IR 05000282/1985013

Insp Repts 50-282/85-13 & 50-306/85-10 on 850522.No Violations or Deviations Noted.Major Areas Inspected:Util Action Re IE Bulletin 80-11 Concerning Masonry Wall Design

ML20127D699
Person / Time
Site:	Prairie Island
Issue date:	06/05/1985
From:	Norton J, Williams C NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION III)
To:
Shared Package
ML20127D689	List: IR 05000282/1985013 ML20127D685
References
50-282-85-13, 50-306-85-10, IEB-80-11, NUDOCS 8506240304
Download: ML20127D699 (3)

Text

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U.S. NUCLEAR REGULATORY C0KN15S10N

REGION III

Reports N . 50-282/85013(DRS); 50-306/85010(DRS) ,.

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Docket No. 50-282i 50-306 License No. DPR-42; DPR-60

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Licensee: Northern States Power Company #

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414 Nicollet M271 3 Minneapolis,MNl55401  ;

Facility Name: Prairie Island Nuclear Generating Plants, Unip1 and 2 Inspection At: Red Wing, MN , 3 Inspecti5n ConductbJ: May 22, 1985 Inspectar: J.F.hNorton

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Plant Systems Section .- Date s

Inspection Summary "

Inspection on May 22, 1985 (Report No. 50-282/85013(DRS))'; 50-306/85010(DRS))

Areas Inspected: Licensee action relative to IE- Bulletin 80-11, " Masonry Wall

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Design." The inspection involved a' total of 12 inspector-hours by one NRC inspecto Results: No violations or,, deviations were identifie i

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O DETAILS 1. Persons Contacted Northern States Power Company (NSP)

E. Watzl, Plant Manager L. Anderson, Lead Production Engineer C. Baltos, Engineering Associate Nuclear Regulatory Commission J. Hard, Resident Inspector 2. Licensee Action on IE Bulletin 80-11 Franklin Research Center (FRC), Philadelphia, issued a Technical Evaluation Report (TER) addressing masonry wall design at Prairie Island on August 16, 1983. The TER was reviewed during this inspection, in conjunction with NSP's revised 180 day report dated November 30, 198 FRC concluded in the TER that the masonry wall re-evaluation and design for Prairie Island is adequate and in compliance with acceptance criteri . Structural Modifications Ninety-seven of the 121 safety-related masonry walls met the re-evaluation criteria as originally constructe Twenty-four walls did not meet the IE 80-11 criteria, and required structural strengthening measures. Sixteen of these walls required changing the free edge to a simple support, and eight walls required reduction of wall span by providing additional support . Wall Inspection The Region III inspector accomplished a walkdown inspection of 22 of the modified walls. Comparison of design drawings and completed modifications was accomplished to verify conformance with design. No discrepancies were observed during the comparison . Review of Quality Records Review of quality records relevant to the design changes and construction modifications was accomplished. The licensee's QA/QC program, including design control, was appropriately implemented in the design / construction process, and found to be in accordance with requirement . Exit Meeting The inspector met with licensee representatives (denoted under persons contacted) at the conclusion of the inspections on May 22, 1985. The inspector summarized the purpose and findings as reported herein. The

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inspector also discussed the likely informational content of the inspection report with regard to documents or processes reviewed by the inspector during the inspection.- The licensee did not-identify any such documents / processes as proprietar ,

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