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MONTHYEARML19261B1761979-02-0808 February 1979
Responds to NRC Re Containment Purging During Normal Operation.Reviewed Design of Safety Actuation Signals to Ensure That Overriding of One Signal Does Not Inhibit Other Signals.Maintains Subatmospheric Conditions
Project stage: Other
ML19260B5841979-10-29029 October 1979
Discusses NRC Concern Re Containment Purging & Venting During Normal Operation.Includes Licensee Override of Safety Actuation Isolation Signals to Containment Isolation Valves & Valve Ability to Shut W/O Degrading Containment
Project stage: Other
ML19210C6291979-11-0202 November 1979
Requests Addl Info Re Containment Purge Sys
Project stage: Other
ML19260B5231979-12-0505 December 1979
Forwards Proposed Tech Spec 3/4.6.5,deleting Option to Utilize Steam Jet Air Ejector During Mode 4.Class II Amend Fee Encl
Project stage: Other
ML19305E7811980-05-16016 May 1980
Submits Addl Info & Schedules for Uncompleted Items Re Bypass & Reset of Engineered Safety Features Per 800404 Request
Project stage: Other
ML19347C7391980-12-31031 December 1980
Forwards Nonproprietary & Proprietary Versions of Response to NUREG-0737. Proprietary Version Available in Central Files Only
Project stage: Other
ML19341C6391981-02-23023 February 1981
Informs That Licensee Agreed to Actions Re Resetting of Main Feedwater & Bypass Valves After Feedwater Isolation Signal. Control Circuitry Revised to Prevent Valves from Returning to Pretrip Position on Resetting ESF Signal
Project stage: Other
ML20009E3001981-07-15015 July 1981
Forwards Safety Evaluation Accepting Containment Purge & Venting Sys Design & Operating Practices.Proposal for Tech Spec Change Incorporating Test Requirements for Butterfly Isolation Valves Requested within 45 Days
Project stage: Approval
ML20010A3821981-08-0606 August 1981
Submits Justification of Licensing/Engineering Dept Determination That Mod of Main Feedwater Valve Circuits Is Not Necessary.Diagrams Encl
Project stage: Other
ML20054D6381982-04-16016 April 1982
Responds to 820317 Generic Ltr 82-05, Post-TMI Requirements Re Scheduling of Specific NUREG-0737 Items
Project stage: Other
1980-12-31
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February 23, 1981 f 5719 Director of Nuclear Reactor Regulation United States Nuclear Regulatory Commission Attn:
Mr. Steven A. Varga, Chief Operating Reactcrs Branch No. 1 Division of Licensic.g Washington, DC 20555
Reference:
Beaver Valley Power Station, Unit No. 1 Docket No. 50-334, License No. DPR-66 ESF Reset - Additional Information Gentlemen:
In recent discussions with Messrs. J. T. Beard and D. Chaney of your staff, Duquesne Light Company has agreed to the following actions concerning resetting of the main feedwater and bypass regulating valves after a feed-water isolation signal. As a short term action, procedures will be reviewed and revised, as necessary, to require placing the controllers in manual and resetting the valves to the closed position. On-shift training will be provided to the operators for the procedure changes. The permanent corrective action will be to revise the control circuitry to prevent the valves from returning to their pre-trip position on resetting the ESF signal. This modification will be installed at the next scheduled refueling outage.
If you have any questions, please contact my office.
Very truly yours,
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C. N. Dunn Vice President, Operations cc:
D. A. Beckman, Resident Inspector g
U.S. Nuclear Regulatory Commission
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