ML20204H868
| ML20204H868 | |
| Person / Time | |
|---|---|
| Site: | Millstone, Haddam Neck, 05000000 |
| Issue date: | 07/03/1987 |
| From: | CONNECTICUT YANKEE ATOMIC POWER CO. |
| To: | |
| Shared Package | |
| ML20204H467 | List:
|
| References | |
| EOP-3.1-10, NUDOCS 8810240490 | |
| Download: ML20204H868 (12) | |
Text
. _ _ _ _ _ _ _.
aessee i new.e-et E0P 3.1-10 Rev. 10 (MAJOR)
E0P1 JUL 31987 peratNgProcedure E r en No. OP 3.1-10 Operations
-[ 4 g
[ g- [-
Pd'L., y O
PARTIAL LOSS OF AC APP si on svPgTte.org EPPECTIVE DAf t 1.0 O!SCUSSION 7 - b 8 '")
1.1 Partial loss of AC is defined as a loss of AC on Bus 1-8 and/or Bus 1-9.
This may occur with loss of AC on Bus 1-2 and/or Bus 1-3 with the subsequent re-energizing of either bus.
1.2 For those instances where both main 4160V buses (1-2 and 1-3) become de-energized and remain de-energized, refer to E-0, Reactor Trip or Safety Injection.
1.3 Power is normally supplied to the plant from two outside sources..
Relay systems are provided$o detect faults and initiate automatic switching to isglate the faulted section and maintain power to the plant.
p 1.4 Certain instances can occuI, however, when the automatic switc'11ng functions to isolate the fault but isolation fails to take place, or be completed in the allotted time period, thus resulting in the de-energizing of one of the two main 4160V busses and the respective associated 480V and emergency 4160V busses. Attention to these instances is directed in this procedure.
1.5 This procedure covers four potential configurations,for a partial loss of AC.
2.0 SYMPTOMS 2.1 4160V BUS 1-2 OR 1-3 REMAINS DE-ENERGIZED (PLANT TRIP OCCURS) 2.1.1 Low voltage indication on either 4160V bus 1-2 or 1-3, the respective 480V busses 4 and 5 or 6 and 7 and emergency 4160V busses 8 or 9.
2.1.2 Partial loss of plant lighting.
2.1.3 Rod drive M-G set breaker open alarm, r(
8810240490 881007 Page 1 of 12 POR ADOCM 05000213 P
pog L
E0P 3.1 10 Rev.10(MAJOR)
E0P1 JUL 3 587 2.1.4 Possible MCC-5 power supply transfer alarm.
2.1.5 Steam-feed flow mismatch alams.
2.1.6 Low feed pump suction and discharge pressure alams.
.1.7 Possible component cooling low flow alarm and auto start of standby pump.
2.1.8 Of esel generator auto start alam, diesel room annunciator alarm and auxiliary board alarm.
2.1.9 Possible charging header low pressure alarm and auto start l
of the stand by charging pump.
4.2. OFLAYE0 RE-ENERGIZING 0F BUS 1-2 OR 13 (PLANT TRIP 00ES NOT OCCUR)-
2.2.1 All listed under 2.1 above.
2.2.2 Voltage restored on, bus 1-2 or 1-3 and one or both emergency busses (1-8 or 1-9) are supplied by their associated diesel generator.
2.2.3 Feed flow-steam flow mismatch alams clear, if power less I
than 50% full power.
2.2.4 Low feed pump su for, and discharge pressure alams clear.
3.0 AUTOMATIC ACTION 3.1 Reactor and turbine trip resulting from steam-feed flow mismatch coincident with low steam generator level at power levels greater than r
50% will occur if power loss to bus 1-2 or 1-3 is not restored imediately by automatic switching.
3.2 Steam dump and feed flow actuation if trip occurs with T**9 greater than 545'F.
3.3 Generator separates from grid in approximately 52 seconds following trip; RCP busses transfer but only one (1) RCP remains in operation.
. - -L Page 2 of 12
E0P 3.1-10 Rev. 10 (MAJOR)
E 'I JUL 31987 3.4 Loss of voltage on the emergency bus will:
Action Bus 8 Bus 9 Start EG-2A EG-28 Trip LPS! pump P-92-8 P-92-A-Trip HPS! pump P-15-18 P-15-1A Trip Charging pump P-18-1B P-18-1A Trip ACB 2T8 3T9 Close AC8 4T5 6T7 Trip and block closing of ACB 4841 4971 Trip ACB 8T2 9T3 Block auto start of charging pump P-18-18 P-18-1A 3.5 Loss of voltage on the affected 480V busses will cause tripping of selected MCC and equipment, breakers.
