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Forwards Slides from 890616 Meeting Re CESSAR-DC Baseline PRA for Sys 80+ Std Design Described in SAR on Design Certification
	ML20246B874
Person / Time
Site:	05000470
Issue date:	08/17/1989
From:	Scherer A; ABB COMBUSTION ENGINEERING NUCLEAR FUEL (FORMERLY
To:	Singh R; NRC OFFICE OF INFORMATION RESOURCES MANAGEMENT (IRM), Office of Nuclear Reactor Regulation
References
	LD-89-092, LD-89-92, NUDOCS 8908240047
	Download: ML20246B874 (23)
	v • d • e

__ - _ _ _ _ _ _ _ _ _

.r' COIRBUSTION EINHNEERING August 17, 1989 LD-89-092 Project No. 675 Mr. Rabindra Singh, Project Manager Office of Nuclear Reactor Regulation U. S. Nucle.tr Regulatory Commission Attn: Docunent Control Desk Washington, D. C.

20555

Subject:

CESSAR-DC Baseline PRA

Reference:

Letter, T. J. Kenyon (NRC), to A. E. Scherer (C-E),

dated March 14, 1989

Dear Mr. Singh:

The Reference provided comments on the baseline Probabilistic Risk Assessment (PRA) for the System 80+= Standard Design described in the Combustion Engineering Standard Safety Analysis Report - Design Certification (CESSAR-DC). Those comments were discussed at the June 6,1989, meeting between Nuclear Regulatory Commission staff and its consultants (BNL) and Combustion Engineering. It was agreed that all Nuclear Regulatory Commission comments either have already been addressed or will be addressed in the final PRA analysis. The slides from the June 6,1989, meeting are enclosed.

If you have any further comments or questions on the System 80+

PRA, please contact me or Mr. Ritterbusch of my staff at (203) 285-5206.

Very truly yours, COMBUSTION ENGINEERING, INC.

- _-M%

A. E.

cherer "po3 2-Director Nuclear Licensing AES:Jeb Apo: SI3 f6_"

s

Enclosure:

As Stated A 6'#

Power Systeme 1000 Pror.pect Hill Road (203) 688-1911 Combustion Engincenng, Inc.

Post OHice Box 500 Telen. 99297 Winds r, Connecticut 06095-0500 8908240047 890817 FDR ADOCK 03000470 FDC l

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LARGE LOCA 2.52E-7 HEoIuw LOCA 2.88E-7 SuaLL LOCA 4.33E-8 j

LOSS OF FEEDWATER 3.48E-8 LOSS OF CONDENSER VACUUM 6.71E-9 OTHER TRANSIENTS 1.10E-7 STEAMLINE BREAKS 1.04E-9 S.G. TUBE RUP1VRE 1.68E-7 LOSS oF OFFSITE POWER 4.42E-7 ATWS 2.14E-7**

LOSS oF CCW/SW 3.98E-8 LOSS OF 125 VDC BUS 5.00E-8**

INTERFACING SYSTEM LOCA 1.00E-7**

TOTAL 1.75E-6 No RECOVERY ESTIMATED BY1fl h

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SYSTEM 80+ PRA OVERALL CORE DAMAGE FREQUENCY INTERNAL EVENTS 1.75E-6 t

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LD-89-092, Forwards Slides from 890616 Meeting Re CESSAR-DC Baseline PRA for Sys 80+ Std Design Described in SAR on Design Certification

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Text

Subject:

Reference:

Dear Mr. Singh:

Enclosure:

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LD-89-092, Forwards Slides from 890616 Meeting Re CESSAR-DC Baseline PRA for Sys 80+ Std Design Described in SAR on Design Certification

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Subject:

Reference:

Dear Mr. Singh:

Enclosure:

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