ML19318B999: Difference between revisions
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{{#Wiki_filter:_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ | {{#Wiki_filter:_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ | ||
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4" n 1 2 pg 0; 9,1 l6l7; 9. gaa,:.r 0; 6l1;7;8;0;g | |||
: : 42 i e +2 .i : Cz ar w.... . svi r:4rs i. ri avsNT ces:AipncN ANo eacsAsts ccNsteusNess lo i 2l I At 1153 in Mode 1, it was reporte hat the channel "D" Rractor Building high , | : : 42 i e +2 .i : Cz ar w.... . svi r:4rs i. ri avsNT ces:AipncN ANo eacsAsts ccNsteusNess lo i 2l I At 1153 in Mode 1, it was reporte hat the channel "D" Rractor Building high , | ||
.go,3, gp resssure bistable tripped. This created an event contrary to Technical Speci- , | .go,3, gp resssure bistable tripped. This created an event contrary to Technical Speci- , | ||
,fication 3.3.1.1. Noeffectupontheplantorgeneralpublicasredundantreactoy | ,fication 3.3.1.1. Noeffectupontheplantorgeneralpublicasredundantreactoy | ||
Line 32: | Line 28: | ||
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$ 9 3J Sv 5*,M CAUSE C a'.51 . COU' va ty t COCE C00E 5b8:003 C0980NENT 004 163- 01 s-l019l [ Il Al g [ E g [E l g [I jNl Sl Tg Rg Uj g l F g a--}:t[Zg sq i 4 . 9 10 tt 12 12 18 ;3 | $ 9 3J Sv 5*,M CAUSE C a'.51 . COU' va ty t COCE C00E 5b8:003 C0980NENT 004 163- 01 s-l019l [ Il Al g [ E g [E l g [I jNl Sl Tg Rg Uj g l F g a--}:t[Zg sq i 4 . 9 10 tt 12 12 18 ;3 | ||
- $10Vtwr1AL CC:;gnENCI s t *0 e r m3vis:09 | - $10Vtwr1AL CC:;gnENCI s t *0 e r m3vis:09 | ||
@[h ._ u E9 I I ! | @[h ._ u E9 I I ! | ||
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Line 44: | Line 38: | ||
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CWC us wCues *2 ss | |||
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[n Z lg l Zlg | [n Z lg l Zlg | ||
Line 53: | Line 45: | ||
.a l gg v | .a l gg v | ||
lNlg | lNlg | ||
[A l g a | [A l g a | ||
lS | lS l | ||
l | |||
cALSE CESCA18TICN ANC c0 AREOOVE AO* IONS i;a;I The cause of this event is attributed to corrosion buildup on Reactor Building , | cALSE CESCA18TICN ANC c0 AREOOVE AO* IONS i;a;I The cause of this event is attributed to corrosion buildup on Reactor Building , | ||
, pressure switch BS-62-PS. The switch was disassembled, cleaned, dried, re- | , pressure switch BS-62-PS. The switch was disassembled, cleaned, dried, re-assembled, and returned to service at 1455. The associated pressure switch | ||
assembled, and returned to service at 1455. The associated pressure switch | |||
,,,3, l cabinet was dried and temporarily covered with visqueen to prevent recurrence l | ,,,3, l cabinet was dried and temporarily covered with visqueen to prevent recurrence l | ||
,,,,, , until roof repairs are effected. | ,,,,, , until roof repairs are effected. | ||
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... f t*C3usts = u:.. .r,e, 1: 171 l O! 0 ! 0 l@l Zj@[ NA l | ... f t*C3usts = u:.. .r,e, 1: 171 l O! 0 ! 0 l@l Zj@[ NA l | ||
' ' ' . s,m.e'6,w'ies | ' ' ' . s,m.e'6,w'ies w esen cisnir'es@ | ||
w esen cisnir'es@ | |||
lir I = en i I 03 0 l O l@l,: NA l | lir I = en i I 03 0 l O l@l,: NA l | ||
,, sa | ,, sa | ||
*.r-cs* C8 Ce emcav.a.,;g ies to sacurv 0@P D Q | *.r-cs* C8 Ce emcav.a.,;g ies to sacurv 0@P D Q | ||
D n | D n | ||
