ML030800604
| ML030800604 | |
| Person / Time | |
|---|---|
| Site: | Point Beach  |
| Issue date: | 11/25/2002 |
| From: | - No Known Affiliation |
| To: | Office of Nuclear Reactor Regulation |
| References | |
| FOIA/PA-2003-0094 | |
| Download: ML030800604 (4) | |
Text
Power Supplies and Failure Modes foi Auxiliary Feedwater System Electrical Components 1AA Undervoltage Low Suction Pressure Low Suction Pressure Trin Sin Device Number Power Control Power Auto Start 10nen/Close
$S (Safeguards Sequence)
Low-Low Level Signal Power Signal Power Trip Circuit Power Transmitter Loop Power Notes IP-29 IMS-2019 D-I I D-11 N/A N/A D-16, D-I 1 N/A N/A Opens on AMSAC, IAO0 and IA02 undervoltage, or low-low level NC - FAI
[DOl]
[DOl]
[DOI]
[DOl]
in both Unit I SGs. IY-06: Unit I AMSAC signal will not open B SG Supply B SG B SG LL Level Only D-27 valve. IY-06 is an acceptable power supply for the AMSAC signal
[bistables fail safe]
[D021 since AMSAC is not a safety related trip function. Fails AS IS.
UV Only IMS-2020 D-27 D-27 NIA N/A D-21 D-I 1 N/A N/A Opens on AMSAC, IAO1 and IA02 undervoltage, or low-low level NC - FAI
[D02]
[D02]
[D02]'
[DOI]
in both Unit I SGs IY-06: Unit I AMSAC signal will not open A SG Supply A SG A SG LL Level Only D-27 valve. IY-06 is an acceptable power supply for the AMSAC signal
[bistables fail safe]
[D02]
since AMSAC is not a safety related trip function. Fails AS IS.
UV Only IMS-2082 D-1 ID-1Il N/A N/A N/A N/A D-I1 IY-03 NO-FAI
[DOI]
[DOI]
[DOI]
[D031 Trip Throttle None None IFP-29 Seismic Only IP-29 Seismic Only IAF-4000 D-27 D-27 N/A N/A N/A N/A N/A N/A NT - FAI
[D02]
[D02]
B SG Feed I P-29 with Faulted B I P-29 with Faulted B IAF-4001 D-1II D-1 I NIA N/A N/A N/A N/A N/A NT-FAI
[DOI]
[DOl]
A SG Feed IP-29 with Faulted A IP-29 with Faulted A IAF-4002 N/A D-1 IY-06 (IDPIS-4002)
N/A N/A N/A N/A N/A Normally closed. Opens on IMS-2019 or IMS-2020 opening.
NC-FC
[DOI
[11B03]
Closes via IDPIS-4002 after flow has been established. Fails closed.
Recire I-P29 IP-29 IAF-4006 I B-42 I B-42 N/A N/A N/A N/A N/A N/A Normally closed. Manually opened by operators to switch to SW NC-FAI none none after a low suction pressure trip. Fails AS IS.
SW Supply 1FI-4002 N/A IY-01 (IFQ-4002)
N/A N/A N/A N/A N/A N/A IP-29 Forward
[DO I]
Flow Indicator Loss of Indication P-38A P-38A IB-03 D-I D-17 D-16 UI D-16 UI N/A D-17 IY-103 Normally not running. Starts on St (safeguards sequence), AMSAC, P-38A
[DOl]
[DOI]
[DOI]
[DOl]
[DOl]
[D03]
or low-low level in one SG. IY-06 and 2Y-06: Unit I orUnit2 P-38A P-38A Safeguards Only U!
LL Level Only UI P-38A Seismic Only P-38A Seismic Only AMSAC will not start pump. IY-06 and 2Y-06 are acceptable
[bistables fail safe]
power supplies for the AMSAC signals since AMSAC is not a safety D-22 U2 related start function.
[DOI]
D-22 U2 Safeguards Only U2
[DOI]
LL Level Only' U2
[bistables fail safe]
AF-4007 N/A D-II IYO6 (DPIS-4007)
N/A N/A N/A N/A N/A NC-FC
[DOl]
[IB03]
Recirc P-38A P-38A AF-4012 N/A IY-O1 N/A N/A N/A N/A N/A N/A NC-FO
[DOI]
Flow Cont;l'-.
