RS-13-211, Supplemental Response to NRC Request for Information Pursuant to 10 CFR 50.54(f) Regarding the Flooding Aspects of Recommendation 2.1 of the Near-Term Task Force Review of Insights from the Fukushima Dai-ichi Accident

Supplemental Response to NRC Request for Information Pursuant to 10 CFR 50.54(f) Regarding the Flooding Aspects of Recommendation 2.1 of the Near-Term Task Force Review of Insights from the Fukushima Dai-ichi Accident

ML13241A284
Person / Time
Site:	Quad Cities
Issue date:	08/28/2013
From:	Kaegi G Exelon Generation Co
To:	Office of Nuclear Reactor Regulation, Document Control Desk
References
RS-13-211
Download: ML13241A284 (7)

Text

1 Exelon Generation ~

RS-13-211 10 CFR 50.54(f)

August 28, 2013 u.s. Nuclear Regulatory Commission Attn: Document Control Desk 11555 Rockville Pike, Rockville. MD 20852 Quad Cities Nuclear Power Station, Units 1 and 2 Renewed Facility Operating License Nos. DPR-29 and DPR-30 NRC Docket Nos. 50-254 and 50-265

Subject:

Supplemental Response to NRC Request for Information Pursuant to 10 CFR 50.54(f)

Regarding the Flooding Aspects of Recommendation 2.1 of the Near-Term Task Force Review of Insights from the Fukushima Dai-ichi Accident

References:

1. NRC Letter, Request for Information Pursuant to Title 10 of the Code of Federal Regulations 50.54(f) Regarding Recommendations 2.1,2.3, and 9.3, of the Near-Term Task Force Review of Insights from the Fukushima Dai-ichi Accident, dated March 12, 2012

2. Exelon Generation Company, LLC letter to US NRC, Response to March 12,2012, Request for Information Enclosure 2, Recommendation 2.1, Flooding, Required Response 2, Flooding Hazard Reevaluation Report, dated March 12, 2013 (RS-13-047)

On March 12, 2012, the NRC issued Reference 1 to all power reactor licensees and holders of construction permits in active or deferred status. Enclosure 2 of Reference 1 requested that each licensee perform a reevaluation of external flooding sources and report the results in accordance with the NRC's prioritization plan. Exelon Generation Company, LLC (EGC) submitted the flood reevaluation for Quad Cities Nuclear Power Station, Units 1 and 2 in Reference 2. Reference 2 contains interim actions that EGC has taken or plans to take to address higher flooding hazards relative to the design basis until the integrated assessment is completed.

The enclosed table provides a list of the interim actions taken or planned to be taken as contained in Reference 2 along with additional information and the dates by which they have or will be implemented .

These interim actions have been converted into commitments as requested by the NRC and are identified in the enclosed table. Also as requested by the NRC, EGC will not modify these commitments or completion dates without notifying the NRC in advance.

This letter contains new regulatory commitments as identified in the enclosed table.

Should you have any questions concerning the content of this letter, please contact Ron Gaston at (630) 657-3359.

U.S. Nuclear Regulatory Commission August 28, 2013 Page 2 I declare under penalty of perjury that the foregoing is true and correct. Executed on the 28th day of August 2013.

Respectfully submitted,

~ r~

Glen T. Kaegi Director - Licensing & Regulatory Affairs Exelon Generation Company, LLC

Enclosure:

1. Quad Cities Nuclear Power Station, Units 1 and 2 - Flood Hazard Reevaluation Report Interim Action Commitments cc: Director, Office of Nuclear Reactor Regulation Regional Administrator - NRC Region III NRC Senior Resident Inspector - Quad Cities Nuclear Power Station NRC Project Manager, NRR - Quad Cities Nuclear Power Station Ms. Jessica A. Kratchman, NRR/JLD/PMB, NRC Mr. Eric E. Bowman, NRR/DPRlPGCB, NRC or Ms. Eileen M. McKenna, NRO/DSRAlBPTS, NRC Illinois Emergency Management Agency - Division of Nuclear Safety

Enclosure 1: Quad Cities Nuclear Power Station, Units 1 and 2 - Flood Hazard Reevaluation Report Interim Action Commitments* ("Commitments" are bolded header columns)

Item Implementation Commitment Commitment Interim Actions Taken or Number Date Type Type Planned to Take as Report Included in the Additional Information (Committed* One-Time Programmatic*

Reference Reevaluation Report Date or Action*

(Commitment*) Outage) (YeslNo) (Yes/No)

The local intense precipitation interim evaluation will include:

1. A visual inspection of plant Report Some of the plant grade Completed Yes No grade level doors to Cover level doors do not have March 18,2013 confirm proper operation Letter, seals, as seals are not and assess seal condition.

