Letter Sequence Approval |
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Results
Other: 05000267/LER-1986-022, :on 860715,failure Point in 480-volt Ac Essential Bus 1 & 2 Undervoltage Relay Logic Identified. Caused by Misunderstanding of Basic Design Requirements. Designer & Independent Reviewer Reprimanded, ML20134A365, ML20135H559, ML20135H563, ML20137B356, ML20137K999, ML20137S363, ML20140H110, ML20206T734, ML20207R947, ML20212G867
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MONTHYEARML20074A7561983-04-27027 April 1983
Clarifies Proposed Changes in Undervoltage Protection & Reiterates Schedule for Implementation of Design Changes & Mods.Existing non-Class IE Undervoltage Relays Will Be Retained as Protection for 4,160-volt Buses
Project stage: Request
ML20212N6621985-08-31031 August 1985
Technical Evaluation Rept for Proposed Change to Operation of Ginna Fuel Pool Charcoal Filter Sys, Informal Rept
Project stage: Request
ML20135H5631985-08-31031 August 1985
Truth-Analysis/Action-Reaction Review of 480-Volt Essential Bus Tie Breaker Control Scheme, Final Rept
Project stage: Other
ML20135H5591985-09-13013 September 1985
Forwards Truth-Analysis/Action-Reaction Review of 480-Volt Essential Bus Tie Breaker Control Scheme, Final Rept & Provides Evaluation of Control Logic Design
Project stage: Other
IR 05000267/19850171985-09-13013 September 1985
Insp Rept 50-267/85-17 on 850617-0816.Violation Noted: Failure to Rept Nine Circulator Trips in 1984 & Seven Trips in 1985 & No Differential Helium Pressure Maintained When Pcrv Pressure Above 100 Psia
Project stage: Request
ML20137S3631985-09-13013 September 1985
Corrected Page 1 to Responding to 850614 Commitment to Perform Evaluation of Emergency Diesel Generator Control Logic Circuitry.Ltr Number Changed
Project stage: Other
ML20134A3651985-10-23023 October 1985
Amends Correction Portion of Item 2 (286G1A & 286G1B) in Util Re Results of Proto-Power Corp Analysis Concerning Emergency Electrical Power Sys Independence
Project stage: Other
ML20137B3561986-01-0303 January 1986
Informs That Design Changes Involving Emergency Diesel Generator (EDG) Control Logic Circuitry Implemented.No Single Failure Will Interfere W/Proper Operation of Redundant EDG
Project stage: Other
ML20137K9991986-01-14014 January 1986
Notifies That Design Changes in Emergency Diesel Generator Control Logic Circuitry Implemented,Per 850913 Commitment. Changes Assure That Failure Will Not Interfere W/Operation of Redundant Generator.Ltr Supersedes
Project stage: Other
ML20140H1101986-03-31031 March 1986
Submits Info Re Startup Check List for Automatic Operation of Emergency Diesel Generators,Sys Operating Procedure 92-04,in Response to NRC .Numbers Will Be Assigned to All Valves in Emergency Diesel Generator Rooms
Project stage: Other
ML17251A7911986-03-31031 March 1986
Reactor Containment Bldg Integrated Leakage Rate Test
Project stage: Request
ML20206T7341986-07-0101 July 1986
Submits Summary & Schedule of Mods to Be Performed on Emergency Diesel Generator Control Circuitry in Response to 860515 & 21 Telcons.Mods Will Be Completed Prior to Startup from Current Equipment Qualification Outage
Project stage: Other
ML20213G5811986-08-0707 August 1986
Draft Review of Fort St Vrain Onsite AC Standby Power Sys W/Regards to Compliance to Single Failure Criterion & Ser
Project stage: Draft Other
05000267/LER-1986-022, :on 860715,failure Point in 480-volt Ac Essential Bus 1 & 2 Undervoltage Relay Logic Identified. Caused by Misunderstanding of Basic Design Requirements. Designer & Independent Reviewer Reprimanded1986-08-14014 August 1986
- on 860715,failure Point in 480-volt Ac Essential Bus 1 & 2 Undervoltage Relay Logic Identified. Caused by Misunderstanding of Basic Design Requirements. Designer & Independent Reviewer Reprimanded
Project stage: Other
ML20213G5641986-11-12012 November 1986
Forwards Onsite Class 1E Power Sys Design Features Review Status Rept Based on FSAR & NRC 860814 Meeting W/Licensee & Inel Draft Review of Fort St Vrain Onsite AC Standby Power.... Resolution to Problems Requested Before Restart
ML20212D8641986-12-24024 December 1986
Summary of 861209 Meeting W/Util Re Plant Emergency Electrical Power Sys.Fsar Commitment Re Emergency Diesel Generators revised.Marked-up Draft Rept Re Ac Standby Power Sys Encl
ML20212G8671987-01-0909 January 1987
Forwards Rev a to EE-92-0008, Engineering Evaluation of Load Shedding,Load Auto Start Prohibit,Load Sequencing,Bus Tie Breaker Alignment & Generator Breaker Closing Portions of Emergency Diesel Generator Control Circuitry
Project stage: Other
ML20207R9471987-03-0606 March 1987
Rev 1 to Review of Fort St Vrain Onsite AC `Standby Power Sys Re Compliance to Single Failure Criterion & Ser
Project stage: Other
ML20207R9381987-03-0606 March 1987
Forwards Rev 1 to EGG-NTA-7456, Review of Fort St Vrain Onsite AC `Standby Power Sys Re Compliance to Single Failure Criterion & Ser
Project stage: Approval
ML20207S6271987-03-12012 March 1987
Summary of 870210 Meeting W/Util Re Emergency Diesel Generator Electrical Independence.List of Attendees Encl
Project stage: Meeting
1986-12-24
[Table View] |
Text
_.
