ML19296B775

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Responds to NRC 791218 Ltr Requesting Justification for Correlation of Reactor Coolant Pump Current/Power,Void Fraction & Setpoint,Per Proposed Tesing in IE Bulletin 79-05C.Preliminary Review Will Be Completed by 800229
ML19296B775
Person / Time
Site: Arkansas Nuclear Entergy icon.png
Issue date: 02/11/1980
From: Trimble D
ARKANSAS POWER & LIGHT CO.
To: Reid R
Office of Nuclear Reactor Regulation
References
IEB-79-05C, IEB-79-5C, NUDOCS 8002210489
Download: ML19296B775 (1)


Text

AAKANSAS POWER & LIGHT COMPANY POST OFFICE BOX 551 LITTLE ROCK, ARKANSAS 72203 (501) 371-4000 February 11, 1980 1-020-03 Director of Nuclear Reactor Regulation ATTN: Mr. Robert W. Reid, Chief Division of Operating Reactors Branch #4 U. S. Nuclear Regulatory Connission Washington, D. C. 20555

Subject:

Arkansas Nuclear One-Unit 1 Docket No. 50-313 License No. DPR-51 Automatic Reactor Coolant Pump Trip During Small Break LOCA (File: 1510.1)

Gentlemen:

Your letter, December 18, 1979, provided conceptual approval of a design to trip the reactor coolant pumps automatically using coincident input signals of low RCS pressure and low RCP current / power. This proposed design was required per IE Bulletin 79-05C. In addition, your letter requested extensive . justification for correlation of RCP current / power and void fraction as well as justification for the RCP current / power s etpoi nt.

We have reviewed the scope of work required to address the Staff's concerns and nave determined that a review of other RCP trip designs is desirable prior to initiating any analysis effort requested by the Staff. .

Following this review, which is expected to be completed by February 29, ~

1980, the Staff will be ddvised of the results of the review and our planned followup actions.

Very truly yours, Davi) 0- (

David C. Trimble Manager, Licensing DCT:DGM:tw MEMDE A MOOLE SOUTH UTILITIES SYSTEM QQQ2g} Q g g}