_P-38A (runnout)
AF-4022 2B-32 2B-32 D-17 D-22 U2 D-22 U2 N/A N/A N/A
- -*. l*,,qr,.*..v_=_
},P35AU2
-- P.3'U pDioi
[DIll -
-r-,tv-.
NC-FAI
.1 P-38A U2 Safeguards Only U2 LL Level Only U2
[bistables fail Ife]
AF-4023 IB-32 IB-32 D-17 D-16 Ul D-16 UI N/A N/A N/A U1 A SGFeed P-38A Ul P-38A Ul
[DOl]
[DOI]
[DOI]
NC - FAI
/
P-38A UI Safeguards Only UI LL Level Only U!
[bistables fail,afe]
AF-4009 I1B-32 1B-32 N/A N/A N/A N/A N/A N/A NC - FAI none none SW Supply FI-4007 N/A IY-02 (FQ-4007)
N/A N/A N/A N/A N/A N/A P-38A Forward
[D02]
Flow Indicator Loss of Indication IFI-4036 N/A IY-03 (I FQ-4036)
N/A N/A N/A N/A N$A N/A Ul A SG Total
[D03]
Flow Indicator Loss of Indication 2FI-4036 N/A 2Y-03 (2FQ-4036)
N/A N/A N/A N/A N/A N/A U2 A SG Total
[D03]
Flow Indicator ILoss ofIndication 11/25/2002 4g Page I of 4
Power Supplies and Failure Modes for Auxiliary Feedwater System Electrical Components Undervolta"e Low Suction Pressure Low Suction Pressure Trip Puma Device Number Power Control Power Auto Start or Open/Close SI (Safeguards Sequence)
Low-Low Level Signal Power Signal Power Trip Circuit Power Transmitter Loop Power Notes P-38-B P-38B 2B-04 D-13 D-19 D-21 UI D-21 Ul N/A D-19 2Y-104 Normally not running. Starts on SI (safeguards sequence), AMSAC, P-38B
[D02]
[D021
[D02]
[D02]
[3I02]
[D04]
or low-low level in one SGIY-06 and 2Y-06: Unit!I or Unit2 P-38B P-38B Safeguards Only UI LL Level Only UI P-38B Seismic Only P-38B Seismic Only AMSAC will not start pump. IY-06 and 2Y-06 are acceptable
[bistables fail safe]
power supplies for the AMSAC signals since AMSAC is not a safety D-18 U2 related start function. 2Y-104: Pump will not trip on low suction
[D02]
D-19 U2 pressure.
Safeguards Only U2
[D02]
LL Level Only U2
[bistables fail safe]
AF.4014 N/A D-13 2Y06 (DPIS-4014)
N/A N/A N/A N/A N/A NC-FC
[D02]
[2B041 Recirc P-38B P-38B AF-4019 N/A 2Y-02 NIA N/A N/A N/A N/A N/A NC-FO
[D021 Flow Control P-38B (runnout)
AF-4020 2B-42 2B-42 D-19 D-18 U2 D-18 U2 N/A N/A N/A NC - FAT P-38B U2 P-38B U2
[D02]
[D02]
[D02]
U2 B SG Feed P-38B Safeguards Only U2 LL Level Only U2
[bistables fail safe]
AF-4021" IB-42 IB-42 D-19 D-21 UI D-21 UI N/A N/A N/A NC - FAT P-38B UI P-38B 01
[D02 1I)02]
[D021 Ul B SG Feed P-38B Safeguards Only U2 LL Level Only UI AF4016__213142_
_bistables fail safe]
AF-4016 23-42 213-42 N/A N/A NIA N/A NIA N/A NEED TO VERIFY THAT SEISMIC DOES NOT REQUIRE NC-FAT none none CONTROL ROOM OPERATION SW Supply C
OPR FI-4014 N/A 2Y-02 (FQ-4014)
N/A N/A N/A N/A N/A N/A P-38B Forward
[D021 Flow Indicator Loss of Indication 1FI-4037 N/A IY-04 (IFQ-4037)
N/A N/A N/A N/A N/A N/A U1 B3SG Total
[D04]
I_
Flow Indicator Loss of Indication 2FI-4037 NIA 2Y-04 (2FQ-4037)
N/A N/A N/A N/A N/A N/A U2 B SG Total
[1304l Flow Indicator Loss of Indication 2P-29 2MS-2019 D3-12 D-12 "N/A N/A D-22 D-12 N/A N/A Normally closed. Opens on AMSAC, 2AO1 and 2A02 undervoltage, NC - FAT
[DOl]
[DO1]
[D01]
[DO1]
or low-low level in both Unit 2 SGs 2Y-06: Unit 2 AMSAC signal B SG Supply B SG B SG LL Level Only 3D-13 will not open valve. 2Y-06 is an acceptable power supply for the
[bistables fail safe]
[D02]
AMSAC signal since AMSAC is not a safety related trip function.
