ML20205B819

Rev 2 to Emergency Operating Procedure EOP 35 ECA-0.1, Loss of All AC Power Recovery W/O SI Required

ML20205B819
Person / Time
Site:	Millstone, Haddam Neck, 05000000
Issue date:	06/15/1988
From:	CONNECTICUT YANKEE ATOMIC POWER CO.
To:
Shared Package
ML20204H467	List: A07413, Forwards Specific Emergency Operating Procedures for Use During Incident Response Ctr Activation ML20204H704 ML20204H734 ML20204H868 ML20204H928 ML20204H963 ML20204J027 ML20204J039 ML20204J092 ML20204J109 ML20204J115 ML20204J120 ML20204J128 ML20204J133 ML20204J139 ML20204J147 ML20204J497 ML20204J543 ML20204J565 ML20204J627 ML20204J633 ML20204J638 ML20204J642 ML20204J659 ML20204J669 ML20204J685 ML20204J707 ML20204J733 ML20204J739 ML20204J746 ML20204J767 ML20204J781 ML20204J786 ML20204J814 ML20204J824 ML20204J849 ML20204J853 ML20204J865 ML20204J878 ML20204J902 ML20204J914 ML20204J920 ML20204J939 ML20204J947 ML20204J954 ML20204J958 ML20204J965 ML20204J975 ML20204J982 ML20204J994 ... further results
References
EOP-35-ECA-.1, EOP-35-ECA-0.1, NUDOCS 8810260322
Download: ML20205B819 (13)

Text

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d STATION PROCEDURE COVER SHE A.

IDENTIFICATION Number: E0P 35 ECA-0.1 Rev.

2

Title:

LOSS OF ALL AC POWER RECOVERY WITHOUT SI REQUIRED Prepared By: H. K. COVIN 6.

REVIEW I have reviewed the above procedur'e and have found it to be satisfac' :ry.

TITLE SIGNATURE DATE DEPARTMENT HEAD 97b.

e, !j f_

ri-j C.

SPECIFIC UNREVIEWED SAFETY QUESTION EVALUATION REQUIRED:

Modifies intent of procedure and changes operation of systems as described in design documents.

YES [ ]

NO [ 4 (If yes, perform written USQ determination and Safety Evaluation, and contact Manager, Safety Analysis Branch to determine need for Integrated Safety Evaluation.)

EN'/ ?.ONMENTAL REVIEW REQUIRE 0

[Adverseenvironmentalimpact)

YES [ ]

NO (#

0, SPECIFIC SAFETY EVALUATION REQUIRED Affects response of safety systems, performance 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 I

contact Manager, Safety Analysis Branch to determine need for Integrated Safety Evaluation.)

E.

INTEGRATED SAFETY EVALUATION REQUIRED YCS [ ]

NO ( &

F.

PROCEDUREREQUIRES(bC)SORCREVIEW (In addition to review, itec) with a YES response must be documented in the' ORC'50RC meeting minutes.)

YES [ # NO ( )

G.

SORC APPROVAL

'50RC Meeting Number 3 gA -/o]

H.

APPROVAL AND IMPLEMENTATION The attached procedt e is her -

approved, and effective on the date below:

4

_& fi~- Y

" dation/ Service / Unit Superintendent Etfective Date SF301/9/s/SES/87-12/lofl 8810260322 881007 1

PDR ADOCK 05000213 P

PDR D

l l

1 E0P 35 ECA-0.1 Page 1 Rev. 2 i

i LOSS OF ALL AC POWER RECOVERY WITHOUT SI REQUIRED l

j Page No.

Eff, Rev.

1 - 12 2

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9 l'

le I

t a

1 I

t LOSS OF ALI AC POWER RECOVERY WIT 110UT E0P 35 2CA-0.1 Page 2 ii SI REOUIRED Rev. 2 1l li i!

1 A.

PURPOSE This procediare provides actions to use normal operational systems to f

stabilize plant conditions following restcration of ac emergency power.

B.

ENTRY CONDITION This procedure was written for Modes 1, 2, 3, and 4 assuming the RCS is hot and pressurized. Using this procedure when not in these modes requires a step by step evaluation to determine if the required action is still applicable to prevent plant conditions.

