ML20129B583

Ack Receipt of 951115 Summary Rept for Resolution of USI A-46.Addl Info Requested.List of Questions Also Encl

ML20129B583
Person / Time
Site:	Duane Arnold
Issue date:	10/21/1996
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 9610230054
Download: ML20129B583 (5)

Text

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October 21, 1996 Mr. Lee Liu Chairman of the Board, President, J, and Chief Executive Officer  ?"gg IES Utilities Inc.

200 First Street, SE Cedar Rapids, IA 52406-0351

SUBJECT:

DUANE ARNOLD ENERGY CENTER - REQUEST FOR ADDITIONAL INFORMATION ON RESOLUTION OF USI A-46, DUANE ARNOLD ENERGY CENTER (TAC NO. M69444)

Dear Mr. Liu:

On November 15, 1995, the IES Utilities Inc., (licensee) submitted a summary report for resolution of USI A-46. The staff has reviewed this summary and has developed additional questions, which are enclosed. Please provide your responses to these questions within 60 days of the date of this letter.

Sincerely, Original signed by:

Glenn B. Kelly, Sr. Project Manager Project Directorate III-3 Division of Reactor Projects III/IV Office of Nuclear Reactor Regulation Docket No. 50-331

Enclosure:

Request for Additional Information cc w/ encl: See next page Distribution:

Docket File PUBLIC PDIII-3 R/F ACRS CThomas JCaldwell, RIII OGC, 015B18 GMarcus GGalletti JRoe EAdensam (E)

G:\DUANEARN\DUA69444.RAJ.

To receive a copy of this document, indicate in the box: "C" - Copy without attachment / enclosure "E" = Copy with attachment / enclosure "N" - No copy 0FFICE LA:PDIII-3 lE PM:PDIII-3 l ec NAME DFoster-Curseen GKelly:am'Mt

_DATE O//7/96 (J-L /v/r7/96

0FFICIAL RECORD COPY ONl,t 230020 f

l 9610230054 961021 PDR ADUCK 0500 1 h hk hhh

October 21, 1996 Mr. Lee Liu Chairman of the Board, President, and Chief Executive Officer IES Utilities Inc.

200 First Street, SE Cedar Rapids, IA 52406-0351

SUBJECT:

DUANE ARNOLD ENERGY CENTER - REQUEST FOR ADDITIONAL INFORMATION

' ON RESOLUTION OF USI A-46, DUANE ARNOLD ENERGY CENTER (TAC NO. M69444)

Dear Mr. Liu:

2 On November 15, 1995, the IES Utilities Inc., (licensee) submitted a summary report for resolution of USI A-46. The staff has reviewed this summary and has developed additional questions, which are enclosed. Please provide your responses to these questions within 60 days of the date of this letter.

, Sincerely, j

Original signed by:

Glenn B. Kelly, Sr. Project Manager Project Directorate III-3 Division of Reactor Projects III/IV Office of Nuclear Reactor Regulation 1 Docket No. 50-331

Enclosure:

Request for Additional Information l

)

cc w/ encl: See next page I Distribution: '

1 Docket File PUBLIC PDIII-3 R/F ACkS CThomas JCaldwell, RIII OGC, 015B18 GMarcus GGalletti JRoe EAdensam (E)

G:\DUANEARN\DUA69444.RAJ To receive a copy of this document, indicate in the box: "C" - Copy without attachment / enclosure "E" - Copy with attachment / enclosure "N" - No copy 0FFICE LA:PDIII-3 lE PM:PDIII-3,1 e' I NAME DFoster-Curteen GKelly:anVM(

DATE O//7/96 (J-L tr/p/96

0FFICIAL RECORD COPY

. .. . . = . - _ . - . . . . - . .

Mr. Lee Liu Duane Arnold Energy Center IES Utilities Inc.

cc:

Jack Newman, Esquire Kathleen H. Shea, Esquire Morgan, Lewis, & Bockius 1800 M Street, NW.

