ML17292B708
| ML17292B708 | |
| Person / Time | |
|---|---|
| Site: | Columbia  |
| Issue date: | 06/23/1999 |
| From: | Jack Cushing NRC (Affiliation Not Assigned) |
| To: | Parrish J WASHINGTON PUBLIC POWER SUPPLY SYSTEM |
| References | |
| TAC-MA4602, NUDOCS 9906280285 | |
| Download: ML17292B708 (8) | |
Text
dune 23, 1999 Mr. J. V. Parrish Chief Executive Officer Washington Public Power Supply System P.O. Box 968 (Mail Drop 1023)
Richland, WA 99352-0968
SUBJECT:
REQUEST FOR ADDITIONALINFORMATION(RAI) FOR THE WASHINGTON PUBLIC POWER SUPPLY SYSTEM NUCLEAR PROJECT NO. 2 (TAC NO. MA4602)
Dear Mr. Parrish:
The NRC staff has reviewed your submittals regarding the planar indication found on weld number 24RRC(2)A-1 dated March 24, 1999, as supplemented by letter dated April29, 1999.
As a result of the review, the staff has determined that additional information is needed to complete the review. The information needed is detailed in the enclosure.
The enclosed request was discussed with Mr. Arbuckle of your staff on June 14, 1999.
A mutually agreeable target date of July 2, 1999, was established for responding to the RAI.
If circumstances result in the need to revise the target date, please call me at your earliest opportunity at (301) 415-1424.
Sincerely, Docket No. 50-397 Jack Gushing, Project Manager, Section 2 Project Directorate IV 8 Decommissioning Division of Licensing Project Management Office of Nuclear Reactor Regulation
Enclosure:
Request for Additional Information ccw/encl: See nextpage DISTRIBUTION gDocOoet-Filets PUBLIC PDIV-2 Reading SRichards I
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UNITED STATES NUCLEAR REGULATORY COMMISSION WASHINGTON, D.C. 20555-0001 3une 23, 1999 Mr. J. V. Parrish Chief Executive Officer Washington Public Power Supply System P.O. Box 968 (Mail Drop 1023)
Richland, WA 99352-0968
SUBJECT:
REQUEST FOR ADDITIONALINFORMATION(RAI) FOR THE WASHINGTON PUBLIC POWER SUPPLY SYSTEM NUCLEAR PROJECT NO. 2 (TAC NO. MA4602)
Dear Mr. Parrish:
The NRC staff has reviewed your submittals regarding the planar indication found on weld number 24RRC(2)A-1 dated March 24, 1999, as supplemented by letter dated April29, 1999.
As a result of the review, the staff has determined that additional information is needed to complete the review. The information needed is detailed in the enclosure.
The enclosed request was discussed with Mr. Arbuckle of your staff on June 14, 1999.
A mutually agreeable target date of July 2, 1999, was established for responding to the RAI.
Ifcircumstances result in the need to revise the target date, please call me at your earliest opportunity at (301) 415-1424.
Sincerely, ack Gushing, Project Manager, Section 2 Project Directorate IV 8 Decommissioning Division of Licensing Project Management Office of Nuclear Reactor Regulation Docket No. 50-397
Enclosure:
Request for Additional Information ccw/encl: See next page
<I
Nuclear Project No. 2 CC:
Mr. Greg O. Smith (Mail Drop 927M)
Vice President, Generation Washington Public Power Supply System P. O. Box 968 Richland, Washington 99352-0968 Mr. Albert E. Mouncer (Mail Drop 1396)
Chief Counsel Washington Public Power Supply System P.O. Box 968 Richland, Washington 99352-0968 Ms. Deborah J. Ross, Chairman Energy Facility Site Evaluation Council P. O. Box 43172 Olympia, Washington 98504-3172 Mr. D. W. Coleman (Mail Drop PE20)
Regulatory Affairs Manager Washington Public Power Supply System P.O. Box 968 Richland, Washington 99352-0968 Mr. Paul lnserra (Mail Drop PE20)
Manager, Licensing Washington Public Power Supply System P.O. Box 968 Richland, Washington 99352 Regional Administrator, Region IV U.S. Nuclear Regulatory Commission Harris Tower 8 Pavilion 611 Ryan Plaza Drive, Suite 400 Arlington, Texas 76011-8064 Chairman Benton County Board of Commissioners P.O. Box 69 Prosser, Washington 99350-0190 Senior Resident Inspector U.S. Nuclear Regulatory Commission P.O. Box 69 Richland, Washington 99352-0968 I
Mr. Rodney L. Webring (Mail Drop PE08)
Vice President, Operations Support/PIO Washington Public Power Supply System P. O. Box 968 Richland, Washington 99352 Perry D. Robinson, Esq.
Winston 8 Strawn 1400 L Street, N.W.
Washington, DC 20005-3502 Mr. Bob Nichols Executive Policy Division Office of the Governor P.O. Box 43113 Olympia, Washington 98504-3113
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RE VEST FOR ADDITIONALINFORMATION WASHINGTON PUBLIC POWER SUPPLY SYSTEM NUCLEAR PROJECT NO. 2 NP-2 DOCKET NO. 50-397 (1)
In CMR-,98-0243, Page 1.4003, second paragraph you state, 'The input file for N1FAT1.IN contains the flaw length of 18.7" and a depth of.935". This flaw depth and length was then ran for one year of fatigue cycles due to discontinuity, OBE and SSE in accordance with ASME Code 1989 Section XI Rules. The final length was determined to be 18.712" and 1.05" deep."
This correlates to a crack depth growth rate due to fatigue of.115" per year (1.05 -.935 =.1'I5).
The table on page 2 of the April29, 1999, submittal, lists the fatigue crack depth change from June 1998 until April2001. The greatest change in crack depth is.0051 for the period from November 1999 until April2001 and equals a crack growth rate due to fatigue of only.034" per year.
Please explain the difference in the fatigue crack growth rates.
(2)
Using the,year-by-year growths providedin the above-mentioned table and the fatigue growth of.115 inch for one year beyond the 970 days, provide your estimate of the total crack depth growth due to fatigue for the entire period of 970 days.
ENCLOSURE
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