ML19210E320

LER 79-052/03L-0:on 791022,at 9% Power B Instrument Air Compressor Found to Have Insufficient Output While a Compressor Out of Svc.Caused by Bent Piston Rod & Worn Valves.Parts Replaced or Rebuilt

ML19210E320
Person / Time
Site:	Fort Saint Vrain
Issue date:	11/20/1979
From:	Gahm J PUBLIC SERVICE CO. OF COLORADO
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION IV)
Shared Package
ML19210E316	List: ML19210E315 ML19210E320
References
LER-79-052-03L, LER-79-52-3L, NUDOCS 7912040330
Download: ML19210E320 (1)

Text

NRC FORM 366 '

U.S. NUCLEAR REGULATJRY COMMISSION d.m LICENSEE EVENT REPORT CONTROL BLOCK: l l l l l l lh , (PLEASE PRINT OR TYPE ALL REQUIRED INFORMATION)

< l 6 f6 I 8l l9 c l 0LICENSEE 7

l F lCoOE S l V l 1 l@l 0 l 0 -l0l0l0l0l0 14 15 LICENSE NUM8ER l0 l0 l@l4 25 26 l1LICENSE l1 l2TYPs. l0 J0l@l5 7 CAT l  !@

68 CON'T 7

o 1 8

5O RC IL hl0l5l0 60 61 0 l0 2 l 6 l 7 @l 1 l 0 l 2l 2l 7l 9l@l COCK ET NUMSER 68 69 EVENT D%TE 74 11 IREPORT 75 l 2 l DATE 0 l 71980l@

EVENT DESCRIPTION AND PROBABLE CONSEQUENCES h ITTTl l On October 22, 1979, with the plant operating at approximately 9% power and "A" in- l ITTTI I strument air coc: pressor out of service for maintenance, "B" instrument air compressor l o 4 l vas found to have insufficient output. This constitutes operation in a degraded trode l ITTT1 I of Lc0 4.3.6 and is reportable per Technical Specification AC 7.5.2(b)2. No accompanyjng 0 6 l occurrence. No ef fect on public health or safety. Similar occurrence reported in I o 7; l R0 79-29. l o a l I 7 3 g 80 E CODE SUSC E COMPONENT CODE SU8 CODE SU E 7

o 9 8 9 l P l Al@ [E l@ l F l@ l Bl Ll 0l Wl El Rl@

10 11 12 13 18 19 Zl@ l Zl@ 20

,_ SEoufNTIAL OCCURRENCE REPO97 REVISION LER Ro EVENT YE AR REPORT NO. CODE TYPE No.

@ ,ae,g u 7 l9 l l- 10 15 l 2 l l/l l0 3l lLl -

l 0l

._21 22 23 24 26 27 28 29 30 31 32 TK N AC C ONP NT ME HOURS 22 S8 i POR S. SUPPLIE MANUFACTURER lAl@lZl@

33 34 35 Zl@ lM Zl@ 31 0l0l0l0l g

y@

41 42 Nl.g ] @

43 44 Gl0l3l5lg 47 CAUSE JESCRIPTION AND CORRECTIVE ACTIONS h A l Cause of insufficient output was bent piston rod and worn valves and piston contri-i i l buting to less efficient compressor operation. Parts were replaced or rebuilt per l g approved procedure and capacity check upon coc:pletion of repair indicated sufficient l

, 3 l output was available. l i 4 l l 7 a 9 80 STA  % POWER OTHER STATUS 15 RY DISCOVERY DESCRIPTION i s W @ 0l0 g l@l N/A l [,A_jhl Personnel Discoverv l ACTIVITY CO TENT RELEASED OF RELEASE AMOUNT OF ACTtVITY LOCATION OF RELEASE 7

1 6I 3 9 h 10 tt N/A 44 l l N/A 45 80 l

PERSONNEL EXPOSURES NUMBER TYPE DESCRIPTION i 7 l0l0l0l@lZl@lN/A

• 13 a0 l

PERSONNE t iN;u'Ri ES NuMeER oESCRIPTION@

7 t a 8 9 0l0l0l@l 11 12 N/A 80 l

LOSS OF OR DAMAGE TO FACILITY TYPE DESCRIPTION 9 f-lTl l_ Z_j@l N/A .

1472 c i 8 9 10 80 7912040 M 7

' i NRC use ONov ,

ITITl ,$$uEf@oISCRiPriON N l N/A @ l lllllllll 1fl{

• 7 68 69 80 %

/[ df d 7 8 9 to J. W. Gahm . _ ,_ (303) 785-2.253 o