ML19345A954: Difference between revisions
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4 (PLEASE P9 INT OR TYPE ALL REQUIRED INFORMATIONI 1011d il I N LaCENSEE I E ! FCOCE I C 15 I l l@l 0 !O !O to 10 10 10 in 10 l025l0 10 uCENSE NUM8ER 26 l@l L. CENSE a l TveE114011 il57 1l@l l | 4 (PLEASE P9 INT OR TYPE ALL REQUIRED INFORMATIONI 1011d il I N LaCENSEE I E ! FCOCE I C 15 I l l@l 0 !O !O to 10 10 10 in 10 l025l0 10 uCENSE NUM8ER 26 l@l L. CENSE a l TveE114011 il57 1l@l l | ||
CAT 6d l@ | CAT 6d l@ | ||
15 00vT laiti ,T ,% I L l@l0151010101218 is '@l1 10 12 17 18 10 i@ll sd 69 (V ENT 3Afg 74 75 11DATE assCRT 101318IOl@ 30 | 15 00vT laiti ,T ,% I L l@l0151010101218 is '@l1 10 12 17 18 10 i@ll sd 69 (V ENT 3Afg 74 75 11DATE assCRT 101318IOl@ 30 | ||
* SQ 63 CCCK ET NvV9ga EVENT OESCRIPTtCN ANo PnC9ABLE CONSECUENCES h la 6 2i ! Ourino the cerformance of Surveillance Test ST-ESF-5. Section .1 (the monthlv 3C 1 taia!I secuencer timer testLtirer P4-6 ( Aux. P4 Pumo) on secuencer S1-2 f ailed to time out 1 1, i a i I within the crescribed limit. Durino the time of the failure, the DC secuencer cir- 1 I,i3i i cuitry which activates P4-6 as well as the AC and DC secuencer circuitrv actuatino i I | * SQ 63 CCCK ET NvV9ga EVENT OESCRIPTtCN ANo PnC9ABLE CONSECUENCES h la 6 2i ! Ourino the cerformance of Surveillance Test ST-ESF-5. Section .1 (the monthlv 3C 1 taia!I secuencer timer testLtirer P4-6 ( Aux. P4 Pumo) on secuencer S1-2 f ailed to time out 1 1, i a i I within the crescribed limit. Durino the time of the failure, the DC secuencer cir- 1 I,i3i i cuitry which activates P4-6 as well as the AC and DC secuencer circuitrv actuatino i I | ||
I a is 1 I the redundant Aux. Feedwater Puro (P4-10) were found to be coeratinc as desianed. | I a is 1 I the redundant Aux. Feedwater Puro (P4-10) were found to be coeratinc as desianed. | ||
I 13 71 I I | I 13 71 I I | ||
} ) l3i I gg | } ) l3i I gg 7 ) 00MP. VAL %E SY ST!'.t OAUSE CAUSE CCOE ;OCE SLSCOCE COMPCNENT OOCE SUSCOCE 365COCE laint LS,lH l@ lE l@ l3 l@ l R l E I L i A i Y l 'aX l@ lM l@ lZ l@ d ;J | ||
7 ) 00MP. VAL %E SY ST!'.t OAUSE CAUSE CCOE ;OCE SLSCOCE COMPCNENT OOCE SUSCOCE 365COCE laint LS,lH l@ lE l@ l3 l@ l R l E I L i A i Y l 'aX l@ lM l@ lZ l@ d ;J | |||
$ 3 'o et t: 13 | $ 3 'o et t: 13 | ||
* EV ' sic N 3ECU ENTI AL OCOURRENCE aE*CRT | * EV ' sic N 3ECU ENTI AL OCOURRENCE aE*CRT | ||
| Line 50: | Line 45: | ||
42 43 44 47 Auss cescRiaTicN ANC 00ARECTIVE ACTIONS @ | 42 43 44 47 Auss cescRiaTicN ANC 00ARECTIVE ACTIONS @ | ||
i i ;! l The failure of the relav to time out within i ts crescribed limit was due to a stickv I iijl aceratinc mechanism. The Bliss Eacle timer was reolaced with 3 soare which was ! | i i ;! l The failure of the relav to time out within i ts crescribed limit was due to a stickv I iijl aceratinc mechanism. The Bliss Eacle timer was reolaced with 3 soare which was ! | ||
; i . , i testec satisfactorily for aceration cer ST-ESF-5 (F.1'). I | ; i . , i testec satisfactorily for aceration cer ST-ESF-5 (F.1'). I i ! -1l l'iai 1 30 7 3 3 P actLITY > VETHCO CP ITATUS %PCWER OTHER STATU? CISCOV ERY OISCOVERY OESCRIPTtCN I i ii 5l I9E l@ l 'O01 7 ! S12l@l11 NA l lBj@l Surveillance test i 44 45 46 30 7 | ||
i ! -1l | |||
