ML20149J721

to Critical Design Characteristics Overcooling Events

ML20149J721
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Site:	Millstone
Issue date:	07/24/1997
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ML20149J719	List: ML20149J717 ML20149J721
References
PROC-970724, NUDOCS 9707290063
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PARSONS POWER Critical Design Characteristics Overcooling Events Millstone 2 Prepared By: .

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Reviewed By: . , v & . Date: 7kfk7 I .

Approved By:

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9707290063 970725 Tier 2 Revision 1 PDR ADOCK 05000336 24 J+, m P PDR

CRITICAL DESIGN CHARACTERISTICS

. OVERCOOLING EVENTS MILIETONE 2 LIST OF EFFECTIVE PAGES Pace No. Revision No. Pare No. Revision No.

I i 1 0 2 0 3 1 4 0 5 0 6 0 7 0 8 0 9 0 10 0 11 0 12 0 13 0 14 0 15 0 16 0

. 17 0 I8 0 19 0 J

- PASSONS P9 WEB -

Tier 2 Revision 1 i 24 My 1997

O 1.3 , Figure 2 shows the systems involved in the mitigation of each analyzed overcooling event.

, l Figure 2: Tier-2 AMSR - Systems Involved in Overcooling Events l 14.1.3 14.1.3 14.1.5 14.1.5 14.1.5 14.1.5 l increase in Increase MSLB MSLB MSLB MSLB Steam in Steam Mode I w/ LOOP Mode 2 w/ LOOP SYSTEM Flow Flow Mode 1 Mode 2 Mode l Mode 3 RPS X X X X X X CEDM X X X X X X RCS X X X X TURB X X X X EHC X X X X MS X X X X X X MFW X X AFW X X X X CVCS X X X X HPSI X X X X ELECT X X X X X X DIST EDG X X

, 1.4 Figure 3 shows the Which Critical Safety Functions have corresponding Critical Design Characteristics 4

for each of the analyzed accidents.

I Figure 3: Tier-2 AMSR - Critical Safety Functions I with CDCs in Overcooling Events 14.1.3 14.1. I 14.1.5 l Increase in Increw.: MSLB Steam Flow in Steam Mode 1 Critical Safety Function Mode 1 Flow (4 Cases)

Mode 3 Reactivity X X X Fuel Integrity X X X RCS Heat Removal X X X RCS Pressure & Inventory *

• X 4

l Containment Integrity & l Radiation Control X

Electrical Power X X Essential Support Systems Environmental Control

• To be determined from detailed analyses 3 Tier 2 Revision 1 24 hdy 1997

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SYMROI OESCRIPTION SIGNALS IDENTIFIES ACTUATION AND CONTROL SIGNALS IMPORTANT TO SYSTEM OPERATION.

SIGNALS MUST ACTUATE ONE OR MORE COMPONENTS TO BE INCLUDEO.

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i IDENTIFIES COMPONENTS SUPPORTING A SAFETY FUNCTION.

COMPONENTS NON SAFETY COMPONENTS MAY BE INCLUDED.

CONTR IDENTIFIES CONTROL ACTIONS SUCH AS INITIATE. CONTROL. ISOLATE. ETC.

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SYSTEM IDENTIFIES SYSTEM OR SUBSYSTEM REQUIRED TO ACHIEVE THE SAFETY FUNCTION.

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PROCESS IDENTIFIES PROCESS OR DESIGN FEATURE REQUIRED TO ACHIEVE THE SAFETY FUN CRIT C AFETY IDENTIFIES THE CRITICAL SAFETY FUNCTION.

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