ML20126E779

Requests Addl Info to Evaluate Acceptability of Proposed Changes to Plant TS to Change from Hench-Levy to Getab/Gexl thermo-hydraulic Limits

ML20126E779
Person / Time
Site:	Monticello
Issue date:	05/15/1975
From:	Stello V Office of Nuclear Reactor Regulation
To:	Goller K Office of Nuclear Reactor Regulation
References
NUDOCS 9212290320
Download: ML20126E779 (2)

Text

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~ 'q DR UNITED STATES NUCLEAR REGULATORY cOMMisslON W ASHINGTON, D. C. 20555 MAY 15 275

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Docket No. 50-263 Karl Goller, Assistant Director for Operating Reactors, RL MONTICELLO - PROPOSED TECH. SPEC. CHANGES TO INCORPORATE GETAB/GEXL (TAR-1516)

Plant Name: Monticello Docket No.: 50-263 Responsible Branch and Project Leader: ORB-2, B. Buckley Technical Review Branch Involved: Reactor Systemt, Review Status: Additional Information Required i

The Monticello technical specification changes required to change i from Hench-Levy to GETAB/GEXL thermo-hydraulic limits have been reviewed by the Reactor Systems Branch. Additional information is required to evaluate _ the acceptability of the changes. The required additional information is identified in the enclosure.

7 Victor Stello, Jr., Assistant Director

• for Reactor Safety

) Division of Technical Review Office of Nuclear Reactor Regulation l l l }'

Enclosure:

R'equest for Additional

Information i

cc: S. Hanauer -

F. Schroeder A. Giambusso W. Mcdonald-D. Ziemann .

B. Buckley-l T. Novak-i W. Hodges 9212290320'750515 PDR -ADOCK 05000263 l

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REQUEST FOR ADDITIONAL INFORMATION:

i- ON MONTICELLO TECH SPEC CHANGES (TAR-1516)

) 1. The APRM flux scram trip setting equation isLthe same as that

given for 7 x 7 geometry using the Hench-Levy CHF correlation.-

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- The APRM trip setting equations should probably be changed to l - be consistent with the;new GEXL/GETAB Analysis < as was- done for =

1 Quad Cities. Either provide the new form with justification i

for its constants or justify retaining the old form and constants

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4 with the new GEXL/GETAB Analysis.

, Also,- the. APRM flux scram trip. setting- equation for the 8 x- 8

'. fuel is different from that given for 7 x 7 fuel. Explain the difference.

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2. Does the relative bundle to bundle power-distribution used in j

! the GETAB statistica1{ analysis for-Monticello remain fixed throughout the analysis? If _ not, how does it ' vary, and why?

If yes, show that the peak radial power-factor used is the maximum obtainable during the cycle.-

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