ML20237H682

Rev 1 to Function Restoration Guidelines FR-Z.1, Response to High Containment Pressure

ML20237H682
Person / Time
Site:	Sequoyah
Issue date:	08/21/1985
From:	Patterson B, Strickland G TENNESSEE VALLEY AUTHORITY
To:
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References
FR-Z.1, NUDOCS 8708170311
Download: ML20237H682 (7)

Text

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4 TENNESSEE-VALLEY AUTHORITY

.r SEQUOYAH NUCLEAR PLANT m

FUNCTION RESTORATION GUIDELINES FR-Z.1 RESPONSE TOlHIGH CONTAINMENT PRESSURE s

Revision'1

[.Strickland PREPARED BY:

RESPONSIBLE SECTION:

Operatio

//

REVISED BY:

G.

kl d

SUBMITTED BY:

N 1

Rdsp6nsiple" ction Supervisor PORC REVIEW DATE:

AUG 211985 APPROVED BY:

ht2 ctN6o~

Plaht Manager DATE APPROVED:

i Reason for revision (include all Instruction Change Form Nos.):

Revised to add reference to status tree; cdd interlock of RHR spray valves to the RHR-containment sump valves; add step t o verify EGTS and ABGTS running.

The last page of this instruction is number:

5 4

- 8708170311 870811 DR ADDCK O 3 7-

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,n SEQUOYAH. NUCLEAR PLANT

{F PLANT INSTRUCTION REVISION LOG q.

FUNCTION RESTORATION GUIDELINES FR-Z.1 REVISION Date Pages REASON FOR REVISION (INCLUDE COMMIT-LEVEL Approved Affected MENTS AND ALL ICF FORM NUMBERS) 0 10/04/85 All Revised to add reference to status tree; add interlock of RHR spray valves to the

/

RHR-containment sump valves; add step to 1

AUG 21 1985 1,3,4,5 verify EGTS and ABGTS running.

.c sh 4hp ahe 46 e-e.

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0277L/mbs

SQNP FR-Z.1 Unit 1 or 2

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Page 1 of 5 Rev. 1

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RESPONSE TO HIGH CONTAINMENT PRESSURE A.

PURPOSE This guideline provides actions to respond to a high containment pressure

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B.

SYMPTOMS Cntmt press greater than 2.81 psig l

C.

TRANSITION FROM OTHER INSTRUCTIONS l

p Status Tree i

e c

'SQNP FR-Z.1. Unit 1 or 2 Page 2 of 5 Rev. 0 RESPONSE TO HIGH CONTAINMENT PRESSURE STEP

. ACTION / EXPECTED RESPONSE RESPONSE NOT OBTAINED

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1

' Verify Cntmt Spray Operation Establish at least one' traini of cntmt spray flow a.

Catmt Spray Pumps -

RUNNING y

b.

Cntmt spray outlet valves - OPEN c.

Verify entmt spray flow

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2 Verify Cntmt Isolation a.

Verify status monitor light:

1) Panel 6C - DARK

(

2) Panel 6D - DARK lse

3) Panel 6E - LIGHT

4) Panel 6F - LIGHT

5) Panel 6G - DARK except in outlined area

6) Panel 6H - DARK' 3

Verify Main Steamline Isolation a.

MSIVs - CLOSED b.

MSIV bypass valves -

..__.- CLOSED I(

L.

' I 1

,.e v

SQNP FR-Z.1 Unit 1 or 2 J

. Page 3 of 5

. j f

Rev. 1 C

1 RESPONSE TO-HIGH CONTAINMENT PRESSURE I

STEP ACTION / EXPECTED RESPONSE RESPONSE NOT OBTAINE 4

Ensure RCPs Tripped 4

5 Verify EGTS And ABGTS -

Establish at least one krain

- RUNNING of EGTS AND ABGTS 6

Check Ah Return Fans

. 3 -

a.

Verify air return fans start N 10 minutes after phase B 7

Check S/G Press IF the S/G with low or

- Ecreasing press has NOT a.' Press in all S/Gs within been isolated, C'

100 psi of each other THEN isolate S/G per

• E-2, FAULTED STEAM-b.

All S/G press -

GENERATOR ISOLATION STABLE OR INCREASING while continuing with ' this instructiort 8

Open Ice Condenser AHU ACBs a.

Rx Vent Bd A-A Compt GE and 7D b.

Rx Vent Bd B-B Compt 4D and 6E r

9 Energize. Hydrogen Ignitors a.

Pnl M-10 10 Place Cntmt Hydrogen Analyzers In Service a.

Refer to SOI-43.1 I '

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SQNP J

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FR-Z.1 Unit 1 or 2 I

Page 4 of 5 l

Rev. 1 l

C l

l RESPONSE TO HIGH CONTAINMENT PRESSURE

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f i

S_TEP ACTION / EXPECTED RESPONSE RESPONSE NOT OBTAINED f

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11 Check If RHR Spray Should Be Placed In Service a.

IF following conditions met:

a.

Do not place RHR spray in service

1) Cntmt press > 9.5 psig until all conditions met

2) At least I hour has elapsed since the beginning of the accident

3) RHR suction aligned to entmt sump

4) At least one CCP C

and one SI Pump running THEN place one train of RHR spray in service b.

Train B RHR spray b.

IF Train B RHR spray NOT available, THEN align Train A RHR spray

1) Close RHR crosstie Close RHR crosstie FCV-74-35 FCV-74-33

2) Close RHR injection Close RHR injection FCV-63-94 FCV-63-93 r

3) Open RHR spray Open RHR spray.

FCV-72-41 FCV-72-40 l

4) Leave Train A in Leave Train B in j

injection mode injection mode l

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SQNP FR-Z 1 Unit 1 or 2 Page 5 of 5 Rev. 1 C

RESPONSE TO HIGH_ CONTAINMENT PRESSURE STEP ACTION / EXPECTED. RESPONSE RESPONSE _NOT_OBTAINED g.:

12

. Check If Hydrogen Recombiners Should Be Placed In Service a.

IF cntmt hydrogen a.

IF cntmt hydrogen concentration between concentration > 6%

0.5% and 6%,

THEN THEN place recombiners in service per SOI-83

1) Do not place recombiners in service

2) Consult TSC to determine if entmt hydrogen purge can be placed in service per SOI-83 l(

.A 13 Return To Instruction In Effect

- END -

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