_UV Only Fails AS IS.
C2M-2020 AO-13 3D-13 N/A N/A 13-18 D-12 N/A N/A Normally closed. Opens on AMSAC, 2A01 and 2A02 undervoltage, NC -PAl
[1302]
[13021
[DO02]
[i130]
or low-low level in both Unit 2 SGs. 2Y-06: Unit 2 AMSAC signal A SG Supply A SG A SG LL Level Only D-13 or...
.. *ihi nor open valve. :-Y'-61sianacceplable power suppl) for the 1-.tLwl't fi.! safe) -
002)
AMSAC signal since AMSAC is not a safety related trip function.
S.
U V O n l y F a i l s A S I S.
NO - FAT D-13 D-13 N/A N/A N/A N/A D-13 2Y-04 NO-FAt
[D02]
[1021
[3D021
[D04]
Trip Throttle none none 2P-29 Seismic Only 2P-29 Seismic Only 2AF-4000 D-13 D-13 N/A N/A N/A N/A N/A N/A NT-FAT
[D021
[D021 B SG Feed 2P-29 with Faulted B 2P-29 with Faulted B 2AF-4001 D-12 D-12 N/A N/A N/A N/A N/A N/A NT-PFAI
[D01]
[1)01]N/
A SG FEED 2P-29 with Faulted A 2
_______h-Fa__ted 2AF--4002 N/A D-12 2Y-06 (2DPIS-4002)
N/A N/A N/A NIA N/A Normally closed. Opens on 2MS-2019 or 2MS-2020 openng.
(D" OI1]
[213041 Closes via 2DPIS-4002 after flow has been established.Falcosd N C -P
[
1 01C2 3 4 Reciro 2P-29
"- -2n42 N/ANA N/A N/A Normally closed. Manually opened (remotely or locally) by NC -
Al none none operators to switch to SW after a low suction ressure t SW Supply
___________S 2FI-4002 N/A 2Y-Ol (2FQ-4002)
NIA NIA N/A N/A N/A NIA 2P-29 Forward
[DO01]
FowIdiatlow________IndosifIniatonator___________I____Loss______
___of_______Indication____
11/25/2002 Page 2 of 4
Power Supplies and Failure Modes for Auxiliary Feedwater System Electrical Components The following is a summary of equipment lost during various single failures and the consequences of that equipment being lost:
D-O01 D-02 D-03 D-04 I B-03 AND 2B-03 IlB-04 AND 2B-04 NNSR (IY-06/2Y-06)
NOTES IMS-2019 B
P D-01: Loss of valve power and all auto open signals.
D-02: Loss of UV open signal only.
IMS-2020 P
A D-01: Loss of UV open signal only.
D-02: Loss of valve power and all auto open signals.
IMS-2082 XS XS D-01: Loss of valve power and low suction pressure trip.
D-03: Loss of low suction pressure trip.
IAF-4000 lXB D-02: Loss of valve power. Valve normally throttled open but cannot be remotely isolated.
IAF.4001 IXA D-01: Loss of valve power. Valve normally throttled open but cannot be remotely isolated.
IAF-4002 X
X D-01: Loss of valve power.
IY-06: Loss of auto open/close signal from IDPIS-4002.
IAF-4006 XS IB-04 (and 213-04): Loss of valve power.
