ML20205C190
| ML20205C190 | |
| Person / Time | |
|---|---|
| Site: | Millstone, Haddam Neck, 05000000 |
| Issue date: | 06/15/1988 |
| From: | CONNECTICUT YANKEE ATOMIC POWER CO. |
| To: | |
| Shared Package | |
| ML20204H467 | List:
|
| References | |
| EOP-35-ECA-1.1, NUDOCS 8810260417 | |
| Download: ML20205C190 (18) | |
Text
_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ - _ - _ _ _ _ _ _ _ _ _ _ _ _
STATION PROCEDURE COVER SHEt.
A. IDENTIFICATION Num' b er: EOP 35 ECA-1,1 Rev. 2
Title:
LOSS OF EMERGENCY COOLANT RECIRCULATION Prepared By: H. K. COVIN/J. L. BUCKINGHAM B. REVIEW I have reviewed the above procedure and have found it to be satisfactory.
TITLE SIGNATURE DATE DEPARTMENT HEAD G [/ ii-F l
C. SPECIFIC UNREVIEWED SAFETY QUESTION EVALUATION REQUIRED:
Modifies intent of procedure and changes operation of systems as described in design do'cuments. YES [ ] NO [ -T (If yes, perform written USQ determination and Safety Evaluation, and contact Manager, Safety Analysis Branch to determine need for Integrated Safety Evaluation.)
ENVIRONMENTAL REVIEW REQUIRED (Adverse environmental impact) YES [ ] NO [ W D. SPECIFIC SAFETY EVALUATION REQUIRED Affects response of safety systems, performance i of systems which may have been credited in the safety analysis or non-credited systems which may indirectly affect safety system response. YES [ ] NO [#
(If yes, perform written Safety Evaluation and contact Manager, Safety Analysis Branch to determine need for Integrated Safety Evaluation.)
{ E. INTEGRATED SAFETY EVALUATION REQUIRED YES [ ] NO [#
F. PROCEDURE REQUIRES PORC/SORC REVIEW (In addition to review, items with a YES response must be documented in the PORC/SORC meeting minutes.) Y E S G.-}- NO [ ]
G. 50RC APPROVAL SORC Heeting Number 3 MJ H. APPROVAL AND IMPLEMENTATION The attached procedure is hereby approved, and effective on the date below:
_, m, ' & /.>'- [Y l Station / Service / Unit Superintendent Effective Date i
i l SF301/9/s/SES/87-12/lof1 i
0010260417 001007 PDR ADOCK 05000213 P PDR i
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! !l l E0P as ECA-1.1 Page I t:
Rev. 2 L t ,
,' ,i G LOSS OF COOLANT RECIRCULATION i Ii t
'I i Page No. Eff. Rev.
.J 1-16 2 ,
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LOSS OF EMERGENCY COOLANT RECIRCULATION E0P 35 ECA-1.1 Page 2 Rev. 2 ,
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\_ / i-A. PURPOSE !'
This procedure provides actions to restore emergency coolant -
i recirculation capability, to delay depletion of the RWST by adding makeup and reducing outflow, and to depressurize the RCS to minimize i break flow.
B. ENTRY CONDITIONS r
This procedure was written for Modes 1, 2, and 3 assuming RHR system not in service. Using this procedure when not in these modes-requires a step by step evaluation to determine if the required action is still applicable to current plant conditions.
This procedure is entered from
- 1) E0P 35 E-1, LOSS OF REACTOR OR SECONDARY COOLANT, Step 12, when cold leg recirculation capability cannot be verified.
- 2) E0P 35 ES-1,3, TRANSFER TO COLD LEG RECIRCULATION, Step 2, when at least one flow path from the sump cannot be established or maintained.
- 3) E0P 35 ECA-1.2, LOCA OUTSIDE CONTAINKENT, Step 5, when a LOCA outside containment cannot be isolated. ,
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i oPSCA4-2 3-44
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. LOSS OF Et1ERGENCY COOLANT RECIRCULATION E0P 35 ECA-i.1 Page 3 Rev. 2 7-
't, STEP ACTION, EXPECTED RESPONSE RESPONSE NOT 087AINEO CAUTION
- 1. If emergency coolant recircu'.ation capability is restored during t- p.ocedure, further recovery actions .hould continue with procedure and ste, in effect.
- 2. If suction source '.s lost to any ECCS or spray pump, the pump shotid be -*opped.
1 Continue attempts to Try to restore at least one Restore Emergency Coolant train Recirculation Equipment 2 Add Makeup To RWST As Necessery per the manual makeup section of OP 3304C, (q CVCS tiAKEUP O
08%C48 1 3 a4
Lubb Ut LHtMUthL1 LVULANA KtLINGULA110N EOP 35 ECA-1.1 Page 4 Rev. 2 x
l i
- L. ,i STEP ACTION / EXPECTED RESPONSE RESPONSE NOT OBTAINED NOTE
- 1. Shutdown margin should be monitored during RCS cooldown.
