ML17266A394

Updated LER 80-067/01X-1:on 801130,discovered That Some Reactor Trip Breakers Would Not Trip on Undervoltage.Caused by Redundant Uv & Shunt Trip Devices Not Tripping or Tripping Sluggishly.Device Armature Realigned

ML17266A394
Person / Time
Site:	Saint Lucie
Issue date:	01/16/1981
From:	Pace P FLORIDA POWER & LIGHT CO.
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II)
Shared Package
ML17209A615	List: ML17209A614 ML17266A394
References
LER-80-067-01X, LER-80-67-1X, NUDOCS 8102030619
Download: ML17266A394 (2)

Text

eDATE REPORT - PREVIOUS R . RT DATE DECEMBER 15, 1980 NRC POAM SSS U S NUC'LEAR AECULATORV COAIMISSION IT.773 LICENSEE EVEi4T RCPORT I

'O FILI S L SllIQ10 I- I I I LICSiysf NVMefA I Qs 5

4 1 1 LaCZ454 TY?5 1 1Q~IQs

'0 SZ CA ~ 3B ii LICSNSff COOS 1

CON'T 3

"',":,;LLANO 40 41 i 0 0 QQC)CST 0

NUMafR i 44 Llll3 49 fyfNT OAT\

O'OLQi itil Af?QAT QAT 9 i O 30 EVENT OESCAIPTION 'NO PROBABI E CONSEOUENCES

~O Durin normal full ower o QIQ eration it was dis ov d

~03 trip breakers would not tri on undervolta e UV as ex ected. The tri s

breakers have redundant UV and shunt tri devices. One device would not trip and two others tripped sluggishly. The ability of the reactor to 0 9 trip either manually or upon RPS signal was not compromised as evidenced by an unrelated plant trip which occurred durin this investi ation. This is being reported per tech s ec 6.9. 1.8.i. This is 1st LER of this t e.

2 5 9 CQM?.

5Y5T.S 4I CAUSS CAUSS VALVE

, CQQS CQQS SVBCQOS CCM?QNfNT Coof suacoof svecoof

~09 ~IA Qii ~EQis'A Qis L00KTTURKQ 12 1$

~II 19 Q>> ~E 20 Q<<

9 10 11 12 Sf Quf NTIAL OCCIIAAfsYCS Af?QAT AfVISION ~

+a Qss LsAIRO siisai SVS NT YSAA

~00 21 21

~22 24 Rf?OAT NO.

~00 7 ill

~w 21 ss Coof LOI~ 29 TY? 9

~Ã 20 21

~1

~<<'

ACTION ?UTUAS fs4?SC. SIIUTQOWN ATTACHufNT '4?ROW  ?!UMSCOMs, CQM?QNSNT "I, ~

?OAII5US. Sv??l ISR MANU?A TUAfA TAIISN ACT IQ isss~sS .

CN? LANT L'Js ios M 4 TN QO NOVAS Q21 SVBMITT20

<<ss L'JS isL's 44 41 CAUSE OESCRIPTION ANO COAREOTIVE ACTIONS Q12 0 The ino erabl e UV device armature was real i ned and al 1 7 ther IV were manuall exercised lubricated and test d sati f and shunt trip devices were previously tested simultaneously every month A new preventative maintenance ro ram has been initiated to check the .

UV coils independantly on a monthly basis., The breakers are GE type AK-2A.I 2 9

? ACIU.Y ~ MSTI400 0?

OISCOV f AV

'4

."s?O'Af R Q~SRSZAmS Q30 OISCCVSRV OSSCAIPTICN Q31 5~ *TVS 2 4 E Qss ~10 10 0 Qs I'1 12 NA JS LBIQi 4S ACTIVITY CONT jNT RSLSASSO 0> ASLSASS AMQUNTOP ACTIyny Q3S LCCATIQ'IOP AfL<<ASS Q3

~ZO uZQ4 NA 45 NA 30 I

Q<<'""'A I 10 44

? 5 ASQNN 4 L fX?OSVAS 5

~It ~00 2 5 )

0 iQsi'ZQfs II Ia 12 NA 30

?SASQNNf1 IIUVAI'as

~o""o"" o I 3 3 11 I'2 30 LCSS 0? CR 0AM*OS 0?ACILITV QA3

-.Y>f Qf SCAI?TION I

9 ~ZQ42 NA 2 30

?USLICITY sIRC USE O?al.y 3iscAI?r 65 res i's'oi 0 QN NA 2 2 n 4$ 30

? N 305 552 3801 SZO 808 0.'bd

'I