ML19276J691

Comments on Util Response to 800310 Request for Info Re Auxiliary Feedwater Flow Requirements.Auxiliary Feedwater Sys Must Satisfy Flow Requirements for Appropriate Initiating Event

ML19276J691
Person / Time
Site:	05000000, North Anna
Issue date:	07/24/1980
From:	Speis T Office of Nuclear Reactor Regulation
To:	Parr O Office of Nuclear Reactor Regulation
Shared Package
ML093450149	List: ML13319A698 ML14190A386 ML14190A407 ML14190A410 ML15260A018 ML16245A451 ML16245A464 ML16245A519 ML16340B230 ML17208A670 ML17208A671 ML17319A601 ML17340A460 ML18044A564 ML18044A670 ML18044A671 ML18082A762 ML18082A870 ML18082B237 ML18085A271 ML18139A593 ML18139A594 ML19207B142 ML19208A323 ML19254G983 ML19254H090 ML19254H091 ML19262E717 ML19264A126 ML19264B199 ML19271A912 ML19273C792 ML19273D125 ML19275E724 ML19275E727 ML19276J691 ML19281C520 ML19290G036 ML19290G038 ML19294C656 ML19294C857 ML19295B828 ML19295B969 ML19295D087 ML19295D182 ML19295E448 ML19295E739 ML19296E856 ML19296F114 ML19297A101 ... further results
References
FOIA-80-515, FOIA-80-555 NUDOCS 8008130665
Download: ML19276J691 (2)

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Olan Parr, Chief, Auxiliary Systems Branch, DSI FRC f:

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

SUBJECT:

liORTH ANilA 2 - AF'cl FLCU REQUIREME.'iTS The.eactor Systems Branch has reviewed the response by I' orth Anna 2 to the URC information request of March 10, 1980 relating to the basis for auxiliary feedwater flow requirements. Our comments are as follows:

1.

The auxiliary feedwater system must have a capacity to supply 0 3 gallons per minute total to two steam generators following a loss of feedwater event (station blackout).

2.

The auxiliary feedwater system must have a capacity to supply 240 gallons per minute to one steam generator following a feedwater line break event.

The licensing analysis assumes operator action after 30 minutes to properly distribute a flow of cCO gallons per minute to tuo steam generators.

3.

The auxiliary feedwater systen must be guaranteed to satisfy the flow requirements listed in items 1 & 2 above for the acprocriate initiating event considering the Auxiliary Systems Sranch failure criteria for the auxiliary feedwater system.

4.

The Reactor Systems Branch considerations impose no upper bound for maxinum permissible auxiliary feedwater flow rate for this plant; however, an upper limit may be set based upon another branch's criteria, for example, Containment Systems Branch. Containment Systems Branch may be consulted to verify maximum permissible auxiliary feedwater flow rate.

Themis P. Speis, Chief Reactor Systems Branch Division of Systems Integration C0ilTACT:

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