ML20204J824

From kanterella
Jump to navigation Jump to search
Rev 4 to Emergency Operating Procedure ECA-1.1, Loss of Emergency Coolant Recirculation
ML20204J824
Person / Time
Site: Millstone, Haddam Neck, 05000000
Issue date: 06/03/1988
From:
CONNECTICUT YANKEE ATOMIC POWER CO.
To:
Shared Package
ML20204H467 List: ... further results
References
ECA-1.1, NUDOCS 8810250260
Download: ML20204J824 (10)
v • d • e


Text

..

. e. #'O'A"?>

~

JUN 0 3198'8

,.i i n..u. 7 i,,

4

~-

.;t TTT1.E

'- ~

REV. ISSUE /DATE NU(fBER.,'. M.

I LOSS OF EMEP.GFNCY COOLANT A

7.g

"' M Rev. 4 i'

f REC)RCULATGIT..*.* ;.'::r.",-

.,2.~ -

.s

.-/

w...

l __..A

...PURPO5E l, r.:

Hset y.' d,

. This procedure provides r.ction.: to.tsore emergenc,v coolant recire'ula%n capabil'ty, to delay

.._w. depletion of theRWST b addhg makeup and reduung outflow, and to depessu ize the RCS to minimize bre,ak...ow.m.

~

j

".e *. - Bb.m.,.~ SYMPTOMS D,R EXTRY: CONDITIONS' p

.s.s ;. 3 3

~

@.+q_'

1his procedure is enter (frop;,,, ;

~,

it'r. -

r,cn :a

p. :,-p.

x, j*J,v"-?.#.1'..

E 1, LOSS OF R6ACiOR OR SECONDARY COOLAST, Step 12,

'. ~

when RPR rticirculatim cap;,bility cannot be established or maintained.

b. f~~ g_..

' ~

n

~.

'.2.

.ES 1.3,6 ANSFE}6TO RHR RECIRCULATION, Ste ) 3.

L_..,._._Lk d.,'.when at l':ast one flow path [ rom the ecminment cannot x established or maintained.

?..

w. :- -

~ ~~ - 3. "' ". 5-1.3, TRANSFER 'I O R HR RECIRCUi.A~l10N, Step 3,

-~

' hen no RHR pumps are operable.

w

18 l

-- 4.

ES 1.3,1EANSFER To RHR RECIRCULATION, Sap 3,

' ES 1.4,'LFANSFER.TO 1V.'O PATH RECIRCULATION, Step'1,

- -- +' .; 2.,

j M^'

, when corpisuunt 50mp su'; tion. tine indicates it is clogg d.

+.-

._..,,5.

...sES 1.4, TRANSFER 1O 'lWO I'ATH RECIRCULA*t10N, Step 3, i

'when no chargin~ pump are available and HPSI stut easitating.

j g

3.., :- -

Cl - --+ -

6: :.. EDP 3.1 ~51. M ANUAL A LIGNMWR Ol'IUR.TO HPSI CROSS TIE VALVES, l

l E.. K $3 h. :v10 - -r>dc ps 5.3 and.f;st;;. ; /, J'.J. ?. g C:2 1-when HPS! purhp su<.do,' vane lisieup m. n.t established or maintained.

5

c..,b :-

y.>,,; ;.

.... c,- s p'* *

.7,;.

hCA 1.2. LOCA.QUTSlJE CONTAINME.W. Step 3.

9-

' hen a LOCA outs *. ccntainment crmos be isolved.

I

%..tr I

i y :.,.

3 c.v t.. y, e -

4 t

'm g y.: t '.a.% ; '. n.% '.'- *p'.

} *,

( ', ~..

  • e

.~.

,.e..

l g

e a

.t

.a-1 l;

y J *% 'i w;. i. f-

i

.Tu v..t

....i :.- -.

g.::.

1,. m.,:-

4.

, J,... ..y,.

n

. A;;.-

0

  • _nd" e*

's

-~

~

  • ~ '

(,

... M.

. ~ ~ ~

.. v, v

c v. w

_i.p

. y,.-

4..

I r

l

't l

~c..