l'iai 1 30 7 3 3 P actLITY > VETHCO CP ITATUS %PCWER OTHER STATU? CISCOV ERY OISCOVERY OESCRIPTtCN I i ii 5l I9E l@ l 'O01 7 ! S12l@l11 NA l lBj@l Surveillance test i 44 45 46 30 7 | |||
AC*1VITY CONTENT 4EL2ASED QP aELEASE AMOUNT OF AC*1VITV LOCATICN CP RELEASE l1 l 353l l Z l h l lihl UA ] | AC*1VITY CONTENT 4EL2ASED QP aELEASE AMOUNT OF AC*1VITV LOCATICN CP RELEASE l1 l 353l l Z l h l lihl UA ] | ||
44 l | 44 l | ||
45 NA 30 l | 45 NA 30 l | ||
s 13 11 | s 13 11 | ||
*ERSONNEL EXPOSURES | *ERSONNEL EXPOSURES NuveEm *V8E O E SCRIP''ON l i l ,l l 0 l 010 !@l Z l@l JA l | ||
NuveEm *V8E O E SCRIP''ON l i l ,l l 0 l 010 !@l Z l@l JA l | |||
' 13 30 5 7 11 12 8ER$CNNELiN;LR:E3 NUMBER OESCRIPTICN | ' 13 30 5 7 11 12 8ER$CNNELiN;LR:E3 NUMBER OESCRIPTICN | ||
{t j2 1 l01010 l@l NA 30 | {t j2 1 l01010 l@l NA 30 | ||
| Line 74: | Line 63: | ||
** s* | ** s* | ||
/Q | /Q | ||
-s 'o 1 | -s 'o 1 8 03 3 gggtl79xandy Mueller .vN E-NAvEespAEpAAss =*cNE: 102 126 1011 a | ||
8 03 3 gggtl79xandy Mueller .vN E-NAvEespAEpAAss =*cNE: 102 126 1011 a | |||
+1 | +1 | ||
) | ) | ||
LER No. 80-027 4 | LER No. 80-027 4 | ||
Omaha Public Power District | Omaha Public Power District Fort Calhoun Station Unit No.1 Docket No. 0500028S | ||
Fort Calhoun Station Unit No.1 Docket No. 0500028S | |||
! Attacnment No. I | ! Attacnment No. I | ||
; | ; | ||
Safety Analysis | Safety Analysis i The Fort Calhoun Station Unit No.1 is so designed that no single j . failure can prevent the safe shutdown of the plant, if required. The | ||
i The Fort Calhoun Station Unit No.1 is so designed that no single j . failure can prevent the safe shutdown of the plant, if required. The | |||
: failure of tt:e FW-6 timer relay associated with AC sequencer 51-2 would t | : failure of tt:e FW-6 timer relay associated with AC sequencer 51-2 would t | ||
not have prevented the complete anc proper loading of essential safe- | not have prevented the complete anc proper loading of essential safe- | ||
| Line 100: | Line 78: | ||
. were operable and in auto standby. (Sl-1 and $2-1 are the DC powered | . were operable and in auto standby. (Sl-1 and $2-1 are the DC powered | ||
; sequencers fed from the "A" and "B" engineered safeguards channels re-spectively). The derived signal sequencers 51-2 and $2-2 were then separately bypassed as per ST-ESF-5 to test their Bliss Eagle timing relays. (Sl-2 and S2-2 are the AC paered sequencers fed from "A" and "B" channels respectively). Had the need for FW-5 (Auxiliary Feedwater 4 | ; sequencers fed from the "A" and "B" engineered safeguards channels re-spectively). The derived signal sequencers 51-2 and $2-2 were then separately bypassed as per ST-ESF-5 to test their Bliss Eagle timing relays. (Sl-2 and S2-2 are the AC paered sequencers fed from "A" and "B" channels respectively). Had the need for FW-5 (Auxiliary Feedwater 4 | ||
Pumo) to be sequenced on arisen, the "A" channel prime signal sequencer Sl-1) would have performed the desired function. In additien, the "B" channel sequencer $2-1 (prime) woulc have sequencec on the redundant Auxiliary FW pumo (FW-10) had it been called upon to do so. | Pumo) to be sequenced on arisen, the "A" channel prime signal sequencer Sl-1) would have performed the desired function. In additien, the "B" channel sequencer $2-1 (prime) woulc have sequencec on the redundant Auxiliary FW pumo (FW-10) had it been called upon to do so. | ||