- 2. Low steamline pressure SI should be blocked when PZR pressure decreases to < 2000 psie.
3 Commence RCS cooldown to Cold Shutdown'
- a. Maintain cooldown rate in RCS cold legs 100'F/HR
- b. Dump steam to condenser b. Dump steam to atmosphere from intact SG from intact SGs. IF capability to dump steam is available, THEN Go To Step 4. IF steam dump g available, THEN Co To Step 3d.
- c. Go to Step 4
(,,s\
\ssl d. Reestablish SG Blowdown from all intact SG's
- e. Align the Turbine e. Dump steam to condenser Driven Aux Feedwater from a faulted SG. IF Pump to receive steam dump to condenser steam from, and to NOT available THEN dump feed to, at least steam to atmosphere.
2 intact SG's 4
o 5 vn. , w
LOSS OF EMERGENCY COOLANT RECIRCULATION ECP 35 ECA-1.1 Page 5 Rev. 2
? }
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STEP ACTICH4/ EXPECTED RESPONSE RESPONSE NOT OBTAINED 4 Verify Containment Air Recirculation Fan Requirements
- a. Check Containment a. Go to Step 4e Pressure < 22.7 psia
- b. Check Containment b. IF containment sump Air Recirculation level < 4 ft., THEN Fans RUNNING START fans. IF containment sump level
> 4 ft., THEN Go To Step 4e.
- c. Check Containment c. OPEN va'ves Air Recirculatien Cooling Coil Supply and Return Valves OPEN
- d. Go to Step 5
- e. Check Containment e. STOP fans
()'
s_-
Air Recirculation Fans STOPPED 5 Check RWST level > 47,725 gal Go to Step 25.
6 Check Quench Spray Pump Requirements
- a. Check Containment a. Continue with Step 7.
Pressure < 13 psia WHEN containment pressure < 13 psia, THEN do steps 6b, c, and d.
- c. STOP ALL Quench Spray Pumps
- d. IF Containment Recire Spray pump (s) are NOT available for containment spray, THEN START /STOP a Quench Spray Pump as necessary to maintain
,_ Containment Pressure
/x \
< 13 psia b
OPSC641 3-84
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LOSS OF EMERGENCY COOLANT RECIRCULATION E0P 35 ECA-1.1 Page 6 Rev. 2
( ) '
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STEP ACTION / EXPECTED RESPONSE RESPONSE NOT OBTAINED i i
CAUTION This step should not be performed if it will disrupt efforts to align the Containment Recirculation Systam for Emergency Coolant Recirculatio..
- 7. Check containment Recirculation System Available for spray,
- a. Verify containment a. Verify containment sump level > 1.5 ft Recirculation Pumps are stopped AND proceed to Step 8.
Return to Step 7b when containment sump level
> 1.5 ft.
/3 b. Verify Containment
\- / Recirculation Pump (s) aligr.ed for contairtment spray - ONE PUMP PER TRAIN
- c. START /STOP Containment c. Use Quench Spray Pump (s)
Recirculation Pump (s) to control containment as necessary to maintain pressure < 13 psia.
containment pressure Proceed to Step 8.
< 13 psia.
- d. Verify SW aligiied to any RX with an operating Containment Recirculation Pump (s).
- e. STOP Quench Spray Pump (s).
CAUTION If offsite power is lost after SI resets, manual action may be required to restore safeguards equipment to desired status.
O k_- 8 RESET SI If Necessary CP9eM 3-84
=
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LOSS OF I.MERGENCY COOLANT RECIRCULATION E0P 35 ECA-1.1 Page 7 i Rev. 2
./
STEP ACUONiEXPECTED RESPONSE RESPONSE NOT OBTAINED 9 Establish One Train of ECCS
, Flow
- a. Check charging pump - a. Start or stop charging ONLY ONE RUNNING pum,os to establish only one running.
< 300 psia (450 psia Step 10.
FOR ADVERSE CONTAINMENT)
10 Verify No Backflow From RWST To Sump
- a. Check any Containment a. IF all pump suction Recire Pump suction isolation valves are Isolation OPEN CLOSED, THEN go to
[s\~-} Step 11.
- b. Verify containment recire b. Verify the appropriate spray to RHR valves - RHR pump 0FF @ Suction CLOSED Isolation from RWST -
CLOSED.
- c. Verify Containment Recire c CLOSE valve.
Supply and Return from RWST valve (3RSS-V25) CLOSED O PSG64 1 3-64
LOSS UF EMERGENCY COOLANT RECIRCULATION E0P 35 ECA-1.1 Page 8 Rev. 2
'% ,);
STEP ACTION /EXFICTED RESPONSE RESPONSE NOT OBTAINED CAUTION If seal cooling had previously been lost, the affected RCP(s) should not be started prior to a status evaluation.
