05000267/LER-1980-049-03, /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: Difference between revisions

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#REDIRECT [[05000267/LER-1980-049-03, /03L-0:on 800904,PCRV Rupture disc,M-11702, Setpoint Set at 826 Psig Rather than 812 Psig.Caused by Drift in Belleville Washer Operating Point.Threaded Ring Adjusted Until Rupture Disc Actuated at Correct Setpoint]]
{{Adams
| number = ML19351G409
| issue date = 02/13/1981
| title = /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
| author name = Gahm J
| author affiliation = PUBLIC SERVICE CO. OF COLORADO
| addressee name =
| addressee affiliation = NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION IV)
| docket = 05000267
| license number =
| contact person =
| document report number = LER-80-049-03X, LER-80-49-3X, NUDOCS 8102230648
| package number = ML19351G407
| document type = LICENSEE EVENT REPORT (SEE ALSO AO RO), TEXT-SAFETY REPORT
| page count = 1
}}
{{LER
| Title = /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
| Plant =
| Reporting criterion =
| Power level =
| Mode =
| Docket = 05000267
| LER year = 1980
| LER number = 49
| LER revision = 3
| Event date =
| Report date =
| ENS =
| abstract =
}}
 
=text=
{{#Wiki_filter:.
N AC7 9M 366 U. S. NUCLE AR REGULATORY COMMISSION I
7 7;V LICENSEE EVENT REPORT 00sract t>L0c<. [ I I
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,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 i had net been ovepressuriced during this surveillance interval and there was no effecq
.g;
,, - : en plan: operation.
"o effect en public hea th o r saf ety.
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im i
!-] l coerating ceint.
No addi:ianal snac-over tests revealed that the rutture disc set-I
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{{LER-Nav}}

Latest revision as of 02:02, 18 September 2025

/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:
References
LER-80-049-03X, LER-80-49-3X, NUDOCS 8102230648
Download: ML19351G409 (1)
v • d • e


LER-1980-049, /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
Event date:
Report date:
2671980049R03 - NRC Website
v • d • e

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 {h (PLEASE PRIN: OR TYPE ALL REcutRED INFORMATICN) i e

i l: I 2 l 0l@{

IqInIaI IOInj@l4I u e se @

l l

l e i < l +;l

!@l q l c l l 0 I O ia j -l l c! O 3 a

..c NsEE :::E

4 s

.. ewe w veEa a

e a:ENsE n85 a

v-

,";3"j lj@!O ! 5 10 10 to 12 16 17 @lnioIaI4Ialn @;l012lil3I;Ii G l: I i

o e

sE NLvsEm w

sa E<ENT:Are

4

_s

= Eacar : ATE 20 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 i had net been ovepressuriced during this surveillance interval and there was no effecq

.g;

,, - : 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 j

N'*EAm A E80 A? NO,
E 7pE c

=2s 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 N

O N f I

l I

O 2!5 5

2

~

lO 4

.1

.6 3s 40 41 4:

43 44 47 CAusE Esca:Ar :N ANO CO A AE rN E AC*'ONS l Ru :ura disc novenent setroint cut of tolerance due to drift of the 3elieville washer !

im i

!-] l coerating ceint.

No addi:ianal snac-over tests revealed that the rutture disc set-I

,., j l peint was in clerance.

i ill i I

i 2 1 !

I ao a a h

VE*wC: 8 s 2::; 'v 3:AS NacaE=

r-e= srArLs c

is; 2Eav
is::v Eav :Esca st:cN _.

i !"i lSl@ l0l0l1!hl ?UA l

l3l@l Schedaled Su-veillance Tes:

l

)

J 11 45 asi 30 A:T*, cv : N*EN?

06 hl

- ': / A I

LOCATICN F 3ELEASE 2ELEASE: 08 SELEASE AVCLN?:8 A;rW l'Y l

i !sj l :l 9 : IS.yl ': / A

- y 3 3 11 44 45 30 8EJS:NNELE480SLAES NLveEm
  • v8E CES #'P*'ON 3 l

t-l l0 10 10 ]@lZ l@l :UA l

4 3 t

a ao

  • EASNNE. NJLP'E3
Escsie:cNh NuvsE=

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

a 3 n

1:

aa E

sa::y 'v Q

  • ;SS OF :n Ava:

O g s;niav:CN

.se l l 3l lC I@l :/A l

s 9

'O 60 Y0%#

y @ l s p ps,cs l

II IIIllI Ii i i i. !,

1. :. O i l ': lv ':/A g/

id 69 30 ;

3 3

'/pu (303) 785-2224

)

e j -

aucNr:

3 SJg og uvE cs paE=AaEn

+

f f

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