This procedure is entered from E0P 35 ECA-0.0, LOSS OF ALL AC POWER, Step 25, when ac emergency power is restored and SI is not required.

l l

I I

f cesces-r 3-44 i

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LOSS OF ALL AC POWER RECOVERY WITil0UT E0P 35 ECA-0.1 Page 3 SI REQUIRED Rev. 2 O

V STEP ACTION / EXPECTED RESPON$t RESPONSE NOT OSTAINED NOTE CSF status trees should be monitored for information only.

Other Functional Response Procedures should NOT be implemented prior to completion of Step 9.

1 Check RCP Seal Isolation Status a.

All four RCP seal a.

E valves open or supply valves outside position not known, containment - CLOSED THEN check charging pump status

1) H pump running, THEN go to Step 2.

2) IF pump NOT running, THEN manually close, valves before starting charging pump.

["

valves can NOT be manually close'd, THEN locally close valves, b.

Train A and B RPCCW b.

IF valve open or position containment return not known, THEN check outer isolation valves RPCCW pump status CLOSED

1) E pump running, THEN go to Step 2.

2) IF pump NM running, l y manually close valves.

2 Check Containment Isolation Perform the following Ph,se A - NOT ACTUATED

a. Reset contaiament isolation Phase A and Phase B

b. Establish instrument air to containment v

C P*>%S-1 SA4 J

t LOSS vF ALL AC POWER RECOVERY WITHOUT E0P 35 ECA-0.1 Page 4 SI REQUIRED Rev. 2 V)

(

STEP ACTH3N EXPECTED RESPONSE RESPONSE NOT ORT AINED CALTION The loads placed on the energized or emergency bus should not exceed the capacity of the power source.

3 Manually L.ad Following Equipment On AC Emergency Bus a.

Check Shutdown

a. Start one Shutdown instrument air -

instrument air compressor RUNNING compressor, b.

Check valve alignment and start RPCCW pump

1) Both Non-Safety

1) Manually align header supply and valves as return valves -

necessary.

OPEN

2) START one RPCCW pump per train c.

Check valve alignment and start charging pump

1) Check valve

1) Manually align aligument valves as necessary.

IF TT or BAT NOT available, THEN establish suction from RWST a) VCT to Charging a) OPEN suction pump suction valves valves trem valves - OPEN RWST.

b) VCT makeup control b) CLOSE suction system - SET FOR valves from VCT.

AUToriATIC CONTROL AND GREATER THAN RCS BORON CONCENTRATION c) Charging line c) OPEN Charging isolatton valve pump recirc to CLOSED RWST.

(~~)

m CPE(41 3-44 J

LOSS OF ALL AC POWER RECOVERY WITil0UT E0P 35 ECA-0.1 Page 5 l

SI REQUIRED Rev. 2

/N k_,)

STEP ACTIOWEXPECTED RESPON$E RESPONSE NOT OOTAINED d) Charging pump d) CLOSE Charging miniflow recire -

pump recirc to OPEN pump suction.

2) START one charging pump d.

PZR heaters e.

Available containment air recirculation fans f.

Control Bailding IIVAC Chiller g.

CRDM Cooling Fans h.

Auxiliary Building Filter Exhaust Fans J.

One Instrument Rack Rcom and Computer Rcom A/C Unit J.

Fuel Building Filter Exhaust Fans k.

Fuel pool cooling p ump 4

Establish Charging Flow 5

Verify SI Flow Not Required a.

RCS subcooling based

a. Go to E0P 35 ECA-0.2, on core extt TCs LOSS OF ALL AC POWER

> 30'F (9n*F FOR RECOVERY kITil SI ADVERSE CONTAIN: TENT)

Riqu! RED, Step 1.

b.

PZR level > 7.0*

b. Control charging flow (50% FOR ADVERSE to maintain PZR level.

CONTAINMENT)

If PZR level can NOT be maintained TiiEN go i

to E0P 35 ECA-0.2, LOSS OF ALL AC POWER RECOVERY WITil SI S1 REQUIRED, Step 1.

