Letter Sequence Other |
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Results
Other: B10079, Discusses Position on Asymmetric LOCA Loads,In Response to NRC .Reactor Cavity Seal Will Not Be Subjected to Forces Creating Missile Hazard for Max pipe-break Opening Considered in WCAP-9558 & WCAP-9558,Revision 1, ML14184A106, ML15223A533, ML15238B097, ML17174B193, ML17207A438, ML17326A274, ML17338B145, ML18079B047, ML19208D035, ML19209A772, ML19209A773, ML19209B556, ML19209B989, ML19242A701, ML19247A568, ML19247B242, ML19249E918, ML19250C244, ML19259C125, ML19259C826, ML19259D694, ML19260D661, ML19262B585, ML19275A183, ML19275A432, ML19275A437, ML19275A443, ML19275A446, ML19296A786, ML19339C073, ML19347B263, ML20003A697
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MONTHYEARML19259C1251979-06-0606 June 1979
Responds to NRC .Discusses New Design for Reactor Cavity Annulus Seal Ring Support Sys.Describes Interim Operating Procedure Until New Sys Installed
Project stage: Other
ML19247A5681979-07-0505 July 1979
Notifies of Status of Rept on Reactor Cavity Annulus Seal. Most PWR Users Remove Ring During Normal Operation.Others Store Seal Ring in Raised Position During Normal Operation
Project stage: Other
ML15245A1061979-07-18018 July 1979
Discusses Review of Re Potential of Reactor Cavity Annulus Seal Ring to Become Destructive Missile. Requests Demonstration That Seal Ring Is Not Destructive or Removal of Seal Ring No Later than Next Refueling Outage
Project stage: Approval
ML19242A7011979-07-18018 July 1979
Requests Addl Info Demonstrating That Seal Ring Cannot Become Destructive Misile During lon-term Operation or Statement That Seal Ring Will Be Removed by Next Refueling Outage
Project stage: Other
ML19259C8261979-07-19019 July 1979
Advises That 780202 Response Has Been Reviewed Re Potential for Reactor Cavity Annulus Seal Ring to Become Destructive Missile in Loca.Requests Analysis Demonstrating Safe Conditions & Statement Re Seal Ring Removal
Project stage: Other
ML19247B2421979-07-26026 July 1979
Responds to Re Reactor Cavity Annulus Seal Ring. Requests Analysis of Seal Ring Effect on Other Containment Safety Components Should Ring Become Missile.Statement Promising Seal Ring Removal Before Next Refueling Outage
Project stage: Other
ML17244A8471979-09-0505 September 1979
Discusses Completion of Review of Response to Re Potential for Reactor Cavity Annulus Seal Ring to Become Destructive Missile in Event of LOCA Pipe Break Inside Reactor Cavity.Response Resolves Issue
Project stage: Approval
ML18043B0421979-09-0505 September 1979
Discusses Completion of Review of Response to Re Potential for Reactor Cavity Annulus Seal Ring to Become Destructive Missile in Event of LOCA Pipe Break Inside Reactor Cavity
Project stage: Approval
ML19275A4371979-09-11011 September 1979
Notifies That Util Response to NRC Acceptably Resolves Issue Re Potential for Reactor Cavity Annulus Seal Ring to Become Destructive Missile During LOCA
Project stage: Other
ML19208D0351979-09-11011 September 1979
Discusses Util Re Potential for Reactor Cavity Annulus Seal to Become Destructive Missile During Loca. Removal During Operation Is Acceptable Pending NRC Approval & Installation of Seal Ring Support Sys
Project stage: Other
ML19275A4321979-09-11011 September 1979
Notifies That Util Response to NRC Acceptably Resolves Issue Re Potential for Reactor Cavity Annulus Seal Ring to Become Destructive Missile During LOCA
Project stage: Other
ML17207A4381979-09-11011 September 1979
Notifies That Util Response to NRC Acceptably Resolves Issue Re Potential for Reactor Cavity Annulus Seal Ring to Become Destructive Missile During LOCA
Project stage: Other
ML19275A4431979-09-11011 September 1979
Notifies That Util Response to NRC Acceptably Resolves Issue Re Potential Issue for Reactor Cavity Annulus Seal Ring to Become Destructive Missile During LOCA
Project stage: Other
ML19275A4461979-09-11011 September 1979
Notifies That Util Response to NRC Acceptably Resolves Issue Re Potential for Reactor Cavity Annulus Seal Ring to Become Destructive Missile During LOCA
Project stage: Other
ML18079B0471979-09-18018 September 1979
Responds to Util Answer to NRC Re Reactor Cavity Seal Ring Generic Issue.Util Answer Acceptably Resolves Issue
