ML19309C374

LER 80-011/03L-0:on 800306-21,reactor Dewpoint Limiting Conditions for Operation Were Exceeded on One Occasion & Operation in Degraded Mode Occurred on Three Occasions. Caused by Problems W/Buffer Helium Sys

ML19309C374
Person / Time
Site:	Fort Saint Vrain
Issue date:	04/02/1980
From:	Gahm J PUBLIC SERVICE CO. OF COLORADO
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION IV)
Shared Package
ML19309C367	List: ML19309C366 ML19309C374
References
LER-80-011-03L, LER-80-11-3L, NUDOCS 8004080512
Download: ML19309C374 (1)

Text

NRC FOEM 366 v. a. nubbaan nauuta s un v cummewun (7 77)'

• LICENSEE EVENT REPORT A_'

CONTROL BLOCK: l

'

l l

.

l l l e

lh (PLEASE PRINT OR TYPE ALL REQUIRED INFORMATIONI lo I i 8l 9l C l 0UCENSEE 7

l F lCODE S l V l141 l@l 15 0 l 0 l- l 0UCENSEl 0 l NuY8ER 0 l 0 l 0 l- l0 l 026 l@l4 26 l1LICENSE l1 l 2TYPE l 0JGl@l57 CAT l 68 l@

CON'T

'

lol1l

? 8

[O$"cf60l L @l 61 0 l 5 DOCKET l 0 l 0NUMBER l 0 l 2 l 617 68

@l 69 0 EV l 3ENTl0DATE l6 l 810 74 l@l0 l4 75 l0 lCATE REPORT 2 l 81080l@

EVENT OESCRIPTION AND PROBABLE CONSEQUENCES Oto lol2Jl During the period from March 6, 1980, through March 21, 1980, reactor dewpoint limits l

[o13l l of LCO 4.2.11, Figure 4.2.11-1 were exceeded on one occasion, and operation in a de- l l0t4l l graded mode of LCO 4.2.10 occurred on three separate occasions. Recortable ner For* l

[Otsl l St. Vrain Technical Specification AC 7.5.2(b)2. No af feet on publi : health and i 10!sl l sa fe ty. Similar occurrences reported in RO's 77-36, 78-12, 78-18, 78-37, 78-39, I l0l7l [ 79-01, 79-02, 79-24, 79-30, 79-45, and 79-53. I 10141I I 7 8 9 60 CE COCE S SC E COMPONENT CODE SUSC DE S E lo191 9

lC lB l@ y@ lZ l@ l Zl Zl Zl Zl Zl Zl@ W@ lZ l@

10 12 13 18 19 20 7 8 11 SEQUt NTI A L OCCURRENCE REPORT REVISION

_EVENTYEAR REPORT NO. CODE TYPE No.

@ ,*LE R Ro E,%,"; l-l l 0 l 1l ll l/l l013l lL l l-l l0l

_, l218l0l 22 23 24 26 27 28 29 30 31 32 7 K N A ON ON PLANT METH HOURS S8 1 FOR 8. SUPPL MANUFACTURER l33Xlgl34Zl@ lZ l@ lM Z]@ l 0l 0l Ol 0l l Yl@

41 l42N l@ l43Z l@ l44Z l 9 l 9 l 947l@

35 3/ 40 CAUSE DESCRIPTION AND CORRECTIVE ACTIONS h j3 ,0; l Prime cause of high moisture and oxidant levels was problems with buffer helium sys- 1 it Ii1 I tem and corresponding moisture imrress duri e i nn e av*ando a ew*w For ,11 awa*= 1 i, ,7, l corrective action consisted of reducing core outlet temperatures, at which time LCO l jil3l l compliance was restored. No further corrective action is anticipated or required. l l i l 41 l I 7 8 9 80

'

ST  % POWER OTHER STATUS 015 RY OISCOVERY DESCRIPTICN l1 6 5 l l E lh l 0l 4l 0l@l N/A

'

l (_6J@l Personnel Observation / Review of Losts l A TIVt TV CO TENT GELEASEO cP RELEASE AMOUNT OF ACTIVITY LOCATION OF RELEASE Ii 168 l9 l Z l @ J@l N/A l l N/A l

7. to 11 44 45 80

1. ERSONNEL EXPCSURES Nuv88R TYPE DESCRIPTION ^

l i 171 1010 l o l@l Zl@l N/A SO l

PERSONN E L INJURIE$

N oEsCRiPriON@

li l a8 i9l o luv8Ea0 l 0 l@l N/A 7 11 12 "

l

i

'n',*E ' US%^!T c3 *'" @ 8004080513- - -

LLL2JlZl@lN/A

.7 4 s to 80 I.,

PUBLICtTV - NRC USE CNLY OESCRIPTION 45

,

ISSUED i .

l llll lllll!l!lk NAveopens,4pg Td . pyeyg -( 3 785-2253

.