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

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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

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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

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