ML17053C487
| ML17053C487 | |
| Person / Time | |
|---|---|
| Site: | Nine Mile Point  |
| Issue date: | 03/24/1981 |
| From: | Kiper K Office of Nuclear Reactor Regulation |
| To: | Office of Nuclear Reactor Regulation |
| References | |
| NUDOCS 8103310781 | |
| Download: ML17053C487 (12) | |
Text
MEETING
SUMMARY
DISTRIBUTION Docket File NRC PDR Local PDR TIC/NS IC/Tera N. Hughes LB81 Reading H. Denton E.
Case N
D. Eisenhut R. Purple B. J.
Youngblood A. Schwencer F. Miragli,a J. Miller G.
Lainas'.
Vollmer J.
P. Knight R.
Bosnak F.
Schauer R.
E. Jackson Project Manager KKiper
- Attorney, OELD M. Rushbrook OIE (3)
ACRS (16)
R. Tedesco NRC Partici ants:
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Lear Noonan Pawlicki Benaroya Rosztoczy Haass Muller Ballard Regan Ross Check
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- Chief, Power Systems Branch O. Parr F.
W.
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Rosa Butler Kreger Houston L.
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Rubenstein Speis Johnston Stolz Hanauer Gammi l l Murley Schroeder Skovholt Ernst Baer Berl inge r Kniel Knighton Thadani Tondi Kramer Vassallo Collins Ziemann Chief, Radiological Assessment Branch bcc:
Applicant 8 Service List
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NN 2458'ocket Ho~BO-HI~0 APPLICAftT:
Niagara Mohawk Power Corporation FACILITY:
Nine f1ile Point, Unit 2
SUBJECT:
SUMMARY
OF flEETING HELD MARCH 6, 1981, TO DISCUSS THE USE OF THE DYWIDAG THREADBAR SYSTEf'1.
A meeting was held t1arch 6, 1981 in Bethesda, ffaryland with representatives from Niagara tlohawk Power Corporation (NHPC) to discuss the staff's require-ments for the use of the DYWIDAG Threadbar
- System, based on a letter, dated March 5, 1981, from NRC to fNPC.
Also present were the applicant's A/E Stone and Webster and Dyckerhoff and Widmann, Inc, the representative for DYWIDAG.
The applicant requested a limited approval to use the DYWIDAG Threadbar System in an unstaggered configuration at the junctions of the above-ground floor slabs and the exterior wall of the reactor building.
The bars would be used as. dowels, subject to a maximum stress of 16 Ksi under all applicable loading combinations.
The staff expressed its general concern that, in an unstaggered configuration, an area of 20% to 30% increase in strain at a loading of 90% of yield could cause a zone of weakness and cracking in the containment concrete.
The applicant responded that the strain was still within code allowance for unspliced bar.
The applicant agreed. to comply with the applicable sections of ASME Code 1980 Edition, including Summer."198g
- addenda, and ACI Code 349-76.
The applicant presented a statistical summary o~data showing that the strain on the connectors at 90% of yield doesn't exceed the strain. of an unspliced bar by more than 50'X.
The staff expressed its concern that the data~f~r the 818 bar, unlike the smaller
- grades, was very close to the 50'X point and indicated.that additional testing would be needed before 818 bar was approved for use.
The -applicant stated that for the present application, 811 bar was the maximum size to be used.
The staff also requested a similar statistical summary for a loading of 50K of"yield.
The applicant agreed to provide assurance by calculation that the stresses in this limited application are all less than 50% of yield.
The staff also requested the applicant to examine the balance ratio where it had indicated that it will be using 60 Grade bar with a 40 Grade design.
The applicant offered to commit to the ACI 349-76 clearance requirements for bar spacing.
Concerning the group tensile test requested in the letter to NNPC, dated March 5, 1981, the applicant would not commit to the test before an extensive review of the cost and feasibility of such a test.
The applicant requested specific directions as to the purpose of the test and what the staff wants to see as results.
The applicant requested approval of its limited application OFFICE/
SURNAME(
DATEP NRC FORM 318110/80) NRCM 0240 OFFICIAL RECORD COPY
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within 2 weeks, based on the above commitments but not on a commitment to any further testing.
The staff requested NPC to reply promptly to the letter of March 5, 1981 and to the further concerns brought out in the meeting, and indicated that the staff would respond in a reasonable timespan.
Original ei~8g y>>
Kenneth L. Zipea
Enclosure:
Attendees List Kenneth L. Kiper, project Manager Licensing Branch Ho.
1 Division of Licensing cc:
See next page OFFICEP SURNAME/
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KKipergys 3/23/81
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Niagara Mohawk Power Corporation ccs:
Eugene B. Thomas, Esq.
- LeBoeuf, Lamb, Leiby 8 MacRae 1333 Net Hampshire Avenue, N.W.
Suite 1100 Washington, D.
C.
20036 Anthony Z. Roisman, Esq.
Natural Resources Defense Council 917 15th Street, N.
W.
Washington, D.
C.
20005 Mr. Richard Goldsmith
,Syracuse University College of Law.
E. I. White Hall Campus
- Syracuse, New York 13210 T,
K. DeBoer, Director Technol ogi cal Devel opment Programs New York State Energy Office Agency Building 2 Empire State Plaza
- Albany, New York.12223 Resident Inspector Nine Mile Point Nuclear Power Station P. 0.
Box 126
- Lycoming, New York 13093 Ezra I. Bialik Assistant Attorney General Environmental Protection Bureau New York State Department of Law 2 World Trade Center New York, New York 10047
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Enclosure 1
Attendees List March 6, 1981 NRC Staff Niagara Mohawk, K. Kiper D. geng
, N. Chokshi F,. Schauer L. Yang G. Amdt H. Graves G. Gallagher P. Francisco K. Ward Stone and Webster R. Carpenito A. Shah Dyckerhoff and Widmann Inc.
H. Nierlich M. Tang
MAR 2 6 1981
Meeting Summary March 24, 1981 DISTRIBUTION Central Files TERA GIB Reading F. Schroeder K. Kniel, with enclosure.2'.
Norian, with enclosure 2
D. Eisenhut R. Tedesco B. Youngblood A. Schwencer R. Vollmer J. Knight R. Bosnak F. Schauer D. Ross L. Rubenstein W. Butler, with enclosure 2
J. Kudrick, with enclosure 2
F. Eltawila, with enclosure 2
T.
Su C. Grimes C. Anderson, with enclosure 2
M. Fields, with enclosure 2
R. Mattu S. Fabic J. Wilson T. Lee S.
Hou K. Kiper R. STark D. Lynch A. Bournia D. Sells I. Peltier NRC PDR Local PDR ACRS (16)
OELD OSD 3