ML19351G409

LER 80-049/03X-1:on 800904,PCRV Rupture Disc M-11702 Setpoint Found Exceeding Tech Spec.Caused by Belleville Washer Operating Point Drift.Addl Tests Showed Setpoint in Tolerance

ML19351G409
Person / Time
Site:	Fort Saint Vrain
Issue date:	02/13/1981
From:	Gahm J PUBLIC SERVICE CO. OF COLORADO
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION IV)
Shared Package
ML19351G407	List: ML19351G406 ML19351G409
References
LER-80-049-03X, LER-80-49-3X, NUDOCS 8102230648
Download: ML19351G409 (1)

Text

.

N AC7 9M 366 U. S. NUCLE AR REGULATORY COMMISSION I

7 7;V LICENSEE EVENT REPORT 00sract t>L0c<. i

[I I  ! I I e

{h (PLEASE PRIN: OR TYPE ALL REcutRED INFORMATICN) ia j -l l c! O l e i < l +;l  !@l q l c l l 0 I O IqInIaI IOInj@l4I a e ia:ENsE l: I 2n85 l 0l@{ a l

u e se @

l 3 a ..c NsEE :::E ;4 s .. ewe w veEa

v-l: I i ,";3"j

,' lj@!O e

! 5 10 10 to 12 16 w 17 @lnioIaI4Ialn sa E<ENT:Are :4 _s

@;l012lil3I;Ii

= Eacar : ATE 20 G

$ o  :::sE NLvsEm Ev Esr EscRipTrcs A'.0 aACe AsLE CONSEOuENCES h i3 i! I Durinc a naintenance shutdcwn, while perfor .ine routine surveillance testing of PCRV

,3; ; rupture disc, ".-11702, its setoint was Q"nd to be 326 psig. This is outside the j

,,2 , ! S12 psig - l'; allcwed by Fort St. Vrain Technical Specification LSSS 3.3.2(c) and is j i ; , ; being reported per Fort St. Vrain Technical Specification AC 7.5.2(b)1. The reactor l

! .g; i had net been ovepressuriced during this surveillance interval and there was no effecq

,, - : en plan: operation. "o effect en public hea th o r saf ety. Similar report R0 79-13. l l

. i i .

$0 3 3 S v S* E V OAWSE CALSE  ::v8 . A us E 2005  : CE 5.9 0:E 'OY8CNEN*:::i 5.9:::E .E:::c l isl l C! A! fX l l3f f 5 !I I

!X!5!  !

! :l  ! :l8 I

< + o  : a , a SE L EN?' A %  :: 83ENCE mEaca? 4 ETS + cN

=2s j :N'*EAm A E80 A? NO,  :::E 7pE c 8~ E 85 ~

t !310l l-l l014l9I l/! l0 l 3 l lX l lH l1 l

.i .: J 24 .6 . 9 :3 =0 . ..

a!? CN s +. m E E881:* 5 %. 'O cm. O AT A:-YE'.* N8D 4 82 Y8 ;;* *  : Y8 NEN'

• A(EN a:* :N ONP.aN* VET-C CLas 3..) 5;gy m ;; s;cy ug - po ; g Y AN.8 A %8 E A 5 2

~

lO N O 41 Nf I l I O 2!5

.. 4 .1 .6 3s 40 4: 43 44 47 CAusE Esca:Ar :N ANO CO A AE rN E AC*'ONS

, im l Ru :ura disc novenent setroint cut of tolerance due to drift of the 3elieville washer !

i  !-] l coerating ceint. No addi:ianal snac-over tests revealed that the rutture disc set- I

, . , j l peint was in clerance.

I i ill i I

i 21!

a a ao r-e= srArLshc s 2::; 'v VE*wC: 8 3:AS NacaE= :is; 2Eav :is::v Eav :Esca st:cN _.

i

!"i lSl@

$ )

l0l0l1!hl ?UA J 11 &&

l l3l@l 45 Schedaled Su-veillance Tes:

asi 30 l

A:T* , cv : N*EN?

i !sj l :l 3 3 2ELEASE: 08 SELEASE

-y 9 : IS.yl ': / A

11 AVCLN?

8 A;rW l'Y hl 44

- ': / A l

45 LOCATICN F 3ELEASE 06 30 I

8EJS:NNELE480SLAES NLveEm *v8E CES #'P*'ON 3 l t-l l0 10 10 ]@lZ t  :

l@la :UA ao l

4 3

• EASNNE. NJLP'E3 NuvsE= :Escsie:cNh

{ i; j l0 la 10 l@l N/A aa l

a 3 n 1:

.  ;SS OF :n Ava:

.se O g s;niav:CN E sa::y 'v Q l l 3ls 9lC I@l :/A

'O 60 l

Y0%# ,

1. : . O i l ': ylv

@ l s p ps,cs

':/A . l II IIIllI Ii i i i. !,

3 3  :: g/ id 69 30 ;

e + '/pu aucNr: (303) 785-2224 )

SJg og uvE cs paE=AaEn j - 3 f _

f