ML18082A762

Submits Comments on Util Response to NRC 790921 Request Re Basis for Auxiliary Feedwater Sys Flow Requirements. Auxiliary Feedwater Sys Must Have Capacity to Supply at Least 440 Gallons Per Minute Total

ML18082A762
Person / Time
Site:	Salem, Sequoyah, 05000000
Issue date:	07/11/1980
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 8007230098
Download: ML18082A762 (1)

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I Docket Nos:

50-272, 50-311, 50-327' 50-328 MEMORANDUM FOR:

Olan Parr, Cnief, Auxiliary Systems Branch, OSI FROM:

Themis P.

Speis~ Chief, Reactor Systems Branch, OSI

SUBJECT:

AFW FLOW REQUIREMENTS FOR SALEM AND SEQUOYAH Reactor.Systems Branch has reviewed responses.by Salem, Units 1 and 2, and S~quoyah, Units 1 and 2, to the. NRG information request of September 21, 1979, "Basis for Auxiliary Feedwater System Flow Requirements.

11 Our comments are as follows:

1.

The auxiliary feedwater system must have a capacity to supply at least 440 gallons 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 provtcle adequate heat transfer area).

3.

The aux*il iary feedwater system must be g~arariteed to satisfy requirements inumbers 1 and 2 for an initiating ~tv.ent pl us Auxiliary Systems Branch failure Griteria for auxiliary feedwater systems"

4.

The licensing ana.1yses (feedwater 1 ine break) assume operator action at 10 minutes to properly distribute auxiliary feedwater flow.

Auxiliary Systems Branch should determine the acceptability of this assumed time for

• operator actions to assure adequ*ate aux*il iary feedwater system performance following a feedwater 1 ine break event.

5.

Reactor Systems Branch considerations impose no upper bound for maximum auxiliary feedwater. flow rates permissible for these plants; however, a bound may be set /lD~ased on a1nother branch's Branch criteria 7 for example, Containment Systems Branch.

Containment Systems may be consulted to-verify maximum* penrnissible auxiliary feedwater flow rate.

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

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