ML20205A274

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Rev 1 to Emergency Operating Procedure EOP 576, Reactor Pressure Vessel Level Restoration Emergency Procedure
ML20205A274
Person / Time
Site: Millstone, Haddam Neck, 05000000
Issue date: 06/03/1988
From:
CONNECTICUT YANKEE ATOMIC POWER CO.
To:
Shared Package
ML20204H467 List: ... further results
References
EOP-576, NUDOCS 8810250446
Download: ML20205A274 (9)
v • d • e


Text

-

r E.J. Hroczka 8-25-03 -

corm $cproved by Station Suoerintendent Effective Date t

)

STATION PROCEOURE COVER CHEET A. IDENTIFICATION Number E0P 576 Rev. 1 Title RPV LEVEL RESTORAf!0N EMERGENCY PROCEDURE Prepared By W. R. McCollum ,

B. REVIEW I have reviewed the above procedure and have found it to be satisfactory.

TITLE $1GNATURE DATE DEPARTMENT HEAD -[ . 2/02/37 h*W h/W YW Z)h1fff C.o. jfRAA dolm C. UNREVIEVE0 SAFETY QUESTION EVALUATION DOCUMENTATION REQUIRED:

3 (Significant change in procedure method or scope as described in FSAR) YES[2 NO [ ] ]I (If yes, document in DORC/50RC meeting minutes)

ENVIRONMENTAL IMPACT (Adverse environmental impact) YES [ ] NO [d (If yes, docurcent in PORC/50RC meeting minutes)

D. PROCEDURE REQUIRFS PORC/$0RC REVIEW YES ['f NO [ ]

E. PORC/SORC APPROVAL PORC/SORC Heeting Number /"8['((

F. APPROVAL AND IMPLEMENTATION The atI. ached procedure is hereby approved, and effective on the date below:

NA 7.~ G sh J ,2o -fj*

Station /ServiceWnit Superintendent Effective Date SF-301 Rev. 6 0010250446 001007 13 DR ADGCK 050

s RPV L3 vel Restoration E0P 576 Page 1 Rev. 1

,~., Unit I l' v')

RPV Level Restorhtion Emergency Procedure PAGE NO. EFF. REV.

1-6 1 STEP 5 06JECTIVE5 Enter from CQP

$70 if RPV water level cannot be maintained

> TAF or E0P 577 Upon Deoressurtration b

l Initiate'IC l Release cold leg watar inventory b

t taonsn Injection Lineup Prepare for level restoration d

Monitor RPV tevel/ Pressure Diagnose plant conditions u

late Action Based Upon Parameter Trends and Systee Availability

  • GO TC E0P 570 "RPV Level Control"
GO TO E0P 573 "RP" spray Cooling"
Go 70 E0P $74 'RPV Steam Cooling"

References:

1) Emergency Procedure Guidelines, Millstone Unit One
2) Emergency Procedure Guidelines, Appendix 8 ,
3) Emergency Procedure Guidelines, Appendix C
4) ACP-QA-3.02, Attachment A ECP 576 RPV Level Restoration

i' I

RPV Level Restoration E0P 576 Page 2 Rev. 1

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1. PURPOSE

(%v)  ;

The purpose of this procedure is to restore RPV water level to above i top of active fuel.

l l

2. ENTRY CONDITIONS 2.1 This procedure is entered from E0P 570 "RPV Level Control" step 3.2 when RPV water level cannot be maintained above the top of the active fuel (TAF = -127),. or E0P 577 upon depressurization. l
3. OPERATOR ACTIONS While executing the following steps:  !

E Boron injection is required.

THEN GO TO E0P 575 "RPV Level /Rx Pcwer Control" E RPV water level cannot be determined, RPV Flooding is required, THEN GO TO E0P 578 "RPV Floodir.g".

E RPV Flooding is required for other reasons, LHM GO TO E0P 578 "RPV Flooding".

3.1 Initiate Isolation Candenser 3.2 Line-up for injection and start pumps in two or more of the following normal injection subsystems:

3.2.1 Condensate /Feedwater 3.2.2 LPCI A 3.2.3 LPCI B 3.2.4 Core Spray A 3.2.5 Core Spray B E0P 576 RPV Level Restoration

RPV Level Restoration E0P 576 Page 2a

- Rev. 1 .

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1. C04171045 REQUIRING RPV Floo0!NC A. RPY Level control (EOP $70)
1. RPY water level cannot be deteraleed.

B. Centatteent Control (E0P 540)

I

1. Drywell temperature reaches the RPY Saturation Te'perature.

e

2. Suppression Chamber pressure cannot be saintained below the Primary Containment Design Pressure.

C. RPV Level Restoration (EOP $76)

1. RPV water ieval cannot be determined.

4

0. RPV Level /h Power (EOP 575)
1. RPV water level cannot be determined, and h Power cannot be determined or maintained above 85.

II. 8090N INJECT!04 IEQUIREMENTS 6

A. h Power Control (EOP 572)

1. If the h is not shut down and Suppression Pool Temperature reaches 110*F.

l E0P 576 RPV Level Restoration

RPV Level Restoration E0P 576 Page 3

. Rev. 1 O

sj NOTE Completion of step 3.3 is not necessary for execution of step i 3.4. i 1

3.3 E at least two normal injection subsystems (step 3.2) can not be lined up, line-up as many of the following alternate injection subsystems as possible, BUT 00 NOT INJECT 3.3.1 SLC Test Tank OP 304".