4.0 Im EDIATE OPERATOR ACTION p
[
4.1 If a plant trip has occurr/d, perfom the imediate actions contained in E-0 Reactor Trip or Saf{ty Injection.
5.0 SUBSEQUENT OPERATOR ACf!ON Action / Expected Response Response Not Obtained 5.1 YERIFY POWER TO ONE AC EMERGENCY Restore power to one Emergency Bus.
BUS AND ASSOCIATED 480V BUSES If power to one Emergency Bus can not be restored go to ECA 0.0 o
Buses 8. 4 ant. 5 energized 5tep 1.
or o
Buses 9, 6 and 7 energized 5.2 VERIFY SERVICE WATER PUMP RUNNING Start one service water pump.
TO SUPPLY SERVICE WATER TO OPERATING O!ESEL GENERATOR 5.3 VERIFY CHARG!NG PUMP RUNNING ON Verify RCP lower bearing water UNAFFECTED BUS.
temperature less than 170'.
Start a charging pump.
Re-initiate seal injection.
w Page 3 of 12
E0P 301-10 Revo 10 (MAJOR) i E0P1 JUL 3 337 L
5.4 YERIFY COMPONENT COOLING WATER Start one Cow ane,t Cooling PUMP RUNNING.
Water Pump.
t 5.5 VERIFY DC SEAL 0!L PUMP AND TURBINE LUBE 0!L PUMP START IF REQUIRED.
5.6 TERMINATE ANY RADIDACTIVE OR CHEMICAL RELEASE IN PROGRESS.
5.7 VERIFY POWER TO BOTH EMERGENCY If Bus 1-2 and 1-3 energized, go BUSES AND ASSOCIATED 480V BUSES to Step 5.12.
If Bus 1-2 and 1-3 de-energized, t
o Buses 8, 4 and 5 energized go to Step 5.11.
[
and o
Buses 9. 6 and 7 energized 5.8 VERIFY BUS 1-2 AND 1-3 ENERGlZED Check the following MCB alarms:
FROM OFF $!TE POWER:
i o
115 Ky Line Fault o
ACB3891(12R-215-2)and L
ACB 3991 (12R-225-2) closed, o
Transfonner Lockout 369 P or BU o
AC8 2T3 open 399 P or SU f
o Normal Bus voltage on Bus 1-2 o
ACB 3891 or 3991 Overload Trip and 1-3.
jE Go to Step 5.10..
~
or l
o ACB3891(12R-2153-2)or I
ACB 3991 (12R-2253-2) closed.
o ACI 2T3 closed, o
Nonnel Bus voltage on Bus 1-2 and 1-3.
5.6 Operator action ti be followed if affected bus (1-2 or 1-3) is re energized and e,tesel generator starts and energizes Bus 1-8 or 1-9.
5.9.1 Verify diesel generator starts and re-energizes affected emergency 4160V and 480V busses. The reverse power, over current and loss of field trips are bypassed.
l l
5.9.1.1 If diesel generator failed to start or is not available for service, proceed to step 5.12.
5.9.2 Reset lockout relays on affected emergency bus if they have operated. They should be reset in the following order.
l I
l i
Page 4 of 12
- - _. - _ _ - _. - - _ _ _ _ _ - - - - _ - _ - - - - - -, _.. _ _~ _
E0P 3.1- 0 Rev. 10 MAJOR)
E0P1 UL 3 1987 f
5.9.2.1 86/1-8 or 86/1 9.
Marked reset first (1/8 is red, 1/9isyellow).
5.9.2.2 27i/1-8or27Y/1-9. Marked reset second (red or yellow).
5.9.2.3 4/EG2A or 4/EG28. Marked reset third (red or yellow).
5.9.3 Close affected tie breaker 2T8 or 3T9.
i I
5.9.4 Turn on synch switch 6ad adjust frequency and voltage to bring affected emergency bus into synchronism with the main 4160V bus.
NOTE:
Insure voltages are matches as closely as possible when phasing. Mismatched voltages can cause diesel getterator to pick up or shed load. Se j
prepared to adjust diesel load feediately after phasing.
5.9.5 C1cse affected tie breaker 8T2 or 9T3.
I 5.9.6 Reduce load on the diesel generator and open the generator breaker.
{
5.9.7 Close affected sgpply breaker 4841 or 4971 and open affected l
tie breaker 4T5 or 617.
l t
)
5.9.8 Set generator voltage at 4400Y and frequency at 61 Hertz.
Shut down diesel engine and place on standby.
