ML082530321

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Vermont Yankee July 2008 Evidentiary Hearing - Applicant Exhibit E4-39-VY, Checworks v1.0G_Enhancements
ML082530321
Person / Time
Site: Vermont Yankee Entergy icon.png
Issue date: 07/23/2008
From:
Entergy Nuclear Operations, Entergy Nuclear Vermont Yankee
To:
NRC/SECY/RAS
SECY RAS
References
06-849-03-LR, 50-271-LR, Entergy-Applicant-E4-39-VY, RAS M-352
Download: ML082530321 (1)


Text

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CHECWORKS TM FAC Application, Version 1.OG Enhancements The following enhancements have been incorporatedinto FA C v]. OG.. Please review this list to determine what action, if any, you need to take to make effective use of this new version of the software

1. The user can now enter the hydrazine concentration sampled at the Blowdown of recirculating steam generators as an alternate to the Steam Generator Steam Outlet location.

Experience has shown that it is very difficult to obtain an accurate measurement of hydrazine concentration in the steam outlet. To accomplish this, a location selection option "Blowdown" has been added to the "Hydrazine at: SG" drop down window in the PWR Complex Water Treatment data entry form.

2. With Version 1.OF, when the user has entered improper hydrazine concentration values at one or more of the Final Feedwater/Condensate, SG Outlet/Blowdown, or MSR Drain locations and tries to perform an analysis, an error message appears triggered by a hydrazine mass imbalance. This error message only allows the user to abort the analysis so as to correct the input. Version 1.OG has changed the error message, giving the user the additional option of continuing the analysis. In either case the user will then need to correct the hydrazine input concentration values, and rerun the analysis until the imbalance message no longer occurs. See the FAC Version 1.OG User Guide for more details.

3 A new fourth analysis option "NFA--4HBD--+ARD--COMP" is added to the Wear Rate Analysis Run Definition form. This will allow the user to avoid having to zero out operating conditions in the Component Data form when analyzing multiple power levels and wanting to use the operation conditions from the respective Heat Balance Diagrams. With this new option, the FAC Application will retrieve operating conditions in the following order: first in the Network Flow Analysis results (if available), secondly in the Water Chemistry Analysis results for the lines associated to the Heat Balance Diagram, then the data entered in the wear rate run Advanced Run Definition form, and finally data in the component data form. The other three option labels are also changed to be more intuitive. The revised labels are "COMP--HBD--.ARD" (formerly: Ignore NFA Results); NFA--COMP--HBD--ARD" (Formerly: NFA Results 1 st Priority); COMP--NFA" (formerly: User Input 1It Priority).

4. The Chemistry Analysis Report now prints input data with 3 digits after the decimal point.
5. The non-applicable data fields (Valve Coefficient, Valve Size, Orifice Size, etc.) in the Operating Data and Component Size/Acceptance pages of the Component Data entry form are now grayed-out and set to 0.

DOCKETED UsNRC U.S. NUCLEAR REGULATORY COMiu!,S QN August 12, 2008 (11:00am) 1j)the Matter of F AY.,A*JIe. V, '4 Lt OFFICE OF SECRETARY Docket No. 5..0 7-"/. . Official Exhibit No F4- S RULEMAKINGS AND DFFERED by" picant/Lcen ntervenor ADJUDICATIONS STAFF

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