ML20149J721

To Critical Design Characteristics Overcooling Events

ML20149J721
Person / Time
Site:	Millstone
Issue date:	07/24/1997
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ML20149J719	List: ML20149J717 ML20149J721
References
PROC-970724, NUDOCS 9707290063
Download: ML20149J721 (6)

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PARSONS POWER Critical Design Characteristics Overcooling Events Millstone 2 I2[/77 Prepared By:

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

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CRITICAL DESIGN CHARACTERISTICS OVERCOOLING EVENTS MILIETONE 2 LIST OF EFFECTIVE PAGES Pace No.

Revision No.

Pare No.

Revision No.

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- 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 for each of the analyzed accidents.

4 Figure 3: Tier-2 AMSR - Critical Safety Functions 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

X l

RCS Pressure & Inventory 4

Containment Integrity &

Radiation Control Electrical Power X

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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