ML20129K372

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Forwards Request for Additional Info Re Degraded Voltage Setpoint Change & Other Related TS Changes for Plant
ML20129K372
Person / Time
Site: Clinton Constellation icon.png
Issue date: 11/20/1996
From: Pickett D
NRC (Affiliation Not Assigned)
To: Telthorst P
ILLINOIS POWER CO.
References
TAC-M94886, NUDOCS 9611220129
Download: ML20129K372 (4)


Text

_ _ _

November 20, 1996 l 1

l Mr. Paul J. Telthorst QISTRIBUTION:

Director - Licensing Docket File OGC Clinton Power Station PUBLIC JCaldwell, RIII P. O. Box 678 PDIII-3 r/f ACRS Mail Code V920 JRoe JCalvo Clinton, IL 61727 GMarcu:: EAdensam(E)

SUBJECT:

REQUEST FOR ADDITIONAL INFORMATION ON DEGRADED V0LTAGE SETP0 INT CHANGE AND OTHER RELATED TECHNICAL SPECIFICATION CHANGES - CLINTON 4 POWER STATION (TAC No. M94886) l

Dear Mr. Telthorst:

l' By letter dated February 22, 1996 (U-602554), Illinois Power Company proposed an amendment to the Clinton Power Station Technical Specifications to revise the setpoint of the degraded voltage protection, and modify or delete other Loss of Power Instrumentation Technical Specifications. Followup letters on this subject were also submitted on July 24, October 4, and November 19, 1996.

In order to facilitate the staff's review of your submittal, the attached infm tion is requested. These questions were previously provided to you and ha,  :. ten discussed with the staff. If you have any questions, please contact me .. (301) 415-1364.

Sincerely, i Original signed by:

Douglas V. Pickett, Project Manager Project Directorate III-3 Division of Reactor Projects III/IV Office of Nuclear Reactor Regulation Docket No. 50-461

Enclosure:

As stated cc w/ encl: See next page DOCUMENT NAME: G:\CLINTON\CLI94886.RAI To receive a copy of this document, indicate in the box: "C" = Copy without enclosures "E" = Copy with enclosures "N* = No copy 0FFICE LA:PDIII-3 l6 PM:PDILI4 l h BC:EELB , v l

/

NAME DFoster-CurfMn. DPicket't' JCalvo DATE 11/40/96 /pk C 11/20/96 11/2o/96 l J OFFICIAL RECORD COPY

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96112i26i29 961120 DR ADOCK0500g1

l- November 20, 1996 Mr. Paul J. Telthorst DISTRIBUTION:

Director - Licensing Docket File OGC l Clinton Power Station PUBLIC JCaldwell, RIII l P. 0. Box 678 PDIII-3 r/f ACRS Mail Code V920 JRoe JCalvo Clinton, IL 61727 GMarcus EAdensam(E) l i

SUBJECT:

REQUEST FOR ADDITIONAL INFORMATION ON DEGRADED VOLTAGE SETPOINT CHANGE AND OTHER RELATED TECHNICAL SPECIFICATION CHANGES - CLINTON POWER STATION (TAC No. M94886)

Dear Mr. Telthorst:

By letter dated February 22, 1996 (U-602554), Illinois Power Company proposed an amendment to the Clinton Power Station Technical Specifications to revise the setpoint of the degraded voltage protection, and modify or delete other Loss of Power Instrumentation Technical Specifications. Followup letters on this subject were also submitted on July 24, October 4, and November 19, 1996.

In crder to facilitate the staff's review of your submittal, the attached information is requested. These questions were previously provided to you and .

have been discussed with the staff. If you have any questions, please contact  ;

me at (301) 415-1364. l Sincerely, Original signed by:

Douglas V. Pickett, Project Manager Project Directorate III-3 Division of Reactor Projects III/IV Office of Nuclear Reactor Regulation Docket No. 50-461

Enclosure:

As' stated cc w/ encl: See next page l

DOCUMENT NAME: G:\CLINTON\CLI94886.RAI l To ,oceive e ospy of this document, indeete in the box: *C' = Copy without enclosures *E' = Copy with enclosures "N* = No copy 0FFICE LA:PDIII-3 l@ PM:PDLIJ-S l 6 BC:EELB , u JCalvo /~

! NAME DFoster-Curshn. DPicket't' l DATE 11/J0/96 /f+11/ 10/96 II/2u/96

) 0FFICIAL RECORD COPY l

l a

l Mr. Paul J. Telthorst Clinton Power Station Illinois Power Company Unit No. I cc:

Mr. Wilfred Connell Illinois Department Vice President of Nuclear Safety Clinton Power Station Office of Nuclear Facility Safety Post Office Box 678 1035 Outer Park Drive ,

Clinton, Illinois 61727 Springfield, Illinois 62704 l Mr. Daniel P. Thompson j Manager Nuclear Station i Engineering Department  !

Clinton Power Station l Post Office Box 678 Clinton, Illinois 61727 Resident Inspector .

U.S. Nuclear Regulatory Commission l RR#3, Box 229 A Clinton, Illinois 61727 Mr. R. T. Hill

, Licensing Services Manager

! General Electric Company 175 Curtner Avenue, M/C 481 San Jose, California 95125 l

Regional Administrator, Region III I U.S. Nuclear Regulatory Commission l 801 Warrenville Road j Lisle, Illinois 60532-4351 Chairman of DeWitt County c/o County Clerk's Office

, DeWitt County Courthouse l Clinton, Illinois 61727 l t

i Mr. J. W. Blattner i

Project Manager Sargent & Lundy Engineers 55 East Monroe Street l Chicago, Illinois 60603 l

4 i .

~

h

EEQUEST FOR ADDITIONAL INFORMATION RELATED TO THE CLINTON POWER STATION. UNIT NO. 1 DEGRADED VOLTAGE SETPOINT CHANGE DOCKET NO. 50-461 l

l

1. In Attachment 7 to Illinois Power Company (IP) letter dated October 4, 1996, a Sargent and Lundy letter is furnished that provides information l on a comparison of some analytical models to data provided by IP. Are j l these the same analytical models used in the recent revision of Clinton '

! Power Station calculation 19-AQ-02? The staff notes.that the Sargent I and Lundy letter is dated June 23, 1986; whereas, Clinton LER 94-005-00 indicates that IP developed a new LOCA block-start voltage model and transient calculation in 1991. Please clarify. )

l 2. Discuss the validation of the model(s) used in the most recent analysis of equipment operation and electrical system voltages for the LOCA block start scenario on the offsite power system. The discussion should demonstrate that the model provides a true and accurate representation of the system and equipment performance during the scenario, including but not necessarily limited to:

Multiple simultaneous and/or sequential motor starts of various size

! motors with differing acceleration rates, electrical characteristics, and mechanical characteristics at all system voltage levels.

Motors that are in a stalled condition for som period of time  ;

during scenario analyzed.

Low voltage conditions seen during the scenario analyzed.

l Enclosure l

l