ML20042G963
| ML20042G963 | |
| Person / Time | |
|---|---|
| Site: | Ginna  |
| Issue date: | 04/30/1990 |
| From: | Widay J ROCHESTER GAS & ELECTRIC CORP. |
| To: | |
| Shared Package | |
| ML20042G894 | List: |
| References | |
| ES-.3, ES-0.3, NUDOCS 9005160341 | |
| Download: ML20042G963 (17) | |
Text
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TiiLE '
REV::1 ES-0.3 NATURAL CIRCULATION ~COOLDOWN WITH STEAM
'f)t VOID IN VESSEL-PAGE 1 of 12 k.sJ
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TECHNICAL REVIEW Mf d!90 PORC REVIEW DATE
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'l e EFFECTIVE DATE L:
GINNA STATION t
START:
QA N = NON--QA CATEGORY 1.O DME TIME REVIEWED BY:
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TITLE:
pgy, y ES-0;3 NATURAL CIRCULATION COOLDOWN WITH STEAM f.; ' %
VOID IN VESSEL PAGE 2 of 12L
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A.
PURPOSE -
This-procedure provides actions to continue plant cooldown and
'j depressurization to cold shutdown, with no' accident in progress, under conditions that allow for the potential formation of a void in the. upper head region.
B.
SYMPTOMS AND OR ENTRY CONDITIONS j
1.
. ENTRY CONDITIONS - This procedure is entered'from:
l A)
ES-0. 2,_ NATURAL CIRCULATION COOLDOWN, after completing the j
'first 9 steps, if rapid cocidown or depressurization-is
.l required.
B)
ES-0.2, NATURAL CIRCULATION COOLDOWN, if depressurization L!
is-required which may result in upper head voiding.
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REV: 1 ES-0.3 NATURAL CIRCULATION COOLDOWN WITH STEAM VOID IN VESSEL PAGE 3 of 12 fy i
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L ACTION / EXPECTED RESPONSE RESPONSE NOT OBTAINED STEP i
4 ****************************************,
CAUTION o' IF SI ACTUATION OCCURS DURING THIS PROCEDURE, E-0, REACTOR TRIP OR SAFETY INJECTION,.SHOULD BE PERFORMED.
o THE FIRST 9 STEPS OF ES-0.2, NATURAL CIRCULATION C00LD0VN, SHOULD BE PERFORMED BEFORE CONTINUING VITH THIS PROCEDURE.
I EQIE:
o Foldout page should be open and monitored periodically.
o If conditions can be established for starting an RCP during this
- ~
procedure, then Step 1 should be repeated.
l Try To Start An RCP:
,m
- a. Check RVLIS indications
- a. Perform the following 5,')
o At least one train of RVLIS -
- 1) Increase PRZR level to 65%
AVAILABLE using charging and letdown.
o Level (no RCPs) - GREATER
- 2) Dump steam to establish THAN 95%
subcooling based on core exit T/Cs greater than 20*F using Figure MIN SUBC00 LING.
- b. Establish conditions for
- b. Go to Step 2.
I starting an RCP:
o Bus llA or llB energized o Refer to Attachment RCP START
,s
- c. Start one RCP
- d. Any RCP - RUNNING
- d. Go to Step 2.
1
- e. Go to 0-2.2, PLANT SHUTDOWN FROM HOT SHUTDOVN TO COLD CONDITION 4
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TITLE:
.pgy 1
.ES-0.3 NATURAL CIRCULATION COOLDOWN WITH STEAM 7f- '
VOID IN VESSEL PAGE 4 of 12
(
)
ACTION / EXPECTED RESPONSE RESPONSE NOT OBTAINED STEP v.
NOTE:
Saturated conditions in the PRZR should be established before trying l
to decrease PRZR level.-
- 2. Establish PRZR Level To -
Accommodate Void Growth:
r
- a. Check PRZR level - BETVEEN 20%
a.~ Control charging and letdown as AND 30%-
necessary,
- b. Place charging pump speed i
controllers in MANUAL:
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TITLE:
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-ES-0.3 NATURAL CIRCULATION COOLDOWN WITH STEAM
'RA VOID IN VESSEL' PAGE 5 of 12-Ay
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~ ACTION / EXPECTED RESPONSE RESPONSE NOT OBTAINED STEP
?