a 44 1s7 l | a 44 1s7 l | ||
l | l | ||
. . - - - . ~ . _ - , - . | . . - - - . ~ . _ - , - . | ||
LER No. 80-027 Omaha Public Power District Fort Calhoun Station Unit No.1 Cocket No. 05000285 Attachment No. 2 Corrective Action The Bliss Eagle timer in question was replaced with an identical scare which was, in turn, satisfactorily tested per ST-ESF-5 (F.1). | LER No. 80-027 Omaha Public Power District Fort Calhoun Station Unit No.1 Cocket No. 05000285 Attachment No. 2 Corrective Action The Bliss Eagle timer in question was replaced with an identical scare which was, in turn, satisfactorily tested per ST-ESF-5 (F.1). | ||
The A-C sequencer timers of sequencers Sl-2 and 52-2 will continue to be exercised and operability verified on a monthly basis per sur-veillance test ST-ESF-5. | The A-C sequencer timers of sequencers Sl-2 and 52-2 will continue to be exercised and operability verified on a monthly basis per sur-veillance test ST-ESF-5. | ||
/ | / | ||
.A/ | .A/ | ||
~ | ~ | ||
l, K; \ | l, K; \ | ||
l l | l l | ||
l l | l l | ||
:\ | :\ | ||
I LER No. 80-027 Omaha Public Power District Fort Calhoun Station Unit No.1 Docket No. 05000285 Attachment No. 3 Failure Data This is the eleventh failure of a Bliss Eagle Timer. Previous failures were reported per: | |||
I LER No. 80-027 Omaha Public Power District Fort Calhoun Station Unit No.1 Docket No. 05000285 Attachment No. 3 Failure Data | |||
This is the eleventh failure of a Bliss Eagle Timer. Previous failures were reported per: | |||
Abnormal Occurrence 75-1 Abnormal Occurrence 75-13 Abnormal Occurrence 75-16 LER 76-21 LER 77-9 LER 77-18 LER 77-25 LER 78-016 LER 78-027 LER 78-032 | Abnormal Occurrence 75-1 Abnormal Occurrence 75-13 Abnormal Occurrence 75-16 LER 76-21 LER 77-9 LER 77-18 LER 77-25 LER 78-016 LER 78-027 LER 78-032 | ||
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% m I' | % m I' | ||
_-}} | _-}} | ||
Revision as of 06:10, 31 January 2020
| ML19345A954 | |
| Person / Time | |
|---|---|
| Site: | Fort Calhoun  |
| Issue date: | 11/03/1980 |
| From: | Mueller R OMAHA PUBLIC POWER DISTRICT |
| To: | NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION IV) |
| Shared Package | |
| ML19345A949 | List: |
| References | |
| LER-80-027-03L, LER-80-27-3L, NUDOCS 8011250474 | |
| Download: ML19345A954 (4) | |
Text
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- - LICENSEE EVENT REPORT i
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4 (PLEASE P9 INT OR TYPE ALL REQUIRED INFORMATIONI 1011d il I N LaCENSEE I E ! FCOCE I C 15 I l l@l 0 !O !O to 10 10 10 in 10 l025l0 10 uCENSE NUM8ER 26 l@l L. CENSE a l TveE114011 il57 1l@l l
CAT 6d l@
15 00vT laiti ,T ,% I L l@l0151010101218 is '@l1 10 12 17 18 10 i@ll sd 69 (V ENT 3Afg 74 75 11DATE assCRT 101318IOl@ 30
- SQ 63 CCCK ET NvV9ga EVENT OESCRIPTtCN ANo PnC9ABLE CONSECUENCES h la 6 2i ! Ourino the cerformance of Surveillance Test ST-ESF-5. Section .1 (the monthlv 3C 1 taia!I secuencer timer testLtirer P4-6 ( Aux. P4 Pumo) on secuencer S1-2 f ailed to time out 1 1, i a i I within the crescribed limit. Durino the time of the failure, the DC secuencer cir- 1 I,i3i i cuitry which activates P4-6 as well as the AC and DC secuencer circuitrv actuatino i I
I a is 1 I the redundant Aux. Feedwater Puro (P4-10) were found to be coeratinc as desianed.
