ML20206K651

Forwards RAI Re GL 96-06, Assurance of Equipment Operability & Containment Integrity During Design-Basis Accident Conditions

ML20206K651
Person / Time
Site:	Callaway
Issue date:	05/10/1999
From:	Mel Gray NRC (Affiliation Not Assigned)
To:	Randolph G UNION ELECTRIC CO.
References
GL-96-06, GL-96-6, TAC-M96791, NUDOCS 9905130230
Download: ML20206K651 (4)

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May 10, 1999

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

- Post Office Box 620 Fulton, MI 65251.

SUBJECT:

REQUEST FOR ADDITIONAL INFORMATION - GENERIC LETTER 96-06, ASSURANCE OF EQUIPMENT OPERABILITY AND CONTAINMENT INTEGRITY DURING DESIGN-BASIS ACCIDENT CONDITIONS," CALLAWAY I PLANT, UNIT 1 (TAC NO. M96791)

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Dear Mr. Randolph:

j b By letter dated October 17,1997, Union Electric Company (UE) provided additional information to the NRC staff regarding its analysis of the waterhammer and two-phase flow issues discussed in Generic Letter (GL) 96-06. The staff has determined that additional information is ,

required to complete our review. TNs information request was discussed with UE staff i members on April 27,1999. A 30-day response time from the date UE receives this letter was agreed upon. 4 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

Enclosure:

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,g,, # May 10,1999 Mr. Gany L. Randolph Vice President and Chief Nuclear Officer Union Electric Company Post Office Box 620 Fulton, MI 65251

SUBJECT:

REQUEST FOR ADDITIONAL INFORMATION - GENERIC LETTER 96-06,

" ASSURANCE OF EQUIPMENT OPERABILITY AND CONTAINMENT INTEGRITY DURING DESIGN-BASIS ACCIDENT CONDITIONS," CALLAWAY PLANT, UNIT 1 (TAC NO. M96791) l

Dear Mr. Randolph:

By letter dated October 17,1997, Union Electric Company (UE) provided additional information to the NRC staff regarding its analysis of the waterhammer and two-phase flow issues discussed in Generic Letter (GL) 96-06. The staff has determined that additional information is l required to complete our review. This information request was discussed with UE staff members on April 27,1999. A 30-day response time from the date UE receives this letter was agreed upon.

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

Sincerely, b

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 AdditionalInformation cc w/ encl: See next page

m- ]

"' ' ~ Callaway Plant, Unit 1 cc w/ encl:

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 Box 411 Burlington, Kansas 66839 John O'Neill, Esq.

Shaw, Pittman, Potts & Trowbridge Mr. Dan I. 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 Regulatoy Support

. Unen Electric Company Mr. Lee Fritz i Post Office 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

' REQUEST FOR ADDITIONAL INFORMATION 1

REGARDING RESPONSE TO GENERIC LETTER 96-06

" ASSURANCE OF EQUIPMENT OPERABILITY AND CONTAINMENT INTEGRITY DURING DESIGN-BASIS ACCIDENT CONDITIONS' UNION ELECTRIC COMPANY CALLAWAY PLANT. UNIT 1 ,

l DOCKET NO. 50-483

1. By letter dated October 17,1997, UE provided to the NRC a copy of Altran Report 96225-TR-02. This report concluded that the column closure waterh1mmer that results from a loss of offsite power (LOOP) without a loss of coolant accident (LOCA) is the limiting case. The Altran report references 'Callaway Waterhammer Load Calculation," 0096-020-CALC-01, j Rev. O, dated June 29,1992, which predicts a pressure spike of 275 psig for this scenario.

A copy of this document, or enough detailed information about the analysis methodology and assumptions that were used is requested.

2. Except for a qualitative discussion and comparison of the energy (or impulse) transferred to i the piping structure for the column closure and condensation induced waterhammer, no l I

information about the piping and pipe support analysis for the hydrodynamic loading has been provided. A summary of this analysis is requested.

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ENCLOSURE

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