ML20237H649

Rev 0 to Function Restoration Guidelines FR-H.4, Response to Loss of Normal Steam Release Capabilities

ML20237H649
Person / Time
Site:	Sequoyah
Issue date:	08/21/1985
From:	Patterson B, Strickland G TENNESSEE VALLEY AUTHORITY
To:
Shared Package
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References
FR-H.4, NUDOCS 8708170301
Download: ML20237H649 (5)

Text

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TENNESSEE VALLEY-AUTHORITY C ,

SEQUOYAH NUCLEAR PLANT ,

FUNCTION RESTORATION GUIDELINES ,,

FR-H.4 RESPONSE TO LOSS OF NORMAL STEAM RELEASE CAPABILITIES -

s i

Revision 0 .

PREPARED BY: G. Strickland

-RESPONSIBLESECTION:!Operationu

/

REVISED BY:

SUBMITTED BY: 8/ [ - -

Responsibl6 Se tion' Supervisor.

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.e PORC REVIEW DATE: AQ 21 M l APPROVED BY: %d (A Plaht' Manager DATE APPROVED:

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

New Instruction written per commitment to NUREG 0737.

i The last page of this instruction is number:_ 3 ,

8708170301 ADOCK O B7ph7 {

PDR pg P

c_ . _ _ _ _ _. __ - 1.

l SEQUOYAH NUCLEAR PLANT

[ . PLANT INSTRUCTION REVISION ~ LOG

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l FUNCTION RESTORATION GUIDELINES FR-H.4 REVISION _ Date Pages REASON FOR REVISION-(INCLUDE COMMIT-LEVEL Approved Affected MENTS AND ALL'ICF FORM NUMBERS)

New instruction written per commitment

'o' ~ '.AUG 211985 All to NUREG 0737

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0265L/mbs

SQNP FR-H . 4 Unit 1 or '

Page 1 of 3 Rev. O RESPONSE TO LOSS OF NORMAL STEAM RELEASE CAPABILITIES A. PURPOSE This guideline provides actions to respond to a failure of the steam generator power operated relief valves and condenser dump valves B. SYMPTOMS s

S/G press greater than 1064 psig l ~

C. TRANSITION FROM OTHER INSTRUCTIONS l Status Tree O

u ____ _ ---_---- - - - - - - - - _ - - - - - - - - - - - - - - - - - - - - - -

4 SQNP Unit 1 or 2

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• FR-H .4 Page 2 of 3 Rev. O

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RESPONSE TO LOSS OF NORMAL STEAM RELEASE CAPABILITIES STEP __

ACTION / EXPECTED RESPONSE RESPONSE NOT OBTAINED 1 Identify Affected S/G

a. S/G press > 1064 psig a. E al S/G press

< 1064 psig, i THEN return to  !

instruction in effect 2 Restore S/G PORV Control ~ Attempt to control S/G PORV from auxiliary

a. PORV handswitch not control room or locally in close ,,

b. Adjust PORV controller

c. Air supply available f d. 125-V DC available

. ,e(k #

3 Restore Condenser Dump Control

a. Air supply available

b. 125-V DC available

c. At least one CCW Pump running

d. Condenser vacuum established

e. Dumps in press control mode

f. Steam dump interlock bypassed when T-avg

< 540 F

g. Adjust press controller

h. Check MSIVs open h. IF MSIVs closed,  ;

THEN open MSIV bypass _

valves prior to opening -

MSIVs m

i SQNP FR-H.4 Unit 1 or 2 Page 3 of 3 Rev.O N. RESPONSE TO LOSS OF NORMAL STEAM RELEASE CAPABILITIES STEP ACTION / EXPECTED RESPONSE RESPONSE NOT OBTAINED 4 Depressurize Affected S/G

a. IF water is NOT iri a. IF water is in main main steamline (< 90% S/G steamline (> 90% S/G narrow range level), narrow range level),

THEN depressurize THEN refer to

• FR-H.3, affected S/G < 1064 psig RESPONSE TO STEAM  !

using S/G PORV or GENERATOR HIGH condenser steam dump LEVEL 5 Return To Instruction In Ff.fect ,

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A , - END -

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