ML20132D885

Approves Use of Damping Valves in ASME Code Case N-411 as Alternate to Guidance in Reg Guide 1.61 for Hydrodynamic & Seismic Loads,Per 850624 Request

ML20132D885
Person / Time
Site:	Clinton
Issue date:	07/19/1985
From:	Butler W Office of Nuclear Reactor Regulation
To:	Spangenberg F ILLINOIS POWER CO.
References
RTR-REGGD-01.061, RTR-REGGD-1.061 NUDOCS 8508010510
Download: ML20132D885 (4)

Text

.-

_y[' g UNITED STATES NUCLEAR REGULATORY COMMISSION j L j WASHINGTON, D. C. 20555

%%****] JUL 191985 Docket No. 50-461 Mr. Frank A. Spangenberg Director of Nuclear Licensing &

Configuration Management I

Clinton Power Station P.O. Box 306 Mail Code V920 Clinton, Illinois 61727

SUBJECT:

USE OF ASME CODE CASE N-411 FOR THE CLINTON POWER STATION UNIT N0. 1, DOCKET l0. 50-461

References:

1. Letter from F. A. Spangenberg, Illinois Power Company to W. R. Butler dated June 24, 1985,

Subject:

Use of Alternate Damping Values ASME Code Case N-411

2. Letter from A. Schwencer (NRC) to F. A. Spangenberg, Illinois Power Company dated April 5,1985,

Subject:

lise of ASME Code Case h-397 and N-411 for Clinton Power Station, Unit 1

3. Letter from F. A. Spangenberg, Illinois Power Company, to A. Schwencer dated March 20, 1985,

Subject:

Use of Alternate Damping Values ASl4E Code Case N-411 The staff has completed its review of your request for authorization to use the damping values of ASME Code Case N-411 as an alternate to the guidance in Regulatory Guide 1.61 for hydrodynamic loads as well as seismic loads as dis-cussed in Reference 1. 1 In our April 5,1985 response (Reference 2) to your original request (Reference

3) the staff stated, "It is the staff's position that this Code Case is only applicable to response spectrum seismic analyses for piping. Therefore, any application involving non-seismic loads is not acceptable at this time." '

Subsequently, on May 13, 1985 the Pressure Vessel Research Council (PVRC) technical committee on piping systems met and discussed the applicability of the damping values specified in Code Case N-411 to any building filtered response spectrum load. The committee voted unanimously in favor of such l applications. As a result of this decision the staff now finds that your request to use the damping values of Code Case N-411 for hydrodynamic loads as l

8508010510 850719 l ADOCK 05000461 '

PDR A PDR _

+ '. .

• well as seismic loads to be acceptable for use at the Clinton Power Station Unit 1. It should be noted, however, that the damping values in Code Case

' N-411 are limited to a response frequency below 33 Hz.

In addition, use of the Code Case should be documented in a future Amendment to the FSAR.

If you have any questions regarding this issue please contact the licensing project manager for your application.

Sincerely.

/

Walter R. Butler, Chief Licensing Branch No. 2 Division of Licensing cc: See next page '

i 4

l I

i

lJ 4

well as seismic loads to be acceptable for use at the Clinton Power Station Unit 1. It should be noted, however, that the damping values in Code Case N-411 are limited to a response frequency below 33 Hz.

i-In addition, use of the Code Case should be documented in a future Amendment to the FSAR.

If you have any questions regarding this issue- please contact the licensing project manager _ for your application.

~

Sincerely, 1

~ Original signed by I'

l .W alter R. Butler, Chief 1 Licensing Branch.No. 2' Division of Licensing

-cc: 'ee next page

! DISTRIEUfION 4

EmmstTIT.T .

NRC PDR f Local PDR i PRC' System NSIC

! LB#2 Reading i EHylton

< BSiegel

Goddard,0 ELD ACRS (16)

! JPartlow

]'~ BGrimes Edordan

RKirkwood J

JBrarmier RBosnak

, FCherney i

j f f i LB#2 / -- LBf2/DL/BC '

i i BST 1- WButler 'j t

OT[ 07/ /85-o.

? ,

,_. ._,e-.

m. . . .

, hr. Frank A. ,Spangenberg 'n ton Power Station Illinois Pcter Company Lo'. 1

-cc:

Mr. Allen Samuelson, Esquire Jean Foy, Esquire z Assistant Attorney General .

511 W. Nevada

'Envircomental Control Division Urbana, Illinois 61601 Southern Region 500 South Second Street Richard B. Hubbaru Springfield, Illinois 62706 Vice President Technical Associates Mr. D. P. Hall 1723 Hamilton Ave. - Suite K Vice President San Jose,-CA 95125 Clinton Power Station P. 0.'Cox 678 Clinton, Illinois, 61727 .

!!r. H. R. Victor ..

Manager-14uclear Station Ergineering Dpt.

Clinton Power Station

.P. O. Box 678 Clinten, Illinois- 61727 Sheldon Zabel Esquire Schiff, harpin & Ucite 7200 Sears Tower 233 Wacker Drive Chicago, Illinois 6000t 4 Resident Inspector U. 5. Nuclear Regulatory Commission RR 3, Ecx 229 A ]

Clinton, Illinois 61727 Mr. R. C. Heider .

Project Manager Sargent & Lundy Engineers '

55 East Monroe Street Chicago, Illinois 60E03 Mr. L. Larsen Project hanager General Electric Con.pany 175 Curtner Avenue, N/C 395 San Jose, California 95125 Regional Administrator, Region III 799 Roosevelt Road Glen Ellyn, Illinois 60137-l l

.