ML20237J081

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Rev 0 to Emergency Contingency Instruction ECA-0.2, Recovery from Loss of All AC Power W/Safety Injection Required
ML20237J081
Person / Time
Site: Sequoyah  
Issue date: 08/21/1985
From: Patterson B, Strickland G
TENNESSEE VALLEY AUTHORITY
To:
Shared Package
ML20237H133 List: ... further results
References
ECA-.2, ECA-0.2, NUDOCS 8708170486
Download: ML20237J081 (11)
v • d • e


Text

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TENNESSEE VALLEY AUTHORITY s-SEQUCYAH NUCLEAR PLANT k

EMERGENCY CONTINGENCY INSTRUCTICJJ ECA-0.2 RECOVERY FROM LOSS OF ALL AC POWER WITH SI REQUIRED I

Revision 0 PREPARED BY:

G.

Strickland RESPONSIBLE SECTION: / Operations

/

REVISED BY:

N/A/j SUEMITTED BY:

jf((8/ /,4y Re'sponsible* Spdtion Supervisor PORC REVIEW DATE:

AUG 211985 APPROVED BY:

[ Egg %

Plant' Manager 2 1 1985 DATE APPROVED:

Reason for revision (include all Instruction Change Form :!os. ):

New instruction written per commitment to IUREG 0737.

The last page of this instruction is number:

9 I

8708170486 870811 PDR ADOCK 05000327 p

PDR t

SEQUOYAH NUCLEAR PLANT r

f i-PLANT INSTRUCTION REVISION LOG 1

EMERGENCY CONTINGENCY !:ISTRUCTION EC.'.- 0. 2

?2 VISION Date Pages

?IASON FOR REVISION (INCLUDE COM24IT-LEVEL ADoroved Affected MENTS AND ALL ICF FOFl4 NL'MBERS)

New instruction written per Octe nitten:

0 AUG 21 GM, ALL to 'TuREc 0737.

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'3 EtECbi/ERY FRO 31 LOSS OF \\LL.\\C POWER WITil SI REQU'HED 4

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A.

PURPOSE 1.

Establish Compondnt' Cooling Water t

2.

Establish ECCS now 3.

Slowly i*estore RCP seal cooling ij

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SYT1PTOBIS -

None 4

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TR ANSI, TION PRO 31 OTIIER INSTRUCTIONS

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1.

32CALO.0, Loss Of All AC Power 2.

EC A-0.1, Recovery F..vm' Loss of All AC Power tvithout dI Required d

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SQNP' EC A-0. 2 Unit 1 or 2.

.Page 2 of 3

.Rev. 0

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RECOVEP[Y FROM LOSS OF ALL AC POWER WITH SI REQUIRED STEP ACTION / EXPECTED IlESPONSE RESPONSE ':OT OBTAINED Note:

The purpose of this ECA should be reviewed prior to using this instruction CAUTION: ' The loads placed on the energized AC board should not exceed the capacity of the power supply i

Note:

Status Trees should be monitored for information only, 1-Establish RHR Valve Alignment Verify' RHR discharge f

a.

valves - OPEN -

1) FCV-74-16 and 28
2) FCV-63-93 and 94 b.

IF RWST level > 29%,

b.

IF RWST level < 29%,

TllEN verify suction TIIEN verify suction from RWST from entmt sump l

1) FCV-GJ-1 OPEN FCV-63-72 and 73 l

OPEN 2)

FCV-71-3 and 21 OPEN l

FCV-74-3 and 21 CLOSED

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.o SQNP EC A-0. 2 IInit 1 or 2 Page 3 of 9

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Rev. 0 1

RECOVERY FROM LOSS OF ALL AC POWER WITH SI REQIIIRED l

STEP ACTION /ENPECTED RESPONSE RESPONSE NOT OBTAINED 2

Establish SI Pump Valve Alignmen t a.

Verify SI Pump discharge valves - OPEN

1) FCV 152
2) FCV-63-153
3) FCV-63-22 b.

IF RWST level > 29?,,

b.

IF RWST 'evel < 29%.

I THEN verify suction from THEN verify suction from RWST 1:11R

1) FCV-63-5 OPEN FCV-6",-3, 4, and f

2)

FCV-03-47 and 48

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175 CLOSED OPEN FCV-63-6, 7, and 3 OPEN FCV-63-11 OPEN FCV-63-47 and 48 OPEN 3

Establish CCP Valve Alitinment a.

Verify BIT inlet and outlet

- OPEN

)

1) FCV-60-39 and 40

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3) FCV-G3-25 and 26 b.

.l_F RWST level > 20%,

b.

!f RWST level e '"Jh,

i TilEN verify suction from THEN verify suction RWST from RHR 1)

FCV-62-135 and 136 FCV-63-0 and 7 OPEN OPEN FCV-63-8 OPEN 1

a'.

a

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EC A-0. 2 Unit 1 01 2 Page 4 of 9 Rev. 0

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RECOVERY FROM LOSS OF ALL AC POWER WITil SI REQUIRED STEP ACTION / EXPECTED RESPONSE.

RESPONSE '!OT OBTAINED 4

Close RCP Thermal Barrier Return a.

Close FCV-70-87 or 90 5

Manually Start Following l

Equipment a.

