Letter Sequence RAI |
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MONTHYEARNLS2012001, 10 CFR 50.55a Request Number RI-07, Revision 02012-01-16016 January 2012
10 CFR 50.55a Request Number RI-07, Revision 0
Project stage: Request
ML12031A2482012-01-16016 January 2012
Completion of License Renewal Commitment NLS2009100-1 (Revision 1)
Project stage: Other
ML1204506862012-02-14014 February 2012
Acceptance Review Email, Relief Request RI-07 from ASME Code Requirements for Residual Heat Removal Shell Circumferential and Nozzle to Head Welds, Fourth 4th 10-Year Inservice Inspection Interval
Project stage: Acceptance Review
ML1213205752012-05-11011 May 2012
Request for Additional Information, Relief Request RI-07 from ASME Code Requirements for Residual Heat Removal Shell Circumferential and Nozzle to Head Welds, Fourth 4th 10-Year Inservice Inspection Interval
Project stage: RAI
ML1213205722012-05-11011 May 2012
Email, Request for Additional Information, Relief Request RI-07 from ASME Code Requirements for Residual Heat Removal Shell Circumferential and Nozzle to Head Welds, Fourth 4th 10-Year Inservice Inspection Interval
Project stage: RAI
ML12159A2992012-06-11011 June 2012
Request for Additional Information, Relief Request RI-07 from ASME Code Requirements for Residual Heat Removal Shell Circumferential and Nozzle to Head Welds, Fourth 4th 10-Year Inservice Inspection Interval
Project stage: RAI
NLS2012064, Response to Nuclear Regulatory Commission Request for Additional Information Request for Relief for the Fourth 10-Year Inservice Inspection Program2012-06-22022 June 2012
Response to Nuclear Regulatory Commission Request for Additional Information Request for Relief for the Fourth 10-Year Inservice Inspection Program
Project stage: Request
ML12313A1112013-01-22022 January 2013
Relief Request RI-07 from ASME Code Requirements for Residual Heat Removal Shell Circumferential and Nozzle to Head Welds, Fourth 4th 10-Year Inservice Inspection Interval
Project stage: Approval
2012-05-11
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REQUEST FOR ADDITIONAL INFORMATION REGARDING COOPER NUCLEAR STATION WELD EXAMINATION RELIEF REQUEST RI-07 (TAC NO. ME7875)
By letter dated January 16, 2012, Nebraska Public Power District (NPPD), the licensee for Cooper Nuclear Station (Cooper) submitted for staff review and approval weld examination relief requests for the Cooper Fourth 10-Year Inservice (ISI) Inspection Interval.
The NRC staff has reviewed the information provided and has determined that additional information is needed in order to complete its review.
- 1. Please describe the materials of construction of RHR-CA-2A and RHR-CB-1A including the base and weld materials.
- 2. Please briefly clarify the difference in technique between the examinations conducted during the previous ISI interval and those conducted during the current interval. In addition, please explain why the coverage percentages differed so much between intervals.
- 3. Please state if alternative beam-angle examinations were attempted. If so, please describe the impact of these alternatives (if any) on coverage.
- 4. Please provide a diagram of the RHR vessel on which the examinations were performed indicating on the diagram where the welds of interest are located.
