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MONTHYEARML20244A4711978-07-15015 July 1978
Comments on Subj Facil Soil Study of Category I Struc. Studies 1-4 Conclude That Liquefaction Should Not Occur During the Simultaneous Occurrence of the SSE & the 25 Year Flood.Agrees W/Studies & Suggests a Portion Be Amplified
Project stage: Other
ML19259B2361979-01-0909 January 1979
Request Addl Info on Suppl 2 to Soil study-Category 1 Structures for Completion Review.Requests Liquefaction Analysis of Area Northwest of Category 1 Structures & Should Be Completed by Mid Jan 1979
Project stage: Other
ML20245C3251979-01-25025 January 1979
Response to Questions 362.1,362.2 & 362.3 of NRC Ltr
Project stage: Other
ML19259B5081979-02-0606 February 1979
Documents Info Which Has Been Developed Since 790126 Site Meeting W/Util.Request by Util to Adopt & Design Ground Acceleration of 0.10 G on Unit 1 on an Interim Basis Is Acceptable
Project stage: Meeting
ML19263C3951979-02-12012 February 1979
As Result of 790125-26 Meeting,Core Boring Program Is Underway to Obtain Addl Soil Samples for Liquefaction Analysis.Will Develop Program for Stability Improvement If Necessary.Will Complete Activities by 790430
Project stage: Meeting
ML20244A6391979-04-0202 April 1979
Summary of 790126 Meeting W/S&W to Discuss Soils Study & Site Liquefaction.Submits Util Responses to Questions 362.1,362.2 & 362.3 of NRC & Other Supporting Documentation
Project stage: Meeting
ML20244A6111979-05-0202 May 1979
Forwards Response to Questions 362.1,362.2 & 362.3 of NRC .Also Forwards Soil Analysis of Turbine Bldg & Northern Yard Area, ,in Response to Question 362.4
Project stage: Other
ML19207B7651979-08-29029 August 1979
Submits Errata Sheets 1 & 2 for Rept on Soil-Structure Interaction in Development of Amplified Response Spectra
Project stage: Other
ML19207B9861979-08-30030 August 1979
Requests Approval to Eliminate Administrative Control Described in Re Min River Water Elevation for Operation.Core Boring & Liquefaction Analyses Reveal No Potential for Liquification
Project stage: Other
ML19320C8801980-06-20020 June 1980
Recommends That Analysis Be Made of Impact of Estimated Average Dynamic Settlement on Equipment & Pipe Connections within Turbine Bldg.Info Needed for Review of Util 790502 Soil Analysis of Turbine Bldg & Northern Yard Area
Project stage: Approval
ML19351G4591981-01-27027 January 1981
Responds to 790830 Request to Eliminate Administrative Control Implementing Tech Spec 3.7.6.1A App a Action Statement.Partial Review of 790502 Submittal Verified Control No Longer Required & May Be Removed
Project stage: Approval
ML20041E1731982-02-17017 February 1982
Forwards Info Per 800620 Request Re 790502 Soil Analysis of Turbine Bldg & Northern Yard Area. Soil Sys Interaction Amplified Response Spectra Considered Design Basis for Plant Re Seismic Accelerations
Project stage: Other
1979-04-02
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'Af (412) 456-6000 435 Suth Avenue Pittsburgh, Pennsylvania 152 9 August 30, 1979 Director of Nuclear Reactor Regulation United States Nuclear Regulatory Commission Attn:
A. Schwencer, Chief Operating Reactor Branch No. 1 Division of Operating Reactors Washington, DC 20555
Reference:
Beaver Valley Power Station, Unit No. 1 Docket No. 50-334 Soil Stability and Minimum River Water Elevation for Operation Gentlemen:
Our letter of February 12, 1979 confirmed our com=itment to perform additional core borings at Beaver Valley and to perform liquifaction analyses based upon the results of these additional borings.
We also informed you that we had instituted administrative controls which required us to comply with the action statement of Appendix A Technical Specification 3.7.6.1.a in the event that the river water elevation reached 680 feet MSL.
The results of the core boring program and the liquifaction analyses were transmitted to you on May 2, 1979, by Mr. E. J. Woolever, Vice President, Engineering and Construction Division of the Duquesne Light Company.
The analytical results indicate that no potential for liquifaction exists in the soils beneath the turbine building at Beaver Valley for any river water elevation up to and including 690 feet MSL.
We are, therefore, requesting your approval to eliminate the administrative control described in our February 12, 1979 letter.
Ycur early consideration of this matter will be appreciated.
Very truly yours, Y
C. N. Dunn Vice President, Operations
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cc:
D. Beckman
..,r Cg hl Region I King of Prussia l
7 909060 2D