ML20199F265

Forwards Request for Addl Info Re Resolution of USI A-46. Encl RAI Revises Questions Contained in NRC . Response Requested within 60 Days

ML20199F265
Person / Time
Site:	Duane Arnold
Issue date:	11/18/1997
From:	Kelly G NRC (Affiliation Not Assigned)
To:	Leslie Liu IES UTILITIES INC., (FORMERLY IOWA ELECTRIC LIGHT
References
REF-GTECI-A-46, REF-GTECI-SC, TASK-A-46, TASK-OR TAC-M69444, NUDOCS 9711240166
Download: ML20199F265 (5)

Text

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. . -1 November 18, 1997 I Mr. Lee Liu l Chairman of the lloard and Chief Executive Officer IES Utilities Inc.  !

200 First Street, SE. i P.O. Box 351 I (j s Cedar Rapids,IA 52406 0351 l

SUBJECT:

DUANE ARNOLD ENERGY CENTER - REVISED REQUEST FOR * [

$ ' ADDITIONAL INFORMATION FOR RESOLUTION OF USI A-46 (M69444) i

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Dear Mr. Liu:

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, ' g'On Octkber 29,1997, the NRC issued a Request for m ,

AdditionaljJl Inform y., e information needed to resolve USI A-46 for the Duane Amold Energy Center (DAEC).1 ; > '

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• Subseque'ntly the NRC staff dctermined that it needed to revise these questions and verbally l'

notified DAEC that new questions would be forthcoming. The revised questions are enclosed.

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Please provide your response within 60 days so that the NRC can complete its review promptly. -

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y if you have any questions about our review, please contact me at (301) 415 3028. ;1 4-

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jf u, This request for information affects fewer than 10 respondentst therefore, OMB clearance is not  ; A required under Pub. L. 96 511. >

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Sincerely,

, e originalsigned by .[,

Glenn 11. Kelly, Senior Project Manager -

Project Directorate 1113 Division of Reactor Projects lil/IV Office of Nuclear Reactor Regulction Docket No. 50-331

Enclosure:

Request for Additionalinformation ec w/ encl: See next page i

Distribution: .,

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Novenb:r 18, 1997 hit. Lee 1.iu Chairman of the lloard and Chief Executive Omcer IES Utilities Inc. ,

200 First Street, SE.

P.O. Box 351 Cedar Rapids,IA 52406 0351

SUBJECT:

DUANE ARNOLD ENERGY CENTER - REVISED REQUEST FOR ADDITIONAL INFORhtATION FOR RESOLUTION OF USl A-46 (hi69444)

Dear hir. Liu:

On October 29,1997, the NRC issued a Request for Additional Information (RAI) seeking information needed to resolve UEl A-46 for the Duane Arnold Energy Center (DAEC).

Subsequently, the NRC staff determined that it needed to revise these questions and verbally notified DAEC that new questions would be forthcorning. The revised questions are enclosed.

Please provide your response within 60 days so that the NRC can complete its review promptly.

If you have any questions about our review, please contact me at (301) 415 3028.

This request for information affects fewer than 10 respondents; therefore, OhtB elcarance is not required under Pub. L. 96 511.

Sincerely, originalsigned by Glenn B. Kelly, Senior Project hianager Project Directorate 1113 Division of Reactor Projects lil/IV Omce of Nuclear Reactor Regulation Docket No. 50 331

Enclosure:

Request ihr AdditionalInformation cc w/cncl: See next page Distribution:

Docket File PUBLIC PDill-3 IUF ACRS GGrant, Rlli EAdensam (EGAl) liAsher CWu OGC,0151118 RSavio RWessman G:\DUANEARN\69444RAJ.WPD

'CFFICE PM:PDill-L E LA:PDill 3 ,E NViE GKellyMJT CBoyle__ % D DATE 11/]5/97 11/ f(/97 "

0FFICIAL RECORD COPY

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p* ,.. .. .,\ UNITED STATES s* ," NUCLEAR REGULATORY COMMISSION

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%***** November 18, 1997 L

Mr. Lee Liu Chairman of the Board and Chief Executive Officer IES Utilities Inc.

