ML20205S740
| ML20205S740 | |
| Person / Time | |
|---|---|
| Site: | Brunswick  |
| Issue date: | 05/28/1987 |
| From: | Bishop E CAROLINA POWER & LIGHT CO. |
| To: | |
| Shared Package | |
| ML20205K904 | List:
|
| References | |
| EOP-01-SRP-ISA, EOP-1-SRP-ISA, NUDOCS 8811110156 | |
| Download: ML20205S740 (8) | |
Text
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CAROLINA POWER & LIGHT COMPANY BRUNSWICK STEAM ELECTRIC PLANT UNIT 0 INSTRUMENT / SERVICE AIR SYSTEM RECOVERY EMERGENCY OPERATING PROCEDURE:
E0P P-ISA VOLUME VI Rev. 003 0
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Manat,er - t wrations Page 1 of 8 0011110106 00102D DR ADOCK ODOO 4
LIST OF EFFECTIVE PAGES E0P-01-SRP-ISA Page(s)
Revision 1-3 3
4 2
5-7 3
8 2
BSEP/Vol. VI/EOP-01-SRP-ISA Page 2 of 8 Rev. 3
A.
TITLE - Instrument / Service Air S:, stem Recovery B.
ENTRY CONDITION Af fected unit's air compressors are b'OT maintaining the instrument / service air header pressure above 100 psig.
C.
OPERATOR ACTIONS l.
ISOLATE the service air header from the RTGB, NOTE An operating unit should have at least one unloaded compressor BEFORE cross-tying air systems.
- wAAA******************************************************************
CAUTION Operation of the rotary screw air compresso'r, Air Compressor D in parallel I
with reciprocating air compressors for prolonged periods may damage the rotary screw compressor.
2.
OPEN Unit 1 And Unit 2 Cress-tie Valve, SA-V7.
l 3.
IF opening Unit 1 And Unit 2 Cross-tie Valve, SA-V7, adversely l
affects an operating unit. THEN CLOSE SA-V7.
4 IF instrunent air header pressure is below 100 psig or decreasing, THEN PERFORM the following steps:
a.
ISOLATE thi interruptible instrument air header.
b.
CLOSE or VERIFY CLOSED the following manual isolation valves to
~~
the RBCCW and TBCCW head tank keepfill stations.
(1) RCC-LV-662 Inlet Isolation Valve, RCC-V312.
~~
(2) TBCCW Head Tank Level Control Inlet I a.
' tion Valve, 2-FUD-V49.
5.
IF the ins *.runent air header pressure is still below 100 psig or decreasing, THEN PERFORM the following steps:
a.
START both Reactor building standby air compressors.
b.
CLOSE the following valves:
(1) Unit ! And Unit 2 Cross-tie Valve, SA-V7.
l (2) Noninterruptible Instrument Air Isolation Valves. IAN-V50
~~
and IAN-V51.
BSEP/Vol. VI/EOP-01-SRP-ISA Page 3 of 8 Rev. 3
i 6.
IF SERVICE AIR DRYER 3 TROUBLE (UA-01 5-1) alarm is sealed in THEN l
SHUT down the service air dryer.
(OP-46) 7.
IF the air compressors have lost electrical power, THEN PERFORM the following steps:
EXECUTE the "Auxiliary Electrical Power System Recovery a.
~~
Procedure" concurrently with this procedure.
b.
WHEN electrical power is-restored, THEN CONTINUE in Section 3 l
~~
on page 7 of this procedure.
8.
IF the air compressors were tripped due to loss of TBCCW, WHEN TBCCW is restored, THEN CONTINUE in Section 3 on page 7 of this procedure.
9.
IF the air compressors were running AND NOT maintaining system pressure. THEN CONTINUE in Section 1 on page 5 of this procedure.
l 10.
IF the air compress *>rs tripped AND will NOT start, THEN CONTIFUE in Section 2 on page 6 of this procedure, a
.JV 4
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BSEP/Vol. VI/EOP-01-SRP-ISA Page 4 of 8 Rev. 2
n Section 1 - Air compresaors were running AND NOT maintaining system pressure 1.
Locally CHECK CLOSED service and interruptible instrument air header isolation valves.
2.
IF any isolation valve is NOT' closed or is leaking by, THEN ISOLATE
~~
the manual valve in series with the affected valve.
3.
