ML20205C742

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Rev 1 to Emergency Operating Procedure EOP 35 FR-I.1, Response to High Pressurizer Level
ML20205C742
Person / Time
Site: Millstone, Haddam Neck, 05000000
Issue date: 12/13/1985
From:
CONNECTICUT YANKEE ATOMIC POWER CO.
To:
Shared Package
ML20204H467 List: ... further results
References
EOP-35-FR-I.1, NUDOCS 8810260562
Download: ML20205C742 (7)
v • d • e


Text

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E. J. Mroc:

  • 2-1-85 Form Apprcv;d by Station Supsrintendent Effective Date w

STATION PROCEDURE COVER SHEET A. IDENTIFICATION

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Number E0P 35 FR-I.1 Rev. 1_

Title RESPONSE TO HIGH PRESSURIZER LEVEL Prepared By G. Olson B. REVIEW I have reviewed the above procedure and have found it to be satisfactory.

TITLE SIGNATURE DATE DEPARTMENT HEAD I[b /

C. UNREVIEWED SAFETY QUESTION EVALUATION 00CUMENTATION REQUIRED:

(Significant change in procedure method or scope YES [ ] NO NJ as described in FSAR)

(If yes, document in PORC/SORC meeting minutes)

ENVIRONMENTAL IMPACT (Adverse environmental impact) YES [ ] NO[y]

(If yes, document in PORC/SORC meeting minutes)

D. INTEGRATED SAFETY REVIEW REQUIRED (Affects response of Safety Systems, performance YES [ ] NO [y]

of safety-related control systems or performance of control systems which may indirectly affect safety system response.)

(If yes, document in PORC/SORC meeting minutes.)

E. PROCEDURE REQUIRES b ORC REVIEW YES % NO [ ]

F. h $0RC APPROVAL h 0RC Meeting Number 3 -hM SS 4 G. APPROVAL AND IMPLEMENTATION TM attached procedure is hereby approved, and effective on the date below:

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rA f Station /Serwice/ Unit Superinten6ent l1-/3 -W Effective Date SF 301 Rev. 7 Ogto2gggg h oo7og Page 1 of 1 PDR P

E0P 35 FR-I.1 Page 1 Rev. 1 RESPONSE TO HIGH PRESSURIZER LEVEL Page No. Eff. Rev.

1-6 1 O

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RESPONSE TO HIGH PRESSURIZER LEVEL E0P 35 FR-I.1 Page 2 Rev. 1 A. PURPOSE This procedure provides actions to respond to a high pressurizer level.

B. ENTRY CONDITIONS This procedure was written for Modes 1, 2, 3 and 4 assuming RHR is not in service and SI has been terminated. Using this procedure when not in these modes requires a step by step evaluation to determine if the required action is still applicable to current plant conditions.

This procedure is entered from E0P 35 F-0.6, INVENTORY Critical Safety Function Status Tree on a YELLOW condition.

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RESPONSE TO HIGH PRESSURIZER LEVEL E0P 35 FR-I.1 Page 3 Rev. 1 STEP ACTION / EXPECTED RESPONSE RESPONSE NOT OSTAINED 1 Check if SI Has Been Return to procedure and Terminated step in effect.

a. SI pumps - ALL STOPPED
b. Charging to Cold Leg Cold Leg injection valves - CLOSED CAUTION Charging and letdowrt flows should be carefully-controlled to avoid sudden RCS pressure changes since the PZR may be water solid.

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RESPONSE TO HIGH PRESSURIZER ,- .

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STEP ACTION / EXPECTED R ESPON* ,

PP

  • 27 CSTMNED

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2 Check if Charging Flow >-

Established

a. Vt.Aty Recire Flowpm *

'$ Re ' t ESTABLISEED

b. Charging pump - AT LEAS' torr the icilc eing ONE RUNNING IF kP'. flow

't3 F . e rmal barrir -

lost, T'2

  • M 4 3eal T'ye~ction i effected RCP before starting charging pumps.
2. Start one charging Pump ~
3. IF geal injection flow isolated THEN restore seal injection to RCPs
c. Instrument Air to c. Establish instrument air

,~s Containment - ESTABLISHED to contair. ment.

1. One instrument air

(\>) compressor RUNNING

2. OPEN instrument air containment isolation valves
d. Charging flow - d. Establish normal ESTABLISHED charging flow I_F charging can NE be established, THEN establish excess letdown as per OP 3304A, CHARGING AND LETD0kW .

Go to Step 5.

3 Check Letdown - IN SERVICE Establish 120 gpm letdown AT 120 gpm IF letdown can NOT be established, THEN establish excess letdown as per OP 3304A, CHARGING AND LETD0%H

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RESPONSE TO HIGH PRESSURI?L LEVEL E0P 35 FR-1.1 Page 5 Rev. 1 STEP ACTION /EEPECTED RESPONSE RESPONSE NOT 08TAINED Check if RCP Seal Return Flow Should Be Established

a. RCS pressure > 115 psia a. Go to Step 5
b. Establish flow b. Go to Step 5
1. Verify RPCCW flow to Seal Water Heat Exchanger-ESTABLISHED
2. OPEN RCP seal return containment isolation valves.

5 Check PZR Pressure

a. Pressure - LESS THAN a. Verify at least one
  • 2350 PSIA PZR PO4V and block valve open. IF MOT, THEN open one PORV and block valve as necessary until pressure less than 2350 psia.
b. Pressure - LESS THAN b. Control charging and 2275 PSIA letdown flow as

! necessary to decrease PZR pressure to less than 2275 psia.

6 Verify PZR PORVs - CLOSED Manually close PORVs.

IF any valve can NOT be closed,

! THEN manually close its block valve.

7 Turn on PZR Heaters OP50441 3-44

RESPONSE TO MIGH PRESSURIZER LEVEL E0P 35 FR-I.1 Page 6 Rev. 1

~-' ACTICWEXPECTED RESPONSE RESPONSE NOT OBTAINED STEP 8 Check PZR Spray Valves

a. Normal spray valves - a. Manually close spray CLOSED valves. IF any valve can NOT be closed, THEN stop RCP(s) supplying failed spray valve (s).
b. Auxiliary spray valve - b. Manually close CLOSED auxiliary spray valve. IF valve can NOT be cl~o' sed, THEN perform the following
1. CLOSE Charging Header Flow Controller
2. CLOSE Letdown Low ,

Pressure Controller

3. OPEN one reactor coolant loop drain
4. OPEN excess letdown heat exchanger inlet isolation

.N 5. Check excess letdown

( ,

) diversion valve in VCT position

6. OPEN excess letdown flow control valve 9 Control Charging and Letdown Flow As Necessary To Maintain RCS Pressure Stable i 10 Check PZR Level - LESS Return To Step 9.

TRAN 89%

11 Return To Procedure And l Step In Effect

-FINAL-l l

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