March 6, 1987 Docket No. 50-267 L
Mr. R.- 0. ' Williams, Jr.
Vice President, Nuclear Operations Public Service Company of Colorado P. O. Box 840 Denver, Colorado 80201-0840
Dear Mr. Williams:
SUBJECT:
FINAL TECHNICAL EVALUATION REPORT ON FORT ST. VRAIN EMERGENCY r
ELECTRICAL POWER SYSTEM Please find enclosed, a final version of the Technical Evaluation Report (TER) on the Fort St. Vrain Emergency Power System. This report was originally provided to you as a draft in our letter dated November 12, 1986. Your coments were considered and a marked up cepy of the TER was transmitted to you on December 24, 1986, as part of a meeting sumary. This TER is being provided, at this time, solely for your information.
Sincerely, original signed by Kenneth L. Heitner, Project Manager Standardization and Special Projects Directorate Division of PWR Licensing-B Office of Nuclear Reactor Regulation
Enclosure:
As stated cc w/ enclosure:
See next page ESTR; S JT;:0N:
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W ASHINGTO N. D. C. 20555 p
March 6, 1987 Cocket No. 50-267 Mr. R. O. Williar.s, Jr.
Vice President, Nuclear Operations Public Service Company of Colorado P. O. Eox 840 Denver, Colorado 80201-0840
Dear Mr. Williars:
SUBJECT:
FINAL TECHNICAL EVALUATION REPORT ON FORT ST. VRAIN EMERGENCY ELECTRICAL POWER SYSTEM Please find enclosed, a final version of the Technical Evaluation Report (TER) on the Fort St. Vrain Emergency Power. System. This report was originally provided to you as a draft in our letter dated November 12, 1986.
Your comments were considered and a marked up copy of the TER was transmitted to you on December 24, 1986, as part of a meeting summary.
This TER is being' provided, at this time, solely for your information.
Sincerely,
..s,
.s. 4 renneth L. Heitner, Project Manager Standardization and Special Projects Directorate Division of PWR Licensing-B Office of Nuclear Reactor Regulation
Enclosure:
As stated cc w/ enclosure:
See next page
Mr. R. O. Williams Public Service Company of Colorado Fort St. Vrain CC*
Mr. D. W. Warembourg, Manager Albert J. Hazle, Director Nuclear Engineering Division Radiation Control Division Public Service Company Department of Health of Colorado 4210 East lith Avenue P. O. Box 840 Denver, Colorado 80220 Denver, Colorado 80201 Mr. David Alberstein, 14/159A Mr. J. W. Gahm, Manager GA Technologies, Inc.
Nuclear Production Division Post Office Box 85608 Public Service Company of Colorado San Diego, California 92138 16805 Weld County Road 19-1/2 Platteville, Colorado 80651 Mr. H. L. Brey, Manager Nuclear Licensing and Fuel Division Mr. P. F. Tomlinson, Manager Public Service Company of Colorado Quality Assurance Division P. O. Box 840 Public Service Company of Colorado Denver, Colorado 80201 16805 Weld County Road 19-1/?
Platteville, Colorado 80651 Senior Resident Inspector U.S. Nuclear Regulatory Commission Mr. R. F. Walker P. 0. Box 840 Public Service Company of Colorado Platteville, Colorado 80651 Post Office Ecx 840 Denver, Colorado 80201-0840 Kelley, Stansfield & 0'Donnell Public Service Company Building Commitment Control Program Room 900 Coordinatoe 550 15th Street Public Service Company of Colorado Denver, Colorado 80202 2420 W. 26th Ave. Suite 100-D Denver, Colorado 80211 Regional Administrator, Region IV U.S. Nuclear Regulatory Commission 611 Ryan Plaza Drive, Suite 1000 Arlington, Texas 76011 Chairman, Board of County Commissioners of Weld County, Colorado Greeley, Colorado 80631 Regional Representative Radiation Programs Environmental Protection Agency 1 Denver Place 999 18th Street, Suite 1300 Denver, Colorado 80202-2413
. _.
