ML042570465
| 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 AmerGen Energy Company, LLC 4300 Winfield Road Warrenville, IL 60555 Vice President of Operations - Mid-West Boiling Water Reactors AmerGen Energy Company, LLC 4300 Winfield Road Warrenville, IL 60555 Vice President - Licensing and Regulatory Affairs AmerGen Energy Company, LLC 4300 Winfield Road Warrenville, IL 60555 Manager Licensing - Dresden, Quad Cities, and Clinton AmerGen Energy Company, LLC 4300 Winfield Road Warrenville, IL 60555 Regulatory Assurance Manager - Clinton AmerGen Energy Company, LLC Clinton Power Station RR3, Box 228 Clinton, IL 61727-9351 Director - Licensing and Regulatory Affairs AmerGen Energy Company, LLC 4300 Winfield Road Warrenville, IL 60555 Document Control Desk-Licensing AmerGen Energy Company, LLC 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 Plant Manager AmerGen Energy Company, LLC Clinton Power Station RR 3, Box 228 Clinton, IL 61727-9351 Resident Inspector U.S. Nuclear Regulatory Commission RR #3, Box 229A Clinton, IL 61727 Chief Operating Officer AmerGen Energy Company, LLC 4300 Winfield Road Warrenville, IL 60555 Regional Administrator, Region III U.S. Nuclear Regulatory Commission 801 Warrenville Road Lisle, IL 60532-4351 Associate General Counsel AmerGen Energy Company, LLC 4300 Winfield Road Warrenville, IL 60555 R. T. Hill Licensing Services Manager General Electric Company 175 Curtner Avenue, M/C 481 San Jose, CA 95125 Chairman of DeWitt County c/o County Clerks Office DeWitt County Courthouse Clinton, IL 61727
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
ENCLOSURE 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.