Page 1 of 10 8010250260 001007 PDR ADOCK 00u00213 p

PDR

i JUN 0 31988 i

NUMBER TTT12 REV. ISSUE /DATE l

ECA 1.1 LOSS OF EMERGENCY COOLANT Rev. 4 RECIRCULATION l

_.J STEP ACTION / EXPECTED RESPONSE RESPONSE NOT OBTAINED i

r 7

CAUTION:

o IF EMERGENCY COOIAhT RECIRCULATION CAPABlUTY IS RESTORED DURING THIS PROCEDURE, FURTHER RECOVERY ACTIONS SHOULD COhTINUE BY RETURNING TO PROCEDURE AND STEP IN EFFECT.

l 6

o IF SUCTION SOURCE IS LOST TO ANY SI OR RHR PUMP, THE PUMP SHOULD BE STOPPED.

L J

l 1

'IRY TO RESTORE EMERGENCY COOLANT RECIRCULATION EQUIPMENT 2

ADD MAKEUP TO' IRE RWST AS NECESSARY:

a. Close blender outlet to VCT, BA V-354
b. Open ciender outlet to RWST, BA V 391 l
c. Place BA FCV 11.~.C bypass switch in the ON position j

l l

l i

i l

t l

Page 2 of 10

o JUN 0 31988 NUMBER TITIE REV. ISSUE /DATE EC A 1.1 LOS5 OF EMERGENCY COOLANT Rev.4 RECIRCULATION STEP ACTION / EXPECTED RESPONSE RESPONSE NOT OBTAINED q

r CAUTION:

SHUTDOWN MARGIN SHOULD BE MONITORED DURING RCS COOLDOWN.

b J

3 INT"ADI RCS COOLDOWN TO l

COLD SliUTDOWN:

I

a. Maintain cooldown rate in RCS l

cold legs -

l LESS TIIAN 100* F / HR

b. Dump steam to condenser from intact
b. IE condenser b'QI available.

SG(s) using steam dump valves BIEN dump steam using one DR more of the following from intact SG(s):

a. Atmos heric vent valve.
b. Terry "urbint; steam sup sly valves.
c. Hor Jet steam supply va.ves.

IE no intact SO available, DIEN use faulted SG.

4 CHECK CONTAINMENT CARFANS:

a. Check all CARFANs - RUNNING
a. Start all available CARFANs.

l

b. Check face dampers - OPEN
b. Place face damper control switches in the TF.ST position.

l 5

CHECK RWST LEVEL GREATER QQIQ STEP 16.

l TIIAN 43,000 OALLONS 6

CliECK RWST LEVEL GREA~IT.R PERFORM Tile FOLLOWING:

DIAN 70.000 OALLONS i

a. IE two LPS! pumps running, IllEN stop one LPSI pump and I

place control switch in TPO.

b. Monitor operating LPSI pump AMP rneter for indication of l

cavitation.

l IE LPSI pump cavitates, InES stop LPSI pump and i

place control switci, in TPO.

Page 3 of 10

JUN 0 31988 bUMBER EU REV. ISSdh,VAE EC A 1,1 LOSS OF EhtERGENCY COOLANT Rev, 4 i

RECIRCULATION l

SEP ACTION /EXPECED RESK)NSC RESPON!E NOT OBTAINED 7

VERIFY CONTAINhENTSPRAY NOT REQUIRED:

a. Check containment pressure -
a. hianually initiate containnent spray, i

LESS THAN 40 PSIG WHEN containment pressure THEN close containment spray decreases to 35 PSIG, I

IE only one LPSI pump operable, THEN open RH htOV 31 (fire main to containment spray).

WHENcontainment aressure decreases to 35 PSIC,

THEN close RH htOV 31, r

7 CAUTON:

o IF OFF SITE POWER IS LOST AFTER Si RESET, AfANUAL ACTION AfAY BE REQUIRED TO RESTORE SAFEGUARDS EQUIPSfENT TO DESIRED STATUS.

o IF CONTROL SWITCH FOR ANY SHUTDOWN CHARGING PUSfP WAS TAKEN TO THE TRIP POSITION, THE PUSfP(S)

SIAY AUTO START WHEN BOTH Si WL RELAYS ARE RESET.

L J

8 RESET SI AND CONTAINMENT ISOLATION:

a. Check containment pressure -
a. Perfonn the following:

LESS THAN 5 PSIG

1. Open CKTs A13 and B13 in t

I DC panels A and B.

2. Reset SI WL Relays.
3. IF. charging pump control switch (es) are b'QIin TPO, THEN restore low cischarge pressure auto start for shutdown charging pump (s) by taking pump sontrol switch (es) to the "Trip" position then releasing switch (es) to the "Auto" ition.