200 First Street, SE.

P.O. Box 351 i

Cedar Rapids,IA 52406-0351

SUBJECT:

DUANE ARNOLD ENERGY CENTER - REVISED REQUEST FOR ADDITIONAL INFORMATION FOR RESOLUTION OF USI A-46 (M69444)

Dear Mr. Liu:

On October 29,1997, the NRC issued a Request for Additional Information (RAI) seeking information needed to resolve USl A-46 for the Duane Arnold Energy Center (DAEC).

Subsequently, the NRC staff determined that it needed to revise there questions and verbally notified DAEC that new questions would be forthcoming. The revised questions are enclosed.

Please provide your response within 60 days so that the NRC can complete its review promptly.

If you have any questions about our review, please contact me at (301) 415 3028.

This request for information afTects fewer than 10 respondents; therefore, OMB clearance is not required under Pub. L,96 511.

Sincerely, Glenn B. Kelly, Senior Project Manager Project Directorate 111-3 Division of Reactor Projects lil/IV Office of Nuclear Reactor Regulation Docket No. 50 331

Enclosure:

Request for AdditionalInformation ec w/ encl: See next page

)

i

• Lee Liu ' Duane Arnold Energy Center )

IES Utilities Inc. ]

cc:

Jack Nonman, Esquire  !

Kathleen H. Shea, Esquire ,

Morgen, Lowls, & Socklus >

1800 M Street, NW. l Washington, DC 20036 5869 i Chairman, Linn County  !

Board of Supervisors i Cedar Rapids,lA 52406 IES Utilities Inc.

ATTN: Gary Van Middlesworth 1 Plant Superintendent, Nuclear  !

3277 DAEC Road Pa!o,IA 52324 .

John F. Franz, Jr. ,  !

Vice President, Nuclear [

Duane Arnold Energy Center 3277 DAEC Road Palo, IA 52324 '

i Ken Poveler _

Manager of Regulatory Performance '

Duane Amold Energy Center 3277 DAEC Road Palo,IA 52324 U.S. Nuclear Regulatory Commission  ;

~

i Resident inspector's Office Rural Route #1 Palo,IA 52324 Regional Administrator, Rill i U.S. Nuclear Regulatory Commission 801 Warrenville Road Lisle, IL 60532-4531 Parween Belg Ut;lities Division towa Department of Commerce

Lucas Office Building 5th floor Des Moines, IA 50319 L

I

4 4

, REQUEST FOR iJDJIJONAL INFORMATION

- DUANE ARN010 ENERGY CENTER US1 A-46

]

i

References:

1. Letter from John Franz (DAEC) to NRC, " Response to NRC  ;

Request for Additional Information - Resolution of USI A-  !

46." dated August 30, 1996. l

2. Letter from John Franz (DAEC) to NRC. Response to NRC l Request for Additional Information - Resolution of USI A- )

46." dated July 2, 1996;

1. On pages 46 and 47 of Addendum 7 of Reference 1. you have provided a .

Table shuwing the elevations (in safety related structures) where the' in structure response spectra (IRS) exceeds the corresponding (at the same damping value) reference spectra (1.5 times the bounding spectrum).

Referring to your response to Question 6 in Reference 2, we believe that you have evaluated the equipment and their Mchorages using the IRS when ,

the equipment frequencies are less than 8 Hz. (a) For the equipment  !

(within 40 feet above the effective grade) with fundamental frequencies >

above 8 Hz, provide the method (s) used for their evaluation where the ,

i IRSs exceed the corresponding reference spectra at frequencies above 8 Hz. (b) If Method A in Table 41 of the GIP-2 was used provide your technical justification for not following the GIP limitation on the use of Method A in Section 4.2.3 when the ground spectrum times 1.5 is less than the IRSs for elevations within 40 feet above the grade level.

2. In evaluating the raceway supports, a recent audit of a GIP-2 plant indicated that some licensees may be misusing the " ductile support" -

definition of Figure 8 7 of GIP 2 to avoid the check for lateral seismic loads. In this context, please provide the following information: (a) the number of supports (percentage of the total number of supports evaluated in the limitec analytical review) considered as ductile. (b) the specific criteria used in deternhning that the supports are ductile, and (c) the extent to which the supports (that do not mcet the vertical capacity check) and their anchorages will deform under the two

- horizont&l components of the design basis earthquake.

Enclosure  :

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