,Q*UTION I,
B6RON ADDITION TO ESTABLISH CSD CONCENTRATION SHOULD BE COMPLETE BEFORE DECREASINC RCS TEMPERATURE LESS THAN 500*F.
i
- -*l* * * * * * * * * * * * * * *
- p8'
@_IEs. RCS hot leg temperatures vill decrease af ter cooldovn is stopped due k
to decrease in loop delta Ts.
3 Decrease RCS Hot Leg j
,, '..,l.
Temperatures-To 500*F::
m3.
4
- a. Maintain cooldown rate in RCS y
cold legs - LESS THAN.50'F/HR e
L
- b. Maintain RCS pressure - AT l
,q
-1950 PSIG
/Q
- c. Maintain'RCS cold leg y
temperatures and pressure'-
P VITHIN LIMITS OF FIGURE NC C/D WITH VOID IN UPPER HEAD y-.
( d. Maintain stable ~PRZR level using charging
- e. Check RCS hot leg _tempetatures -
- e. Return to-Step 3a.
LESS THAN 500*F 1.
+
j
- f. Stop RCS cooldown
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TITLE EDPs:
REV:
1-ES-0;3 NATURAL CIRCULATION COOLDOWN:WITH STEAM VT
- VOID IN VESSEL PAGE 6-of~12 dj r
-t-g l ACTION /EXPECTi:D RESPONSE RESPONSE NOT OBTAINED STEP i
i
'4' Depressurize RCS To
, 1600 PSIG
~
1
- a. Check letdown - IN SERVICE
.c b._ Depre'ssurize. RCS _ using auxiliary spray valve _(A0V-296)--
- c. Check'RCS pressure
_LESS THAN
- c. Return to Step 4a.
1600 PSIG
}
'd._Stop RCS depressurization L
U 5 _ Continue RCS Cooldown And a
'3 Depressuriation:-
"[3-
- a. Maintain'cooldown rate in RCS
,O cold Iags
'LESS THAN 100*P/HR T
L A ' b' Mair.tain RCS pressure :- VITHIN' x!;
j LIMITS OF FIGURE NAT CIRC C/D l
VITH VOID IN UPPER HEAD:
i
- c. Check RCS temperature --GREATER
- c. Depressurize the RCS to less than 400 psig'and go to Step 8.
THAN 350*F
- d. Check letdown
.IN' SERVICE d.~ Depressurize RCS using olie PRZR PORV and go_to Step 6.
ll
- e. Depressurize RCS using auxiliary a
[L
' spray valve (A07-296) l1 m
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TITLE REV:
1-I VGID IN VESSEL
~
j ES-0.3
-NATURAL CIRCULATION COOLDOWN WITH. STEAM '
PAGE '7 of -- 12.
. f._
0 ACTION / EXPECTED RESPONSE RESPONSE NOT OBTAINED STEP f
+
6 ControlIPRZR Level:
' a. Level - GREATER'THAN 20%
- a. Control charging and letdown to increase PRZR level to greater than 20%.
- b. Level - LESS THAN 90%:
- b. Perform the following:
- 1) Turn on PRZR heaters to increase RCS pressure by 100 psi.
- 2) Decrease PRZR-level to less than 30% by one of the
-following:
o Control charging as
(-
necessary.
- ).~~; -
-OR-o Continue cooldown to shrink RCS inventory.
i
.7. Check RVLIS Indication:
.~a. At least one train of RVLIS -
- a. Go to Step 8.
J L
AVAILABLE
- b. Perform the following:
- GREATER THAN 95%
- 1) Repressurize RCS to maintain s
l RVLIS level greater than 95%.
1:
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- 2) Return to Step 5.
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REV:.-1 y ;~
- ES-0.3 NATURAL CIRCULATION COOLDOWN WITH STEAM
'i VOID IN VESSEL.
PAGE 8 of'12
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,,r ACTION / EXPECTED RESPONSE RESPONSE NOT OBTAINED STEP l
'8 Check If SI ACCUMs Should Be
, Isolated:_
- a. RCS pressure - LESS THAN
- a. Continue with Step 9.,
yJ E RCS
.i 1600 PSIG pressure is less than 1500 psig, L4M do Step 8b, e and 'd.
- b. Dispatch A0 with locked valve key to locally close breakers for SI ACCUM discharge-valves-i
(
- MOV-841, MCC C position 12F
- MOV-865, MCC D position 12C-
- c. Close SI ACCUM discharge valves
- c. Perform the following:
- ACCUM A, NOV-841
- 1) Dispatch personnel.to locally-
- ACCUM B, MOV-865
'close valves,~as necessary.