Washington, DC 20036-5869 Chainnan, Linn County Board of Supervisors Cedar Rapids, Iowa 52406 IES Utilities Inc.

ATTN: Gary Van Middlesworth Plant Superintendent, Nuclear 3277 DAEC Road i Palo, Iowa 52324 l

Mr. John F. Franz, Jr.  ;

Vice President, Nuclear )

Duane Arnold Energy Center '

3277 DAEC Road )

Palo, Iowa 52324 )

Mr. Ken Peveler ,

Manager, Nuclear Licensing '

l Duane Arnold Energy Center

-3277 DAEC Road Palo, Iowa 52324 U. S. Nuclear Regulatory Commission Resident Inspector's Office Rural Route #1 Palo, Iowa 52324 Regional Administrator, RIII U. S. Nuclear Regulatory Commission  !

801 Warrenville Road 1 Lisle, Illinois 60532-4531 Ms. Parween Baig  !

Utilities Division Iowa Department of Commerce Lucas Office Building, 5th floor Des Moines, Iowa 50319

,. .. }

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REQUEST FOR ADDITIONAL INFORMATION VERIFICATION OF SEISMIC ADEOUACY OF MECHANICAL AND' ELECTRICAL EOUIPMENT IN OPERATING REACTORS DATED NOVEMBER 15. 1995 DUANE ARNOLD ENERGY CENTER i

1. Section 4, " Safe Shutdown Equipment List (SSEL)," of the Seismic  !

Evaluation Report, dated November 15, 1995, states in part the following:

)

"The formal Operations Department review of the SSEL was I conducted by an Operations Shift Supervisor at DAEC. The method of this review was a " desk top" review, per Section 3.7 of the GIP

[ Reference 1], using normal and emergency procedures shown in table 4-1."

"This review indicated that the shutdown path selected for USI A-46 and included in the SSEL is a legitimate safe shutdown path consistent with DAEC procedures and operator training. The present level of operator training is sufficient to assure that the operators are proficient on the procedures to assure the selected success path will be used."

"In reviewing the procedures against the Safe Shutdown Equipment list, no major equipment (pumps, valves, fans) that was required by plant procedures to meet the safe shutdown path were missing.

Support equipment such as relays, handswitches, instrumentation, and heat exchangers were not verified by this review."

Based on this review, (a) describe what, if any, reviews were performed to determine if any local operator actions required to safely shutdown the reactor could be affected by potentially harsh environmental conditions resulting from the design basis earthquake (DBE)? (b) Are there any other environmental conditions (such as loss of lighting, excessive heat or humidity, or in-plant barriers) as a result of the DBE and loss of cff-site power which could negatively affect operator's ability to respond to the transient? If so, describe the reviews that were conducted to ensure operators had adequate time and resources to respond to such events? (c) Describe how you ensured that sufficient operator resources were available, including consideration of environmental factors, to carry out any required operator actions associated with the additional support equipment not specifically verified by this review .

2. Section 2.1, " Summary of Results," of the Relay Evaluation Report states that a total of five SSEL equipment items would require operator actions to reset the associated contacts or contact groups. Three of those were associated with the CRHVAC/ Battery room exhaust fans and two others were associated with the CRHVAC/ Control Building Chillers. In both cases it appears that ample indications of system abnormality would be available to the operators as well as procedural guidance necessary to reset the effected equipment. (a) Based your analysis, approximate how much time would the operators have to reset the affected equipment assuming contact chatter? (b) Describe the review conducted to ensure that no adverse environmental conditions postulated to exist following the DBE would prevent the local operator actions required to reset the Control Building Chillers. ,

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3. Are the operator actions associated with resetting the SSEL equipment affected by the postulated contact chatter considered to be routine and consistent with the skill of the craft? If not, what operator training and operational aids were developed to ensure the operators will perform the actions required to reset the affected equipment?

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