ML19329D647

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Forwards Gilbert & Associates Analytical Model, Borated Water Storage Tank Drawdown Transient Analysis, Revision 1. W/O Encl
ML19329D647
Person / Time
Site: Crystal River Duke Energy icon.png
Issue date: 03/16/1976
From: Rodgers J
FLORIDA POWER CORP.
To: Darrin Butler
Office of Nuclear Reactor Regulation
References
NUDOCS 8003160271
Download: ML19329D647 (3)


Text

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DATE RECEIVED

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' :.,. ' ' IE;g Dr. D. A. Butler, Chief () (,'. %! ,

Light Water Reactors Branch #4 Director of Nuclear Reactor Regulation 'e'/i-u.S. Nuclear Regulatory Commission ' O ~~

Washington, D. C. 20555 ,

In Re: Florida Power Corporation Crystal River Unit #3 Docket No. 50-302

Dear Dr. Butler:

We enclose 20 copies of Gilbert Associates Analytical Model -

Borated Water Storage Tank Drawdown Transient Analysis, Revision 1.

This analysis has been applied to Crystal River Unit #3 system design and verified during the recently run Borated Water Storage Tank Drawdown Test.

The BWST drawdown test is not a design basis test. It should be noted that the physical (actual) dwdown test was con-ducted with demineralized water and tc.t actual LOCA conditions did not exist. Therefore, the function of the physical draw-down test was solely to verify an analytical model. This model

. was then used to evaluate the design basis operation of the tank drawdown. Replacement of stop check valves BSV-9, 10, 67 and 68 with swing check valves does not invalidate the analytical model because of the predictability of valve pro-perties by industry standardo.

A drawdown retest would again give indication of water hydraulics only and would not demonstrate the adequacy of the system relative to design conditions. Regardless of physical drawdown results utilizing water, the requirement

to validate the FSAR can be accomplish 2d only with the pre-viously verified analytical model.

_b9' General Office 3201 inirty.fourin street soutn . P O Box 14042. st Petersburg Florca 33733 813-666-5151

Dr. D. - A. Butler March 16, 1976 We'would appreciate your acceptance of this Analysis and the previously run drawdown test as adequate to demonstrate system performance.

Very truly yours, J. T. Rodgers Asst. Vice President

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