Section required by the current d.ii design basis requirements. The results of this action are being evaluated under Interim Action Item Number 3.

2. A visual inspection of plant Report The overall drainage Completed Yes No drainage system Cover system condition was March 14,2013 components to confirm Letter, found acceptable.

functionality.

Section d.ii Page 1 of 5

Enclosure 1: Quad Cities Nuclear Power Station, Units 1 and 2 - Flood Hazard Reevaluation Report Interim Action Commitments* ("Commitments" are bolded header columns)

Item Commitment Commitment Interim Actions Taken or Implementation Number Date Type Type Planned to Take as Report Included in the Additional Information (Committed* One-Time Programmatic*

Reference Reevaluation Report Date or Action*

(Commitment*) Outage) (Yes/No) (Yes/No)

3. An evaluation of the Report April 4, 2014 Yes No effects of local intense Cover precipitation event on the Letter, plant, with respect to:

Section d.ii

- Building structures and doors and amount of leakage the doors would allow;

- How the leakage through the doors affect plant equipment;

- Recommended actions based on the results of the evaluations; and

- Prioritizing actions for high risk areas.

Page 2 of 5

Enclosure 1: Quad Cities Nuclear Power Station, Units 1 and 2 - Flood Hazard Reevaluation Report Interim Action Commitments* ("Commitments" are bolded header columns)

Item Interim Actions Taken or Implementation Commitment Commitment Number Planned to Take as Date Type Type Report Included in the Additional Information (Committed* One-Time Programmatic*

Reference Reevaluation Report Date or Action*

(Commitment*) Outage) (Yes/No) (Yes/No)

4. Develop and implement Report Procedure QCOA 0010- Completed Yes No appropriate operational Cover 22 (Local Intense March 14,2013 response procedures to Letter, Precipitation Procedure) mitigate the effects of the Section was developed.

LIP Event.

d.ii

5. Perform additional local Report Calculations LlP-QDC- Completed Yes No intense precipitation Cover 002 and LlP-ODC-003 June 27,2013 calculations to further Letter, were developed in explore site drainage Section accordance with Appendix affects.

d.ii B of NUREG/CR-7046, Case 1 and Case 2, respectively.

6. Obtaining a site survey so Report The results of this action Completed Yes No that the results of the local Cover are being evaluated under August 8,2013 intense precipitation Letter, Interim Action Item analysis can be directly Section Number 3.

correlated to the door sill d.ii elevations.

Page 3 of 5

Enclosure 1: Quad Cities Nuclear Power Station, Units 1 and 2 - Flood Hazard Reevaluation Report Interim Action Commitments* ("Commitments" are bolded header columns)

Item Implementation Commitment Commitment Interim Actions Taken or Number Date Type Type Planned to Take as Report Included in the Additional Information (Committed* One-Time Programmatic*

Reference Reevaluation Report Date or Action*

(Commitment*) Outage) (Yes/No) (Yes/No)

7. Determine if interim flood Report May 30, 2014 Yes No barriers are warranted until Cover the 2-Year Integrated Letter, Assessment Report is Section complete.

d.ii The river flood and combined-effects flood interim evaluation will include:

8. Evaluate the effects of Report November 15, Yes No wind-generated waves on Cover 2013 the plant. Letter, Section d.ii

9. Evaluate the effects of Report November 15, Yes No hydrodynamic and debris Cover 2013 impact loading on the plant. Letter, Section d.ii Page 4 of 5

Enclosure 1: Quad Cities Nuclear Power Station, Units 1 and 2 - Flood Hazard Reevaluation Report Interim Action Commitments* ("Commitments" are bolded header columns)

Item Interim Actions Taken or Implementation Commitment Commitment Number Planned to Take as Date Type Type Report Included in the Additional Information (Committed* One-Time Programmatic*

Reference Reevaluation Report Date or Action*

(Commitment*) Outage) (Yes/No) (Yes/No)

10. Revise Flooding Report Revisions to QCOA 0010- July 18, 2014 Yes No Procedures to incorporate Cover 16 (Flood Emergency new issues (as appropriate) Letter, Procedure) have been in accordance with updated Section made to address river flood calculations.

d.ii evaluations completed to date. Additional revisions may be made as appropriate based on the results of completed Interim Actions.

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