ML20153B128

Forwards Request for Addl Info Re Amend B of Chapters 4 & 5 of CESSAR-DC,Sys 80+,transmitted by .Receipt of Info within 90 Days of Ltr Date Requested

ML20153B128
Person / Time
Site:	05000470
Issue date:	06/28/1988
From:	Vissing G Office of Nuclear Reactor Regulation
To:	Scherer A ABB COMBUSTION ENGINEERING NUCLEAR FUEL (FORMERLY
References
PROJECT-675A NUDOCS 8807120716
Download: ML20153B128 (4)

Text

os June 28, 1988 Project No. 675 Mr. A. E. Scherer, Director Nuclear Licensing Combustion Engineering 1000 Prospect Hill Road Post O'fice Box 500 Windsor, Connecticut 06095-0500

SUBJECT:

RE0 VEST FOR ADDITIONAL INFORMATION CONCERNING CHAPTER 4, CESSAR-DC, SYSTEM 80+, REACTOR SYSTEMS BRANCH Our Reactor Systems Branch has reviewed Amendment B of Chapters 4 and 5 of CESSAR-DC, System 80+, transmitted by your letter dated April 11, 1988 and has identified the need for additional information. The enclosed Request for Additional Information describes the needed information. Our schedule calls for the information to be received within 90 days from the date of this letter.

Sincerely, original signed by Guy.S. Vissing, Project Manager l

Standardization and Non-Power l

Reactor Project Directorate Division of Reactor Projects III, IV, V and Special Projects Office of Nuclear Reactor Regulation

Enclosure:

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June 28, 1988 Project No. 675 Mr. A. E. Scherer, Director Nuclear Licensing Combustion Engineering 1000 Prospect Hill Road Post Office Box 500 Windsor, Connecticut 06095-0500

SUBJECT:

REQUEST FOR ADDITIONAL INFORMATION CONCERNING CHAPTER 4, CESSAR-DC, SYSTEM 80+, REACTOR SYSTEMS BRANCH Our Reactor Systems Branch has reviewed Amendment B of Chapters 4 and 5 of CESSAR-DC, System 80+, transmitted by your letter dated April 11, 1988 and has identified the need for additional information. The enclosed Request far Additional Information describes the needed information. Our schedule calls for the information to be received within 90 days from the date of this letter.

Sincerely, Y

Gu

. Vissing, roject Manager Standardization and Non-Power Reactor Project Directorate Division of Reactor Projects III, IV, V and Special Projects Office of Nuclear Reactor Regulation

Enclosure:

As stated cc: See next page 1

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Combustion Engineering, Inc.

Project No. 675 Advanced CESSAR cc: Mr. C. B. Brinkman, Manager Washington Nuclear Operations Combustion Engineering, Inc.

7910 Woodmont Avenue, Suite 1310 Bethesda, Maryland 20814 Dr. Michael Green Manager of Licensing Combustion Engineering 1000 Prospect Hill Road Post Office Box 500 llindsor, Connecticut 06095-0500

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REQUEST FOR ADDITIONAL INFORilATION CONCERNING REACTOR SYSTEMS BRANCH REVIEW OF AMENDMENT B 0F CHAPTERS 4 AND 5 COMBUSTION ENGINEERING CESSAR-DC, SYSTEM 80+

PROJECT NO. 675 440.1 - The use of the VISIONS code in the analysis of load follow transients appears to be a change from previously approved methodology. Has VISIONS been submitted and reviewed by the NRC? How has it been qualified for use in safety and analyses?

440.2 - Verification of the adequacy of the CEAs to meet the required 4.0

'second 90% insertion scram time has been determined by testing in the C-E TF-2 flow test facility.

In view of the recently observed longer scram times in ANO-2 when testing the simultaneous tripping of all CEAs compared to individual CEAs, describe how this testing was performed and any anticipated I

changes to the test procedure.

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