ML20205A243

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Rev 2 to Emergency Operating Procedure EOP 573, Reactor Pressure Vessel Spray Cooling Emergency Procedure
ML20205A243
Person / Time
Site: Millstone, Haddam Neck, 05000000
Issue date: 05/20/1988
From: Kraemer R, Palmer R
CONNECTICUT YANKEE ATOMIC POWER CO.
To:
Shared Package
ML20204H467 List: ... further results
References
EOP-573, NUDOCS 8810250436
Download: ML20205A243 (5)
v • d • e


Text

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  • RPV Spray Cooling 50P 573 Page 1 .

Rev. 2 i

Unit 1 i

i RPV Spray Cooling Emergency Pro'cedure PAGE NO. EFF. REV.

1-2 .

2 i 2a,2b 2 E1*J osJtcTivts Enter few E0P 576 "Level testeration' stee 3.8.2 .

o Open All APR Velves Ensure ?.he RPV is enerossweized u

opereu con serey Free The Estenlish the serey sees of core IWppreslion Peel' SeeIIR$

O . v see sto 'aPv L.,e1 centret" wnen level resurge

References:

1) Emergency Procedure Guidelines, Millstone Unit One
2) Emergency Procedure Guidelines Appendix B
3) Emergency Procedure Guidelines, Appendix C
4) ACP-QA-3.02, Attachment A O

y P d; iPV . pray .co t ing h

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NPSH Requirements for Core Spray Pumps F i_g ure ld

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NPSH Requirements for LPCI Pumps E0P 573 RPV Sorcy Cooling

RPV Spray Cooling E0P 573 Page 2a I 1

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NPSH Requirements for LPCI Pumps E0P 572 RPV Spray Cooling

~ .

. RPV Spray Cooling E0P 573 Page 2 Rev. 2 r

" I

1. PURPOSE t

The purpose of this procedure is to provide core cooling if RPV t, water level drops below -127" (TAF) when the vessel is  !

depressurized.  ;

2. ENTRY CONDITIONS [

t 2.1 Enter this procedure from E0P $76 "RPV Level Restoration", '

(stap 3.8.2), ,

3. OPERATOR ACTION CAUTION Observe NPSH requirements for pumps takino a suction from the s I

Suppression Pool. If it can be determ8.ied ;W i.:ywell pressure  !

(CRP 925 PR 1602-9) did not exceed 10 r -;, at anytime, then use  ;

the NPSH requirement curves for non '.0CA condition (see Figures i Ic ana Id, Page 2b), otherwise use che curves for LOCA conditien l (see Figures la and Ib, Page 2a) i t

CAUTION j O Cooldown rates greater than 100'F/hr may be required to accomplish the following step.

j

......................................c............................  !

[

3.1 Open all 4 APR valves, t

3. 2 IF not all of the APR valves can be opened, {

THEN ocen other SRV's until a total of 4 valves are open.  !

3.3 Operate Core Spray subsystems with suction from the f Suppressico Pool. l 3.4 WHEN at least one Core Spray subsystem is operating with suction from the Suppression Pool AND RPV pressure is less than 90 psig, THEN terminate injection into the RPV from sources external to the Primary Containment.  !

l 3.5 IF RPV water level is restored to -127" (TAF), l l

THEN GO TO E0P 570 "RPV Level Control" to monitor and control  !

s RPV water level.  !

RK:1fg  !

FIN Al,  !

ECP $72 2PV Soray Cocling [

l

STATION PROCEDURE COVE 2 SHEET A. IDENT^FICATION Number: E0P 573 Rev. 2

Title:

RPV SPRAY COOLING EMERGENCY PROCEDURE Prepared By: R. KRAEMER

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

TITLE SIGNATURE DATE DEPARTMENT HEAD d.).h U hjo/gg

_ . h.%$ms 4 - --

$YA1 s

-- bu/Nh- ~

r f C. SPECIFIC UNREVIEWED SAFETY QUESTION EVALUATION REQUIRED:

Modifies intent of procedure and changes operation of systems as described in design dacuments. YES ( ) N3M_ j (If yes, perform written USQ determination and Safety Evaluation, and contact Manager, Safety Analysis Branch to determine need for Integrated Safety Evaluation.)

ENVIRONMENTAL REVIEV REQUIRED (Adverse environmental impact) YES ( ) NO ( #

0. SPECIFIC SAFETY EVALUATION REQUIRED A7)ects response of safety systecs, performance of systems which .nay have been credited in the safetv analysis or non-credited systems which may indirectly affact safety system response. YES [ NO ( )

(If yes, perform written Safety Evaluation and contact Manager, Safety Analysis Branch to determine need for Integrated Safety Evaluation.)

E. !NTEGRATED SAFETY EVALUATION REQUIRED YES d NO ( )

F. PROCEDURE REQUIRES PORC/50RC REVIEV (In addition to review, items with a YES response must be documented i: the PORC/SORC meeting minutes.) YES ( g NO ( )

G. P0h/50RCAPPROVAL GRC Meeting Number /"N-W H. APPROVAL AND IMPLEMENTATION Ine cttached procedure is hereby approved, and effective on the date below:

d/ M StatJtm/iervice A) nit Superintendent rk hs Effdetive'0 ate SF301/9/s/SES/87-12/lof1

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