Letter Sequence Other |
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Results
Other: 05000267/LER-1983-009, Forwards LER 83-009/01T-0.Detailed Event Analysis Encl, 05000267/LER-1983-009-01, /01T-0:on 830223,four Masonry Walls Found to Have Inadequate Structural Strength to Withstand Design Criteria Load Combination.Caused by Lack of Dur-O-Wall.Mod Reinforcing Walls W/Steel Bar Straps Completed, ML20079H542, ML20080G208, ML20080H068, ML20082K457, ML20093G129, ML20108F438, ML20132G022, ML20141K274
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MONTHYEARML20028E9731982-12-23023 December 1982
Notifies That Response to 821119 Request for Addl Info on Masonry Block Walls Will Be Delayed Until 830114
Project stage: Request
05000267/LER-1983-009, Forwards LER 83-009/01T-0.Detailed Event Analysis Encl1983-03-0909 March 1983
Forwards LER 83-009/01T-0.Detailed Event Analysis Encl
Project stage: Other
05000267/LER-1983-009-01, /01T-0:on 830223,four Masonry Walls Found to Have Inadequate Structural Strength to Withstand Design Criteria Load Combination.Caused by Lack of Dur-O-Wall.Mod Reinforcing Walls W/Steel Bar Straps Completed1983-03-0909 March 1983
/01T-0:on 830223,four Masonry Walls Found to Have Inadequate Structural Strength to Withstand Design Criteria Load Combination.Caused by Lack of Dur-O-Wall.Mod Reinforcing Walls W/Steel Bar Straps Completed
Project stage: Other
ML20080G2081983-09-0606 September 1983
Forwards Response Spectra Curves Used in Reanalysis of Masonry Block Walls,Per Request.Walls Reanalyzed Per IE Bulletin 80-11 for SSE W/Damping Value of 5%
Project stage: Other
ML20080H0681983-09-16016 September 1983
Masonry Wall Design,Fort St Vrain Nuclear Plant, Technical Evaluation Rept
Project stage: Other
ML20082K4571983-11-0808 November 1983
Responds to Re IE Bulletin 80-11, Joint Reinforcement in Masonry Walls. Reevaluation Will Be Made of All Class I Masonry Walls Seismically Qualified Considering Dur-o-Wall as Structural Element
Project stage: Other
ML20079H5421984-01-0606 January 1984
Provides Alternative Acceptance Criteria for Determining Workability of Concrete During Period in Which 1-1/2 H Time Requirement Deleted from Bldg 10 Concrete Spec
Project stage: Other
ML20093G1291984-07-0606 July 1984
Informs That Util Completed Const Work on 840706 Re Joint Reinforcement in Masonry Walls Per IE Bulletin 80-11.No Structural Credit Taken for Dur-O-Wall in Masonry Block Walls Near safety-related Equipment
Project stage: Other
ML20108F4381985-03-0101 March 1985
Forwards Sketches Indicating Method Utilized to Reinforce Walls & List of Reworked Walls,Per IE Bulletin 80-11 & Response to NRC 850116 Telcon Questions
Project stage: Other
ML20132G0221985-07-16016 July 1985
Notifies That Three of Five Unmortared Stacked Block Walls Will Not Be Mortared in Place by 850802,per 850301 Commitment,Due to High Radiation Levels Near Fuel Storage Well.Completion Anticipated by 851231
Project stage: Other
ML20141K2701986-01-15015 January 1986
Forwards Sser Based on Review of Util 850301 & 0716 Addl Info Re Compliance W/Ie Bulletin 80-11,Items 2(b) & 3 for safety-related Masonry Walls.Remaining Wall Designs Adequate.Items Fully Implemented
Project stage: Approval
ML20141K2741986-01-15015 January 1986
Sser Supporting Util 850301 & 0716 Addl Info Re Compliance W/Ie Bulletin 80-11,Items 2(b) & 3 for safety-related Masonry Walls
Project stage: Other
1983-09-06
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Text
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- li public Service Company &Oderado l
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2420 W. 26th Avenue, Suite 100D Denver, Colorado 80211 Q
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November 8,1983 Fort St. Vrain Unit No. 1 P-83364 Mr. E. H. Johnson Chief, Reactor Project Branch 1 Nuclear Regulatory Commission f
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611 Ryan Plaza Drive
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iM Suite 1000 Arlington, Texas 76012 DOCKET N0.:
50-267
SUBJECT:
I&E Bulletin 80-11, Joint Reinforcement in Masonry Walls
REFERENCE:
NRC Letter from E.H. Johnson to 0.R. Lee (G-83375)
Dear Mr. Johnson:
The following is Public Service Company of Colorado's response to your letter of October 18, 1983 addressing the structural capacity of joint reinforcement in masonry walls.
While PSC is of the opinion that "Dur-o-Wall" is an acceptable structural reinforcement for masonry walls and does have moment resisting capabilities, a re-evaluation will be,made of all Class I masonry walls which were seismically qualified considering Dur-o-Wall as a structural element.
Per Attachment 2 of the above referenced letter, no structural credit will be taken for the Dur-o-Wall.
These walls, as required, will be reinforced with metal bar straps to withstand the safe shutdown seismic event.
This work shall be completed by July 2, 1984.
The documentation for this work will be available in our office for your review.
If you have any questions concerning this project, please contact Mr. J.R. Reesy at (303) 571-8406.
Wry truly yours, W
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H. L. Brey, Manager Nuclear Engineering Division HLB /MM:pa 8312050171 831108 3 A PDR ADOCK 05000267 8 F G
PDR I