' GQ IQ Ste 9.

b. Reset Si and containment isolation (SEE OPPOSITE PAGE)

I Page 4 of 10

k JUN 0 31088 i

NUMBER TTn.E REY. ISSUEsDATE EC A 1,1 LOSS OF EMERGENCY COOLANT Rev.4 RECIRCULATION STEP ACTION / EXPECTED RESPONSE RESPONSE NOT OBTAINED l

l 9

CHECK RWST LEVEL LESS Q.QI.Q STEP 12.

I THAN 130,000 GALLONS l

l 10 MONITOR CORE COOLING EQUIPMENT FOR CAVITATION DUE TO LOW RWST LEVEL l

11 ESTABLISH MINIMUM CORE COOLING FLOW TO REMOVE DECAY HEAT (RWST LEVEL LESS ' IRAN 130,000 GALLONS):

i

a. Check suction of one HPSI pump
a. Align suction of one HPSI pump QR one chuging pump -

QB one chuging pump to the RWST.

ALIGNED TO RWST

b. Check HPSI QR chuging pump
b. Start HPSI QR. charging pump.

aligned to RWST - RUNh1NG To stan the chuging pump take the pump control switch to the "Trip" d

then to the "Stan" position.

4

c. Determine minimum cort cooling flow l

]

required from Figure ECAll 1 j

d. Establish minimum required core cooling flow l
e. QQIQ Step 13 i

12 ESTABLISH ONE TRAIN OF St FL.OW l'

(RWST LEVEL GREATER l

T11AN 130,000 GALLONS) l

a. Check chuging pumps -
a. Operate charging pumps as necessary ONLY ONE RI.NNING by taxing the charging pump control switch to the "Trip" then to the "Stan"
position,
b. Check HPSI pumps -
b. Operate HPSI pumps as necessary.

ONLY ONE RUNNING l

c. Check RCS pressure -
c. Stop both LPSI pumps, LESS THAN 405 PSIG THEN QQIQ Step 13.

(635 PSIG FOR ADVERSE CONTAINMENT)

d. Check LPSI pumps -
d. Operate LPSI pumps as necessary.

ONLY ONE RUNNING I

i Page 5 of 10 i

JUN 0 31988 NUMBER TN REY. ISSLTJDATE ECA 1.1 LOSS OF EMERGENCY COOLANT Rev.4 RECIRCULATION S1IP ACTION / EXPECTED RESPONSE RESPONSE NOT OBTAIhTD 13 VERIFY ADEQUATE SI FLOW:

a. Check RVLIS :alenum indication -
a. Increase SI flos to maintain RVLIS GREATER TEAN 15 %

plenum indication greater than 15 "r.

b. Check core exit thermocou sles -
b. Increase SI flow to maintain core exit STABLE OR DECREAS NG thermocouples stable OR decreasing.

14 OIECK RWST LEVEL:

a. Check RWSTlevel -
a. RETURNIQ Step 1.

LESS THAN 70,000 GALLONS

b. E two LPSI pumps running, THEN stop one LPSI pump and place control switch in TPO
c. Check operating LPSI pump -
c. Stop operating LPSI pump and NOT CAVITATING place control switch in TPO.
d. Monitoroperating LPSIpump AMP meter forindication of cavitation E LPSI pu p cavitates, f

THEN stop LPSI pump and I

place control switch in TPO 15 CHECK RWST LEVEL RETURNIQ STEP 1.

LESS T11AN 43,000 GALLONS 16 STOP S1 PUMPS TAKING SUCnON FROM RWST:

a. Stop operating LPSI pump (s) and place control switch (cs)in TPO I
b. E two HPSI pum ss running, THEN stop one H PSI pump and place control switch in TPO
c. Check operating HPSI pump -
c. Stop operatirig HPSI pump and NOT CAVITATING place control switch in TPO.
d. Monitor operating HPSI pump AMP meter forindication of cavitanon E HPSI pum a cavitates.

l THEN stop EPSI and i

place control swit n

Page 6 of 10

JUN 0 31988 NUMBER TTTU!