- 11. Check RCP status
(90'F FOR ADVERSE CONTAINMENT)
Go to Step 12.
- c. Try to start an RCP
~s 2) Start One RCP.
('- I
/ 12. Check If S1 Can Be Terminated tstablish minimum S1 flow to
(140*F FOR ADVERSE 1) Determine minimum ECCS CONTAINMENT) flow required from OPS Form E0P 35 ECA-1.1-1.
- 2) Establish minimum ECCS flow.
- 3) Go to Step 18.
_____13. RESET Containment Isolation Phase A and Phase B.
- 14. Establish Instrument Air to Start one air compressor and Containment OPEN instrument air containment '
isolation valves.
O V
asm., 1. .
LOSS Of Et1ERGENCY COOLANT RECIRCULATION E0P 35 ECA-1.1 Page 9 Rev. 2 (x -
) ~
STEP ACTION / EXPECTED RESPONSE RES.mCNSE 2J0T OBTAINED
- 15. Stop ECCS Posps and Place in Standby
- a. STOP RHR pumps and place in AUTO ,
- c. STOP all but one charging pump and place in AUTO 16 .. Establish normal Charging Pump Injection Flow Path
- a. IF two charging pump cold leg injection valves are open, THEN CLOSE one valve
- b. Establish 60 gpm normal charging path
,-~3 c. CLOSE the Charging Pump
( C) 4 miniflow isolations to
' the RWST (3CHS*MV8511A/B)
- d. .CLOSE a Charging Pump Cold Leg Injection valve
- 17. OPEN the Charging Pump Recirc Isolations 18 Verify Adequ.ste RCS Makeup Flow
- a. Check RVLMS plenum a. Increase RCS Makeup level 3 19% flow to maintain RVLMS plenum level 2 19%
to maintain TCs stable OR decreasing O
V C PK44-1 3 64
4 LOSS OF EMERGENCY COOLANT RECIRCULATION E0P 35 ECA-1.1 Page 10 Rev. 2 r~ ,
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STEP ACTION / EXPECTED RESPONSE RESPCNSE NOT OBTAINED j.
t CAUTION:
If RCP seal differential pressure decreases to < 210 psid or No. I seal return flow < 0.2 gpm, affected RCPs should be tripped.
- a. Use normal PZR spray a. Use one PZR PORV. IF necessary, manually operate SI pumps to maintain RCS subcooling
> 30 F (90*F FOR ADVERSE CONTAINMENT). IF RCS can NOT be depressurized using any PZR PORV, TilEN use auxiliary spray,
- b. Depressurize RCS until either of the following
/~~ conditions exist:
(,); 1) RCS subcooling based on core exit TCs
< 40*F (100 F FOR ADVERSE CONTAINMENT)
-RR-
- 2) PZR level > 82% (54% FOR ADVERSE CONTAINMENT)
- c. Stop RCS depressurization
- 20. Check if RRR System Should Be Placed in tie Cooldown Mode
- a. Check a. Go to Step 21 RCS temperature < 350*F
$Np RCS pressare ' 390 psia
- b. Consult Director of Station Emergency Organization (DSEO) if RHR System should be placed in service.
O CPK641 3-64
. LOSS OF EMERGENCY COOLANT RECIRCULATION EOP 35 ECA-1.1 Page 11 Rev. 2 f,i C/
STEP ACTION / EXPECTED RESPONSE RESPONSE NOT OBTAINED
- 21. Check if SI Accumulators Should Be Isolated
- a. At least two RCS a. Continue with Step 22.
hot leg temperatures WHEN at least two RCS
< 375'F hot leg temperatures
< 375'F, THEN do Steps 21b and c.
- c. CLOSE all S1 accumulator c. Vent any unisolated isolation valves accumulators
- d. Remove power from accumulator isolation valves
_22. Check If RCPs Must Be Stopped
- a. Check the following: a. Go to Step 23
/h !) Number 1 seal
\_s/ differential pressure
< 210 psid
-OR-
- 2) Number 1 seal return flow < .2 gpm
- b. STOP affected RCP.
- 23. Check RCS Temperature > 200*F Go to Step 33
- 24. Check RWST Level < 47,725 gal Return to Step 1 25 STOP Pumps Taking Suction From RWST And Place Switches in POLL-TO-LOCK Position
- a. RHR pumps
- b. SI pumps
- c. Charging Pumps
- d. Quench spray pumps G
hPSCfA-1 ) 44
t LOSS OF EMERGENCY COOLANT RECIRCULATION E0P 35 ECA-1.1 Page 12 ,
Rev. 2 !
