ML20204K077

Rev 3 to Emergency Operating Procedure FR-I.1, Response to High Pressurizer Level

ML20204K077
Person / Time
Site:	Millstone, Haddam Neck, 05000000
Issue date:	06/03/1988
From:	CONNECTICUT YANKEE ATOMIC POWER CO.
To:
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References
FR-I.1, NUDOCS 8810250338
Download: ML20204K077 (4)

Text

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NUMBER TTT12 REV. ISSUE /DA1T.

FR.I.1 RESPONSE TO HIGH PRESSURIZER LEVEL Rev. 3

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PURPOSE This procedure provides actions to respond to a high pressurizer level.

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SYMPTOMS OR ENTRY CONDITIONS This procedure is entered from F4.6, INVENTORY Critical Safety Function Status Tree on a YELLOW condition.

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0810250330 001007 l

PDR ADOCK 05000213 P

PDR

JUN 3 1988 NUMBER TTTLE REY. !SSUESATE F R.I.1 RESPONSE TO HIGH PRESSURIZER LEVEL Rev.3

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STEP ACTION / EXPECTED RESPONSE RESPONSE NOT OBTALNED 1

CHECK IF St IIAS BEEN TERMINATED:

a. Check both HPSI pumps STOPPED

a. RETURNIQ procedure and step ineffect.

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CAUTION:

CHARGING AND LETDOHN FLOWS SHOULD BE CAREFUU.Y CONTROU.ED TO AVOID SUDDEN RCS PRESSURE CHANGES SINCE THE PRZR AfAY BE SOUD OR THE PR7.R WATER SPACE TEhfPERATURE AfAY BE LESS THAN SATURATION TESIPERATURE FOR PRZR PRESSURE.

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2 CHECK IF CIIARGING FLOW HAS BEEN ESTABLISHED:

a. Check charging pumps -

a. Perform the following:

AT LEAST ONE RUNNING (STOP ONE PUMP IF DVO

1. Check CCW flow to RCP thermal PUMPS RUNNING) barriers established.

IE CCW flow to RCP thermal barriers b'QI established, THEN close RCP seal water supply valves CH V 345A thmugh CH V 354D.

2. Start one charging pump.

b. Check containment instrument

b. Start one containment instrument air pressure -

air compressor to establish GREATTIR THAN 118 PSIO instrument air pressure.

c. Check charging flow -

c. Perform the following:

ESTABLISHE)

1. Set CH FCV 110 and CH FCV Il0A for minimum flow.

2. Own Oi MOV 292B and C 1 MOV 292C.

d. Check charging pump suction-

d. Align charging pump suction to VCT ALIGNED TO VCT by performing die following:

1. Opcn CH MOV 257.

2. Close BA MOV 373 and BA MOV 32.

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JUN O lbOO NUMBER III d REV. ISSUE /DATE I

F R.I.1 RESPONSE TO HIGil PRESSURIZER LEVEL Rev.3 l

i STEP ACTION / EXPECTED RESPONSE RESPONSE NOT OBTALNED 1

3 CHECK LETDOWN IN SERVICE ESTABLISH LETDOWN.

(SEE OPPOSITE PAGE)

IE LETDOWN CAN b'QI BE ESTABLISHED AM2 CONTALNhtENT PRESSURE IS LESS THAN 5 PSIG, IHEN ESTABLISH ALTERNATE LETDOWN BY PERFORMING THE FOLLOWING:

1. Reset Containment HCP WL Relays.

2. Open DH TV 1841, drain header trip valve.

3. Reset solenoid in blowdown room for drain header trip valve, DH TV 1847.

4. Line up drain header to VCT:

a. Close DH V-408, drain header to PDT.

b. Open CH V 383, drain header to VCT,

5. Close breaker for DH htOV 310.

6. Open one loop drain htOV.

7. Throttle DH htOV 310 to maintain PRZR level, i

8. Close CH htOV 292B and CH htOV 292C.

4 CHECK IF RCP SEAL Wall!R STOP AFFECED RCP(s).

RETURN FLOW (s)IS GREATER THAN 0.2 GPhi 5

CHECK PRZR PRESSURE:

a. Check pressure -

a. Verify at least one PRZR PORV and LESS THAN 2350 PS!G its block valve are open.

IE EQIverified, TilEN o xn one PRZR PORV and its block va ve as necessary until PRZR pressure is less than 2350 PSIG.

b. Check pressure -

b. Control charging and letdovm flow LESS THAN 2030 PSIG as necessary to maintain PRZR pressure less than 2030 PSIG.

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JUN 3 1988 NUMBER TTTLE REY. ISSUE /DATE 17R I.1 RESPONSE TO HIGH PRESSURIZER LEVEL Rev.3 l

i STEP ACTION / EXPECTED RESPONSE RESPONSE NOTOBTAINED 6

VERIFY PRZR PORVs CLOSED MANUALLY CLOSE PRZR PORVs.

E ANY PORV CAN NOI BE CLOSED, THEN CLOSE ITS BLOCK VALVE, l

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TURN ON ALL PRZR HENERS I

8 CHECK PRZR SPRAY VALVES:

a. Check normal spray valves -

a. Place spray valve control switches in CLOSED closed position.

E any valve can NQI be closed, TIEN stop RCP(s) supplying failed j

spray valve (s),

b. Check auxiliary spray valve -

b. Manually close auxiliary spray valve.

CLOSED E valve can NQIbe closed, THEN isolate auxiliary spray line by j

Closing Charging line manual Isolation

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valves, CH Y 286 and CH.V 286B.

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CONTROL CHARGING AND LETDOWN FLOW AS NECESSARY TO MAINTAIN RCS PRESSURE STABLE I

10 CHECK PRZR LEVEL RETURNIQ STEP 9.

LESS THAN 86 %

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11 RETURNIQ PROCEDURE AND i

STEP IN EffECT r

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