ML20205A295

Rev 1 to Emergency Operating Procedure EOP 579, Alternate Shutdown Cooling Emergency Procedure

ML20205A295
Person / Time
Site:	Millstone, Haddam Neck, 05000000
Issue date:	03/20/1984
From:	Mccollum W, Palmer R CONNECTICUT YANKEE ATOMIC POWER CO.
To:
Shared Package
ML20204H467	List: A07413, Forwards Specific Emergency Operating Procedures for Use During Incident Response Ctr Activation ML20204H704 ML20204H734 ML20204H868 ML20204H928 ML20204H963 ML20204J027 ML20204J039 ML20204J092 ML20204J109 ML20204J115 ML20204J120 ML20204J128 ML20204J133 ML20204J139 ML20204J147 ML20204J497 ML20204J543 ML20204J565 ML20204J627 ML20204J633 ML20204J638 ML20204J642 ML20204J659 ML20204J669 ML20204J685 ML20204J707 ML20204J733 ML20204J739 ML20204J746 ML20204J767 ML20204J781 ML20204J786 ML20204J814 ML20204J824 ML20204J849 ML20204J853 ML20204J865 ML20204J878 ML20204J902 ML20204J914 ML20204J920 ML20204J939 ML20204J947 ML20204J954 ML20204J958 ML20204J965 ML20204J975 ML20204J982 ML20204J994 ... further results
References
EOP-579, NUDOCS 8810250456
Download: ML20205A295 (4)

Text

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E.J. Mroc:ka 8-25-83 i

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form Approved by Station Superintenderat Effective Date

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1 STATION PROCEDURE C0VER SHEET l

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IDENTIFICATION Number E0P 579 Rev.

1 Title Alternste Shutdown ioolina Em2rcency Procedure Prepared By W. R. McCollum B.. REVIEW I have reviewed the above procedure and have found it to bo satisfactory.

TITLE SIGNATURE DATE DEPARTMENT MEAD k.1 a.

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2/$h'f C.

UNREVIEWED SAFETY QUESTION EVALUATION DOCUMENTATION REQUIRED:

O (Significant change in procedure method or scope as described in FSAR)

YES (

NO [ ]

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

ENVIRONMENTAL IMPACT (Adverse environmental impact).

YES [ ]

NO (

(If yes, document in PORC/50RC meeting minutes)

D.

PROCEDURE REQUIRES PORC/50RC REVIEW YES NO ( )

E.

PORC/50RC APPROVAL SORC Meeting Number MM F.

APPROVAL AND IMPLEMENTATION The attached procujure is hereby approved, and effective on the date below:

hy 47 W 7-2* VY Station / Service /Unff Superintendent Effecove Date

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SF-301 Rev. 6 O

8810250456 881007 PDR ADOCK 05000210 P

PDR

e Alternate Shut-Down Cooling E0P 579 Page 1 Rev. 3 Unit 1 Alternate Shutdown Cocling Emergency Procedure

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EFF. REV.

iTLP) 00JtCT!vt$

I enter free EOP $70 *tPV Level Centre 1*.

tot $71 'tPV Pressure contre)

(De 575 "RPV Level /Rm Power Centre 1' b

(Initiate $PCoeling]

Establish necessary.fstee linows l1solete RPVl Avoid inventory less L

Allow RPV pressuritation l

[ Open Satv]

Establish ASDC flowpath i.

A Raise RPv Establish A50C flowpath water tevei O

5 tart one Establish necessary systee f

CS er LPCI P eo lineups b

Increase flow Cossence A50C Te essainum

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Iseintain RPV Prevent brittle fracture

'*3 Toeperature e 70*F b

Proceed to Return to nero41 precedwres teie soutee-n

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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-E0P 579 Alternate Shut-Down Cooling

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e Alternate SM,t-Dorn Cooling E0P 579 Page 2 Rev. 1 l

1.

PURPOSE i

The purpose of this procedure is to provide RPV cooldown when required, but cannot be accomplished using normal shutdown cooling l

or other pressure control systems and all control rods are inserted beyond position 04.

Simultaneously, with implementation of E0P 579 "Alternate Shutdown Cooling", the operator is directed to exit E0P 570 "RPV Level Control, since E0P 579 "Alternate Shutdown Cooling" (ASDC) will d

intenticnally raise RPV water level above the band specified therein.

2.

ENTRY CONDITIONS 2.)

This procedure is entered from:

{

2.1.1 E0P 570 "RPV Level Control".

s 2.1.2 E0P 571 "RPV Pressure Control".

2.1.3 E0P 575 "RPV Level /Rx Power".

3.

OPERATOR ACTIONS 3.1 Initiate suppression pool cooling.

_ 3. 2 Close the RPV head vents, MSIVs, and main steam lini drain j

valves.

3. 3 Place the control switch for one SRV in the oper position.

3.4 Slowly raise (prevent Main Steam Line thermal shock) the RPV water Ivvel to establish a flow path through the open SRV back to the suppression pool.

NOTE 1

Injection source may be shifted from feed / condensate to ECCS at l

this time a

i 3.5 Start one CS or LPCI pump with suction from the suppression l

pool.

l NOTE i

j LPCI is preferred because of flow path through r, ore.

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E0P $79 Alternate Shut-bn Cooling 1

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1 Alternate Shut-Down Cooling E0P 5/9 Page 3 Rev. 1 O

3.6 Slowly raise CS or LPCI infection flow into the RPV to the maximum.

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3.6.1 If RPV pressure does not stabilize at least 73 psig above suppression chamber p.* essure.

THEN, start another CS or LPCI pump.

3.6.2 JFRPVpressuredoesnotstabilizebelow227psig i

j THEN, open another SRV.

3.6.3 IF the cooldown rate exceeds 100*F/hr THEN, reduce CS or LPCI injection flow into the RPV until the cooldown rate is below 100'F/hr, OR RPV pressure lowers to within 50 psig of suppression chahiber pressure; whichever occurs first.

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l 3.7 Control suppression pool temperature to maintain RPV water temperature above 70*F.

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3.8 GO TO cold shutdown OP 206 "Plant Cooldown to Cold Shutdown".

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FINAL i O I

i 20P 579 Alternate ; hut Go.n ;aoling i

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