O CPM 641 3-64 J

Lv55 0F ALL AU'PvWER RECOVERY WITil0UT E0P 35 ECA-0.1 Page 6 SI R3 QUIRED Rev. 2 ILJ STEP ACTH3N EXPECTEO RESPONst RESPONSE NOT OBTAINED o

Check PZR Level > 17% (50%

Control charging flow as ADVERSE CONTAINMENT) necessary.

i CAUTICh' 1.

AFW pump suction should be shifted to the CST if DWST level decreases to ( 80,000 gal.

2.

If SG narrow range level decreases to 4.0% (34% for adverse containanent) and ATV flow is < 525 gpm, the MD ATV pumps should be manually loaded on ac emergency bus to supply water to the SGs.

NOTE If MD AFV pu p operation is not required, pump switches should be maintained in PULL-TO-LOCX t o prevent automatic atart.

7 Check Intact SG Levels a.

Narrow range level

a. Maintain AFW flow

> 4.0% (34% FOR ADVF.RSE

> 525 gpm until CONTAINMENT) nar.*ow range level t

> 4.0% (34% for adverse containment) in at least one SG.

IF AFW ;r NOT > 525 gpra. '. HEN Chick MD AFW flow l

co strol values - OPEN l

I START MD AFV pumps as necessary b.

Control AFW flow to maintain narrow range i

level between 4.0%

(34% for adverse l

containment) nd 501 I

t e

i cpi %A 1 3-64 J

r.

e LOSS OF ALL AC POWER REC 0VERY WITHOUT E0P 35 ECA-0.1 Page 7 SI REQUIRED Rev. 2 i

\\

U STEP ACTION / EXPECTED RESPONSE RESPONSE NOT OBTAINED i

8 Establish SG Prebsure Control a.

Set each SG atmospheric dump valve controller to maintain existing SG pressure b.

Plar:e each SG atmospheric dump valve controller in automatic mode 9

Place following Pump Switches In AUTO a.

SI pumps b.

RHR pumps c.

Quench Spray pump d.

Containment Recirculation Spray pump l

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LOSS OF ALL AC POWER RECOVERY VITHOLT E0P 35 ECA-0.1 Page 8 SI REQUIRED Rev. 2 o

G) f,TE P ACTiot(EXPECTED RESPONSE RESPONSE NOT OOTAINED CAUTION l

1.

RCP thermal barrier cooling should be established slowly to minimize potential introduction of steam into the RPCCW system.

RCP thermal barrier cooling should not be established to an RCP with excessive seal leakage.

2.

RCP seal injection should be established slowly (bearing temperature change approximately l'F/nin.) to minimize RCP thermal stresses and potential seal failures.

3.

As part of subsequent recovery actions, RCPs should not be started prior to status evaluation.

NOTE Cther Functional Response Procedures may now be implemented as necessary.

9

___10 Establish RCP Seal Cooling a.

OPEN Train A and B RPCCW containment return outer isolation valves b.

Check CLOSED Seal Supply Valve

{

c.

OPEN RCP seal supply isolation valves outside containment d.

Throttle OPEN Seal Supply s'a lve t

C W641 3-44 J

LOSS JF ALL AC POWER RECOVERY WITHOUT E0P 35 ECA-0.1 Page 9 SI REQUIRED Rev. 2

~s (G

i STEP ACTION EXPECTEO RESPONSE RESPONSE NOT OBTAINED 11 Check If RCP Seal Return Flow

~

Should Be Established a.

RCS pressure > 115 psia a.

G: to Step 12.

- SATISFIED b.

Verify RPCCW flow to seal

b. Establish 8PCCW flow water RX - ESTABLISilED to seal sater HX c.

Verify Seal Leakoff

c. Manually OPEN valves Valves - OPEN d.

OPEN RCP Seal Return Isolation Containment Valves 12 Check IF Letdown Can Be

a. Continue with Step 13.

Established:

WHEN PZR level increases a.

Check PZR level.> 17%

to > 17% (50% for advers e

[50% for adverse cor.tainment].

c on t a i nme n t ). THEN do Step 12b.

b.

Establish Letdown,

b. Establish excess

(}

letdown pe,r OP 3304A,

\\s '

CHARGING AND LETD0kN.

_ 13 Control Charging And Letdown Flow To Maintain PZR Level Between 17% (50% For Adverse Containment) And 50%

___14 Establish PZR Pressure Control a.

Check letdown - IN SERVICE

4. Use PZR 1 eaters and one PZR PORV to maintain FCS pressure.

Go to Step 15.

