication was lost. At 0900. 21 June 1978 and ae>d, e 0800. 28 inne!

i o i . ,11978, the 33 ft. vind sneed indication was lost. This is contra-r to I i o i s i ITechnical Soecification 3. 3. 3.4. Wind soeed sensors vere -aaevad nad i A treturned to service in each case within 24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br />. No hm-n-d ei heni th f Ia,,ilandsafetyofthepublicasnogaseousreleaseswereincreeress. I I

s a id i !

' cov*

s sTsu caust c. .st vau t caos c=ca sus:::: cose_a.ast::: suse::: svacces loial I I l El@' W@ l E l@ IT I N i S IT I R I Ul@ W@ [J,j @ 14 la ;2 3 a 1 to en s2 13 stCL14ftAL CC0J181*.01 stocgf N EVl11C80 ggs ao tVtaefvtam atecmf 40. CTOE

• Net *ec

@ ,aig,';

, 17 I3 I l--J l 0 I 3 I 31 I/i io I il L! ] l--,j L,.qj

,_2 n  :: 2J I4 de 23 03 .7 JJ 38 2i ACTices syvv.g (pstC' AT"1 ='?t%f %8'"d F*'Vf C "? **:147 TA4Sas AC7:0% CN*tA%T 5".** r.".%

V8:=C wCW81 suivtt 1 80*#3.5 s**Ut

. 'a* vase,s'.cTua E m

@u%@  %, @

L Z,j@

,I.01 0101 01 -

[J.

,j@ [J,,j@

W@ l c l all l S l@

cAuss esscaistiou amo ccaascm a Ac tess @

,,,,,l Investigation revealed that the vind seeed sensor bearinzs were contaminatedt ii,ii pith coal dust causing them to be inocerable at icv vind steeds. 94ad I

• y ppeed sensors were renewed and a Recuest for Encineerfac T- f o ,-- a r i e n- (orTT I i,a3i Iwas generated for an engineerin: evaluation of these events. I i l

I mi . is

'sM s>:ar= or-t. star.s @ Essif*  : smen- :sse...re., @

g {H,,,J @ [0l Oi0l@l Refueling l !3j@lOce-atorObservation I

' .c*r.s . r, " " "

c:( tsr

..u u.  :. .iu u,

.er.st  :. .:m.,, @ l ecir.n o. .tuui @

li91[Z_j iZI91 NA l NA I Pf e909%E L f t80sk agg

,L~.. ,,,, i se ...m

1. i .i l 010 I Ol@iy@l NA l

. .snd'.s.'in ,,:.... =s e l' 6. _.

I 10,

! 0 l 018l : .

'n a

1,C55 set 08 :15.

• ava.

a. **.t :9

'a 8 Aci.if

• I i I 4 I (Z.,j@l NA _j

, . , .: .a k 7'l #

[% 9g

,g@htp;ae,og

(

v

) 1:l'lIL, l

f A

NA i

!IIIttiiiiff !

ss..s Os sagerat i

.T . C mo.' r ..es: 604 ) 795-61.St

. (SEE #TTACIIED SUPPLDENT.'d! INF0D'ATICM SIIEEk')

~

..g g.2 2 7 0 kO -

o

SUPPLEMENTARY INFORMATION

)

[~

\ Report No.: 30-302/78-033/03L-0 Facility: Crystal River Unit #3 Report Date: 7 July 1978 Occurrence Date: 12, 21 & 28 June 1978 Identification of Occurrence: Wind speed indications were lost contrary to Technical Specification 3.3.3.4.

Conditions Prior to Occurrence: Mode 6 Refueling.

Description of Occurrence: At 0200, 12 June 1978 and again at 0800, 23 June 1978, the 175' wind speed recorder and digital readout indicator was not responding to low wind speeds. At 0900, 21 June 1978 and again at 0800, 28 June 1978, the 33' wind speed recorder and digital readout indicator vould not respond to low wind speeds. In all casas investigation revealed that the wind speed sensor bearings were contaminated with coal dust to a point of inoperability at slow speeds. The wind speed sensors were renewed and recalibrated using the Meteorological Monitoring System Calibration Procedure (SP-158) and restored operable within 24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br />.

Designation of Apparent Cause: The cause of these events were due to the contamination of sensor bearings with coal dust.

Analysis of Occurrence: There was no hazard to the health and safety of the plant or general public as no gaseous releasaa were in progress. ,

Corrective Action: Wind speed sensors were renewed and as a result of the failure frequency a Request For Engineering Information (REI) was Senerated for engineering evaluation of this problem.

Failure Data: Third occurrence of the loss of 175' wind speed sensc:r and the second occurrence of the loss of the 33' wind speed sensor.

v

/

t