5.9.9 Reset lockout relays on the 480V busses 27Y-4, 27Y-5, 27Y-6.
I 27Y-7, 27Y-48, 27Y-58, 27Y-68, and 27Y-75.
5.9.10 Restore station service distribution to nomat.
5.9.11 Rectosa feeder to 345 YD on affected BUS 1-2 or 1-3.
5.9.12 Notify the Duty Officer and file a Plant Infonnation Report as required by QA 1,2-16.1.
l 5.10 Operator action to be followed if bus 1-2 or 1-3 remain de-energized l
and diesel generator starts and energizes Bus 1-8 or 1-9, 5.10.1 Place control switches for all equipment on the affected 4160V (Bus 1-2 or Bus 1-3) and RCP busses in the trip-pullout position.
5.10.2 Place control switches for all auto starting equipecnt, not operating, in the trip-pullout position, r*(-
l Page 5 of 12 l
l
.-,n.
M 3W gop 3,1 1o Rev. 10 (MAJOR)
E0P1 A
MOTE:
o ACB 2T3 should automatically close on 115kv Line Fault N,
or Station Service Transfonner Fault.
If ACB 273 fails to close, check for Bus 1-2 or 1-3 overload prior to attempting to close ACB 2T3.
5.10 -
5 ACB 2T3.
(If 2T3 fatis to close, call Production
. 2T3 must be closed or offsite power must be restored the affected Bus 1-2 or 1-3 before continuing.)
5,10.4 deset lockout relays in the following order if they have operated:
5,10.4.1 Reset 86/1-8 or 66/1-9. Marked reset first (1/8 is red, 1/9 is yellow).
5.10.4.2 Reset 27Y/1-8 or 27Y/1-9. Marked reset second (redandyellow).
~
NOTE:
If operated, reset core cooling WL switches 4A and 48 in accordance with procedure.
5.10.4.3 If 4A and 48 are reset, reset 4/EG2A or 4/EG28.
Marked' reset third (red and yellow).
z-5.10.5 Close affected tie breaker 2T8 or 3T9.
5.10.6 Turn synch switc on and adjust frequency and voltage to bring affected emergency bus into synchronism with the main 4160V bus, and:ciose emergency bus tie breaker 872 or 9T3.
NOTE:
Insure voltages are matches as close?y as possible when phasing. Mismatched voltages can cause diesel generator to pick up or shed reactive load.
Be prepared to adjust diesel load imediately after phasing.
5.10.7 Reduce load on the diesel generator and open the generator breaker.
5.10.8 Close affected bus supply breaker 4841 or 4971 and open affected tie breakar 4T5 or 6T7.
5.10.9 Set.cenerator voltage at 4400V and frequency at 61 Hertz.
Shut down diesel engine and place on standby.
5.10.10 Reset the lockout relays on the affected 480V busses 27Y-4, 27Y-5, 27Y-6, 27Y-7, 27Y-48, 27Y-58, 27Y-68, 27Y-78, and restore distribution to normal.
.C i
Page 6 of 12 l
JUL 31987 E0P 301-10 Revo 10 (MAJOR)
E0P1 A
5.10.11 Monitor primary plant parameters and operate one or two RCPs '
q as necessary to maintain temperature.'
5.10.12 Contact CONVEX for infonnation as to the expected time for restoration of the normal power supply.
5.10.13 Notify the Duty Officer and file a Plant Infonnation Report as required by QA 1.2-16.1.
{
5.11 Operator action to be followed if affected Bus 1-2 or 1-3 de-energized i
and diesel generator failed to start or is not available for service.
5.11.1 Place control switches for all equipment on the affected 4160-vort and RCP busses in the trip-pullout position.
5.11.2 Place control switches for all auto-starting equipment, not i
~
operating, in the trip-pullout position.
i NOTE:
o AC8 2T3 should automatically close on 115kv Line Fault or Station Service Transformer Fault.
o If AC8 2T3 fails to close, check for Bus 1-2 or 1-3 overload prior to attempting to close AC8 2T3.
5.11.3 Close ACB 2T3.
(If 2T3 fails to close, call Production Test. 2T3 must bn closed or offsite power must be restored to the affected 2 or 1-3 Bus before contia.'ng.)
5.11.4 Use Attachment 4:to detennine Diesel Generator failure to start.
5.11.5 Trip (open) circuit breaker #5 in DC Cabinet EGG 2A (for bus 8) or EGG 2B (for bus 9).
t l
5.11.6 Reset the following lockout relays if they have operated.
[
5.11.6.1 86/1-8 or 86/1-9. Marked reset first (1/8 is red.
