ML20205A258

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Rev 2 to Emergency Operating Procedure EOP 574, Reactor Pressure Vessel Steam Cooling Emergency Procedure
ML20205A258
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-574, NUDOCS 8810250440
Download: ML20205A258 (4)
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Text

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l

' i RPV Steam Cooitog E0P 574 Page 1 '

, Rev. E ,

Unit 1 RPV Steam Cooling Emergency Procedure PAGE NO. EFF. REV. 9

. 1-2 2 -

2a 2 l :'.

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En. .(OP 576 "RPV Level 6 storstion" steo 3.7.5 r

Confirs Initiation of TC (stablish steam cooliry 1r If IC Can't Be inittetedt 9

Open one SRV Estaelish steam cooling O 9 - 220" Cepressurite 9 700 psig Increase fuel temperatures Maintain PCT < 2200'F E0P 577 Emergwy RPY Depressurization 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, Att':hment A O

iCP 274 IPV ;mm .;aling 0010250440 001007 PDR ADOCK 05000213 p PDR

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RPV Stoam Cooling E0P 574 Page 2a  ; l Rev. 2 '

l CONDITIONS REQUIRING EMERGENCY RPV OEPRES$URIZATION Gl I A. Containment Control (EOP 580)

1. If Suppression Pool temperature and RPV pressure cannot be restored and maintained below the Heat Capacity Temperature Limit.
2. If Drywell temperature cannot be maintained below 281 F.
3. If Drywell pressure exceeds 15 psig.
4. If Suppression Pool water level cannot be maintai~ned above the Heat Capacity Level Limit. .
5. If Suppression Pool water level and RPV pressure cannot be restored and maintained below the Suppression Pool Load Limit.
8. RPV Level Restoration (EOP 576)
1. If RPV water level is < -127" and rising, RPV pressure . 330 psig, and Condensate /Feedwater is not available.
2. If RPV water level is rising, and RPV pressare < 330 psig and rising.
3. If RPV uater level is lowering, RPV pressure > 330 psig, and at least two normal injection subsystems are lined-up for injection with pumps running.
4. If RPV water level is lowering and approaches -127", RPV pressurc > 330 psig, and any system, cr normal injection subsystem, or alterante injection subsystem i:, lined-up with at least one pump running.
5. If RPV water level- is lowering and RPV pre';sure < 330 psig and rising.

C. RPV Level /Rx Power (EOP 575)

1. If RPV water level cannot be maintained above -127" (TAF).
2. After 270 pounds of Boron have been injected or all control rods are inserted beyond position 04, if RPV water level cannot S.I be maintained above -127" (TAF).

O (OP 574 JPV tteam :coling

i RPV Steam Cooling E0P 574 Page 2 i Rev. 2

}

1. PURPOSE The purpose of this procedure is to minimize core heatup and provide i additional time for re-establishing a makeup source of water if RPV -

water level is less than -127" (TAF) ar.d no system, injection '

subsystem, or alternate subsystem is lined up with at least one pump running.

2. ENTRY CONDITIONS .

2.1 This procedure is entered from E0P 576 "RPV Level Restoration" if RPV water level drops below -127" (TAF), and no system, injection subsystem, or alternate injection subsystem is lined up with at least one pump running.

3. OPERATOR ACTIONS While executing the following steps:

E Emergency Depressurization is required, OR E any system,. injection subsystem, or alternate injection subsystem is lined-up for injection with at least one pump O running, ,

THEN GO TO E0P 577 "Emergency RPV Depressurization".

NOTE

, For Hydrogen /0xygen control following a LOCA, refer to section 7.6 of OP 311.

3.1 Confirm initiation of Isolation Condenser.

3.2 E the Isolation Condenser cannot be initiated:

WHEN RPV water level drops to -220" OR, IF, F RPV water level cannot be determined, THEN cpen one SRV

_ 3. 2.1 WHEN RPV pressure drops below 700 psig, i THEN GO TO E0P 577 "Emergency RPV Depressurization".

FINAL E0P 574 RPV Steam Cooling

STATION PROCEDURE COVER SHEET A. IDENTIFICATION Number: E0P 574 Rev. 2 l

Title:

RPV STEAM COOLING EMERGENCY PROCEDURE 2 Prepared By: R. KRAEMER B. REVIEW I have reviewed the above procedure and have found it to be satisfactory.

TITLE SIGNATURE DATE DEPARTMENT HEA0 d.0 , wi II.2a /3 3 Justw TPL - 16Ar

/ < t C. SPECIFIC UNREVIEWED SAFETY QUESTION EVALUATION REQUIRED:

Modifies intent of procedure and changes operation of systems as described in design documents. YES ( ) NO (

(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 (Adverse environmental impact) YES ( ) NO (Q

0. 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 [ ]

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

E. INTEGRATED SAFETY SVALUATION REQUIRED YES [ [ NO [ ]

F. PROCEDURE REQUIRES PORC/50RC REVIEW (In addition to review, items with a YES response must be documented in the PORC/SORC meeting minutes.) YES [ NO [ ]

G. POR /50RC APPROVAL SORC Meeting Number /- 88 -Y H, APPROVAL AND IMPLEMENTATION The attached procedure is hereby approved, and effective on the date below:

& nt S ta Wut/ Se r0 i ck/Un i t S up e r i n t e nde n t cho/88 Effective Date l

CF101/9/s/SES/87-12/lof1

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