ML20205C811

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Rev 2 to Emergency Operating Procedure EOP 35 FR-Z.1, Response to High Containment Pressure
ML20205C811
Person / Time
Site: Millstone, Haddam Neck, 05000000
Issue date: 06/15/1988
From:
CONNECTICUT YANKEE ATOMIC POWER CO.
To:
Shared Package
ML20204H467 List: ... further results
References
EOP-35-FR-Z.1, NUDOCS 8810260577
Download: ML20205C811 (9)
v • d • e


Text

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3-31-87 87-12 Form Apprev;d by Station Sup;rintend5nt Effcctive Davo 50RC Mtg. No.

I STATION PROCEDURE COVER SHEET

/~'s A. IDENTI'FICATION

( )

Number: E0P 35 FR-Z.1 Rev. 2

Title:

RESPONSE TO HIGH CONTAINMENT PRESSURE Prepared By: J. A. Ruttar B. REVIEW I have reviewed the above procedure and have found it to be satisfactory.

TITLE SIGNATURE DATE DEPARTMENT HEAD 6///rF

< 3 C. SPECIFIC UNREVIEWED SAFETY QUESTION EVALUATION REQUIRED: -

Modifies intent of procedure and changes operation

  • of systems as described in design documents. YES [ ] NO [g (If yes, perform written USQ determination and Safety Evaluation, and contact Manager, Safety Analysis Branch to determine need for Integrated Safety Evaluation.)

ENVIRONMENTAL REVIEW REQUIRED U (Adverse environmental impact) YES [ ] NO [4 D. SPECIFIC SAFETY EVALUATION REQUIRED Affects response of safety systems, performance of systems which may have been credited in the safety analysis or non-credited systems which may indirectly affect safety system response. YES [ ] NO[I (If yes, perform written Safety Evaluation and contact Manager, Safety Analysis Branch to determine need for Integrated Safety Evaluation.)

E. INTEGRATED SAFETY EVALUATION REQUIRED YES [ ] NO ((

F. PROCEDURE REQUIRE b SORC REVIEW (In addition to revTew, items with a YES response must be documented in the @ SORC meeting minutes.) YES (( NO [ ]

G. SORC APPROVAL SORC Heeting Number 3 -8 7-N T H. APPROVAL AND IMPLEMENTATION reby approved, and effective on the date below:

The att fached

., e 5tal.1on/ Service / Unit Superintendent n ,e Effective Date SF 301 Rev. 9 Page 1 of 1 0010260577 001007 PDR ADOCK 05000213 P PDR

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E0P 35 FR-Z.1 ~Page 1  ;

.- Rev. 2  ;

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RESPONSE TO HIGH CONTAINMENT PRESSURE i t

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RESPONSE TO HIGH CONTAINMENT PRESSURE E0P 35 FR-Z.1 Page 2 Rev. 2 A. PURPOSE This procedute provides actions to respond to a high containment pressure.

B. ENTRY CONDITIONS This procedure was written for Fodes 1, 2, 3, and 4. 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-0.5, CONTAINMENT Critical Safety Function Status Tree on a RED or ORANGE condition.

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RESPONSE TO HIGH CONTAINMENT PRESSURE E0P 35 FR-Z.1 Paga 3 Rev. 2

'M STEP ACTION / EXPECTED RESPONSE RESPONSE NOT OSTAINED 1 Verify Containment Isolation CLOSE valves.

Phase A Valves - CLOSED CAUTION If E0P 35 ECA-1.1 LOSS OF EMERGENCY COOLANT RECIRCULATION, is in effect, containment spray should be operated as directed in E0P 35 ECA-1.1 rather than steps 3 and 6 below.

2 Determine if CDA has NOT occurred

a. Check Containment a. Go to Step 3
  • Pressure < 22.7 psia ,

AND ESF status panel GP4 CDA - NOT ILLUMINATED

b. Verify Containment Air b. START fans Recirculation Fans -

RUNNING

)

c. Go to Step 7 O

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RESPONSE TO HIGd CONTAINMENT PRESSURE E0P 35 FR-Z.1 Pega 4

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Rev. 2

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STEP ACTION /EXPECTIO RESPONSE RESPONSE NOT 08TAINED 3 Verify Quench Spray Operation

a. Check Quench Spray a. Go to Step 3c System Flow Exists
b. Go to Step 4
c. Check RWST - NOT EMPTY c. Go to Step 4
d. ' Verify Quench Spray d. START pumps Pumps RUNNING
e. Verify Quench Spray e. OPEN valves valve alignment
1. Quench Spray Pump ,

Discharge OPEN ,

2. Quench Spray Pump to Containment Spray OPEN
f. Check Quench Spray Pump f. Go to step 3h Flow - RESTORED

)

g. Go to Step 6
h. PULL TO LOCK all Containment Recirc pumps
1. RESET SI J. OPEN RWST Recirc Pump Suction Header Isolation Valves at MB1 (3QSS*A0V27 and 28)
k. Locally OPEN the Containment Recirc System Supply and Return from RWST manual vrive (3RSS-V25)

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MEsrvN5E TO HIGH GUNTAINMENT PRESSURE E0P 35 FR-Z.1 Paga 5 Rev. 2

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STEP ACTION / EXPECTED RESPONSE RESPONSE NOT OSTAINED NOTE The following steps, 3.1 through 3.p should only be performed for ONE Containment Recire pump. '

1. Remove power AND locally CLOSE Containment Recire Pump Suction Isolation l

Valve 3RSS*MOV23A : 32-4T-F8E or 3RSS*MOV23B : 32-4U-R3E or 3RSS*MOV23C : 32-47-F8H or 3RSS*MOV23D : 32-4U-R3H or

m. Unlock and OPEN the applicable Containment ,

Recirc pump Suction from .

