ML20206H182

Forwards RAI Re Licensee Request for Relief from Certain ASME Code ISI Requirements Submitted by .Response Requested within 30 Days of Receipt of Ltr

ML20206H182
Person / Time
Site:	Callaway
Issue date:	05/06/1999
From:	Mel Gray NRC (Affiliation Not Assigned)
To:	Randolph G UNION ELECTRIC CO.
References
TAC-MA2312, NUDOCS 9905110082
Download: ML20206H182 (4)

Text

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.g Mr.'G'arry L' Randolph'

- Vice President and Chief Nuclear Officer 1

- Union Electric Company Post Office Box 620 Fulton, Missouri 65251'

SUBJECT:

REQUEST FOR ADDITIONAL INFORMATION (RAl) - UNION ELECTRIC COMPANY - CALLAWAY NUCLEAR PLANT, UNIT 1 (TAC NO. MA2312) -

Dear Mr. Randolph:

The NRC staff has reviewed Union Electric Company's request for relief from certain American Society of Mechanical Engineers (ASME) Code inservice inspection requirements submitted by letter dated July 10,1998. The staff has determined that additional information is needed to

. complete our review.. The information required is detailed in the enclosure.

- These questions were discussed with your staff on April 20,1999. To assist the NRC staff in meeting its review schedule, we request that you respond to this request for additional information in writing as soon as possible, but within 30 days of receipt of this letter.

If you have any questions, please contact me at (301) 415-3021.

Sincerely,

/s/

Mel Gray, Project Manager, Section 2 Project Directorate IV & Decommissioning -

Division of Licensing Project Management Office of Nuclear Reactor Regulation Docket No. 50-483 DISTRIBUTION:

Docket File ACRS, TWFN

Enclosure:

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Mr. Garry L. Randolph Vice President and Chief Nuclear Officer Union Electric Company '

Post Office Box 620 Fulton, Missouri 65251

SUBJECT:

REQUEST FOR ADDITIONAL INFORMATION (RAI)- UNION ELECTRIC COMPANY - CALLAWAY NUCLEAR PLANT, UNIT 1 (TAC NO. MA2312)

Dear Mr. Randolph:

The NRC staff has reviewed Union Electric Company's request for relief from certain American Society of Mechanical Engineers (ASME) Code inservice inspection requirements submitted by letter dated July 10,1998. The staff has determined that additional information is needed to complete our review. The information required is detailed in the enclosure.

These questions were discussed with your staff on April 20,1999. To assist the NRC staffin meeting its review schedule, we request that you respond to this request for additional information in writing as soon as possible, but within 30 days of receipt of this letter, if you have any questions, please contact me at (301) 415-3021.

Sincerely,

/

MJ Mel Gray, Project Manager, Section 2 Project Directorate IV & Decommissioning Division of Licensing Project Management Office of Nuclear Reactor Regulation Docket No. 50-483

Enclosure:

Request for Additional Information cc w/ enclosure: See next page l

L l

l i

Callaway Plant, Unit 1 cc: .

Professional Nuclear - Mr. Otto L. Maynard Consulting, Inc. President and Chief Executive Officer 19041 Raines Drive Wolf Creek Nuclear Operating Corporation Derwood, Maryland 20855 Post Office Bnx 411 Burlington, Kansas 06839 John O'Neill, Esq.

Shaw, Pittman, Potts & Trowbodge Mr. Dan 1. Bolef, President 2300 N. Street, N.W. . Kay Drey, Representative Washington, D.C. 20037 Board of Directors Coalition for the Environment Mr. H. D. Bono 6267 Delmar Boulevard Supervising Engineer University City, Missouri 63130 Quality Assurance Regulatory Support Union Electric Company Mr. Lee Fritz Post Orfice Box 620 Presiding Commissioner Fulton, Missouri 65251 Callaway County Court House 10 East Fifth Street U.S. Nuclear Regulatory Commission Fulton, Missouri 65151 Resident inspector Office 8201 NRC Road Mr. Alan C. Passwater, Manager Steedman, Missouri 65077-1302 Licensing and Fuels Union Electric Company Mr. J. V. Laux, Manager Post Office Box 66149 Quality Assurance - St. Louis, Missouri 63166-6149 Union Electric Company Post Office Box 620 Fulton, Missouri 65251 Manager- Electric Department Missouri Public Service Commission 301 W. High Post Office Box 360 Jefferson City, Missouri 65102 Regional Administrator, Region IV U.S. Nuclear Regulatory Commission Harris Tower & Pavilion 611 Ryan Plaza Drive, Suite 400 Arlington, Texas 76011-8064 Mr. Ronald A. Kucera, Deputy Director Department of Natural Resources P.O. Box 176 Jefferson City, Missouri 65102 l

REQUEST FOR ADDITIONAL INFORMATION UNION ELECTRIC COMPANY 1

CALLAWAY PLANT. UNIT 1 DOCKET NO. 50-483 SECOND INSERVICE INSPECTION INTERVAL RELIEF REQUESTS By letter dated July 10,1998, Union Electric Company (UE) submitted for NRC staff review and 1 approval Relief Requests ISI-13, ISl-14, IS-15, ISI-16, ISl-17, and 1S1-18. The following I' questions relate to Relief Request ISl-16.

1. Relief Request ISI-16 requests relief from the 100% volumetric examination requirement .

for the residual heat removal (RHR) suction to reactor coolant system (RCS) loop 1 cold l leg branch connection, Weld 2-BB-01-S302-3. Should this weld be categorized as an l item B9.31 (branch connection) weld? 1

2. The submitta. states that a composite coverage of 23.35% of the weld volume was achieved with no credit taken for examinations in the circumferential direction (for flaws transverse to the weld). However, a previously approved relief request for this weld during the Callaway Plant, Unit 1 first ten year interval inservice inspection implied a 75% composite volumetric examination coverage with 100% of the volume examined with a 45 degree refracted longitudinal wave transducer in two beam path directions for l reflectors transverse to the weld seam. (Reference Relief Request S-1, NRC Safety  ;

Evaluation for First Ten Year Interval Insarvice inspection Program Plan, provided to UE in NRC letter dated March 25,1995) Please explain this reduction in coverage and discuss how the reduced coverage will provide reasonable assurance of quality and safety.

3. In the July 10,1998 submittal, the conclusion is made that the ASME Code requirement is impractical to perform. The information provided in Relief Request ISI-16 does not adequately support the reduced composite examination coverage of 23%. Please provide information, with sketches if necessary, describing the limitations associated with this examination.

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