ML20237H641

Rev 1 to Function Restoration Guidelines FR-H.3, Response to Steam Generator High Level

ML20237H641
Person / Time
Site:	Sequoyah
Issue date:	05/19/1987
From:	Strickland G, Terpstra G TENNESSEE VALLEY AUTHORITY
To:
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References
FR-H.3, NUDOCS 8708170299
Download: ML20237H641 (6)

Text

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TENNESSEE VALLEY AUTHORITY

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SEQUOYAH NUCLEAR PLANT FUNCTION RESTORATION GUIDELINES ..

FR-H.3 RESPONSE TO' STEAM GENERATOR HIGH LEVEL .-

.i Revision 1 ,

PREPARED BY: G. Strictland .

RESPONSIBLE SECTION: Operations REVISED BY: _

Gm t . TespareA SUBMITTED BY:, ,1 , /1

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• esponsible Section Supervisor PORC REVIEW DAT . MAY 191987 APPROVED BY:_ [Plant Manager DATE APPROVED: 'N I O IS N L

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

Revi;ed to make minor organization name change - step 4 changed HP to RAD CON. -

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The last page of this instruction is number: 4

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s SEQUOYAH NUCLEAR PLANT f[_. PLANT INSTRUCTION REVISION LOG _

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l f FUNCTION RESTORATION GUIDELINES FR-H.3 ~

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REVISION Date Pages REASON FOR REVISION (INCLudC COMMIT-LEVEL Approved Affected MENTS AND ALL ICF FORM NUMBERS)

New instruction written per commitment 0 08/21/85 All to NUREG 0737 .

[ g jgg7 Revised to make minor organization name 3

lgj 3' change - step 4 changed PP to RAD CON.

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SQNP FR-H.3 Unit 1 or 2 Page 1 of 4 R ev, O f

I k RESPONSE TO STEAM GENERATOR HIGH LEVEL

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A. PURPOSE This guideline provides actions to respond to a steam generator high level B. SYMPTOMS S/G level greater than 75%

C. TRANSITION FROM OTHER INSTRUCTIONS

1. FR-H.2, Response To Steam Generator Overpressure FR-H.4, Response To Loss of Normal Steam Release Capabilities

3. Status Tree l(

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SQNP FH-H.3 Unit 1 or 2 Page 2 of 4 Rev. O f

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( RESP 5NSE TO STEAM GENERATOR HIGH LEVEL S_TEP ACTION / EXPECTED RESPONSE RESPONSE NOT OBTAINED g.-

1 Identify Affected S/G

a. Narrow range S/G ' a. IF all S/G levels <. 75%,

level > 75% THEN return to instruction in effect 2 Verify MFW Isolation

a. MFW isolation valves - CLOSED

b. MFW reg valves - CLOSED ,

c. MFW bypass valves - CLOSED

d. MFW Pumps - TRIPPED 3 Verify AFW Isolation To Affected S/G

a. Motor-driven AFW level control valve - CLOSED

b. Turbine-driven AFW level control valve - CLOSED

c. Affected S/G AFW flow 0 gpm c

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' SQNP FR-H.3 Unit 1 or 2 Page 3 of 4 Rev. 1 RESPONSE TO STEAM GENERATOR HIGH LEVEL -

STEP ACTION / EXPECTED RESPONSE RESPONSE NOT OBTkINED i

4 Check Affected S/G Radiation - IF affected S/G radiation is f NORMAL Eigh, i a.

THEN consult with TSC to ,

Condenser exhaust monitors evaluate the following bptions: '

b. S/G blowckown monitors Increase supports for the main steamlines Pin or block the pipe hangers I Drain the main steamlines following Rad Con controls l Establish S/G blowdown following Rad Con l controls x Go to

• E-3, STEAM GENERATOR TUBE RUPTURE l IF condenser exhaust and 57G blowdown monitors

_ NOT available, i THEN:

{ Notify Rad Con to survey main l j

steamlines and S/G blowdown lines  ;

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Notify chem lab to sample S/G activity

{ Check RM-90-124 Aux Bldg 690 Y

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RESPS/I aac

t SQNP FR-H . 3 Unit 1 or 2 Page 4 of 4 Rev. O

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RESP 5NSE TO STEAM GENERATOR HIGH LEVEL i

. 1 STEP i ACTION / EXPECTED RESPONSE RESPONSE NOT OBTAINED 5 Establish Blowdown From Affected S/G 6 Check Affected S/G Level

a. Narrow range S/G level -  !

DECREASING ~ f l

b. I_F affected S/G level has {

reached the main steamline

(> 90% S/G narrow range level),,

THEN: 1 l

1) Do NOT depressurize affected S/G '

2) Close affected S/G

, , MSIV and bypass valve

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3) Close steam supply from affected S/G to turbine-driven AFW pump

4) Drain main steamline ,

1 7 Return To Instruction In Effect i

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