ML20237H699

Rev 0 to Function Restoration Guidelines FR-I.1, Response to High Pressurizer Level

ML20237H699
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-I.1, NUDOCS 8708170317
Download: ML20237H699 (6)

Text

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TENNESSEE VALLEY-AUTHORITY SEQUOYAH NUCLEAR PLANT ,

FUNCTION RESTORATION GUIDELINES FR-I.1 RESPONSE T HIGH PRESSURIZER LEVEL ..

s Revision 0 PREPARED BY: G. Strickland RESPONSIBLE SECTION: perations /J ,

REVISED.BY:

,e( SUBMITTED BY:

MMN //

Re'siponsible Se ti'on Supervisor PORC REVIEW DATE: A 21 M '

APPROVED BY:  % v) -aTID ce w Plan't ME. nager .

DATE APPROVED: AUG 21 ig

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

New Instruction written per commitment to NUREG 0737. I 1

The last page of this instruction is number: 4 gg*ToiNfM/u7

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SEQUOYAH NUCLEAR PLANT PLANT INSTRUCTION REVISION LOG FUNCTION RESTORATION GUIDELINES FR-I.1 REVISION Date Pages REASON FOR REVISION (INCLUDE COMMIT-LEVEL Approved Affected MENTS AND ALL ICF FORM NUMBERS)

New instruction written per conenitment 0 %l!G 211985 All to NUnEG 0737 s

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SQNP FR-1.1 Unit 1 or 2 l

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RESPONSE TO HIGH PRESSURIZER LEVEL

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A. PURPOSE This guideline provides actions to respond to a high pressurizer level B. SYMPTOMS .

Pzr level greater'than 92%

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C. TRANSITION FROM OTHER INSTRUCTIONS  !

Status Tree

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O SQNP FR-I .1 Tinit 1 or 2 Page 2 of 4 Rev. 0 .

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RESPONSE TO HIGH PRESSURIZER LEVEL STEP _ ACTION / EXPECTED RESPONSE RESPONSE NOT OBTAINED 1 Check If SI Has Been Terminated IF SI has NOT been Ierminated,

a. BIT has previously been THEN do NOT use this isolated instruction Return to instruction in effect

b. SI Pumps have previously been stopped CAUTION: During RCS solid water operation, avoid any sudden increases in charging flow or sudden decreases in letdown flow so( 2 Check Charging In Sercice a.

Charging flow established IF charging isolated, THEN establish charging

a. Close "CV-62-89

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b. Open charging line isolation FCV-62-90 and 91

c. Open FCV-62-85 or 86

d. Adjust FCV-62-89 and 93 to establish following:

1) Seal injection flow 8 gpm per RCI

2) Pzr level stable

e. Open seal water return FCV-62-61 and 63 1 I

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SQNP FR-I .1 Unit 1 or 2 Page 3 of 4 Rev. O f '

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( RESPONSE TO HIGH PRESSURIZER LEVEL ~

STEP ACTION / EXPECTED RESPONSE RESPONSE NOT OBTAINED 3 Check Letdown In Service Establish letdown:  !

a. Verify one charging

a. Letdown flow established pump running

b. Open letdown isolation valves :

1) FCV-62-69

2) FCV-62-70

3) FCV-62-77

c. Adjust letdown press controller FCV-62-81 s 25% open and in manual

d. Open an orifice valve

e. Adjust FCV-62-81 for desired press, then place in AUTO

1) 320 psig at normal letdown temp IF letdown can NOT be Etablished., l THEN establish excess j letdown j I

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FR-I .1 Unit 1 or 2  !

Page 4 of 4 Rev. O C-i RESPONSE TO HIGH PRESSURIZER LEVEL l STEP ACTION / EXPECTED RESPONSE RESPONSE NOT OBTAINED i 4 Establish Pzr Press Control

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a, Match charging flow with letdown and seal injection flow

b. Control charging and letdown to maintain RCS press < 2235 psig

c. Turn on pzr heaters

d. Check pzr PORVs - d. IF_ RCS press CLOSED < 2335 psig, THEN close pzr PORV or bloc'k valve

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Check pzr spray valves -

CLOSED

e. IF_ RCS press

< 2250 psig, THEN close pzr spray valve or stop RCP supplying failed spray valve

f. Verify aux spray valve -

CLOSED

g. WHEN pzr liquid at saturation temp, THEN adjust charging and letdown to slowly decrease ,

pzr level as desired 5 Rcturn To Instruction In Effect

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