ML19351E613

LER 80-066/03L-0:on Eleven Occasions During 801105-18,plant Operated W/Primary Coolant Oxidants Greater than 10 Ppm & Average Core Outlet Temp Greater than 1,200 F.Caused by Residual Moisture & Leakage Past HV-21352

ML19351E613
Person / Time
Site:	Fort Saint Vrain
Issue date:	12/05/1980
From:	Gahm J PUBLIC SERVICE CO. OF COLORADO
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION IV)
Shared Package
ML19351E606	List: ML19351E605 ML19351E613
References
LER-80-066-03L, LER-80-66-3L, NUDOCS 8012100521
Download: ML19351E613 (1)

Text

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NRC PCEM 366 , - U. S. NUCLEAR REGULATO3Y COMMISSION -

17 771-LICENSEE EVENT REPORT

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CONTROL 8 LOCK: l t

l l 'I I I .Ih (PLEASE PRINT OR TYPE ALL REQUIRED INFORMATiON) lo t ild 9I cl olUCENSEE 7

FI s'l COOg vl 11@ltS0101 -101010101 14 UCENSE NuveER ol l o l'o25l@;641111' l 2 l o l@l$7 CAT UCENSE TYPE JO I

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C ATE 30 4 7 8 60 el NUvegm EVENT DESCRIPTION AND PROSA8LE CONSEQUENCES h Io I2i l During the period from November 5 through November 18, 1980, the plant was operated l

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, with total primary coolant oxidants (the sum of carbois monoxide, carbon dioxide, and ;

,g,,, , water) greater than 10 parts per million and average core outlet temperatures greater l

, ,9,,, ,than 1200*F on eleven separate occasions. These events' constitute a degraded mode of j s '

h ,, g , , LCO 4.2.10 and are reportable per Fort St. Vrain Technical Specification AC 7.5.2(b)2.;

I ,g,,, g Related RO's are 77-36, 78-12, 78-18, 78-37, 78-39, 79-01, 79-02, 7924, 79-30, 79-45, l l o i s i l 79-53, RO 80-11, 80-19, 80-22, 80-25, 80-36, and 80-59. I i 7 8 9 E CCOE ' SL8C E COYPCNENT CODE SLBC QE Su E 4

FJTsl 7 8 I c i s lO LE_J@ Ls_J@ l vl Al tl vi tl xl@ Lr_J@ L2J 9 10 11 12 13 18 19 20

@ i SEcuENTIAL OCCURRENCE REPORT REVISION

• LgR EVENT YEAR REPORT NO. CODE TYPE No.

@ yg,no a l 81 01 l-l l 01 61 61 l/l lo 13 l lLI l-l LO.J 22 23 - 24 26 27 28 29 30 31 32

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K N AC C C PLANT VET 'NOURS SB T FoR 8. SLP Li MA F CTURER j l33A- l@lx l@ l35 z l@ . l_;j@ lo Io Io Io I h_J@ Ld@ LM@ Iv lo Ia lo l@ 47 34 36 38 40 el 42 43 44

CAUSE OESCRIPTION AND CORRECTIVE ACTIONS 27  !

! 1 i 4 o l l Residual moisture from previous moisture ingress in October and leakage past' HV-21352 1 i , , , i l resulted in high primary coolant total oxidants. Valve is Velan Model P-33876-N/78R. I j ,, ,,,j Valve disc changed to brass =odel. A more permanent long term fix has been designed l

, ,,,3, i as part of a helium auxiliary loop split project. Modifications vill be installed g i i,i4i ;during next scheduled refueling. l so

. 7 ae S  % PCWER OTH ER STATUS I PY CISCOVERY CESCRIPTION ST l1 15l 1E_J @ 10 15 10 l@ln N/A I b,4jhlooeratorobservatien I as 7

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• ELE 4 SED CP RELEASE AMOUNT OF ACTIVITY LOCATICN OF RELEASE

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• ERSONNEL EXPCSURES

' TYPE' NuveER OESCRIPTtCN 39 l-I i I 7 l l 010 l 0 l@W@l N/A -

• ERSONNEL INJU IES ~

NuveER DESCRIPTION l

l1 jaliOl~0l0l@l N/A- 80 l

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LCSS CF OR 04 MAGE To FACILITY l t- TYPE CESCRIPTION .'

i IiI91 1Zj @l N/A' 30 I

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! & PS*CN E:

(303) 745-2224- 2 l NAME OF PREPARER '

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