ML20065H620

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Responds to Mechanical Engineering Branch 820618 Request for Addl Info.Response Includes Prying Effect on Concrete Expansion Anchor Bolts Due to Pipe Support Base Plate Flexibility. Draft Responses Submitted 820728
ML20065H620
Person / Time
Site: Seabrook  NextEra Energy icon.png
Issue date: 09/30/1982
From: Devincentis J
PUBLIC SERVICE CO. OF NEW HAMPSHIRE, YANKEE ATOMIC ELECTRIC CO.
To: Kerrigan J
Office of Nuclear Reactor Regulation
Shared Package
ML20065H623 List:
References
SBN-337, NUDOCS 8210050199
Download: ML20065H620 (3)


Text

PUEKJC BERVICE Ccumof New Hempehir e

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1671 Worcesser Road Framinghom, Massachveetts 01701 (617) . 872 8100 Septembe r 30, 1982 SBN- 337 T.F. B 7.1.2 1

United States Nuclear Regulatory Commission Washington, D. C. 20555 Attention: Ms. Janis 3. Kerrigan, Acting Chief Licensing Branch 3 Division of Licensing  !

Re f erence s: (a) Construction Permits CPPR-135 and CPPR-136, Ibcket Nos. 50-443 and 50-444 (b) USNRC Letter, dated June 18, 1982, " Request for Additionti Information - Mechanical Engineering Branch",

F. J. Miraglia to W. C. Tallraan

Subject:

Response t > 210 Series RAIs; (Mechanical Engineering Branch)

Dear Ms. Kerrigtn:

We have enclosed responses to the subject Roquests for Additional Information (RAIs) which you forwarded in Reference (b). These are:

210.70, 2l0.71, 210.72, 210.73, 210.74, 210.75, 210.76, 210.77, 210.78, 210.79, 210.80, 210.81, 210.82, 210.86, 210.87, 210.88, 210.89 A draf t version of the majority of the above responses was submitted to the Project Manager, Mr. Louis Wheeler, on July 28, 1982.

The outstanding responses (210.83, 210.84, 2l0.85)'will be submitteJ in the near future.

Very truly yours, YANKEE ATOMIC ELECTRIC COMPANY J. DeVincentis Project Manager 00/

ALL/dd Enclosure s 8210050199 820930 PDR ADOCK 05000443 A PDR

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JUL 16 RAI 210.70 The analysis of base plates shown in your submittal of July 6,1979 includes a flexibility factor of 1.2. Provide the basis for this factor.

RESPONSE

a. Enclosed.(Exhibit 210.70-1) is a copy of the report "Prvine F.ffect on Concrete Expansion Anchor Bolts Due to Pipe Support Bas ~e Plate

,_ Flexibility" which was the basis for the prying factor value of 1.2.

b. Testing of Hilti Bolted plates indicates that the prying effect is negligible. The prying effect is noticeable only within the design load limits. The ultimate capacity of bolts is .'not affected by prying.

Partial results of these tests are enclosed as Exhibit 210.70-2. The final test report is expected to be available in September 1982, s

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