3.3.2 M/U Water to SLC System "0P 304".

3.3.3 Boron Tank to SLC System "0P 304".

3.3.4 CRD Pump Test Line "0P 302".

3.3.5 CST to LPCl/CS "0P 335".

3.3.6 Fire System "0P 332A".

3.3.7 ESW to ECCS X-Tie "00 335" 3.4 Monitor RPV pressure and water level. Continue in this procedure at the step indicated in the following table.

RPV Pressure Region High* (> 33n psig) LO(< 330 psig)

$ '$ RISING ~

3.5 3.6

?%*

m :n 3 LOWERING 3.7 3.8 l

  • RPV pressure at which Core Spray Pump shut-off-head is reached.

EOF 576 RPV t.evel Restoration

l RPJ Level Restoration E0P 576 Page 4 Rev. 1 b')' While executing the following steps:

E the RPV water level trend reverses or RPV pressure changes region, THEN GO T0 step 3.4 of this procedure.

E RPV water level drops to -48" THEN prevent automatic RPV depressurization by depressing the APR Timer Reset pushbutton and CONTINUE to reset every minute UNTIL,

  • RPV water level is o -48", @

Drywell pressure is < 2 psig and the "High Drywell Pressure Reset" key is in the resat position, OR All Core Spray and LPCI pumps are not running, AND the "APR Auto-Blowdown A/C Interlock" alarm is clear.

3.5 RPV level rising end RPV pressure > 330 psig.

3.5.1 IF RPV water level is > -127" THEN GO TO E0P 570 "RPV Level Control", step 3.3. l 3.5.2 IF RPV water level is < -127" AND Undensate/Feedwater is available, THEN GO TO E0P 570 "RPV Level Control", step 3.3. l 3.5.3 IF RPV water level is < -127" AND E ndensate/Feedwater is not available, THEN GO TO E0P 577 "Emergency RPV Depressurization".

3. 6 RPV level rising and RPV pressure < 330 psig.

3.6.1 E RPV pressure is rising, THEN GO TO E0P 577 "Emergency RPV Depressurization" 3.6.2 E RPV pressure is M rising, WHEN RPV water level reaches -127" THEN GO TO E0P 570 "RPV Level Control", step 3.3.

E0P 576 RPV Level aestoration

RPV Level Restoration E0P 576 Page 4a Rev.1 ,

ICC5 AUTO-lm!TIATION ) i I

j APR - Drywell Hi Pressure (2 psig) M RPV Low Low Water Level ( 44") M AC !.'.terlock (1 C5 or 1 LPCI) M 120 Sec finer (Timed out)

Core Spray

  • Orywell Hi Pressure (2 pelg) M
  • RPV Low-Low we'.or Level ,(+44") WITH 68 APV Pressure '.aw (00-350 psig) $

I LPCI

  • Drywell Hi Pressure (2 psig) M a RPV Low-Low Water Level (-44") WITH RPV Pressure Low (300-350 psil)

)

l l

E0P $76 RPV l.evel Restoration

r>

RPV Level Restoration E0P 576 Page 5 Rev. 1 -

(D 3.7 RPV level lowering and RPV pressure > 330 psig.

V 3.7.1 H, Condensate /Feedwater is not operating, THEN attempt to start Condensate /Feedwater.

3.7.2 LF, CRD is not operating, THEN attempt to start CRD 3.7.3 E CRD is not operating, AND IF at least two normal injection subsystems are IIned-up for injection with pumps running, THEN GO TO E0P 577 "Emergency RPV Depressurization" 3.7.4 E CR0 is rot operating, AND IF no normal injection subsystem.is lined-up Tor injection with at least one pump running, THEN start pumps in the alternate injection subsystems which are lined-up for injection (step 3.3 of this procedure).

~

NOTE For Hydrogen / oxygen control following a LOCA, refer to section 7.6 of OP 311.

3.7.5 WHEN RPV level approaches -127" (TAF),

E any system, or normal injection subsystem, or a? ternate injection subsystem is lined-up with at least one pump running.

THEN GO TO E0P 577 "Emergency RPV Depressurization".

IF no system, or normal injection su'> system, or aTternate injection subsystem is liaed-up with at least one pump running, THEN GO TO E0P 574 "RPV Steam Cooling".

E0P 576 RPV Level Restoration

RPV Level Restoration E0P 576 Page 6

  • Rev. 1 0 3.8 RPV water level lowering and RPV pressure < 330 psig.  ;

3.8.1 IF no normal injection system is lined-up for injection Eth at least one pump running, THEN start pumps in the alternate injection subsystems which are lined-up for injection (step 3.3 of this procedure).

3.8.2 g RPV pressure is rising, THEN GO TO E0P 577 "Eu egency RPV Depressurizatior".

WHEN RPV water level drops to -127" (TAF),

THEN GO TO E0P 573 "RPV Spray Coeling".

WRM: dip O

FINAL 0

"CP ~;75 iPV *.evel iustoration

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