ML042570465

Request for Additional Information, Completion Time for Required Action A.1 from 24 Hours to 7 Days

ML042570465
Person / Time
Site:	Clinton
Issue date:	09/28/2004
From:	Pickett D NRC/NRR/DLPM/LPD3
To:	Crane C AmerGen Energy Co
Pickett , NRR/DLPM, 415-1364
References
TAC MC3035
Download: ML042570465 (6)

Text

September 28, 2004 Mr. Christopher M. Crane, President and Chief Executive Officer AmerGen Energy Company, LLC 4300 Winfield Road Warrenville, Illinois 60555

SUBJECT:

CLINTON POWER STATION, UNIT 1 - REQUEST FOR ADDITIONAL INFORMATION (TAC NO. MC3035)

Dear Mr. Crane:

By letter dated April 26, 2004 (RS-04-044), AmerGen Energy Company, LLC, proposed a change to Clinton Power Station Technical Specification 3.8.7, Inverters - Operating. The proposed change would revise the Completion Time for Required Action A.1 from the current 24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br /> for a Division 1 or 2 Nuclear System Protection System inverter inoperable to 7 days.

As part of the staffs review, the staff has identified the enclosed request for additional information. This information will be needed to assist the staff in completing their review.

Please contact me at 301-415-1364 if you have any questions.

Sincerely,

/RA/

Douglas V. Pickett, Senior Project Manager, Section 2 Project Directorate III Division of Licensing Project Management Office of Nuclear Reactor Regulation Docket No. 50-461

Enclosure:

As stated cc w/encl: See next page

September 28, 2004 Mr. Christopher M. Crane, President and Chief Executive Officer AmerGen Energy Company, LLC 4300 Winfield Road Warrenville, Illinois 60555

SUBJECT:

CLINTON POWER STATION, UNIT 1 - REQUEST FOR ADDITIONAL INFORMATION (TAC NO. MC3035)

Dear Mr. Crane:

By letter dated April 26, 2004 (RS-04-044), AmerGen Energy Company, LLC, proposed a change to Clinton Power Station Technical Specification 3.8.7, Inverters - Operating. The proposed change would revise the Completion Time for Required Action A.1 from the current 24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br /> for a Division 1 or 2 Nuclear System Protection System inverter inoperable to 7 days.

As part of the staffs review, the staff has identified the enclosed request for additional information. This information will be needed to assist the staff in completing their review.

Please contact me at 301-415-1364 if you have any questions.

Sincerely,

/RA/

Douglas V. Pickett, Senior Project Manager, Section 2 Project Directorate III Division of Licensing Project Management Office of Nuclear Reactor Regulation Docket No. 50-461

Enclosure:

As stated cc w/encl: See next page DISTRIBUTION:

PUBLIC PDIII-2 AMendiola PCoates DPickett OGC ACRS SReynolds, RIII GHill (2) RJenkins DNguyen TBoyce TOwusu ADAMS Accession Number: ML042570465 OFFICE PM:PD3-2 LA:PD3-2 SC:EEIB SC:PD3-2 NAME DPickett PCoates RJenkins* AMendiola DATE 09/27/04 N/A 08/02/04 09/28/04 OFFICIAL RECORD COPY

• See RJenkins to AMendiola memorandum dated 8/2/04

Clinton Power Station, Unit 1 cc:

Senior Vice President - Nuclear Services Clinton Power Station Plant Manager AmerGen Energy Company, LLC AmerGen Energy Company, LLC 4300 Winfield Road Clinton Power Station Warrenville, IL 60555 RR 3, Box 228 Clinton, IL 61727-9351 Vice President of Operations - Mid-West Boiling Water Reactors Resident Inspector AmerGen Energy Company, LLC U.S. Nuclear Regulatory Commission 4300 Winfield Road RR #3, Box 229A Warrenville, IL 60555 Clinton, IL 61727 Vice President - Licensing and Chief Operating Officer Regulatory Affairs AmerGen Energy Company, LLC AmerGen Energy Company, LLC 4300 Winfield Road 4300 Winfield Road Warrenville, IL 60555 Warrenville, IL 60555 Regional Administrator, Region III Manager Licensing - Dresden, Quad Cities, U.S. Nuclear Regulatory Commission and Clinton 801 Warrenville Road AmerGen Energy Company, LLC Lisle, IL 60532-4351 4300 Winfield Road Warrenville, IL 60555 Associate General Counsel AmerGen Energy Company, LLC Regulatory Assurance Manager - Clinton 4300 Winfield Road AmerGen Energy Company, LLC Warrenville, IL 60555 Clinton Power Station RR3, Box 228 R. T. Hill Clinton, IL 61727-9351 Licensing Services Manager General Electric Company Director - Licensing and Regulatory Affairs 175 Curtner Avenue, M/C 481 AmerGen Energy Company, LLC San Jose, CA 95125 4300 Winfield Road Warrenville, IL 60555 Chairman of DeWitt County c/o County Clerks Office Document Control Desk-Licensing DeWitt County Courthouse AmerGen Energy Company, LLC Clinton, IL 61727 4300 Winfield Road Warrenville, IL 60555 Site Vice President - Clinton Power Station AmerGen Energy Company, LLC Clinton Power Station RR 3, Box 228 Clinton, IL 61727-9351

Clinton Power Station, Unit 1 J. W. Blattner Project Manager Sargent & Lundy Engineers 55 East Monroe Street Chicago, IL 60603 Illinois Emergency Management Agency Division of Disaster Assistance &

Preparedness 110 East Adams Street Springfield, IL 62701-1109

REQUEST FOR ADDITIONAL INFORMATION CLINTON POWER STATION, UNIT 1 DOCKET NO. 05000-461

1. During an extended inverter allowed outage time (AOT), the instrument bus would be powered from the constant voltage transformer. In the event of loss of offsite power (LOOP), the power supply to the instrumentation bus would be dependent upon the emergency diesel generator. As a result, entry into extended AOT concurrent with an EDG routine maintenance could have an impact on plant safety leaving the instrument bus without power. In addition, an entry into the extended inverter AOT, concurrent with planned maintenance on another reactor protection system (RPS)/engineered safety feature actuation system (ESFAS) channel, could potentially result in that channel being in a tripped condition. Provide compensatory measures that would be taken before and during the time the instrument bus inverter is removed for an extended outage. For any compensatory measure proposed, identify how these actions will be documented and controlled at the facility.

2. As stated in Regulatory Guide (RG) 1.177, An Approach for Plant-Specific, Risk-Informed Decision Making Technical Specifications, a Technical Specification (TS) change may be requested to reduce the unnecessary burdens in complying with current TS requirements, based on operating history of the plant or industry in general. Please provide maintenance (e.g., time to repair) and operating (e.g., constant voltage transformer and inverter failure rates) data for the extended outage.

ENCLOSURE