ML20211P175

Forwards Request for Addl Info Re RESAR-SP/90 Module 16 to Support back-end PRA Analysis.Info Requested within 30 Days of Ltr Date

ML20211P175
Person / Time
Site:	05000601
Issue date:	07/11/1986
From:	Long S Office of Nuclear Reactor Regulation
To:	Rahe E WESTINGHOUSE ELECTRIC COMPANY, DIV OF CBS CORP.
References
NUDOCS 8607230027
Download: ML20211P175 (3)

Text

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11 JUL W STN 50-601 Mr. E. P. Rahe, Jr., Manager Nuclear Safety Department Westinghouse Electric Corporation Water Reactor Divisions, Box 355 Pittsburgh, Pennsylvania 15230

SUBJECT:

WESTINGPOUSE ADVANCED PRESSURIZED WATER REACTOR (WAPWR),

RESAR-SP/90, REVIEW 0F MODULE 16 We are continuing our review of the RESAR-SP/90 Module 16, and have identified the need for additional information to support our back-end PRA analysis.

You are requested to provide your response to the questions identified in the enclosure within 30 days of the date of this letter. If additional information pertaining to other sections of Module 16 is needed, we will notify you promptly.

Sincerely, Steven M. l.ong, Project Manager PWR Project Directorate #5 Division of PWR I.icensing-A

Enclosure:

As stated cc: See next page Distribution

-Docket: Files I.ocal PDR NRC POR PD#5 R/F T. Novak OEl.D J. Partlow

8. Grimes E. Jordan ACRS (10)

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8607230027 860711 PDR ADOCK 05000601 A PDR

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11 JUL 586 Docket No. STN 50-601 .

Mr. E. P. Rahe, Jr., Manager Nuclear Safety Department Westinghouse Electric Corporation Water Reactor Divisions, Box 355 Pittsburgh, Pennsylvania 15230

SUBJECT:

WESTINGHOUSE ADVANCED PRESSURIZED WATER REACTOR (WAPWR),

RESAR-SP/90, REVIEW 0F MODULE 16 We are continuing our review of the RESAR-SP/90 Module 16, and have identified the need for additional information to support our back-end PRA analysis.

You are requested to provide your response to the questions identified in the enclosure.within 30 days of the date of this letter. If additional

- irformation pertaining to other sections of Module 16 is needed, we will notify you promptly. ~

Sincerely, 0/

1. ~$ ~ ..

Steven M. Long, Pr ject Manager PWR Project Directorate #5 Division of PWR licensing-A

Enclosure:

As stated cc: See next page

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Enclosure .

QUESTIONS RESULTING FROM REVIEW OF RESAR-SP/90, MODULE 15, VOLUMES 3&4 ,

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i A. SP/90 TRAPMERGE RELATED DESIGN DATA NEEDS 720.36 The following data are needed for:

1. Hot-Leg (between the RV outlet and the pressurizer)

2. Surge line

3. Pressurizer and relief line Data Needed:

gas volume, volume height, flow area, mass times specific heat, wall thickness, settling area, surface area oriented horizontally and vertically.

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720.37 The following additional data are needed for:

1. Core plate (upper)

2. Tubes and columns in upper plenum

3. Support casting in upper plenum

4. Core' barrel Data Needed mass times specific heat, flow hydraulic diameter for the above structures, flow area in the proximity of the structure, length (along the flow path), wall thickness, surface area, settling area.

B. C-MATRIX 720.38 '

If available, provide copies of containment event trees or the C-matrix used by Westinghouse in its assessment of the SP/90 containment for severe accident loadings.

If you have any questions regarding this request, please call Dr. Ji-Wu Yang at Brookhaven National Laboratory at phone number (516) 282-2616.

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