IF ann'inciator AIR DRYER. TROUBLE (UA-01 6-4) is in alarm AND instrument air dryer or filter high dP (5 psid filter, 7 paid dryer) is determined locally to be the cause of the ' alarm. THEN UNLOCK and OPEN Air Dryer No. 2 Bypass Valve, SA-V79.
j 4.,
CHECK air compressors locally for belt drive integrity and proper loading and unloading. NOTIFY maintenance if repairs are necessary.
5.
LOCATE and ISOLATE any source of leakage f rom the system, NOTIFY maintenance if repairs are necessary.
6.
WHEN the air compressors are able to maintaf.n system pressure, THEN CONTINUE in Section 3 on page 7 of this procedure.
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BSEP/Vol. VI/EOP-01-SRP-ISA Page 5 of 8 Rev. 3 1
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4 Section 2 - The air compressors are tripped AND will NOT start.
Electrical power is available.
1.
CHECK the breakers for air compressors that are tripped and RESET
~~
thermal or nagnetic trips as required.
NOTE Compressors A, B, and C trips High Jacket Water Temperature 130'F High Discharge Temperature 480'F Low 011 Pressure 15 psi 3 Motor Overload Compressor D trips Vent Fan Motor Overload High Intercooler Temperature 140'F Low 011 Pressure 20 psig High J1eed Off Pressure 4.3 psig Motor Overload 2.
DE1 ERMINE the cause of air compressor failure.
3.
NOTIFY maintenance to begin repairs as necessary.
4 WHEN air compressors can be started, THEN CONTINUE in Section 3 on
~~
page 7 of this procedure.
l l
l l
BSEP/Vol. VI/EOP-01-SRP-ISA Page 6 of 8 Rev. 3
Section 3 - Restoring the Instrument / Service Air System CAUTION Operation of the rotary screw air compressor, Air Compressor D, in parallel l
vith the reciprocating compressors for prolonged periods may damage the rotary screw compren-,r.
- 6***
- ht*******************
l.
START air compressors, as necessary, to maintain system pressure.
2.
WHEN the service air header can be maintained above 110 psig,
~~
THEN RESTORE the air systems to normal by performing the following steps as applicable:
a.
OPEN Noninterruptible Instrument Air Isolation Valves.
IAN-V50 and IAN-V5t.
b.
SECURE Reactor Building standby air compressors.
c.
RESTORE the IAI header as follows:
(1) CLOSE Inlet Isolation Valve To PV-722-1,
~~
IAI-V2.
(2) CLOSE or VERIFY CLOSED Inlet Isolation Valve To
~~
PV-722-2, IAI-V4 (3) RESET the instrument air isolation by depressing
~~
the isolation reset.
(CS-722)
(4) MOSITOR instrument air pressure and air compressor load while repressurizing the interruptible instrument air header to prevent loss of systen pressure through an unisolated break.
(5) SLOWLY THROTTLE OPEN Inlet Isolation Valve To
~~
PV-722-1, IAI-V2 (6)
IF service air pressure decreases to less than 110 psig, THEN CLOSE Inlet Isolation Valve To PV-722-1. IAI-V2, and INVESTIGATE the interruptible air system for leaks.
(7) WHEN the pressure across Inlet Isolation Valve
~~
To PV-722-1 IAI-V2, has equalized. THEN FULLY OPEN IAI-V2.
BSEP/Vol. VI/EOP-01-SRP-ISA Page 7 of 8 Rev. 3
E (8) RESTORE RBCCW and TBCCW keepfill stations.
d.
RESTORE the Service Air Header as follows:
(1) CLOSE Inlet Isolation Valve To SA-PV-706-1, SA-V8.
l (2) CLOSE Inlet Isolation Valve To SA-PV-706-2, SA-V10.
l (3) RESET the service air. isolation by depress'ing the service air isolation reset.
(CS-706)
(4) MONITOR service air pressure and air compressor loads
~
while repressurizing the service air header to prevent loss of system pressure through an unisolated break.
(5) SLOWLY THROTTLE OPEN Inlet Isolation Valve To
~
SA-PV-706-1, SA-V8.
(6)
IF service air pressure decreases to less than iTO psig, THEN CLOSE Inlet Isolation Valve To SA-PV-706-1. SA-V8, and Inlet Isolation Valve To SA-PV-706-2 SA-710.
(7) WHEN the pressure across SA-V8 has equalized, THEN
~
FULLY OPEN SA-V8 and SA-V10.
e.
RESTORE the instrument and service air dryers to normal
~
operation as soon as possible.
(OP-46) f.
RESTORE air compressors to normal system operational l
~
lineup as soon as possible.
(OP-46)
BSEP/Vol. VI/EOP-01-SRP-ISA Page 8 of 8 Rev. 2