ML20028A131
| ML20028A131 | |
| Person / Time | |
|---|---|
| Site: | Seabrook  |
| Issue date: | 11/10/1982 |
| From: | Devincentis J PUBLIC SERVICE CO. OF NEW HAMPSHIRE, YANKEE ATOMIC ELECTRIC CO. |
| To: | Knighton G Office of Nuclear Reactor Regulation |
| References | |
| SBN-362, NUDOCS 8211160459 | |
| Download: ML20028A131 (4) | |
Text
PUEBLIC BERVICE SMON STAM e
-44 om.:
Companyof New Hampshir e 1671 Worcester Road Framingham, Mossochusetts 01701 (617) - 872-8100 November 10, 1982 SBN-362 T.F. B7.1.2 United States Nuclear Regulatory Commission Washington, D. C. 20555 Attention:
Mr. George W. Knighton, Chief Licensing Branch 3 Division of Licensing
References:
(a) Construction Permits CPPR-135 and CPPR-136, Docket Nos. 50-443 and 50-444 (b) USNRC Letter, dated June 18, 1982, " Request for Additional Information - Mechanical Engineering Branch,"
F. J. Miraglia to W. C. Tallman
Subject:
Response to RAI 210.83, 210.84, and 210.85; (Mechanical Engineering Branch)
Dear Sir.
We have enclosed responses to the subject Requests for Additional Information (RAIs) which were forwarded in Reference (b).
The enclosed RAI responses will be included in OL Application Amendment 48.
Very truly yours, YANKEE ATOMIC ELECTRIC COMPANY
. /w J. DeVincentis Project Manager ALL/ f sf ol go 8211160459 821110 PDR ADOCK 05000443 A
RAI 210.83 Tha staff has reviewed the applicant's response to Q210.64 regarding the use of th3 overlap technique in certain piping system analyses and has found the response to be inadequate. The applicant has not satisfied a required criterion in the cpplication of the analytical technique as stated in NUREG/CR-1980. This criterion specifies that the envelope of the anchor-to-anchor response spectra be applied to each of the sub-problems when performing the dynamic analysis, unless it can be shown that the overlap regions effectively decouple the adjacent cub-problems.
Th2 applicant'is requested to submit the following information For isometric piping CS system line 303 (drawing 9763-D-8-3931 Revision 1),
prr. vide a conparison of maximum stresses and all support loads fort c) the full anchor-to-anchor problem with applicable envelope response spectra, and b) the overlapped sub-problems with the response spectra used by the applicant for each spb-problem.
RESPONSE
The CS system piping, line 303, has been rerouted. A re-analysis will be parformed on a: larger version of ADLPIPE. Consequently, the overlapping ecchnique presimted in the response to RAI 210.64 for main run piping systems willnotbeusM.
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RAI 210.84_
The staff has reviewed tha applicant's response to Q210.65 regarding the criteria used to assure functional capability of ASME Code Clas (emergency) limits assures the functional capability of piping is not valid piping systems.
Thus we for stainless steel albows in ASME Claea 2 and 3 piping systems.For detailed staff comments find the applicant's response to be inadequate.
on the Seabrook functional capability criteria, see Attachment A210.84.
Tha staff has accepted the use of the functional capability criteria given in General Electric's topical report. " Functional Capability Criteria for I
The staff Eccential Mark II piping" (ItEDO-21985) dated September 1978.
hao also found the Westinghouse criteria used in the Comanche Peak facility to be acceptable.
Provide further justification for assurir,g the functional capability of stainless oteel albove in ASME Class 2 and 3 piping systems.
RESPONSE
As part of the design documentation for the Seabrook plant, UE&C has avalu i
in the the stress levels of the A5HE Class 2 and 3 stainlass steel albows following piping systemas Safety Injection Chemical.and Volume Control (ChargiEg" Portions)
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Residual Heat Ramsval Contaitsment Speay The review of 100% of the elbows in each of the systems identified elbows which exceeded the functional capability criteria defined in General Corrective action requir'ed to meet the Electric document NED0-21985.
functional limit will be taken.
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210.85 The staff has reviewed the document identified as 52212-9, " Seismic Analysis, Containment Spray Pumps, 6K10X148B-CD, ASME Section III Class 2 " (Bingham-Willamette) Rev. 5, dated 1/3/79.~ Page 3 of this document includes the
" Pressure boundary parts comply with the requirements of the ASME sentence:
Boiler and Pressure Vessel Code,Section III and NRC Regulatory Guide 1.48."
Please furnish the appropriate design checks (Code NC-3400) that substantiate the quoted sentence.
RESPONSE
The requested design checks will be provided by Dec. 15, 1982 to the NRC.
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