ML20205F471

Requests Sufficient Info to Establish That Auxiliary Pressurizer Spray Sys for CESSAR Sys 80 & Associated Water Supply Sys Safety Grade

ML20205F471
Person / Time
Site:	05000470
Issue date:	03/24/1987
From:	Knighton G Office of Nuclear Reactor Regulation
To:	Scherer A ABB COMBUSTION ENGINEERING NUCLEAR FUEL (FORMERLY
References
NUDOCS 8703310169
Download: ML20205F471 (3)

Text

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\.....* MAF.24(Sg Mr. A. E. Scherer. Director Nuclear Licensing Combustion Engineering, Inc.

P.O. Box 500 Windsor, Connecticut 06C95-0500

SUBJECT:

AUXILIARY PRESSURIZER SPRAY SYSTEM FOR CESSAR SYSTEM EO

REFERENCES:

(1) CE letter, A. E. Scherer to F. J. Miraclia, dated ~

February 6,1987 (2) NRC letter, H. L. Thompson to A. E. Scherer, dated October 29, 1985 We have reviewed your response (Reference 1) to the NRC letter (Reference 2) requesting information concerning the design of the Auxiliary Pressurizer Spray System (APSS) for CESSAR System 80. The information was requested as a result of potential design deficiencies identified during an event on September 12, 1985, at the lea 6 CESSAR System 80 plant.

Based on that review, we find that although certain design improvements have been proposed for the APSS, you have provided insufficient information for determining whether the APSS, as modified, is a safety-grade system. Since your response states that mitigation of the postulated Steam Generator Tube Rupture (SGTR) accident relies on the APSS, we require that the APSS be designed as safety-grade in order for you to take credit for its availability in the SGTI analysis.

Therefore, in order for us to complete our review of this specific issue, as well as our review of your request for forward referenceability of CESSAR System 80, we request that you provide sufficient information to establish that the APSS and its associated water supply system are safety-grade. This information should include, but not be limited to, all valves, piping, and wiring instrumentation from the APSS water source to and through the spray nozzles, and the interfaces. By establishing that the APSS and the associated water supply system are safety-grade, the system will fulfill the requirements of Branch Technical Position RSB 5-1 for Class 1 plants and, thus, CESSAR will be forward referenceable with respect to the APSS.

8703310169 870324 0 PDR ADOCK 0500

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_ Combustion Engineering, Inc.

Docket No. STN 50-470 (CESSAR) cc w/o enclosure: ,

Mr. G. Davis, Manager Standard Plant Licensing 1000 Prospect Hill Road

, Windsor, Connecticut 06095 Mr. C. B. Brinkman, Manager Washington Nuclear Operations Combustion Engineering, Inc.

7910 Woodmont Avenue Bethesda, Paryland 20014 Mr. E. E. Van Brunt, Jr.

Vice President - Construction Projects Arizona Public Service Company

, P. O. Box 21666 Phoenix, Arizona 85036

, Ms. Patricia Lee Hourihan 6413 S. 26th Street Phoenix, Arizona 85040 Mr. Daniel F. Giessing Division of Nuclear Regulation and Safety Office of Converter Reactor Deployment, NE-12 Office of Nuclear Energy Washington, D.C. 20545 Mr. Douglas Coleman 1.fcensing Project Manager Washington Public Power Supply System P. O. Box 1223 Elma, Washington 98541 9

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.- l 6 I Mr. Scherer i We ask that you provide a timely response to this letter. If you have any l questions regarding the request, you can contact Mr. Emanuel Licitra on (301) l' 492-8599 or Mr. James J. Raleigh on (301) 492-4679 of my staff.

Sincerely, 4

5 George W. Knighton, Director PWR Project Directorate No. 7 Division of PWR Licensing-B cc: See next page DISTRIBUTION:

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