Project stage: Other
ML17174B1931979-09-18018 September 1979
Notifies That Util Response to NRC Re Potential for Reactor Cavity Annulus Seal Ring to Become Destructive Missile During LOCA Acceptably Resolves Problem
Project stage: Other
ML17338B1451979-09-18018 September 1979
Responds to Util Answer to NRC Re Reactor Cavity Seal Ring Generic Issue.Util Answer Acceptably Resolves Issue
Project stage: Other
ML19209A7721979-09-18018 September 1979
Responds to Util Answer to NRC Re Reactor Cavity Seal Ring Generic Issue.Util Answer Acceptably Resolves Issue
Project stage: Other
ML19209A7731979-09-18018 September 1979
Responds to Util Answer to NRC Re Reactor Cavity Seal Ring Generic Issue.Util Answer Acceptably Resolves Issue
Project stage: Other
ML17326A2741979-09-18018 September 1979
Responds to Util Answer to NRC Re Reactor Cavity Seal Ring Generic Issue.Util Answer Acceptably Resolves Issue
Project stage: Other
ML19249E9181979-09-18018 September 1979
Notifies Util That Response to NRC Re Potential for Reactor Cavity Annulus Seal Ring to Become Destructive Missile During LOCA Acceptably Resolves Problem
Project stage: Other
ML14184A1061979-09-18018 September 1979
Notifies That Util Response to NRC Re Potential for Reactor Cavity Annulus Seal Ring to Become Destructive Missile During LOCA Acceptably Resolves Problem
Project stage: Other
ML19275A1831979-09-26026 September 1979
Submits Addl Info Omitted from Potential of Reactor Cavity Annulus Seal Ring to Become Destructive Missile in Event of LOCA Pipe Break Inside Reactor Cavity
Project stage: Other
ML19209B5561979-09-27027 September 1979
Responds to .Reactor Cavity Seal Ring Will Be Removed from Normal Operation No Later than Next Refueling Outage.Outage Is Scheduled for May-June 1980
Project stage: Other
ML19209B9891979-09-28028 September 1979
Ack Receipt of NRC Re Reactor Cavity Annulus Seal Ring.Util Will Take Necessary Action to Preclude Seal Ring Becoming Potential Missile.Action Will Begin No Later than Fourth Refueling Shutdown Scheduled for Fall 1980
Project stage: Other
ML19259D6941979-10-0202 October 1979
Responds to 780202 Response Re Potential for Reactor Cavity Annulus Seal Ring to Become Destructive Missile in Event of LOCA Pipe Break Inside Reactor Cavity.Response Inadequate. Must Demonstrate Safety or Remove Ring
Project stage: Other
ML19275A9151979-10-0202 October 1979
Discusses Review of Response to .Requests Demonstration That Seal Ring Cannot Become Destructive Missile During long-term Operation & That Public Health & Safety Is Not Threatened
Project stage: Approval
ML15223A5331979-10-11011 October 1979
Ack Receipt of .Ltr Did Not Provide Required Responses.Response Should Demonstrate That Seal Ring Cannot Become Destructive Missile.Info Requested within 30 Days of Ltr Receipt
Project stage: Other
ML19250C2441979-10-30030 October 1979
Informs of Resolution of Reactor Cavity Ring Seal Generic Issue
Project stage: Other
ML19254F9311979-11-0909 November 1979
Responds to 791002 Request for Info Re PWR Reactor Vessel Seal Ring Missile Problem.Seal Ring Cannot Become Destructive Missile During Continued long-term Operation & Poses No Threat to Public Health & Safety
Project stage: Request
ML19262B5851979-12-20020 December 1979
Advises That Seal Ring Should Be Removed Following Each Refueling Outage by Raising Ring More than 12 Ft Above Cavity Floor,In Response to NRC 791002 Request.Util Does Not Concur W/Nrc Belief That Ring Could Become Missile
Project stage: Other
ML19260D6611980-01-26026 January 1980
Responds to Re NRC 791002 Request to Evaluate Potential for Reactor Cavity Annulus Seal Ring to Become Destructive Missile During LOCA Pipe Break Inside Reactor Cavity.No Further Action Required
Project stage: Other
ML19296A7861980-01-28028 January 1980
Accepts Util 790927 Commitment to Remove Reactor Cavity Seal Ring During Normal Operations Prior to Startup Following Next Refueling Outage.Commitment Resolves Issue Discussed in NRC
Project stage: Other
ML19260E2921980-02-0404 February 1980
Notifies That NRC Has Completed Review of Util 791220 Response Re Potential for Reactor Cavity Annulus Seal Ring to Become Destructive Missile in Event of LOCA Pipe Break Inside Reactor Cavity.Response Acceptably Resolves Issue
