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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p h PublicService conwny of colorado 2420 W. 26th Avenue, Suite 1000, Denver, Colorado 80211 July 16, 1985 Fort St. Vrain Unit No. 1 P-85234 D
@ @ QQ}9!, g{I Regional Administrator Region IV u
U. S. Nuclear Regulatory Comission i
611 Ryan Plaza Drive, Suite 1000
.i JR 2 A E l' l, Arlington, Texas 76011
[
Attn: Mr. E. H. Johnson Docket No. 50-267
SUBJECT:
Masonry Block Walls
REFERENCES:
PSC Letter to Johnson from Lee dtd March 1, 1985 (P-85069)
Telecon between PSC and NRC on June 27, 1985
Dear Mr. Johnson:
In Attachment 2 of the above referenced letter, PSC comitted to mortar in place five previously unmortared stacked block walls by August 2,
1985.
Three of these walls serve as closures for access penetrations through reinforced concrete walls into fuel storage well compartments.
A majority of the storage wells currently contain spent fuel blocks, and high radiation levels have been encountered at these wall locations during attempted construction activities.
In keeping with our policy of maintaining individual exposure levels as low as reasonably achievable, we will be unable to complete work on these three walls by August 2, 1985 as previously stated.
Pending no change in spent fuel shipping schedules, PSC anticipates completing work on these three walls by December 31, 1985.
As requested by the NRC during the telephone conversation between PSC and NRC on June 27, 1985, PSC would like to clarify that all of the wall modifications addressed in Attachment 2 of the above referenced letter are designed to meet the Structural and Geotechnical 8508020474 850716
[00 h7-[7/
PDR ADOCK 05000267 ggd O l P
PDR
6 Engineering Branch (SGEB) criteria. Additionally, we would like to document that the safety related masonry walls located in Building 10 have been conservatively analyzed as unreinforced masonry walls, although in reality the walls are constructed of reinforced masonry.
The results of these analyses show that the Building 10 walls, when considered unreinforced, will meet the SGEB Criteria.
The reinforcing steel in the walls provides for additional conservatism in the design.
Should you have any questions, please contact Mr. M. H. Holmes at (303) 571-8409.
Very truly yours, b fY fuu &
D. W. Wareabourg, Mahager Nuclear Engineering Division DWW/MM:pa l
1 e
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