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i ACTION / EXPECTED RESPONSE RESPONSE NOT OBTAINED
_ STEP 26 Attempt to add Makeup to RCS from VCT g Lineup for AUTO
, a. Line up for manual makeup to the VCT per OP 3304C, CVCS MAhTUP
- b. OPEN the VCT to Charging Isolations
- c. CLOSE BOTH RWST Supply Charging Pump Suction Valves
- d. OPEN Charging Pump Recire Discharge Isolation
- e. START a Charging Pump
- f. Align to charge to RCS
{'h s_,)
via ANY ONE of the following headers
- 1) Normal Charging Header
- 2) Charging Header Bypass
- 4) High Pressure SI Line
t, ..
LOSS OF EMERGENCY COOLANT RECIRCULATION EOP 35 ECA-1.1 Page 13 Rev. 2
~
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v STEP ACTION / EXPECTED RESPONSE RE9PONSE NOT OBTAINED 27 Check if All Intact SG(s)
Should Be Depressurized to 675 psig
- a. Check SG pressures a. Go to Step 28
> 675 psig
- b. Dump steam to condenser b. Go to Step 27d at maximum rate
- c. Go to Step 27h
- d. Dump steam to c. Go to Step 27f atmosphere at maximum rate from intact SG(s)
- e. Go to Step 27h
(s)
N'
- g. Align the Turbine Drsve Aux. reedwater Pump to receive steam from and to feed to, at least 2 intact SG's
- h. bHEN SG pressures
< 675 psig, THEN Stop SG depressurization o
cTeuwsa s e<
LOSS OF EMERGENCY COOLANT RECIRCULATION EOP 35 ECA-1.1 Page 14 Rev. 2 x_
STEP ACTION / EXPECTED RESPONSE RESPONSE NOT OBTAINED 28 Depressurize All Intact .
SGs To Inject Accumulators As Necessa ry
- a. Dump steam to a. Go to Step 28c condenser as necessa ry to maintain RVLMS plenum level 2 19%
- b. Go to Step 28g
- c. Dump steam to d. Go to Step 28e atmosphere as necessary to maintain RVLMS plenum level 1 19%
- d. Go to Step 28g
- e. Roastablish SG Blowdown from all
- intact SG's
\_ f. Align the Turbine Driven Aux Feedwater Pump to receive steam from and to feed to, at least 2 intact SG's
- g. WHEN SG pressures is
< 134 psig, THEN St op SG depressurization n
O PSVA. 3 84
, n _ .. . _
. LOSS OF EMERGENCY COOLANT RECIRCULATION EOP 35 ECA-1.1 Page 15 Rev. 2 l,- )
L/
STEP ACTION / EXPECTED RESPONSE RESPONSE NOT ortAINED
_ _ _2 's Check If SI Accumulators Should Be Isolated
- a. At least two RCS hot a. Continue with Step 30. {
1eg temperatures WHEN at least two RCS l
< 375*F hot leg temperatures
< 375'F, THEN do
. Steps 29b and c.
l l
- c. CLOSE3<LL SI b. Vent any unisolated accumulator isolation accumulator valves and remove power to the valves 30 Check if RCPs Must Be Stopped
- a. Check the following: a. Go to Step 31
- 1) Number 1 seal
_, differential pressure
< 210 psid
(}
v
-OR-
- 2) Number 1 sesi return flow < .2 gpm
- b. STOP affected RCPs
- 31. Depressurize All Intact SCs
! To Atmospheric Pressure l a. Maintain cooldown ate I
in RCS cold legs
< 100*F/KR i
- h. Dump steam to condenser b. Dump steam to .stmosphere O
- m. , . ..
. LOSS OF Et1ERGENCY COOLANT RECIRCULATION E0P 35 ECA-1.1 Page 16 Rev. 2
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STEP ACTK)NiEXPECTED RESPONSE RESPONSE NOT OBTAINED 32 Check If RHR System Should Be Placed In Service
- a. Check RCS temperature a. Return to Step 31. -
< 350'F AED RCS pressure < 390 psia
- b. Consult Director of Station Emergency Organization (DSEO) to determine if RRR System should be placed ir, service i
33 Maintain RCS Heat Removal
- b. Go to Step 34
- c. Dump steam to c. Go to Step 33e
/'"% condenser
- d. Go to Step 34
- e. Dump steam to e. Dump steam to atmosphere atmosphere from from faulted SG intact SG 34 Consult Director of Station Emergency Organization (DSEO)
-FINAL-m U
OPM041 3 44
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- " A n= P 3 -2 7- N 2 'l FORM APPROVED BY UNIT 3 SUPERINTENDENT EFFECTIVE DATE PORC MTG NO. ;i
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(.! i .. i i . ' t , 't;: lii, , , el : - 1 i .. ' I ,J <; . to w scan t o,emo TI MI" ( %.) OPS Form E0P 35 ECA-1.1 1 Rev. O Page 1 of 1}}