+
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dd
- 2) Maintain RCS pressure greater 4
than 1000 psig unti1~both-SI--
ACCUMs isolated.
o I_F any SI ACCUM can NOT be F
isolated.A @ RCS-depressurization to less.than 1000 psig is required,-TH,EE:'
l i
- 1) Open vent valves for unisolated SI ACCUMs.
- ACCUM A, A0V-834A
- ACCUM B, A0V-824B
- 2) Open HCV-945.
- 3) Maintain RCS pressure greater.
than SI ACCUM pressure.
d.: Locally open breakers for
- MOV-841-and MOV-865 l
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REV: 'l
- ES-0.3 NATURAL CIRCULATION COOLDOWN WITH STEAM VOID IN. VESSEL PAGE 9 of 12 O
' ACTION / EXPECTED RESPONSE RESPONSE NOT OBTAINED' STEP 9 Check If. SI System Normal
=
,' Shutdown' Alignment should Be Established:
- a. Verify the following:
- a. Do NQI lock out SI syr:em.
o RCS cold leg. temperatures -
Continue with Step 10. VHEN A
LESS THAN 350*F requirements met, THEN do Step 9b.
o RCS pressure - LESS THAN 1500 PSIG b.-Lock out.SI system as follows:
1)' Place all SI pump switches in
- PULL STOP
- 2) Locally close breakers for SI pump discharge valves to cold O
legs
- MOV-878D, MCC D position 8F
- 3) Close SI pump discharge to cold legs
- MOV-878B;
- MOV-878D
- 4) Locally open breakers for H0V-878B and MOV-878D 10 Maintain-Letdown Flow:
- a. Open letdown orifice isolation
-valves as.necessary
- b. Adjust. low pressure letdown pressure controller as necessary
is
'+-
EDP TITLE:
REV: 1 ES-0.3; NATURAL CIRCULATION COOLDOWN WITH STEAM A,
VOID IN VESSEL' PAGE 10 of 12
.;d s
1 ACTION / EXPECTED RESPONSE RESPONSE NOT OBTAINED STEP 11 Maintain. Required RCP Seal H RCP seal injection in service, x, Injection Flow And Labyrinth THEN perform the following:
Seal D/P:
o Adjust charging flow to REGEN Hx o Seal injection flov to each RCP (HCV-142) as necessary.
- GREATER THAN 6 GPM
-OR-o Labyrinth seal D/P to each RCP -
GREATER THAN 15 INCHES OF VATER o Dispatch AO to adjust seal injection needle _ valves if l
I necessary.
- RCP A, V-300A
,r~s.
(_
12 Check If RHR Normal Cooling Can Be Established:
- a. RCS cold leg temperature - LESS
- a. Return to Step 5.
THAN 350*F
- b. RCS pressure - LESS THAN
- b. Return to Step 5.
400 PSIG
- c. Place RCS overpressure '
- c. HF,RCS overpressure protection 4
protection system in service system can NOT be placed in (Refer to 0-7, ALIGNMEfiT AND service, THEN,_ consult Plant OPERATION OF THE REACTOR VESSEL staff to determine if RHR normal 0VERPRESSURE PROTECTION SYSTEM) cooling should be established and go to Step 13.
- d. Establish RHR normal cooling (Refer to Attachment RER COOL)
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E0P TITLE:
REV: 1 ES-O'.3
- NATURAL CIRCULATION COOLDOWN WITH STEAM 4
. VOID'IN VESSEL PAGE 11-of 12 j^p V-
. ACTION / EXPECTED RESPONSE RESPONSE NOT OBTAINED
}
-STEP t
131 Continue'RCS Cooldown To Cold
-Shutdown
- }
CAUTION
.l JDEPRESSURIZING THE RCS BEFORE THE ENTIRE RCS IS LESS THAN 200*F HAY RESULT IN
- ADDITIONAL _ VOID FORMATION IN THE RCS,
' 14L. Continue Cooldown Of Inactive Portion Of'.RCS:
- a. Cool upper head region using 1
< control rod shroud fans.
]
Y
.-b. Cool S/G U-tubes by dumping
- [b.
steam from all S/Gs
- c. Check RVLIS indicatloni
- 1) At least one-train'of RVLIS -
- 1) Go to Step 15.
.AVAILABLE
- 2) Level (no.RCPs)-- GREATER
-2) Return to Step 13.