I b.

L'se PZR heaters and auxiliary spray to l

maintain RCS pressure p\\--]

OPN46 1 3 64 J

LO55 0F ALL AC' PukER RECOVERY WITHOUT E0P 35 ECA-0.1 Page 10 SI REQUIRED Rev. 2 (O

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STEP ACTION EXPECTED RESPONst RESPON$t NOT OSTAINED

___15 Verify Natural Circulation Increase dumping steam from intact SGs.

4.

RCS subcooling based on core exit TCs > 30*F (90*F FOR ADVERSE CONTAINMENT) b.

SG pressures - STABLE OR DECREASING c.

RCS hot leg temperatures -

STABLE OR DECREASING d.

Core exit TCs - STABLE OR DECREASING e.

RCS cold leg temperatures -

AT SATL' RATION TENPERATt'RE FOR SG PRESSURE

___16 Check If Source Range Detectors Should Be Energized

(

a.

Check intermediate ra:.ge

a. Continue with Step 17.

flux < 10E-10 amps b_ YEN flux < 10E-10 amps.

THEN do Steps 16b and c.

b.

Verify source range b, Manually energize source detectors - ENERGIZED range detectors or use Post Accident nuclear instrument monitors c.

Transfer nuclear recurders to source range scale oPM60 9 ) $4

~ - - - - - - - - - - - -

LOSS Of ALL AC POWER RECOVERY WITHOUT E0P 35 ECA-0.1 Page 11 SI REQUIRED Rev. 2 r

i\\U STEP ACTION. EXPECTED RESPONSE RESPONSE NOT OBTAINED g

i NOTE Non-vital power supply MCC 32-2G must be energized to run sample sink equipment.

_ 17 Verify Adequate Shutdown Margin a.

Sample RCS b.

Shutdown margin -

b. Borate as necessary.

ADEQUATE

~18 Maintain Plant Conditions STABLE a.

RCS pressure b.

PZR level c.

RCS temperatures d.

Intact SG levels s

_ 19 Verify SI Flow Not Required 4.

RCS subcooling based on 4.

Go to E0P 35 ECA-0.2, core exit TCs > 30*F LOSS OF ALL AC P0k'ER (90*F FOR ADVERSE CONTAINMENT)

RECOVERY WITH SI REQUIRED, Step 1.

b.

PZR level > ?.0* (50* }0R b.

Control charg6ng flow ADVERSE CONTAINMENT) to maintain PZR level.

IF PZR level can NOT be maintained THEN go to E0P 35 ECA-0.2, LOSS Of ALL AC PohTR RECOVERY WITH SI REQUIRED, Step 1.

OF$44-1 344

.e

LOSS v1 ALL AC POWER RECOVERY WITHOUT E0P 35 ECA-0.1 Page 12 SI REQUIRED Rev. 2 f-sa STEP ACTION EXPECTED RESPONSE RESPONSE NOT OSTAINED

___20 Try To Restore Offsite Poser IF 4160 volt Emergency Busses To All AC Busses CAN NOT be energized from RSST. THEN energize from NSST 4.

Restore power to 345KV Switchyard b.

Energize the RSST c.

Energize Emergency Busses 34C and 34D i

d.

Energize Busses 34A and 34B e.

Energize the NSST f.

Establish Normal Offsite Power Lineup

1. Verify AC emergency busses - energized by Os OFFSITE POWIR

1) RESET any LOP, SIS or CDA signal at

?!B2

2) STOP any unloaded diesel generator and place in standby

3) RESET Station LOP at both Sequencer panels 1

4) RESET, then turn ON each Diesel Sequence r i

Automatic Tester Loggle switch l

5) CLOSE Feeder Breakers to Emergency Cencrator I

Distribution Panels I

3EGS*PNLIA at 32-IT-3H I

and 3EGS*PN91A at

{

32 - l l:- 3 H l

r

2. Trans f e r 4100 volt busses to NSST f

3. Energtze 6.9KV busses from NSST l

___21 Consult Director of Station t

Emergency Organtzation (USE0)

Q Lo determine further action

-FIN \\f-c ase-i 344 i

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