I 13 71 I I
} ) l3i I gg 7 ) 00MP. VAL %E SY ST!'.t OAUSE CAUSE CCOE ;OCE SLSCOCE COMPCNENT OOCE SUSCOCE 365COCE laint LS,lH l@ lE l@ l3 l@ l R l E I L i A i Y l 'aX l@ lM l@ lZ l@ d ;J
$ 3 'o et t: 13
- EV ' sic N 3ECU ENTI AL OCOURRENCE aE*CRT
= iVENT vea R 2E80RT NO. 000E "v'E NC.
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41 lNl@ lAl@ lEIOI?I0!@.
42 43 44 47 Auss cescRiaTicN ANC 00ARECTIVE ACTIONS @
i i ;! l The failure of the relav to time out within i ts crescribed limit was due to a stickv I iijl aceratinc mechanism. The Bliss Eacle timer was reolaced with 3 soare which was !
- i . , i testec satisfactorily for aceration cer ST-ESF-5 (F.1'). I i ! -1l l'iai 1 30 7 3 3 P actLITY > VETHCO CP ITATUS %PCWER OTHER STATU? CISCOV ERY OISCOVERY OESCRIPTtCN I i ii 5l I9E l@ l 'O01 7 ! S12l@l11 NA l lBj@l Surveillance test i 44 45 46 30 7
AC*1VITY CONTENT 4EL2ASED QP aELEASE AMOUNT OF AC*1VITV LOCATICN CP RELEASE l1 l 353l l Z l h l lihl UA ]
44 l
45 NA 30 l
s 13 11
- ERSONNEL EXPOSURES NuveEm *V8E O E SCRIPON l i l ,l l 0 l 010 !@l Z l@l JA l
' 13 30 5 7 11 12 8ER$CNNELiN;LR:E3 NUMBER OESCRIPTICN
{t j2 1 l01010 l@l NA 30
]
? 3 7 11 12 LOS3 CP OR 3 AMAGE *O F AC:LITV
'98E OESCRIPT'CN NA l l ' i )ls 3II l@l 7 10 30
- U 8 LICITV O
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53u ED OESCRiPTION
%. 11iiIllIii iilj j 1: ! :l i n l@lto NA !
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-s 'o 1 8 03 3 gggtl79xandy Mueller .vN E-NAvEespAEpAAss =*cNE: 102 126 1011 a
+1
)
LER No.80-027 4
Omaha Public Power District Fort Calhoun Station Unit No.1 Docket No. 0500028S
! Attacnment No. I
Safety Analysis i The Fort Calhoun Station Unit No.1 is so designed that no single j . failure can prevent the safe shutdown of the plant, if required. The
- failure of tt:e FW-6 timer relay associated with AC sequencer 51-2 would t
not have prevented the complete anc proper loading of essential safe-
- j. guards equipment should the need have arisen.
Prior to starting ST-ESF-5, prime signal sequencers Sl-1 and S2-1
. were operable and in auto standby. (Sl-1 and $2-1 are the DC powered
- sequencers fed from the "A" and "B" engineered safeguards channels re-spectively). The derived signal sequencers 51-2 and $2-2 were then separately bypassed as per ST-ESF-5 to test their Bliss Eagle timing relays. (Sl-2 and S2-2 are the AC paered sequencers fed from "A" and "B" channels respectively). Had the need for FW-5 (Auxiliary Feedwater 4
Pumo) to be sequenced on arisen, the "A" channel prime signal sequencer Sl-1) would have performed the desired function. In additien, the "B" channel sequencer $2-1 (prime) woulc have sequencec on the redundant Auxiliary FW pumo (FW-10) had it been called upon to do so.
a 44 1s7 l
l
. . - - - . ~ . _ - , - .
LER No.80-027 Omaha Public Power District Fort Calhoun Station Unit No.1 Cocket No. 05000285 Attachment No. 2 Corrective Action The Bliss Eagle timer in question was replaced with an identical scare which was, in turn, satisfactorily tested per ST-ESF-5 (F.1).
The A-C sequencer timers of sequencers Sl-2 and 52-2 will continue to be exercised and operability verified on a monthly basis per sur-veillance test ST-ESF-5.
/
.A/
~
l, K; \
l l
l l
- \
I LER No.80-027 Omaha Public Power District Fort Calhoun Station Unit No.1 Docket No. 05000285 Attachment No. 3 Failure Data This is the eleventh failure of a Bliss Eagle Timer. Previous failures were reported per:
Abnormal Occurrence 75-1 Abnormal Occurrence 75-13 Abnormal Occurrence 75-16 LER 76-21 LER 77-9 LER 77-18 LER 77-25 LER 78-016 LER 78-027 LER 78-032
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