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r e s es se u Nr.tas c ~ preparer: K. F. Lancaster , . (904) 795-6486 (SEE ATTAND SU??LDfENTARY INFORMATION Sc.:.II) | r e s es se u Nr.tas c ~ preparer: K. F. Lancaster , . (904) 795-6486 (SEE ATTAND SU??LDfENTARY INFORMATION Sc.:.II) 80'06300 @/ | ||
80'06300 @/ | |||
s, SUPPLEMENTARY INFORMATION Report No.: 50-302/79-086/03L-1 | s, SUPPLEMENTARY INFORMATION Report No.: 50-302/79-086/03L-1 | ||
Line 107: | Line 77: | ||
At 1153, it was reported that the channel "D" Reactor Building high pressure bistable tripped. The affected channel was placed in the tripped mode at 1252. Further investigation revealed that Reactor Building pressure switch BS-62-PS had failed. | At 1153, it was reported that the channel "D" Reactor Building high pressure bistable tripped. The affected channel was placed in the tripped mode at 1252. Further investigation revealed that Reactor Building pressure switch BS-62-PS had failed. | ||
Maintenance restored operability. BS-62-PS was returned to service at 1455 following post-maintenance testing. | Maintenance restored operability. BS-62-PS was returned to service at 1455 following post-maintenance testing. | ||
Drsignation of Apparent Cause: | Drsignation of Apparent Cause: | ||
The cause of this event is attritot-d to corrosion buildup on Reactor Building pressure switch BS-62-PS, due to moisture accumulation in the associated pressure switch cabinet (3A4) rather than the dust as originally reported. | The cause of this event is attritot-d to corrosion buildup on Reactor Building pressure switch BS-62-PS, due to moisture accumulation in the associated pressure switch cabinet (3A4) rather than the dust as originally reported. | ||
Line 118: | Line 87: | ||
/rc l 1 | /rc l 1 | ||
l l | l l | ||
l 1 | |||
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._. _._. , . . . .. . ,}} | ._. _._. , . . . .. . ,}} |
Latest revision as of 05:26, 16 March 2020
ML19318B999 | |
Person / Time | |
---|---|
Site: | Crystal River |
Issue date: | 06/17/1980 |
From: | Lancaster K FLORIDA POWER CORP. |
To: | NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II) |
Shared Package | |
ML19318B997 | List: |
References | |
CS-80-166, LER-79-086-03L, LER-79-86-3L, NUDOCS 8006300401 | |
Download: ML19318B999 (2) | |
Text
_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _
Nac gau :s4 u. s. Nue:. san nzCutArcay ::=uissicN l an
, ' LICENSEE EVENT REFCRT EXHIBIT A ccNract stecc: l I I I I I l@ (Pt. East PalNT CA TyH Au. AtcutRt: INFC AMAUCN)
)
, lo Ii .l ,l F I LI Q R) 713 Jgl 010-l- I Oi 0[0] 0l0 [-l0 i 0a lg 4 ; 1; 1[1 l 1 lg _ l _ ; g i vea m Cc:a i. u ucassa w v.a. a ucissa r . .a u -: a covT i letiI "j"'C * ' l Li@l O i 510 l -r 0 t 3l0 4" n 1 2 pg 0; 9,1 l6l7; 9. gaa,:.r 0; 6l1;7;8;0;g
- : 42 i e +2 .i : Cz ar w.... . svi r:4rs i. ri avsNT ces:AipncN ANo eacsAsts ccNsteusNess lo i 2l I At 1153 in Mode 1, it was reporte hat the channel "D" Rractor Building high ,
.go,3, gp resssure bistable tripped. This created an event contrary to Technical Speci- ,
,fication 3.3.1.1. Noeffectupontheplantorgeneralpublicasredundantreactoy
,o,,,gprotection channels were operable. This is the first occurrence of this type ,
Io.6IIreported. g la e 1I I __
l taisi1 _
$ 9 3J Sv 5*,M CAUSE C a'.51 . COU' va ty t COCE C00E 5b8:003 C0980NENT 004 163- 01 s-l019l [ Il Al g [ E g [E l g [I jNl Sl Tg Rg Uj g l F g a--}:t[Zg sq i 4 . 9 10 tt 12 12 18 ;3
- $10Vtwr1AL CC:;gnENCI s t *0 e r m3vis:09
@[h ._ u E9 I I !
