ML19241A954

Submits Info Requested by NRC Re Control Sys Characteristics for Use in Transient Simulations.Control Sys Characteristics Not Required for Evaluation of Flux & Pressure Response for Turbine Trip Experiments

ML19241A954
Person / Time
Site:	Peach Bottom
Issue date:	06/29/1979
From:	Cook K GENERAL ELECTRIC CO.
To:	Mendonca M Office of Nuclear Reactor Regulation
References
MFN-173-79, NUDOCS 7907110466
Download: ML19241A954 (10)

Text

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' NUCLEAR ENERGY PROJECTS DIVISION GENERAL ELECTRIC COMPANY,17s CURTNER AVE., SAN JOSE, CALIFORNIA 9512s MC 682, (408) 925-5003 MFN-173-79 June 29. 1979 U.S. Nuclear Regulatory Commission Division of Operating Reactors Office of Nuclear Reactor Regulation Washington, D.C. 20555 Attention: Marvin M. Mendonca Gentlemen:

SUBJECT:

TRANSMITTAL OF REQUESTED INFORMATION ON CONTROL SYSTEM SIMULATION FOR TUBINE TRIP TESTS

Reference:

EPRI NP-564, L. A. Carmichael and R. O. Nieni, " Transient and Stability Tests at Peach Bottom Atomic Power Station Unit 2 at End of Cycle 2," June 1978 This letter transmits the information requested by the staff on the Peach Bottom 2 control system characteristics for use in transient simulations. Schematic diagrams are provided fcr tne:

1. Bypass Valve Control System

2. Pressure Control System

3. Feedwater Level Control System

4. M-G Set Speed Controllers In addition, four figures are supplied which describe functional relation-ships in the control system simulations.

The behavior of tho 'urbine control, bypass and stro valve were all reported during the Peach Bottom tests (Reference 1) and hence knowledge of the pressure control system characteristics is not required for test analysis. The reactor water level and feedwater flow were also monitored, Therefore, and provide adequate infomation for the test simulation.

control system characteristics are not required for evaluation of the flux and pressure response for the Peach Bottom turbine trip experiments.

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C F N F R A L [O E LECTRIC USNRC M. M. Mendonca Page 2 May 16, 1979 The diagrams and constants used in the ODYN control system simulations are also provided. The transient simulation is in general not sensitive to these control system col.;tants.

If you have any questions regarding this transmittal, please contact me at (408) 925-5003.

Very truly yours,

() . f60 K. W. Cook, Sr. Licensing Engineer Special Projects Licensing BWR Systems Licensing Safety and Licensing Operation KWC :bj r/ll70-71 Attachments cc: L. 3. Gifford M

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