ML14317A783
| ML14317A783 | |
| Person / Time | |
|---|---|
| Site: | Byron, Braidwood  |
| Issue date: | 11/19/2014 |
| From: | Robinson L License Renewal Projects Branch 1 |
| To: | |
| Robinson L, NRR/DLR/RPB1, 301-415-4115 | |
| References | |
| TAC MF1879, TAC MF1880, TAC MF1881, TAC MF1882 | |
| Download: ML14317A783 (6) | |
Text
UNITED STATES NUCLEAR REGULATORY COMMISSION WASHINGTON, D.C. 20555-0001 November 19, 2014 LICENSEE:
Exelon Generation Company, LLC FACILITY:
Byron Station, Units 1 and 2 Braidwood Station, Units 1 and 2
SUBJECT:
SUMMARY
OF TELEPHONE CONFERENCE CALL HELD ON OCTOBER 27, 2014, BETWEEN THE U.S. NUCLEAR REGULATORY COMMISSION AND EXELON GENERATION COMPANY, LLC CONCERNING DRAFT REQUEST FOR ADDITIONAL INFORMATION, SET 44, PERTAINING TO THE BYRON STATION AND BRAIDWOOD STATION, LICENSE RENEWAL APPLICATION (TAC NOS. MF1879, MF1880, MF1881, MF1882)
The U.S. Nuclear Regulatory Commission (NRC or the staff) and representatives of Exelon Generation Company, LLC (Exelon or the applicant), held a telephone conference call on October 27, 2014, to discuss and clarify the staffs draft request for additional information (DRAI), Set 44, concerning the Byron Station, Units 1 and 2, and the Braidwood Station, Units 1 and 2, license renewal application. The telephone conference call was useful in clarifying the intent of the staffs DRAIs.
provides a listing of the participants, and Enclosure 2 contains the DRAI discussed with the applicant, including a brief description on the status of the items.
The applicant had an opportunity to comment on this summary.
/RA/
Lindsay Robinson, Project Manager Projects Branch 1 Division of License Renewal Office of Nuclear Reactor Regulation Docket Nos. 50-454, 50-455, 50-456, and 50-457
Enclosures:
- 1. List of Participants
- 2. List of Draft Request for Additional Information cc w/encls: Listserv
- Concurred via e-mail OFFICE LA:RPB1:DLR* PM:RPB1:DLR BC:RPB1:DLR PM:RPB1:DLR NAME YEdmonds LRobinson YDiaz-Sanabria LRobinson DATE 11/18/14 11/19/14 11/19/14 11/19/14
SUBJECT:
SUMMARY
OF TELEPHONE CONFERENCE CALL HELD ON OCTOBER 27, 2014, BETWEEN THE U.S. NUCLEAR REGULATORY COMMISSION AND EXELON GENERATION COMPANY, LLC CONCERNING DRAFT REQUEST FOR ADDITIONAL INFORMATION, SET 44, PERTAINING TO THE BYRON STATION AND BRAIDWOOD STATION, LICENSE RENEWAL APPLICATION (TAC NOS. MF1879, MF1880, MF1881, MF1882)
DISTRIBUTION EMAIL:
PUBLIC RidsNrrDlr Resource RidsNrrDlrRpb1 Resource RidsNrrDlrRarb Resource RidsNrrDlrRasb Resource RidsOgcMailCenter RidsNrrPMByron Resource RidsNrrPMBraidwood Resource LRobinson DMcIntyre, OPA EDuncan, RIII JBenjamin, RIII AGarmoe, RIII JMcGhee, RIII JRobbins, RIII VMitlyng, RIII PChandrathil, RIII
ENCLOSURE 1 TELEPHONE CONFERENCE CALL BYRON STATION, UNITS 1 AND 2, AND BRAIDWOOD STATION, UNITS 1 AND 2 LICENSE RENEWAL APPLICATION LIST OF PARTICIPANTS October 27, 2014 PARTICIPANTS AFFILIATIONS Lindsay Robinson U.S. Nuclear Regulatory Commission (NRC)
Alice Erickson NRC George Thomas NRC John Hufnagel Exelon Generating Company, LLC (Exelon)
Al Fulvio Exelon Don Warfel Exelon Jim Annett Exelon Don Brindle Exelon Ralph Wolen Exelon
ENCLOSURE 2 DRAFT REQUEST FOR ADDITIONAL INFORMATION BYRON STATION, UNITS 1 AND 2, AND BRAIDWOOD STATION, UNITS 1 AND 2, LICENSE RENEWAL APPLICATION October 27, 2014 The U.S. Nuclear Regulatory Commission (NRC or the staff) and representatives of Exelon Generation Company, LLC (Exelon or the applicant), held a telephone conference call on October 27, 2014, to discuss and clarify the following draft request for additional information (DRAI), Set 44, concerning the Byron Station, Units 1 and 2, and the Braidwood Station, Units 1 and 2, license renewal application (LRA).
DRAI B.2.1.30-6 Applicability:
Byron Station and Braidwood Station (BBS), all units
Background:
ASME Code Section XI, Subsection IWL, sub-article IWL-2310 requires that general visual examinations of concrete surfaces shall be performed, directly or remotely, in sufficient detail to identify areas of concrete deterioration and distress, such as described in ACI 201.1R and ACI 349.3R. GALL Report Aging Management Program (AMP) XI.S2, ASME Section XI, Subsection IWL, states that [q]uantitative acceptance criteria based on the Evaluation Criteria provided in Chapter 5 of ACI 349.3R also may be used to augment the qualitative assessment of the Responsible Engineer. To demonstrate consistency with the GALL Report, LRA Section B.2.1.30, ASME Section XI, Subsection IWL includes enhancements to the program (Commitment No. 30) to (1) explicitly require that areas of concrete deterioration and distress be recorded in accordance with the guidance provided in ACI 349.3R and (2) include the quantitative acceptance criteria in Chapter 5 of ACI 349.3R and use it to augment the qualitative assessment of the Responsible Engineer consistent with GALL Report AMP XI.S2.
However, during NRC Regional 71002 inspections in support of the review of the BBS LRA, the inspection team noted that visual inspections of areas of concrete deterioration are taken at a distance with the use of a telescope. The inspection team expressed concern regarding the applicants visual resolution capability to be used during the period of extended operation, to quantify degradation based on quantitative acceptance criteria described in Chapter 5 of ACI 349.3R.
Issue:
It is not clear what visual resolution capabilities will be used for concrete surface examination during the period of extended operation to ensure methods and equipment will provide sufficient quantitative measurements to evaluate against the quantitative criteria in ACI 349.3R.
Request:
Provide information to verify that sufficient visual resolution capability will be used during visual examinations of concrete surfaces of containment structures to detect and quantify forms of degradation for comparison against quantitative acceptance criteria based on Chapter 5 of ACI 349.3R.
Discussion: The applicant requested clarification on the staffs request. No edits were made to this request. This DRAI was formally sent as an RAI to the applicant on November 6, 2014, titled: RAI B.2.1.30-6.