REY. ISSUE /DATE EC A 1.1 LOSS OF EMERGENCY COOLANT Rey,4 RECIRCULATION STEP ACTION / EXPECTED RESPONSE RESPONSE NOT OBTALNED 17 TRY TO ADD MAKEUPTO RCS FROM ALERNAESOURCE:

a. Lineup charging pu,mp suction
a. O_Q IQ Step 17 b.

to VCT by perfomung the following:

1. St makeup to RWST close BA V 354
2. Align VCr makeup controls for automatic operation
3. Shift charpg pump suction to the VC,:

l

a. Opcn CH MOV-257
b. Close BA MOV 373
c. Close BA MOV 32
4. Allow VCTlevel to decrease to 30 %, to start AUTO makeup, IllEN adjust charging flow to match maximum makeup flow
5. QQIQ Step 18
b. Lineup a boric acid pump and a pnmary water pump directly to the charging pump suction by perfomung the following
1. Open boric acid to charging pump suction valve BA MOV 366.
2. Open prinwy water to cha"867.ing pump sucuon valve BA V-
3. Start prinwy water and boric acid pumps.
4. Close RWST suction valves BA MOV 373 and BA MOV 32.

Page 7 of 10

JUN031C86 NUMBER TIT U REV. ISSUE /DATE i

EC A 1.1 LOSS OF EMERGENCY COOLANT Rev.4 l

RECIRCULATION l

j STEP ACT10N/ EXPECTED RESPONSE RESPONSE NOT OBTAINED 18 DEPRESSURIZE ALLINTACT. SGs AT MAXIMUM RATE:

t

a. Dump steam to condenser at
a. Manually M locally dump steam maximum rate at maximum rate using one 2 mere of the following:

o Atmos >heric vent valve.

o Terry Turbine steam sup sly valves, o Hog Jet steam supply va ves.

19 CHECK IF RCPs MUST BE SHUTDOWN:

a. Check the following:
a. GQ IQ Step 20.

o Number 1 seal differential-LESS THAN 275 PSIG 2

o Number 1 sealleakoff flow -

LESS THAN 0.2 GPM j

4

b. Stop affected RCP(s) l
c. Shut seal water rerum MOV(s) on

{

affected RCP(s) i 20 DEPRESSURIZE ALL J. TACT SGs TO 50 PSIO:

)

a. Maintain cooldown rate in RCS cold cas -

LESS 'HAN 100' F / HR

b. Dump steam to the condenser
b. Manually G locally dump steam from intact SG(s) t.1ing one 2 more of the following:
1. Atmos >heric steam dump valve.
2. Terry Turbine steam sup sly valves.

l

3. Hog Jet str:am supply va' ves.

l I

I i

i Page 8 of 10

JUN 0 31988 NUMBER TTRE REY. ISSUEA) ATE l'

ECA 1.1 LOSS OF EMERGENCY COOLAST Rev,4 RECIRCULATION STEP ACTION / EXPECTED RESPONSE RESPONSE NOT OBTAINED 21 CllECK IF RHR SYSTEM SHOULD BE PLACED LN SERVICE:

a. Check the following:
a. RETUPS IQ Step 20.
o. Check RCS temperature -

LESS THAN 300* F (277' F FOR ADVERSE CONTAINMENT)

o. Check RCS pressure -

LESS TIIAN 300 PSIG (i 310 PSIG FOR ADVERSE CONTAINMENT)

b. Consult with plant engineering staff to determine if RHR System should be placed in senice 22 MAlhTAIN RCS HEAT REMOVAL:
a. Use RHR system ifin senice
b. Dump steam to condenser from
b. Manually OR kcally dump steam intact SGs from intact SGs using one DR more of the following:
1. Atmos sheric steam dump valve.
2. Terry Turbine steam sup sly valves.
3. Hog Jet steam supply va ves.

23 CONSULT PLANT ENGINEERING STAFF END i

Page 9 of 10

4 JUN 0 31988 NUMBER TTTIE REY. ISSUE /DATE ECA 1.1 LOSS OF EMERGENCY COOLANT Rev.4 RECIRCULATION t

I I

i m

i 250 \\

FLOW RATE

( GPM )

\\

2,00

\\\\

150

\\

too N

w S0 N

o 10 100 1000 tof1 TLNE

( MINVIES )

FIGURE ECAll 1 i

MINIMUM CORE COOLING FLOW RATE I

VERSES TIME AFTER REACTOR TRIP Page 10 of 10

Retrieved from "https://kanterella.com/w/index.php?title=ML20204J824&oldid=4065925"