1/9 is yellow).
5.11.6.2 27Y/1-8 or 27Y/1-9. Marked reset second (red or yellow).
5.11.6.3 4/EG2A or 4/EG28. Market reset third (red or yellow).
5.11.6.4 Reset 27Y2/1-8 or 27Y2/1-9 by pressing the mechanical reset which protrudes through the i
"cover hold on screw".
5.11./
Close affected tie breaker 2T8 or 3T9.
l t
t Page 7 of 12 1
I
--._-.____v.~.__.
,-__..m-----.._
JUL 31987 E0P 3.1-10 Rev. 10 (MAJOR)
E0P1 5.11.d Turn synch switch on and close affected* tie breaker 8T2 or 9T3.
5.11.9 Close affected bus supply breaker 4841 or 4971 and open affected tie breaker 4T5 of 6T7.
5.11.10 Reset the lockout relays on the affected 480-volt busses 27Y-4, 27Y-5, 27Y-6, 27Y-7, 27Y-48, 27Y-58, 27Y-68, and 27Y-78 and restore distribution to noma 1.
Restart necessary equipment. Reclose 345KV yard supply breaker on affected bus 1-2 or 1-3.
5.11.11 Monitor primary plant parameters and operate one or two RCPs as necessary to maintain temperature.
5.11.12 If core cooling W1.s (4A and 48)* have operated they should be reset in accordance with procedure ES-1.1 SI Tamination.
5.11.13 When core cooling relays are reset, close circuit breaker #5 in DC Cabinet EGG 2A (for bus 8) or EGG 2B (for bus 9).
5.11.14 Contact CONVEX for infomation as to the expected time for restoration of the nomal power supply.
Notify the Outy 0$fficer and file a Plant Infonnation Report 5.11.15 as required by QA.1.2-16.1 5.12 Operator action to be foll ed if affected Bus 1-2 or 1-3 re-energized and diesel generato'r failed to start or is not available for service.
5.12.1 Open circuit b'reaker f5 in DC control panel EGG 2A (for bus 8) or EGG 2B (for bus 9).
5.12.2 Reset the following lockout relays if they are operated:
5.12.2.1 86/1-8 or 86/1-9. Marked reset first (1/8 is red, 1/9 is yellow).
5.12.2.2 27Y/1-8 or 27Y/1-9. Marked reset second (red or yellow).
5.12.2.3 4/EG2A or 4/EG28. Marked reset third (red or yellow).
5.12.2.4 Reset 27Y2/1-8 or 27Y2/1-9 by pressing the mechanical reset which protrudes through the "cover hold on screw".
l 5.12.3 Close affected tie breaker 278 or 379.
5.12.4 Turn on synch switch and close affected tie breaker BT2 or 9T3.
l l
l l
Page 8 of 12
E0P 3.1-10 Rev. 10 (MAJOR)
E0P1
~
5.12.5 Close circuit breaker f5 in DC control cabinet EGG 2A (for bus 8) or EGG 2B (for bus 9).
5.12.6 Close affe:ted supply breaker 4841 or 4971 and open affected tie breaker 4T5 or 6T7.
5.12.7 Reset lockout relays on the 480 volt busses 27Y-4, 27Y-5, 27Y-6, 27Y-7, 27Y-48, 27Y-58, 27Y-68, and 27Y-7B.
5.12.8 Use Attachment A to determine Ofesel Generator failure to start.
5.12.9 Restore station service distribution to nonnal.
5.12.10 Reclose feeder supplying 345KV switchyard on affected bus 1-2 orl-3.
5.12.11 Notify the Duty Officer and file a Plant Information Report as required by ACP 1.2-6.1.
5.13 Operator action to be taken on loss of AC while in modes 5 or 6.
5.13.1 If offsite power.is regained, refer to step 5.16 (Restoration) of.ithis procedure.
t 5.13.Z If offsite powenis not regained, continue to step 5.15 of thisprocedure,j 5.14 Verify following equipmertIis operating in modes 5 or 6.
a.
Containment and Fuel Building radiation monitors.
b.
Neutron flux monitor (source range).
c.
Fire suppression system'- note: the fire suppression water system is automatically operable only if the diesel operated fire pump is operable, d.
Seismic monitor.
e.
Fire detection system.
f.
Radioactive liquid and gaseous monitors.
g.
Liquid level detectors (flood protection).
~
h.
Control air compressors and air dryers.
5.15 Verify power source (s) available and operate equipment as necessary.
f O
Page 9 of 12
JUL 31987 E0P 3.1-10 Rev. 10 (MAJOR)
E0P1
("'N One RHR loop (including support services such as the component a.
s cooling water system and the service water system) (operating).
b.