1FI-4002 I
D-01: Loss of indication. Flow indication still available from FI-4007, FI-4014, IFI-4036 and IFI-4037.
P-38A X
XS X
IB03 (and 2B03): Loss of motor power.
D-01: Loss of breaker control power, all auto start functions and low suction pressure trip.
D-03: Loss of low suction pressure trip.
AF-4007 X
X D-01: Loss of valve power.
AF-4012___X__
IY-06: Loss of auto open/close signal from DPIS-4007.
AF.4012 x
_D-01:
Loss of valve power.
AF-4022 2X 2X 2B-03 (and IB-03): Loss of valve power.
D-01: Loss of all auto open/close signals.
AF-4023 IX IX IB-03 (and 2B-03): Loss of valve power.
I D-0I: Loss of all auto open/close signals.
AF-4009 XS I1B-03 (and 2B-03): Loss of valve power.
FI-4007 I
D-02: Loss of indication. Flow indication still available from IFI-4002, 2FI-4002, lFI-4036 and 2FI-4036.
IFI-4036 I
__D-03:
Loss of indication. Flow indication still available from IFI-4002 and FI-4007.
2FI-4036 I
D-03: Loss of indication. Flow indication still available from 2FI-4002 and FI-4007.
W~
P-38B x
xSx 21303 (and 1B03): Loss of motor power.
D-02: Loss of breaker control power, all auto start functions and low suction pressure trip.
D-04: Loss of low suction pressure trip.
AF-4014 X
X D-02: Loss of valve power.
2Y-06: Loss of auto open/close signal from DPIS-4014.
AF-4019 X
_D-02:
Loss of valve power.
AF-4020 2X 2X 2B-04 (and IB-04): Loss of valve power.
AF4021_IxI
___D-02:
Loss of all auto open/close signals.
FXIB-04 (and 213-04): Loss of valve power.
________________D-02:
Loss of all auto open/close signals.
AF-4016 at.;....-XS 213-04 (and !B
-.0 3S.--ofva-.owcr-...
A146014 I
D-02: Loss of indication. Flow indication still available from IFI-4002, 2FI-4002, 1FI-4037 and 2F1-4037.
IFI-4037 I
D-04: Loss of indication. Flow indication still available from IFI-4002 and FI-4014.
2FI-4037--I D-04: Loss of indication. Flow indication still available from 2FI-4002 and FI-4014.
2MS-2019 B
P D-01: Loss of valve power and all auto open signals.
D-02: Loss of UV open signal only.
2MS-2020 P
A D-O1: Loss of UV open signal only.
D-02: Loss of valve power and all auto open signals.
"2MS-2082 xS xS D-02: Loss of valve power and low suction pressure trip.
D-04: Loss of low suction pressure trip.
2AF-4000 2XB D-02: Loss of valve power. Valvetnormally throttled open but cannot be remotely isolated.
2AF-4001 2XA D-0 I: Loss of valve power. Valve normally throttled open but cannot be remotely isolated.
2AF-4002 X
X D-01: Loss of valve power.
2Y-06: Loss of auto open/close signal from 2DPIS-4002.
2AF-4006 xS 213-04 (and IB-04): Loss of valve power.
2FI-4002 I
___GID-01:
Loss of indication. Flow indication still available from FI-4007, FI-4014, 2FT-4036 and 2FI-4037.
Page 3 of 4, 11/25/2002
Power Supplies and Failure Modes for Auxiliary Feedwater System Electrical Components X
Pump lost.
XS Pump lost for seismic event only.
IXA Pump lost with faulted Unit I "A" steam generator.
lXB Pump lost with faulted Unit I "B" steam generator.
2XA Pump lost with faulted Unit 2 "A" steam generator.
2XB Pump lost with faulted Unit 2 "B" steam generator.
1x Pump lost to Unit I only.
2X Pump lost to Ui ny P
Only partial loss of pump function (see notes).
A Loss of A-train steam supply to pump. Pump still operable from B-train steam supply.
B Loss of B-train steam supply to pump. Pump still operable from A-train steam supply.
I Partial loss of flow indication (see notes).
Ii Page 4 ofn 11/25/2002 I