ML19340F069

LER 80-056/03L-0:on 801219,atmospheric Radiation Monitor RM-A5 Found Inoperable,Rendering Control Complex Emergency Ventilation Sys Inoperable.Caused by Seized Sample Vacuum Pump Due to Normal Wear.Spare Pump Installed & Tested

ML19340F069
Person / Time
Site:	Crystal River
Issue date:	01/12/1981
From:	Hernandez V FLORIDA POWER CORP.
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II)
Shared Package
ML19340F042	List: ML19340F041 ML19340F069
References
LER-80-056-03L, LER-80-56-3L, NUDOCS 8101160634
Download: ML19340F069 (2)

Text

.. m _. _

a.m v. : ,.ur.aa u :a r:a- ::s.su .:.c .

LICENSEE EVENT RE.:CET EXHISl? A V(~N couract. stecc l I I I I I l@ citrug pas;en ;vn u.. age.;,ms g,,c.wees

, [o 1 ai l, l ? l c.cas4a i

LI Q RI c::a

?! 3 lg*ls0 l 0I- l 0 iweassa 4

Oi 0lO svua i 0l ;0;Oa gj:. 4 ;1;?gll1 gg , ,

. c2 sa ..s .. , , a .- a ce s--

L, :_we 3,'.".! Il@i 01 510i::c. -!Oari w..n.

310 1 2 @! u1 I 21 1 I 91 8 0 @!011 i li 2: 8 ' l iG; u .. . *. i e,r :.n  :. n .,,:. : :. n e tvssr esscaiencu 2ac ,aceasi.: caus cutscss @

t o :; [ At 0630 during normal operation it was discovered that Atmospheric Radiation .

ro,3, (Monitor RM-A5 was inopercble rendering the Control Complex Emergency Ventilation ,

to , , , i System inoperable. This created an event contrary to T. S. 3.7,7.1. Emergency ,

i: I s! t Control Complex fans were placed in ' full recirc and maintenance was initiated, ,

t o ! 1 I Operability was restored at 0915. There was no effect upon the health or safety  ;

I ir! l of the general oublic. This was the third occurrence for RM-A5 and the fourth I it., t event reported under t'iis Specification.

Sv 5:tst Cays, ca.51

• C:U. v C::t c:CE Stsc' 04  ::u*cs4%::::t ggsc::g sq ;g le i n)

I S I G l@ [ E l@ d.: @

[P 101 M i P I X I X[@ gg dgvgig CC:anot%Ct a t'.1ts c u

, m ~r -i . vecur tso.

S.e  % TE A L c::, n t .oc..: .

@ s>u &>j;;. .. I 81 of n t--J 10isi6i y [ o f 31 a W. [ _._ d,_ i

:: 2.  :.  :, a a  :.  ::

,Ef,' %We'J c','!5r Tsa' .cu.i 'rT M ir .!.'.".i", 'T,15r . .T.T.;, .

l. A @[Li@ .zLj@ 1. zi@ ,10  ! O I 0 @1 ( Yl@0 I [Nig iAl@ .

l_Ti310104 .,

1 causa eescairr:cs ane ccaasenvs meness 27 i, , o , [ The cause of tiiis event is attributed to a seized sample vacuum pump. The pump ,

t,,ij[ seized due to normal wear. A spare pump was installed and functionally tested. ,

g g ,REI 79-10-9 is undergoing engineering evaluation of the failure of Radiation ,

,,,3, [ Monitor Sample Vacuum Pumps, ,

t...!t i

? 8 9 g 1A .

• Of

• C N(.SrAT*J3 is a' 05:: vip v 130.sia* 9

[i i s I LEJ@ l 019 L 9l@l '

NA l [Al@l Operator observation  ;

• .5,urv C:?tsr '

" " 'o

. u u. teor,es...,u,@

l' i a 1 LZJ @o . aurLzj@l ...:mr e.NA.:,ur @ [

[ NA J

' , .. ,s d' n,c.e" n " " 'e I'I71101010 Q Zj@[:n:..., ,@ NA r

> - * .,., ,s,r ~ s.n " . a e ,,. :n . -es@

l' t e l I nl 01 Ol @l NA l r an ., ,:

,5

• t g e+ c NA I I'I*IL.1.t@l

.,,, $2:. ,.cs @ N'c '5 E ca.Lv

[:Iei 1,._d,~. 81 NA I 't i eiiieiirI "N'ame of Preparer: gjg p

}'04 795-% $6 C-

, (SEE ATTACHID SU??LD'ENTARI DUORF_CICN SEIIT) ,

01- GQf .... . _

SUPPLEMENTARY INFORMATION t Report No.: 50-302/80-056/03L-0 Facility: Crystal River Unit 3 Report Date: January 12, 1981 Occurrence Date: December 19, 1980 identification of Occurrence:

Failure of RM-A5 created an event contrary to Technical Specification 3.7.7.1.

Conditions Prior to Occurrence:

Mode 1 power operation (99%).

Description of Occurrence:

At 0622 a high flow alarm was observed on RM-AS. At 0630 it was determined by investiaation that the sample vacuum pump for RM-A5 had seized. Emergency control complex fans were placed in full recirc and maintenance was initiated.

Operability was restored at 0915.

Designation of Apparent Cause:

The cause of this event is attributed to a seized sample vacuum pump.

Analysis of Occurrence:

There was no effect upon the health or safety of the ceneral public.

Corrective Action:

The sample pump failed due to nornal wear. A spare pump was installed and functionally tested. REI 79-10-9 is under-ooina engineerina evaluation of the failure of radiation monitor sample vacuum pumps.

Failure Data:

This was the third occurrence for RM-A5 and this is the fourth event reported under this Specification.

/rc  ;

..