ML19305C076

LER 80-007/03L-0:on 800219,during Testing,Two of 12 Helium Circulator Seal Malfunction Pressure Differential Switch Units Tripped Outside Limits.Caused by Dirt Accumulation in Electrical Switches.Switches Adjusted

ML19305C076
Person / Time
Site:	Fort Saint Vrain
Issue date:	03/18/1980
From:	Gahm J PUBLIC SERVICE CO. OF COLORADO
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION IV)
Shared Package
ML19305C073	List: ML19305C072 ML19305C076
References
LER-80-007-03L, LER-80-7-3L, NUDOCS 8003250555
Download: ML19305C076 (1)

Text

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NRC POIhe 384 U. S. NUCLEAR REGULATORY COMMIS$3ON (7J7) * -

LICENSEE EVENT REPORT

' CONTROL sLOCx: I i 1 1 I p ietE4SE rRiNT OR Tves att REOuiREo iNeORMariONi lo lil8I 9C10UCENSEE 7

l FI SCODE I vi ll@l 14 o l o l-l o l ouCENSE 15 l o lNUMBER 0 l o I- 1 o 101@l 25 26 4 l11112101@l UCENSE TYPE JO I

57 CAT 58 l@

CON T lol11 g l L l@l 0l 5 l 0 l 0 l 0 l 2 l 6 l 768@l69012 l1 l 9 l 8 l 0 ]@l0 74 75 l3REPORT 11 l818 DATE lo80l@

? 8 60 61 QOCKET NUMSER EVENT QATE EVENT DESCRIPTION AND PROSABLE CONSEQUENCES h 10121 l During testing. it was discovered that two of twelve helium Mrculator seal mi ftme- 1 ITTT1 I tion pressure differential switch units tripped outside the limits of LCO 4.4.1, l l o 14 l l Table 4.4-3. Reactor operation during test interval. Reportable per Technical Soeci-l ITTTi i fication AC 7. 5. 2 011 and AC 7. 5. 2 (b) 2. No effect on public health or safety. Re- I

~

lo is l l dundant system available and operable. Similar reports are RO 77-47. Final, and Pre- l loI7l l 11minary reporta RO 78-27, RO 79-32, and RO 79-56. I I

1o1811 i ScS'E YoiE sVTCiEs CoMeoNENT CODE SUS CO'E SU N E E

7 8 l Cl Blh Wh l E lh l Il Nl Sl Tl RI Ulh Wh W h 9 10 11 12 13 18 19 20 SEoOENTIAL OCCUR RENCE REPORT REVISION LER EVENT YEAR REPORT NO. CCOE TYPE No.

@ ,as u g/Ro 18 10 I [23_] 10 1017I I/I 10 13I IL1 1-1 10 i

_ 21 22 24 26 27 28 29 30 31 32

. N C 0 P T M HOURS SUS I P 8. U MAN P RER

'lux l@[J_j@ lzl@ Lz_j@ l 01010 Io gI Ly_j@ l42N l@ LLj@ lM 810 I81047l@

34 a 3 37 43 4 CAUSE DESCRIPTION AND CORRECTIVE ACTIONS h g l ITT Barton Model 289 pressure differential switches failed to actuate at trip point l g l due to dirt ace'=ntstion in electrical switches. Affected switches re-adiusted to I

i 2 I proper trip points. Trip settings being checked on a monthly basis. Redesign of -l

,,3i l system being evaluated. l l i l41 l I 7 8 9 80

'#2UY sPoweR oTwsmsTATus @NoEEkv# oiscovERY osSCRirTio= @

i s J@ l 0 l 010 l@l N/A l l C l@l Operability Test l 7

s ,- g 12 ti 44 de as so l

AmouwTon Ac71vity h l Location cP RatsAss h i t s RutE4sso@os l Zl ReLEasEg lN/A lN/A l l r s 9 30 si 44 as so PERSONNEL EXPOSURES NUMSER TYPE oESCRlPTION l i j 7 l l 0l 0 l 0l@]@l N/A l P.R oNN.'t%u'4Es NUMSER ossCRirricNh I

Lu.8J 7 8 9 l 0101 Ol@l12N/A 11 90 Loss OF CR OAMAGE To PActuTv

, , gi y;;"o- -=c soostses & g 4 7 8 9 10 30 Neu NRC USE CALY 3g, ,

mTi l NI@l N/A i liii!itiril'Il Ad dA. ..

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