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) | |
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. . REV::1 ES-0.3 NATURAL CIRCULATION ~COOLDOWN WITH STEAM VOID IN VESSEL- PAGE 1 of 12 i;
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' ROCHESTER GAS AND ELECTRIC CORPORATION: [
-r GINNA STATION CONTROLLED COPY NUMBER N ^
TECHNICAL REVIEW PORC REVIEW DATE Mf d!90
\nl di i)dL
/,,') PLANT SUPERINTENDENT y)
~4 [k 'l e EFFECTIVE DATE ,
L: , GINNA STATION ,
t START:
QA N = NON--QA CATEGORY 1.O DME REVIEWED BY:
TIME .
\ COMPLETED:
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... E0Pa. TITLE: pgy, y ES-0;3 NATURAL CIRCULATION COOLDOWN WITH STEAM f.;:( ' %
, VOID IN VESSEL PAGE 2 of 12L Q]~ \
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 fy VOID IN VESSEL PAGE 3 of 12 i a k,/ -
L - STEP -
ACTION / EXPECTED RESPONSE RESPONSE NOT OBTAINED 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
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'p- E0P - TITLE: .pgy 1
.ES-0.3 NATURAL CIRCULATION COOLDOWN WITH STEAM I 7f- ' VOID IN VESSEL PAGE 4 of 12 )
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STEP - ACTION / EXPECTED RESPONSE RESPONSE NOT OBTAINED 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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' g,h E0P: TITLE: pgy .y- .
, / 4, -ES-0.3 NATURAL CIRCULATION COOLDOWN WITH STEAM
'RA VOID IN VESSEL' PAGE 5 of 12-A y
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- STEP -
~ ACTION / EXPECTED RESPONSE RESPONSE NOT OBTAINED
?
,Q*UTION I, B6RON ADDITION TO ESTABLISH CSD CONCENTRATION SHOULD BE COMPLETE BEFORE '
$: DECREASINC RCS TEMPERATURE LESS THAN 500*F.
i
- * * * * * * * * * * * * * * * * * * * * * * *-*l* * * * * * * * * * * * * * * * ,
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@_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.
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Temperatures-To 500*F::
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
( d. Maintain stable ~PRZR level using y-. 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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<&: EDPs: TITLE
. REV: 1-ES-0;3 NATURAL CIRCULATION COOLDOWN:WITH STEAM VT : VOID IN VESSEL PAGE 6-of~12 ;
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- STEP -
l ACTION /EXPECTi:D RESPONSE RESPONSE NOT OBTAINED i i
'4' Depressurize RCS To l
, 1600 PSIG l
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.c b._ Depre'ssurize. RCS _ using auxiliary spray valve _(A0V-296)--
- c. Check'RCS pressure _LESS THAN c. Return to Step 4a.
1600 PSIG
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'd._Stop RCS depressurization L
a U
'3 5 _ Continue RCS Cooldown And Depressuriation:-
"[3- a. Maintain'cooldown rate in RCS
,O T cold Iags 'LESS THAN 100*P/HR '
L A ' b' Mair.tain RCS pressure :- VITHIN'
. x!;
j LIMITS OF FIGURE NAT CIRC C/D l VITH VOID IN UPPER HEAD: ,
i
THAN 350*F
ll e. Depressurize RCS using auxiliary a '
[L ' spray valve (A07-296) l1 m
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- lR E0P: TITLE REV: 1-I ES-0.3 -NATURAL CIRCULATION COOLDOWN WITH. STEAM ' ~
j
.,. . f._ VGID IN VESSEL PAGE '7 of -- 12. ,
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ACTION / EXPECTED RESPONSE RESPONSE NOT OBTAINED STEP
+ -
6 ControlIPRZR Level:
- a. Control charging and letdown to
' a. Level - GREATER'THAN 20%
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 ,
- GREATER THAN 95%
- 1) Repressurize RCS to maintain !
s l
RVLIS level greater than 95%. '
1:
- 2) Return to Step 5. !
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REV:.-1 y ;~ - ES-0.3 NATURAL CIRCULATION COOLDOWN WITH STEAM 'i
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VOID IN VESSEL. PAGE 8 of'12 '
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- STEP - ACTION / EXPECTED RESPONSE RESPONSE NOT OBTAINED l
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'8 Check If SI ACCUMs Should Be
, Isolated:_ .
- a. RCS pressure - LESS THAN a. Continue with Step 9., yJ E RCS .i
- " pressure is less than 1500 psig, 1600 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 than 1000 psig unti1~both-SI--
4 o
ACCUMs isolated.
I_F F any SI ACCUM can NOT be 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 I
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- ES-0.3 NATURAL CIRCULATION COOLDOWN WITH STEAM VOID IN. VESSEL PAGE 9 of 12 O
- STEP -
' ACTION / EXPECTED RESPONSE RESPONSE NOT OBTAINED' 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
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EDP TITLE:
REV: 1 ES-0.3; NATURAL CIRCULATION COOLDOWN WITH STEAM l A, VOID IN VESSEL' PAGE 10 of 12 I s
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' 1 STEP - ACTION / EXPECTED RESPONSE RESPONSE NOT OBTAINED l 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
service, THEN go to Step 12.
,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 protection system in service system can NOT be placed in 4 (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 REV: 1 '
ES-O'.3 : NATURAL CIRCULATION COOLDOWN WITH STEAM 4
j^p . VOID'IN VESSEL PAGE 11-of 12 !
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-STEP - . ACTION / EXPECTED RESPONSE RESPONSE NOT OBTAINED }
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%
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REV: -1 ES-0.3 NATURAL CIRCULATION COOLDOWN WITH STEAM fm 'N VOID IN VESSEL PAGE 12 of 12 Nj STEP -
ACTION / EXPECTED RESPONSE RESPONSE NOT OBTAINED 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.
- 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 SHUTD0VN l
L -END-1.:
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REVt 1 ES-0.3 NATURAL CIRCULATION COOLDOWN WITH STEAM !
.- ' VOID IN VESSEL PAGE 1 of 1 >
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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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RED PATil
SUMMARY
- a. SUBCRITICALITY - Nuclear power greater than 5% ,
o b ,. CORE COOLING - Core exit T/Cs greater than 1200'F .
I -OR-Core exit T/Cs greater than 700'F AH2 e
RVLIS level (no RCPs) less than 43% [46% r L adverse CNMT)
- 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 l RCS cold leg temperature less than 285'F
- e. CONTAINMENT - CNMT pressure greater than 60 psig f)
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- 10Pt TITti REV 1 ES-0.3 NATURAL CIRCULATION COOLDOWN WITH STEAM i
/7 <
VOID IN VESSEL PAGE 1 of 1 ,
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v FIGURE NC C/D WITH VOID IN UPPER HEAD ,
I RCS PRESSURE (PSIG) 2500 _...t.....__..1.__.__. __ - . . ._ . . _ __.._.__m_ .
_. .. . . ._ - _.._.._. ~ . - . _ . _ -
_ ^_ _ _ _ ._ . _ . _ . , _ . _ . , .
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0 i 200 250 300 350 400 450 500 550 600 650 700 RCS COLD LEG TEMPERATURE ('F)
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. EDP ilfL(t REV' 1 i ES-0.3 NATURAL CIRCULATION COOLDOWN WITH STEAM
' ,7
-s i-VOID IN VESSEL PAGE 1 of 1 '
FOLDOUT PAGE
- 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 i
V