zz l-I u
10"iY"6 n.
l u
l jft v
i SI 3l n :,
l Ll u
g v
l7l CWC us wCues *2 ss ((as gY N CN P r 7:n s v 3s7lI; og$
Iu D !g[ Zlg ,
[n Z lg l Zlg
.. 2
[0l0lOl
.a l gg v
lNlg
[A l g a
lS l
cALSE CESCA18TICN ANC c0 AREOOVE AO* IONS i;a;I The cause of this event is attributed to corrosion buildup on Reactor Building ,
, pressure switch BS-62-PS. The switch was disassembled, cleaned, dried, re-assembled, and returned to service at 1455. The associated pressure switch
,,,3, l cabinet was dried and temporarily covered with visqueen to prevent recurrence l
,,,,, , until roof repairs are effected.
> s , er 5 % Ogm Crd ia 3rArV3 15 3 2'$0 vEnv 223C*ip*:CN I !$ I J@ l 017 l 2 l@l NA l [ Bl@l Operator observaticn l
- !ns,rv
. C:trisr
" a a meu o c. . uus . teCir,es e. .,uu, @
i s L, zJ @ i LzJ@li, ...mr NAe. . mirv @ ll .,
l
.2 PSRSo.NN46rv.,
... f t*C3usts = u:.. .r,e, 1: 171 l O! 0 ! 0 l@l Zj@[ NA l
' ' ' . s,m.e'6,w'ies w esen cisnir'es@
lir I = en i I 03 0 l O l@l,: NA l
,, sa
- .r-cs* C8 Ce emcav.a.,;g ies to sacurv 0@P D Q
D n
3-i in191IZi@l NA kh l\ 1 f\ h w ua l
r ae io ,
---u- ,a
' ' {,' ', . ,,,,,,,s @ Nac .siCNLv
- o @lto NA J ,lIl'lifffII II (
r e s es se u Nr.tas c ~ preparer: K. F. Lancaster , . (904) 795-6486 (SEE ATTAND SU??LDfENTARY INFORMATION Sc.:.II) 80'06300 @/
s, SUPPLEMENTARY INFORMATION Report No.: 50-302/79-086/03L-1
'Fccility: Crystal River Unit #3 Ripsrt Date: 17 June 1980 Occurrence Date: 16 September 1979 Idtntification of Occurrence:
One reactor protection channel (channel "D" Reactor Building hig pressure) inoperable contrary to Technical Specification 3.3.1.1 Conditionr,P*ior to Occurrencer Mode 1 power operation (72%)
D:scription of Occurrence:
At 1153, it was reported that the channel "D" Reactor Building high pressure bistable tripped. The affected channel was placed in the tripped mode at 1252. Further investigation revealed that Reactor Building pressure switch BS-62-PS had failed.
Maintenance restored operability. BS-62-PS was returned to service at 1455 following post-maintenance testing.
Drsignation of Apparent Cause:
The cause of this event is attritot-d to corrosion buildup on Reactor Building pressure switch BS-62-PS, due to moisture accumulation in the associated pressure switch cabinet (3A4) rather than the dust as originally reported.
Analysis of Occurrence:
No effect upon the plant or general public as redundant reactor protection channels were operable.
Corrective Action:
The pressure switch was disassembled, cleaned, dried, reassemble and returnedEto service at 1455 following satisfactory com-pletion of SP-ll2, Calibration of the Reactor Protection System. Channels A, B, and C switches exhibited no corrosion buildup when inspected per Work Request 9958 and on subsequent checks during current outage.
Failure Data:
This is the first occurrence of this type. reported.
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