Other RHR loop operable (standby).
c.
One charging pump and associated valves to inject borated water (standby).
d.
Containment Air Recirculation system (standby).
NOTE:
There are no specific requirements for the CAR fans in these modes.
5.16 Restore power to the indicated Motor Control Centers and operate equipment as necessary.
a.
Meteorological Monitors (NCC 6-6 compt. 3FNL).
NOTE:
Backed up by EG-28 only.
b.
Battery Charger IB (MCC 6-6 compt. 3FHR).
c.
Data System UPS battery charger (MCC 6-6 compt. 3FHL).
d.
Control Room Ventilation System, i
1-Fan AC-3-1A (NCC6-6 compt. 3ROL).
2.
Compressor C-11-IA (MCC 6-6 compt. 3ROR).
t e.
Purification system;
- 1.
Purification Pump P-12-1A (MCC 8-6 compt.1RK).
f.
Spent Fuel Pool Cooling System.
1.
Pump P-21-1A (MCC 2-4 compt. 1M).
2.
Pump P-21-18 (MCC 2-5 compt. 3K).
g.
Service Air.
1.
C-2-1A (Bus 5 compt. 6A).
2.
C-2-1B (Bus 7 compt. 17A).
h.
Fuel Building Ventilation / Cleanup System.
1.
Spent Fuel Pit Exhaust Fan F-16-1A (MCC 8-6 compt. IFK).
1.
PAB Ventilation / Containment Filtered Purge System.
1.
Vent and Purge Fan F-50-1A (Bus 5 compt. 98).
2.
Vent and Purge Fan F-50-1B (Bus 6 compt. 12A).
L Page 10 of 12
E0P 3.1-10 Rev. 10 (MAJOR)
E0P1 j.
Electric Fire Pump P-4-1A (Bus 4 compt. 20) 5.16.1 If a loss of offsite power occurs during fuel movement power must be returned to MCC7 and MCC2 so any fuel being moved by either the Fuel Manipulator Crane (MCC7) or the Fuel Building Crane (MCC2) can be stored either as per the fuel movement procedure, or as per E0P 3.1-48, Cavity Seal Failure (if a loss of cavity seal is being experienced).
Restore' Power to:
a.
Fuel Building Manipulator Crane.
1.
Spent fuel Handling Car (NCC 2-4 compt. 2FL).
2.
Cranes CR-5-1A, CR-5-18 (NCC 2-4 compt. 2BL).
3.
Lighting Panel (MCC 2-5. compt. 3DR).
b.
Fuel Manipulator Crane.
1.
CR-4-1A(MCC7-7 compt.40R).
2.
Lighting Panel (MCC 7-6 compt. 30C).
ik P
J E N
l[
.T
~
(
Page 11 of 12
M 3g E0p 3.1 10 Rev. 10 (MAJOR)
E0P1
/7 ATTACHMENT A IF DIESEL GENERATOR FAILS TO START:
1.
VERIFY EXCITATION PANEL AND DC POWER PANEL BREAKERS CLOSED.
2.
ENGINE CONTROL PANEL OVERSPEED TRIP ALARM a.
Reset overspeed trip lever 3.
ENGINE CONTROL PANEL START FAILURE ALARM a.
Check EDG Air System b.
Check EDG Fuel Oil System c.
Press Normal Shutdown Push buttons and Alann Reset 4.
DIESEL AUXILIARY BOARD REVERSE POWER O'R OVERCURRENT TRIP ALARM a.
Reset 86 lockout b.y taking ACB EG2A (EG28) Breaker Control Switch on Diesel Auxilia.s Board to Trip position.
5.
DIESEL AUXILIARY BOARD LOSS OF FIELD ALARM a.
Check Exciter Field Breaker closed in EG Excitation Cabinet.
b.
Check Field Flash Breaker shut in EG DC Distribution Panel, c.
Press Nonnal Shutdown Push buttons and Alarm Reset.
6.
DIESEL AUXILIARY BOARD EMERGENCY STOP/ TRIP ALARM a.
Check lube oil level and oil lines intact.
b.
Press Emergency Stop Reset.
7.
EG DIFFERENTIAL RELAY MCB RM a.
CTose Exciter Field Bieaker in EG Excitation Cabinet.
b.
Reset 87X WL on EG Breaker Cubicle.
NOTE:
o IF AtJTO START SIGNAL PRESENT EG WILL AUTO START.
l l
1-Page 12 of 12 I
i