Letter Sequence Other |
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Results
Other: ML18113A966, ML18113A996, ML18114A612, ML18114A720, ML19207B079, ML19224C794, ML19225C064, ML19241B211, ML19246A721, ML19261C984, ML19269D615, ML19289F676, ML19344D736, ML20244A550, ML20244A556, ML20244A647
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MONTHYEARML18113A9961979-03-13013 March 1979
Order to Show Cause Re Potentially Deficient Piping Design. Orders Facility to Be Placed in Cold Shutdown within 48-h
Project stage: Other
ML19282C6771979-03-15015 March 1979
Summary of 790308 Meeting W/S&W to Discuss Pipe Stress Calculations Using Pipestress Code
Project stage: Meeting
ML18113A9671979-03-15015 March 1979
Notification of 790316 & 17 Meeting W/S&W in Bethesda,Md to Discuss Reinstating Operation at Facilities Which Received Shutdown Orders on 790313
Project stage: Meeting
ML18113A9661979-03-20020 March 1979
Summarizes 790320 Telcon W/S&W Re Future Actions to Resolve Outstanding Seismic Concern of Five Shutdown Plants.Requests Reanalysis Results of safety-related Piping Sys & Supports
Project stage: Other
ML19263D8341979-03-26026 March 1979
Discusses 790301 Telcon W/Util & S&W.Nrc Requested Copy of Pipestress Computer Code to Compare W/Nupipe.S&W Stated Policy of Not Releasing Codes or Calculations.Meeting on 790308 for S&W to Bring Pipestress to NRC for Review
Project stage: Meeting
ML18114A5381979-03-29029 March 1979
Assigns Responsibility for Prompt Meeting Notification Re 790313 Show Cause Orders
Project stage: Meeting
ML20244A5561979-03-31031 March 1979
Answer to NRC 790313 Order to Show Cause.Will Reanalyze Seismic Loads on Piping Sys & Will Modify Sys Where Necessary.Expects to Submit Documented Results by 790424. Believes NRC Should Examine S&W Analyses
Project stage: Other
ML20244A5501979-03-31031 March 1979
Forwards Formal Util Response to NRC 790313 Order to Show Cause Re Potentially Unsafe Piping Sys
Project stage: Other
ML19261C9841979-04-0202 April 1979
Forwards Description of Info to Be Documented for NRC Review for Facility.Requests Schedule for Submittal of This Info Prior to Plant Startup
Project stage: Other
ML19344D7361979-04-10010 April 1979
Record of Telcon W/D Ford (Ucs) on 790320 Re Chronology of NRC Activities Re Pipestress Issue
Project stage: Other
ML19289E9721979-04-10010 April 1979
Summary of 790329-30 Meeting W/Util & S&W in Boston,Ma Re Progress to Date & Early Analysis of Pipe Stresses in safety-related Sys
Project stage: Meeting
ML19270G5371979-04-11011 April 1979
Delineates Criterion to Develop plant-specific Info Packages on Site Visits
Project stage: Request
ML20244A6471979-04-17017 April 1979
Licensees Response to 790402 Request of PA Public Util Commission for Hearing & Petition to Intervene Re 790313 Show Cause Order.Urges NRC to Hold Ruling in Abeyance. Certificate of Svc Encl
Project stage: Other
ML19289F0811979-04-20020 April 1979
Summary of 790411-12 Meeting W/Util & S&W in Boston,Ma Re Status of Reanalysis Efforts & Review of Packages Completed to Date
Project stage: Meeting
ML18114A6121979-05-18018 May 1979
Summarizes Procedures & Calculational Techniques Used in Reanalysis of Piping Sys Designed W/Shock II Computer Program.Reanalysis Will Satisfy 790313 Order to Show Cause
Project stage: Other
ML19224C7941979-05-18018 May 1979
Requests Addl Info in Order for NRC to Review Proposed Amplified Response Spectra Using Soil Structure Interaction
Project stage: Other
ML19269D6151979-05-23023 May 1979
Responds to NRC .Forwards Amplified Response Spectra Based on Soil Structure Interaction.Details Result of Analysis of Small Strain Valves of Plus or Minus 50%
Project stage: Other
ML18114A7201979-05-25025 May 1979
Discusses Position Re Use of Soil Structure Interaction for Seismic Pipestress Analyses Being Performed.Approves Methodology,Provided That Seismic Stresses Calculated Are Increased by Factor of 1.5
Project stage: Other
ML19246A7211979-05-25025 May 1979
Submits Identified Areas to Be Addressed During Seismic Pipestress Reanalysis
Project stage: Other
ML19241B2111979-05-25025 May 1979
Discusses Areas to Be Covered in Interim or Final Rept on Seismic Pipestress Reanalysis,Including Stresses Due to Seismic Anchor Movements,Support Stiffness Accountability & Criteria for Pipe Support & Design
Project stage: Other
ML19289F6761979-06-11011 June 1979
Discusses Present Status of Piping Sys Reanalysis.Reanalysis Complete & Two Hydraulic Snubbers Installed.No Pipe Is Overstressed in Event of Safe Shutdown Earthquake.Rept Supporting 790706 Request to Be Submitted by 790618
Project stage: Other
ML19241B8541979-06-14014 June 1979
Summary of 790524 Meeting W/S&W & Util in Bethesda,Md Re Amplified Response Spectra Developed W/Consideration of Soil Structure Interactions
Project stage: Meeting
ML19225C0641979-07-23023 July 1979
Requests Termination of 790313 Order to Show Cause Re safety-related Piping Sys
Project stage: Other
ML19249A7131979-08-0303 August 1979