Project stage: Approval
ML15238B0971980-04-30030 April 1980
Notifies That Removal & Storage of Reactor Cavity Seal Ring Satisfactorily Resolves Safety Issue Identified in NRC
Project stage: Other
ML19316A8251980-05-0808 May 1980
Advises That Review of of 790926 Response to NRC Re Potential Destructive Consequence for Annulus Seal Ring in Event of LOCA Pipe Break Is Complete.Decision Not to Use Seal Ring Except During Refueling Is Acceptable
Project stage: Approval
ML19347B2631980-09-29029 September 1980
Responds to Re Proposed Reactor Cavity Annual Seal Plate Storage.Relocation to Storage Area Remote from Differential Pressures Generated within Reactor Cavity Following Postulated LOCA Is Acceptable
Project stage: Other
ML18139A5651980-09-30030 September 1980
Responds to NRC Request for Updated Status Rept on Reactor Vessel Flange Seal Ring Analysis.Westinghouse Owners Group Study Offers Rationale for Not Requiring Installation of Pipe Break Restraints
Project stage: Request
B10079, Discusses Position on Asymmetric LOCA Loads,In Response to NRC .Reactor Cavity Seal Will Not Be Subjected to Forces Creating Missile Hazard for Max pipe-break Opening Considered in WCAP-9558 & WCAP-9558,Revision 11980-10-0303 October 1980
Discusses Position on Asymmetric LOCA Loads,In Response to NRC .Reactor Cavity Seal Will Not Be Subjected to Forces Creating Missile Hazard for Max pipe-break Opening Considered in WCAP-9558 & WCAP-9558,Revision 1
Project stage: Other
ML19339C0731980-10-30030 October 1980
Verifies That Seal Ring Has Been Removed from Cavity Annulus Area & Is Not Potential Missile Hazard.Concludes That Safety Issue Has Been Satisfactorily Resolved
Project stage: Other
ML20003A6971981-01-21021 January 1981
Notifies of Satisfactory Resolution of Safety Issue Re Potential for Reactor Cavity Annulus Seal Ring or Biological Shielding within Reactor Cavity to Become Missile in Event of LOCA
Project stage: Other
1979-09-26
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Text
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NUCLEAR REGULATORY COMMISSION
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October 2, 1979
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Docket No. 50-348 Mr. Alan R. Barton Senior Vice President Alabama Power Company Post Office Box 2641 Biraingham, Alabama 35291
/
Dear Mr. Barton:
We e se reviewed your response to our letter dated February 2,1978, in.-egard to the octantial for the reactor cavity annulus seal ring to become a destrt. ive missile in the event of a less-of-coolant accident pipe break inside the reactor cavity.
In your response, you indicated that the seal ring is in a raised position and'does not fum a seal between the vessel and the cavity during reactor operation. One licensee has informed NRC that for their seal ring the raised position does not eliminate the possibility that the seal ring could become a missile following a postulated reactor coolant pipe rupture inside the reactor vessel cavity. Therefore, pursuant to 10 CFR 50.54 (f) of the Commission's regulations you are requested to (a) demonstrate by apprcpriate analysis that the seal ring
.cannot become a destructive missile during continued long-term operation and that it poses no threat to the health and safety of the public; or (b) furnish a stattment that the seal ring will be removed by no later than the rext refueling outage.
Please respond within 60 days of your receipt of this letter.
Sincerely, W5&f$bC-A. Sch.tencer, Chief Operating Reactors Branch #1 Division of Operating Reactors cc:
See next page 1212 154 2Q2 7910260 p
Mr. Alan R. harten Alabama Pcwer Company October 2,1979 cc: Ruble A. Thomas, Vice President Southern Services, Inc.
Post Office Box 2625 Bimingham, Alabama 35202 George F. Trewbridge, Esquire Shaw, Pittman, Potts and Trowbridge 1800 M Street, N.W.
Washington, D. C.
20036 John Bingham, Esquire Balch, Bingham, Baker, Hawthorne, Williams and Ward 600 North 13th Street Bimingham, Alabama 35202 Edward H. Keiler, Esquire
~
Keiler and Su~ckley 9047 Jefferson Highway River Ridge, Louisiana 70123 George S. Houston Memorial Library 212 W. Burdeshaw Street Oothan, Alacama 36303 1212 055
