ML19297A101

Comments on Facility Response to NRC 800310 Info Request Re Basis for Auxiliary Feedwater Sys Flow Requirements. Auxiliary Feedwater Sys Must Have Capacity to Supply at Least 380 Gpm Total

ML19297A101
Person / Time
Site:	05000000, Summer
Issue date:	09/30/1980
From:	Speis T Office of Nuclear Reactor Regulation
To:	Parr O Office of Nuclear Reactor Regulation
Shared Package
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References
FOIA-80-515, FOIA-80-555 NUDOCS 8010230527
Download: ML19297A101 (1)

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s RiGUJtIORY DOCE' RE C0dY SEP 3 01950 Docket flo:

50-395 f1Ef!0RA!!DUM FOR: Olan Parr, Chief, Auxiliary Systems Branch, DSI FROM:

Themis P. Spets, Chief, Reactor Systems Branch, DSI

SUBJECT:

AF'1 FLOW REOUIREMEfiTS FOR SUfNER NUCLEAR STATI0ti Reactor Systems Branch has revi:wed responses by the Virgil C. Sumer Nuclear Station to the tiRC infomation request of March 10,1980, " Basis for Auxiliary Feedwater System Flow Requirements." Our cornents are as follows:

1.

The auxiliary feedwatee system must have a capacity to supply at least 330 callons per minute total (to the steam generators to meet referenced analyses' assumptions).

2.

The above auxiliary feedwater capacity must be supplied to at least two steam generators (in order to provide adequate heat transfer area).

3.

The auxiliary feedwater system must be guaranteed to satisfy requirements numbers 1 and 2 for an initiating event plus Auxiliary Systems Branch failure criteria for auxiliary feedwater systems.

4.

Reactor Systems Branch considerations impose no upper bound for maximum auxiliary feedwater flow rates permissible for these plants; however, a bound may be set based on another branch's Branch criteria, for example, Containment Systems Branch. Containment Systems may be consulted to verify maximum permissible auxiliary feedwater flow rate.

yg6al'slFedN Themis P. Speis, Chief Reactor Systems Branch Division' of Systems Integration cc:

F. Orr W. Butler B. Sheron R. W. Houston D. Ross J. Wemiel G. Mazetis A. Gill V. Leung M. Rubin P. Check L. Huang Duo 527

Contact:

F. Orr ih Axt. 27591 RSB:DSI A NkDSI RSBl$I7'

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