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 ,

PREPARED BY: [.Strickland RESPONSIBLE SECTION: Operatio //

REVISED BY: G. kl d SUBMITTED BY:

N 1 .

ction Supervisor

,, Rdsp6nsiple" 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 8708113 7-DR ADDCK O '

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l SEQUOYAH. NUCLEAR PLANT

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. PLANT INSTRUCTION REVISION LOG .

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.

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SQNP

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

( RESPONSE TO HIGH CONTAINMENT PRESSURE -

A. PURPOSE

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This guideline provides actions to respond to a high containment pressure 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 2 Verify Cntmt Isolation ,,,

a. Verify status monitor light:

1) Panel 6C - DARK lse

( *

2) Panel 6D - DARK

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 -- -- - - -. -- -- -

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I

_ _ _ _ _ _ _ _ _ _ _ 1

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, , SQNP FR-Z.1 Unit 1 or 2 J

. Page 3 of 5 .j Rev. 1 f

C -

RESPONSE TO-HIGH CONTAINMENT PRESSURE I

1 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, 100 psi of each other THEN isolate S/G per

,, C' *

• 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

\ f

• I l

SQNP J

( .

FR-Z .1 Unit 1 or 2  !

I Page 4 of 5 l

Rev. 1 l l

C RESPONSE TO HIGH CONTAINMENT PRESSURE

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j l

l f

i S_TEP ACTION / EXPECTED RESPONSE RESPONSE NOT OBTAINED f j

i 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 and one SI Pump

,,C , 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

( '

. , 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

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