THAN 95%
- i
/(
'Oi
)
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TITLE:
REV: -1 ES-0.3 NATURAL CIRCULATION COOLDOWN WITH STEAM
'N VOID IN VESSEL PAGE 12 of 12 fm Nj ACTION / EXPECTED RESPONSE RESPONSE NOT OBTAINED STEP r
- x CAUTION.
IF NO CONTROL R0D SHROUD PANS ARE RUNNING, THE UPPER HEAD REGION MAY REMAIN
-i'
. ABOVE 200*F FOR UP TO 29 HOURS AFTER REACHING CSD.
15 Determine If RCS Depressurization Is Permitted:-
- a. Check PRZR-level - LESS THAN 30%
- a. terform the following l
- 1) Turn on PRZR heaters to
~.
maintain PRZR pressure stable.
- 2) Decrease PRZR level to less than.30% by one of the jg.
-following:
fx.
o Control charging as necessary.
-OR-o Continue cooldovn to shrink RCS inventory.
- b. Entire RCS - LESS THAN 200*F
- b. Do EQI depressurize RCS. Return to Step 13.
- Core exit T/Cs
- Upper head T/Cs
- RCS hot leg temperature
- RCS cold leg temperature
- c. Check control rod shroud fan
- c. Consult Plant staff to determine status - BOTH RUNNING DURING valt period for upper head
^
C00LD0VN cooling.
.d. Refer to 0-2.3,~' PLANT AT COLD
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REVt 1 ES-0.3 NATURAL CIRCULATION COOLDOWN WITH STEAM VOID IN VESSEL PAGE 1 of 1
[%)
ES-0.3 APPENDIX LIST I
TITLE PAGES 1)
RED PATH
SUMMARY
1 2)
FIGURE MIN SUBCOOLING 1
l 3)
FIGURE NAT C/D WITH VOID IN UPPER HEAD 1
4)
ATTACHMENT RCP START 1
5)
ATTACHMENT RHR COOL 2
6)
FOLDOUT 1
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'i LOP liffLE' REV1 1 ES-0.3 NATURAL CIRCULATIOJ COOLDOWN WITH STEAM Js(.
VOID IN VESSEL PAGE 1 of 1 l
l RED PATil
SUMMARY
a.
SUBCRITICALITY - Nuclear power greater than 5%
b,.
CORE COOLING - Core exit T/Cs greater than 1200'F o
I
-OR-Core exit T/Cs greater than 700'F AH2 RVLIS level (no RCPs) less than 43% [46%
e L
adverse CNMT) r c.
HEAT SINK - Narrow range level in all S/Gs less than 5%
(25% adverse CNMT) AHH total feedwater flow less than 200 gpm d.
INTEGRITY - Cold leg temperatures decrease greater than 100'F in last 60 minutes flil RCS cold leg l
temperature less than 285'F CONTAINMENT - CNMT pressure greater than 60 psig e.
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ES-0.3 NATURAL CIRCULATION COOLDOWN WITH STEAM
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EDP ilfL(t REV' 1 i
ES-0.3 NATURAL CIRCULATION COOLDOWN WITH STEAM VOID IN VESSEL PAGE 1 of 1
',7 -s i-FOLDOUT PAGE 1.
RCP TRIP CRITERIA t
lE BOTH conditions listed below occur, IHEH trip both RCPs:
a.
SI pumps - AT LEAST TWO RUNNING b.
RCS pressure minus maximum S/G pressure - LESS THAN.175 psig 2.
SI PUMP AUTO SWITCHOVER CRITERION
(
WHEN BAST level decreases to 10%, IHER ensure SI pump automatic switchover to RWST.
3.
SI ACTUATION CRITERIA If EITHER condition listed below occurs, IHER actuate SI and go to E-0, REACTOR TRIP OR SAFETY INJECTION, Step 1.
o RCS subcooling based on core exit T/Cs - LESS THAN O'F USING
('Np REQUIREMENTS OF FIGURE MIN SUBCOOLING L.)
- OR -
o PRZR level - CHARGING CAN NOT CONTROL LEVEL GREATER THAN 5%
4.
AFW SUPPLY SWITCHOVER CRITERION JZ CST level decreases to less than 5 feet, IHER switch to elternate AFW water supply (Refer to ER-AFW.1, ALTERNATE WATER SUPPLY TO AFW PUMPS).
6 iV
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