RWST manual valve. '

Pump A: 3RSS*V29 or Pump B: 3RSS*V27 or Pump C: 3RSS*V28 or Pump D: 3RSS*V26 O

n. Verify Containment Recirc n. CLOSE valve pump to RHR Train Valve -

CLOSED

o. Verify Containment Recirc o. OPEN valve i pump to Containment Spray Header - OPEN
p. START the appropriate l' Containment Recirc pump 4 Verify Containment Isolation CLOSE valves Phase B Valves - CLOSED 7

5 Ve*ify Containment Air STOP fans Recirculation Fans - STOPPED

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. . _ _ . _ . _ _ , . _ _ . . . - _ _ _ , ._ _ _ _ _ _ _ . _ . . _ _ _ - -_.. , . _ . _ - - _ - - . - - - - - _ _ , . . - . - - ~ . . _ - - -

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MthrVNst TO HIGH CONTAINMENT PRESSURE EOP 35 FR-Z.1 Pega 6 Rev. 2

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STEP l ACTION / EXPECTED RESPONSE RESPONSE NOT OSTAINED 6 Verify Containment Recirculation Spray Operation

a. Check Containment a. Go to 11tep 6c Recirculation Pump Flow Present
b. Go to Step 7
c. Check CDA signal c. Return to Step 6a after present > 660 seconds 660 seconds has elapsed since receipt of CDA
d. Verify Containment d. Verify Containment Recirculation Pumps Sump Level > 1.5 feet RUNNING AND START pumps ,
e. Verify Containment e. OPEN' valves Recirculation valve alignment
1. Containment Recirculation Pump

, Suction Isolation

< OPEN

2. Containment Recirculation Pump Spray Header OPEN
3. Containment Recirculation Heat Exchanger Service Water Inlet OPEN
4. Containment Recirculation Heat Exchanger Service Water Outlet OPEN 7 Verify Main Steamline CLOSE valves Isolation AND Bypass Valves -

CLOSED 8 Verify Main Feedwater Isolation

a. Verify Motor AND Turbine a. TRIP pumps Driven Main Feed Pumps -

TRIPPED

b. Verify Main Feedwater b. CLOSE valves Isolation Valves -

CLOSED

- .. s.

D RESPONSE TO HIGH CONTAINMENT PRESSURE E0P 35 FR-2.1 Page 7 Rev. 2 l

(' -

eTEP ACTION / EXPECTED RESPONSE RESPONSE NOT OSTAINED

c. Verify Main Feedwater c. CLOSE valves Flow Control Valves -

CLOSED

d. Verify Main Feedwater d. CLOSE valves Flow Control Bypass Valves - CLOSED
e. Verify Steam Generator e. CLOSE valves Chemical Feed Pump Isolation Valves CLOSED CAUTION
1) At least one SG must be maintained available for RCS cooldown.
2) If all SGs are faulted, at least 75 gpm feed flow should be maintained to each SG.

9 Check if Auxiliary Feedwater O Flow Should continue to all SG

a. Check NO SG Pressure a. CLOSE affected SG DECREASING IN AN Auxiliary Feedwater UNCONTROLLED MANNER Control Valves (Motor AND NO SG COMPLETELY AND Turbine Driven DEPRESSURIZED Pump Lines) 4 O

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KEsr0Nst EU HIGH CUNIAINMENT PRESSURE EOP 35 FR-Z.1 Paga 8 Rev. 2 STEP ACTION / EXPECTED RESPONSE RESPONSE NOT OSTAINED 10 Check Hydrogen Concentration

a. Check Hydrogen concentration a. Obtain a hydrogen per OP 3313A, HYDROGEN concentration i

RECOMBINERS, HYDROGEN measurement at MONITORS AND RECOMBINER the Post Accident BUILDING VENTILATION Sampling Modulo and continue with Step 14 WHEN hydrogen concentration measurement available, THEN go to Step 10b.

b. Check Hydrogen b. Go to Step 11 concentration < 5.0%
c. Check Hydrogen c. Start hydrogen ,

concentration < 0.5% recogbiner system as per OP 3313A WYDROGEN RECOMBINERS AND RECOMBINER BUILDING r

d. Go to Step 14

() 11 Notify Director of Station Emergency Organization (DSEO)

Of Hydrogen Concentration Inside Containment i

12 Obtain A Hydrogen l Concentration Measurement periodically 13 Check If Hydrogen Recombiner System Should Be Started -

a. Check Hydrogen a. Go to Step 14 concentration - < 5%  ;

t

b. Start hydrogen recombiner system as per OP 3313A HYDROGEN RECOMBINERS AND RECOMBINER BUILDING 14 Return To Procedure And Step In Effect i

-FINAL-  !

H OPSO6441 3 44 l

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