Draft Safety Evaluation Supporting Resumption of Operation Per Required Mods to Seven Supports,Addition of Three Others & Approval of Two Supports Not Yet Found to Be Acceptable
Project stage: Draft Approval
ML19249A7091979-08-0303 August 1979
Draft Order Not Requiring Continued Shutdown of Facility or Termination Proceeding Initiated by 790313 Order.Analysis & Mod to Fuel Pool Cooling & Purification Sys Required Before Further Use
Project stage: Draft Other
ML19249A7041979-08-0303 August 1979
Forwards for Consideration Draft Order & Draft Safety Evaluation Re Facility Shutdown Per Lack of Assurance That Analysis of Piping Sys for Seismic Loads Provided Proof of Safe Shutdown During Seismic Event
Project stage: Draft Approval
ML19207B0861979-08-0808 August 1979
Safety Evaluation Supporting Order Terminating Proceeding Initiated by 790313 Show Cause Order Re Cold Shutdown Condition.Facility May Resume Power Operation
Project stage: Approval
ML19207B0791979-08-0808 August 1979
Order Terminating Proceeding Initiated by 790313 Show Cause Order Re Cold Shutdown Condition
Project stage: Other
1979-04-02
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'M 912) 4se-sooo 435 Sixth Avenue urgh, Pennsylvania June 11, 1979 Mr. Harold R. Denton Director of Nuclear Reactor Regulation United States Nuclear Regulatory Commission Attention:
A. Schwencer, Chief Operating Reactors Branch No.1 Division of Operating Reactors Washington, DC 20555
Reference:
Beaver Valley Power Statiotr, Unit-Nor 1 Docket No. 50-334 Status of Piping Reanalysis Program Gentlemen:
The purpose of this letter is to provide the present status of the reanalysis of the piping systems described in our April 2,1979 reply to the Nuclear Regulatory Commissions' March 13, 1979, " Order to Show Cause".
The pipe stress reanalysis has been completed and, with the installation of two hydraulic snubbers, no pipe is overstressed in the event of the occurrence of the safe shutdcwn earthquake. The reanalysis of the piping supports will be completed by the first week of July to the extent that we believe that no additional overstressed supports will be identified on the small nurber of piping systems for which the support rhanalysis will remain to be completed. This belief is based upon the experience gained in the reanalysis of the large nu=ber of supports that have been reanalyzed to date.
We have initiated the engineering and installation activities necessary to install two (2) additional hydraulic snubbers and to modify approximately fif teen (15) existing supports.
We intend to submit a report during the week of June 18, 1979 to support a request for station start up on approximately July 6,1979.
At that time, all modifications that we consider necessary to assure the functional capability of the emergency core cooling, engineered safety features, and safe shutdown systems subsequent to the occurrence of the safe shutdown earthqude will be completed. Therefore, we will request the portion of the March 13,1979, " Order to Show Cause" which requires the station to remain shutdown to be rescinded, and that a return to operation be permitted upon the completion of the identified modificaticos.
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2230 121 3l l 790615 0 $/421,
Beaver Valley Power Station, Unit No. 1 Docket No. 50-334 Status of Piping Reanalysis Program Page During the approximately six to seven weeks of operation that are required to expend the remaining fuel in the first cycle of the nuclear core the remainder of the reanalysis of the piping supports on the systems described in our letter of April 2, 1979 will be completed. All modifications of the pipe supports required to assure that stresses are within code allowable values for the operational basis earthquake, as well as the safe shutdown earthquake will be completed during the first refueling outage that will commence as soon as the remaining six to seven full power weeks of nuclear fuel in the first cycle is expended.
Very truly yours, E.
. Woolever Vice President, Engineering and Construction 2230 122
Mr. Harold R. Denton, NRC
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Status of Piping Reanalysis Program (CORPORATE SEAL)
Attest:
A/! :6&sm H. W. Staas Secretary COMM0hvEALTH OF PENNSYLVANIA)
) SS:
COUNTY OF ALLEGHENY
)
M On this
//
day of 7 af, 1979, before me, DONAT3 W. ST-Tirreg
, a Notary Public in and for said Commonwealth and County, personally appeared E. J. Woolever, who being duly sworn, deposed, and said that (1) he is Vice President of Duquesne Light, (2) he is duly authorized to execute and file the foregoing Stiomittal on behalf of said Company, and (3) the statements set forth in the Submittal are true and correct to the best of his knowledge, information and belief.
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L s-DONALD W. SHANNCN, NOTARY pyggc PITTS2URCet ALLECHENY CCuhTy MY COMMIS$1CN EXPfRES JUNE 7.1383 Merter, Pt2sylvania Assocate of Nour'es 2230 123