Componen t Cooling Water Pumps b.

Individuauy start RHR Pumps and SI Pumps, as required, to estabush following:

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1) RCS subcooling > 40 F
2) Par level > 20%

[50% FOR ADVERSE CNTMT]

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SQNP ECA-0.2 Unit 1 or 2 Page 5 of 9 Rev. O f

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RECOVEI'.'Y FROM LOSS OF ALL AC POWER WITII SI REQUIRED STEP ACTION /ENPECTED RESPONSE RESPONSE 'OT OBTAINED 6

Establish CCP Operation

.IF NO_ CCP running, a.

IF CCP running, a.

THEN isolate RCP seal THEN maintain CCP injection using reach rods oper:. tion and continue outside seal water irdection with next step filter cubicles - iux Bldg 090

1)62-546 seal water injection filter bypass isolation
2)02-549 seal water injection filter A outle:t I,

isolation f.

3)62-550 seal water injection filter B outlet isolation b) AFTEhl verifying RCP seal injection isolated, THEN individually start CCPs, as required, to establish following:
1) RCS subcooling > 40 F
2) Par level > 201

[50% FOR ADVERSE CNTNT]

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3QNP.

EC A-0. 2.

Unit' 1 or 2 Page G of 9 Rev. O N

RECOVERY FROM LOSS OF ALL AC. POWER WIT 11 SI REOU11tED STEP ACTION / EXPECTED RESPONSE RESPONSE !OT OfsTAINED 7

Check' Cntmt Spray System a.

Place Catmt Spray Pumps in' A-Auto

.b.

IF cntmt press > 2.81 puig.

-THEN:

1)

Start Cntmt' Spray Pumps 2)

Start air return fans 3

Check CST Level a.

CST level > 3 ft a.

IF_ CST leve!

3 f t, j

T!iEN verify ERCW

tiignett to AFW b.

CST lt: vel > 17 f t b.

IF CST level <.17 f t, fi!EN attempt to refill UST vhile continuing with this instruction

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SQNP EC A-0. 2 Unit i or 2 Page 7 of 9 Rev. 0

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RECOVERY FROM LOSS OF ALL AC POWER WITII SI REQUIRED STEP Ar' TION /ENPECTED RESPONSE RESPO'ISE ':OT OBTAINED CAUTION:

If S/G narrow range level decreases to less than 25%,

then the Motor-driven AFW Pumps should be manually started to supply water to the S/Gs.

Note:

If Motor-driven AFW Pump operation is not required, then f

pump should be maintained in PULL-TO-LOCK to prevent automatic start.

l 9

Check Intact S/G Levels Narrow range S/G levels a.

a.

Manually start Mo to r-

> 25%

>Jriven AFW Pump and j

cerify AFW flaw to intact S/G b.

Control S/G levels between 25% and 50%

10 Place IIvdrogen Analyzers In Service a.

Refer to SOI-43. I 11 Check If Ilydrotren !;nnors Should Be i' laced in Service a.

IF cntmt hydrogen

!F entmt hydrogen a.

concentration < 0%,

3Iincon tra tian 6%,

I THEN:

"'!!EN ilo not. nergine hydrogen 1 tnitors and

1) Open ice condenser not tiy ;'SC AIIU ACBs on Rx Vent Bd A-A Compt GE and 7D and Rx Vent Bd B-B Compt lD and GE
2) Energize hydrogen ignitors

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____.______s SQNP f#'

ECA -0. 2 l' nit I or 2 li Page 8 of 9 6

Rev. O 7

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A RECOVERY FROM LOSS -OF AI.L AC POWER WITH SI REQUIRED _.

i STEP ACTION / EXPECTED RESPONSE

!iESPONSE NOT OBTAINED 1

i i

Note:

FRCs may now be implemented as necessary.

J CAUTION:

As part of subsequent recovery actions. RCPs f'

should not be started prior to a status evaluation, CAUTION:

RCP seal injection and thermal barrier should be established slowly to minimize RCP thermal stresses and potential seal failures.

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12 Establish RCP Thermal Barrier Cooling a.

Slowly establish Component s

Cooling Water to thermal barrier to reduce RCP bearing temp at' maximum rate of 1 F/ minute i

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O SQNP EC A-0. 2 Unit i "r 2 Page 9 of 9 Rev. 0

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k, RECOVERY FROM LOSS OF ALL AC POWER WITH SI REQUIRED j

i STEP ACTION / EXPECTED RESPONSE

[tESPONSF ' OT OBTAINED 13 Establish RCP Seal Injection AFTER establishing Component a.

Cooling Water to thermal barrier, THEN slowly establish seal injection flow to reduce RCP bearing temp at a maximum rate of 1 F/ minute

1) Open seal water return FCV-62-61 and 63
2) Open RCP number i seal leakoff FCV-62-9, 22, 35, and 18
3) Slowly open 62-642, seat water filter inlet, using reach rod outside seal water filter cubicle Aux Bldg 690
4) Fully open FCV-62-89
5) Slowly open 62-549 or 550, seal water injection filter outlet, using reach rod outside seal water

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injection filter cubicle Aux Bldg G90 14 Go To E-1. Loss Of P.eactor

'l Or Secondary Coolant

-END-l l

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