ML082460493
| ML082460493 | |
| Person / Time | |
|---|---|
| Site: | Peach Bottom  |
| Issue date: | 10/02/2008 |
| From: | John Hughey Plant Licensing Branch 1 |
| To: | Pardee C Exelon Generation Co, Exelon Nuclear |
| Hughey J, NRR/DORL, 301-415-3204 | |
| References | |
| TAC MD8308, TAC MD8309 | |
| Download: ML082460493 (3) | |
Text
UNITED STATES NUCLEAR REGULATORY COMMISSION WASHINGTON, D.C. 20555-0001 October 2, 2008 Mr. Charles G. Pardee President and Chief Nuclear Officer Exelon Nuclear 4300 Winfield Road Warrenville, IL 60555
SUBJECT:
PEACH BOTTOM ATOMIC POWER STATION, UNITS 2 AND 3: REQUEST FOR ADDITIONAL INFORMATION REGARDING RELIEF REQUEST CRR-13 ASSOCIATED WITH THE FIRST AND SECOND CONTAINMENT INSERVICE INSPECTION INTERVALS (TAC NOS. MD8308 AND MD8309)
Dear Mr. Pardee:
By letter dated February 29, 2008, (Agencywide Documents Access and Management System (ADAMS) Accession No. ML080640587), as supplemented by letter dated August 4,2008, (ADAMS Accession No. ML082200279), Exelon Generation Company, LLC, submitted Relief Request CRR-13 associated with the first and second Containment Inservice Inspection intervals for Peach Bottom Atomic Power Station, Units 2 and 3. The NRC staff has reviewed the request submitted by the licensee and has identified a need for additional information as set forth in the Enclosure.
The draft questions were sent to Tom Loomis, from your staff, to ensure that the questions were understandable, the regulatory basis for the questions was clear, and to determine if the information was previously docketed. On September 9,2008, Mr. Loomis indicated that Exelon will submit a response by October 10, 2008. If you have any questions, please contact John Hughey at (301) 415-3204.
S7£iJ~
John D. Hughey, Project Manager Plant Licensing Branch 1-2 Division of Operating Reactor Licensing Office of Nuclear Reactor Regulation Docket Nos. 50-277 and 50-278
Enclosure:
Request for Additional Information cc: Distribution via Listserv
REQUEST FOR ADDITIONAL INFORMATION REGARDING RELIEF REQUEST CRR-13 ASSOCIATED WITH THE FIRST AND SECOND CONTAINMENT INSERVICE INSPECTION INTERVALS PEACH BOTTOM ATOMIC POWER STATION, UNITS 2 AND 3 DOCKET NOS. 50-277 AND 50-278 By letter dated February 29, 2008, (Agencywide Documents Access and Management System (ADAMS) Accession No. ML080640587), as supplemented by letter dated August 4, 2008, (ADAMS Accession No. ML082200279), Exelon Generation Company, LLC, submitted Relief Request CRR-13 associated with the first and second Containment Inservice Inspection intervals for Peach Bottom Atomic Power Station (PBAPS), Units 2 and 3. The Nuclear Regulatory Commission (NRC) staff has identified an apparent discrepancy between the detail drawings provided with the relief request dated February 29, 2008, and the Request for Additional Information (RAI) response dated August 4, 2008. Specifically, the note next to the seal weld on Figure CRR-13-2 (Detail E dwg S-53) in relief request CRR-13 states:
SEAL WELD AFTER CONCRETE HAS BEEN POURED OUTSIDE THE DRYWELL (WELDS BY OTHERS)
However, in the RAI response, Note 1 with regard to "Sequence of Concrete Pours Under Drywell Shell" shown in Section A on Drawing S-188 states:
AFTER COMPLETION OF PNEUMATIC TESTS ON THE DRYWELL, SEAL WELD THE MANHOLE IN THE BOTTOM OF THE DRYWELL, INSTALL REBARS AND PLACE CONCRETE POUR #1 INSIDE THE DRYWELL UP TO EL 116'-0".
Per a similar Note 2 on drawing S-188, Concrete Pour # 2 under (Outside) the drywell is made after Pour #1.
Thus, drawing S-53 indicates that the seal weld was performed after concrete was poured outside the drywell and drawing S-188 indicates that the seal weld was performed before concrete was poured. (Note that dwg. S-53 is also referenced in Section 1 of relief request CRR-13, but drawing S-188 is not).
In order for the NRC staff to complete its evaluation, response to the following RAI question is requested.
RAI-1) Please explain the discrepancy described above with regard to the seal weld information contained in Figure CRR-13-2 (Detail E drawing S-53) in relief request CRR-13 and that on PBAPS drawing S-188.
Enclosure
October 2, 2008 Mr. Charles G. Pardee President and Chief Nuclear Officer Exelon Nuclear 4300 Winfield Road Warrenville, IL 60555
SUBJECT:
PEACH BOTTOM ATOMIC POWER STATION, UNITS 2 AND 3: REQUEST FOR ADDITIONAL INFORMATION REGARDING RELIEF REQUEST CRR-13 ASSOCIATED WITH THE FIRST AND SECOND CONTAINMENT INSERVICE INSPECTION INTERVALS (TAC NOS. 1\\1108308 AND MD8309)
Dear Mr. Pardee:
By letter dated February 29,2008, (Agencywide Documents Access and Management System (ADAMS) Accession No. ML080640587), as supplemented by letter dated August 4,2008, (ADAMS Accession No. ML082200279), Exelon Generation Company, LLC, submitted Relief Request CRR-13 associated with the first and second Containment Inservice Inspection intervals for Peach Bottom Atomic Power Station, Units 2 and 3. The NRC staff has reviewed the request submitted by the licensee and has identified a need for additional information as set forth in the Enclosure.
The draft questions were sent to Tom Loomis, from your staff, to ensure that the questions were understandable, the regulatory basis for the questions was clear, and to determine if the information was previously docketed. On September 9,2008, Mr. Loomis indicated that Exelon will submit a response by October 10, 2008. If you have any questions, please contact John Hughey at (301) 415-3204.
Sincerely, Ira/
John D. Hughey, Project Manager Plant Licensing Branch 1-2 Division of Operating Reactor Licensing Office of Nuclear Reactor Regulation Docket Nos. 50-277 and 50-278
Enclosure:
Request for Additional Information cc: Distribution via Listserv DISTRIBUTION:
PUBLIC LPLI-2 RtF RidsNrrPMJHugheyResource RidsN rrLAABaxterResource RidsRgn1MailCenterResource RidsNrrDorlLpl1-2Resource RidsNrrDeEmcbResource GThomas,NRR HAshar,NRR RidsOgcRpResource RidsAcrsAcnw_MailCTRResource Nurnb ML082460493
- b)y memo dtdAUQust 27,2008 ADAMS Accession er:
a e OFFICE LPL1-2/PM LPL1-2/LA EMCB/BC LPL1-2/BC NAME JHughey ABaxter KManoly*
HChernoff (REnnis for)
DATE 10/2/2008 09/29/2008 812712008 10/2/2008 I
OFFICIAL RECORD COpy