ML19338C755

Disagrees W/Util Plan to Shut Off Recirculation Flow as Interim Fix Re Low Flow from Auxiliary Feed Pump 1-FW-P-3B Discussed in LER 80-061/01T-0.Recirculation Flow Path Should Be Retained to Protect Pump

ML19338C755
Person / Time
Site:	North Anna
Issue date:	08/04/1980
From:	Check P Office of Nuclear Reactor Regulation
To:	Novak T Office of Nuclear Reactor Regulation
References
NUDOCS 8009050026
Download: ML19338C755 (1)

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DOCKET FILE AUG 4 1c80 PDR ASB RE.1DItlG PCheck Docket No:

50-338 MEMORA;iDLN FOR: Thomas M. Novak Assistant Director for Operating Reactors, CL FROM:

Paul S. Check, Assistant Director for Plant Systems, DSI

SUBJECT:

C0mEif75 ON LER 80-061[0IT-0 DATED JUI.Y 17, 1930, 140RTH A.'l?tA UilIT 1 The subject LER discusses low flow from Auxiliary Feed Dumo 1-R-P-38.

An analysis indicates the pump may only reach 335 gpm (5 gem or 1-1/2t below the design point). The licensee recorinended shutting off the recirculation flow as an interim fix until the cause of the low flow is ascertained.

He do not agree with the licensee's pmposed course of action; the recircu-lation ficw path s.culd be etained to protect the pump. We understand that the licensee's analysis is based entirely on system head loss calculations.

.Such analyses usually pmdict higner lossestthan those measured in actual tes ts. We discussed this subject with Mr. R. W. Calder of VEPCO. !1r.

- Calder statad that AEi pumc tests would be conducted in a matter of weeks at whicn time the actual filw would be detamined.

We recommend that the pump protection provided by the recirculation flow oe retained. We will accept the 1-1/2% flow uncertainty for the short period until the pucp tests are conducted. Should the low flow condition persist, further action will be mquired wnen the test infonnation is riail-able.

original signed bz p g s. chech Paul S. Check, Assistant Director for Plant Systans Division of Systems Integration ec:

J. O'Reilly. Region II T. Speis V. Stallo, IE C. Berlinger N. Haller, MP.A B. Youngblood R. Calder, VEPCO

0. Parr D. Eisenhut L. Engle D. Ross A. Dromerick R. Tedesco H. Holz M

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