ML13242A017

Flood Hazard Reevaluation Supplemental Response to March 12, 2012 Information Request Regarding Flooding Aspects of Recommendation 2.1

ML13242A017
Person / Time
Site:	North Anna
Issue date:	08/23/2013
From:	Grecheck E Virginia Electric & Power Co (VEPCO)
To:	Document Control Desk, Office of Nuclear Reactor Regulation
References
13-121A
Download: ML13242A017 (7)

Text

VIRGINIA ELECTRIC AND POWER COMPANY RICHMOND, VIRGINIA 23261 August 23, 2013 U.S. Nuclear Regulatory Commission Serial No. 13-121A Attention: Document Control Desk NL&OS/WDC RO Washington, DC 20555 Docket Nos. 50-338/339 License Nos. NPF-4/7 VIRGINIA ELECTRIC AND POWER COMPANY NORTH ANNA POWER STATION UNITS 1 AND 2 FLOOD HAZARD REEVALUTION SUPPLEMENTAL RESPONSE TO MARCH 12, 2012 INFORMATION REQUEST REGARDING FLOODING ASPECTS OF RECOMMENDATION 2.1

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. NRC letter to Licensees, "Prioritization of Response Due Dates for Request of 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 May 11, 2012.

3. Letter from Eugene S. Grecheck (Dominion) to NRC Document Control Desk, "North Anna Power Station Units 1 and 2 Flood Hazard Reevaluation Report in Response to March 12, 2012 Information Request Regarding Flooding Aspects of Recommendation 2.1," dated March 11, 2013.

On March 12, 2012, the Nuclear Regulatory Commission (NRC) issued Reference I 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. On May 11, 2012, the NRC issued Reference 2. Consistent with Reference 2, in a letter dated March 11, 2013, Virginia Electric and Power Company (Dominion) completed the flood reevaluation at North Anna Power Station and submitted the results to the NRC (Reference 3). Reference 3 contained interim actions to address higher flooding hazards relative to the design basis until the integrated assessment is completed.

The attached table provides a list of the action items contained in Reference 3 with the current status.

Serial No. 13-121A Docket Nos. 50-338/339 Page 2 of 3 If you have any questions regarding this information, please contact Mr. Thomas Shaub at (804) 273-2763.

Sincerely, Eugene S. Grecheck Vice President - Nuclear Engineering and Development Virginia Electric and Power Company COMMONWEALTH OF VIRGINIA COUNTY OF HENRICO The foregoing document was acknowledged before me, in and for the County and Commonwealth aforesaid, today by Eugene S. Grecheck, who is Vice President - Nuclear Engineering and Development of Virginia Electric and Power Company. He has affirmed before me that he is duly authorized to execute and file the foregoing document in behalf of that company, and that the statements in the document are true to the best of his knowledge and belief.

Acknowledged before me this _._____day of AW6+. 2013.

My Commission Expires: bx,,er 31. 201,& CRAIG D SLY Notary Public I Commonwealth of Virgi

']aryPublic Reg. # 7518653 1 My Commission Expires December 31, 2oL&

.l=y ............. l Commitments made in this letter: No new regulatory commitments

Attachment:

1. Flooding Hazard Reevaluation Report Action Items List

Serial No. 13-121A Docket Nos. 50-338/339 Page 3 of 3 cc: U.S. Nuclear Regulatory Commission, Region II Regional Administrator Marquis One Tower 245 Peachtree Center Ave. NE Suite 1200 Atlanta, Georgia 30303-1257 Dr. V. Sreenivas Project Manager U.S. Nuclear Regulatory Commission One White Flint North, Mail Stop 08 G-9A 11555 Rockville Pike Rockville, MD 20852-2738 K. R. Cotton Gross Project Manager U.S. Nuclear Regulatory Commission One White Flint North, Mail Stop 08 G-9A 11555 Rockville Pike Rockville, MD 20852-2738 NRC Senior Resident Inspector North Anna Power Station J. E. Reasor, Jr.

Old Dominion Electric Cooperative Innsbrook Corporate Center, Suite 300 4201 Dominion Blvd.

Glen Allen, Virginia 23060

Serial No. 13-121A Docket Nos. 50-338/339 ATTACHMENT I FLOODING HAZARD REEVALUATION REPORT ACTION ITEMS LIST VIRGINIA ELECTRIC AND POWER COMPANY NORTH ANNA POWER STATION UNITS 1 AND 2

Serial No. 13-121A Docket Nos. 50-338/339 Attachment 1, Page 1 of 3.

item' R~epo rt Itmbem, Refec ,;

Vml~enai~ .... :ActionItem ist Implementation 1 Reference 3, Perform a visual inspection of the yard drain systems within the North Complete Attachment 2, Anna protected area and a visual inspection of the Turbine Building and May, 22, 2013 Section III, 3rd Service Building roof drain systems and a visual inspection of the paragraph Turbine Building and Service Building roof areas for potential loose materials that could potentially block drains.

Status: Inspection was performed. A new periodic test procedure was implemented for annual inspection of the yard drain systems within the North Anna protected area and a visual inspection of the Turbine Building and Service Building roof drain systems and a visual inspection of the Turbine Building and Service Building roof areas for potential loose materials that could potentially block drains. This action item is complete.

2 Reference 3, Evaluate the need for additional periodic visual inspections and/or Complete Attachment 2, preventative maintenance (PMs) of the yard drain systems within the Section 11,4 th North Anna protected area and the Turbine Building and Service paragraph Building roof drain systems.

Status: Evaluation was completed. As a result, a new periodic test procedure was implemented for annual inspection of the yard drain systems within the North Anna protected area and a visual inspection of the Turbine Building and Service Building roof drain systems. This action item is complete.

Serial No. 13-121A Docket Nos. 50-338/339 Attachment 1, Page 2 of 3" Item Number Report.Atin.t%.is Reference Implem~entation Acio Ie is Date 3 Reference 3, Evaluate the need for and/or potential designs for temporary or Complete Attachment 2, permanent barriers to prevent postulated flood water infiltration into the Section III, 6 th Fuel Oil Pump Houses. August 20, 2013 paragraph Status: Evaluation was completed. As a result, modifications were made to allow installation of flood protection barriers at the three Fuel Oil Pump House doors as mitigation for severe weather conditions.

This action item is complete.

4 Reference 3, Evaluate the need for dikes or barriers at other doors and/or louvers Integrated Attachment 2, within the protected area during the Flooding Integrated Assessment. Assessment Section III, 7 th Report due by paragraph March 11, 2015 5 Reference 3, Perform a visual inspection of the West Basin sump drain prior to June Complete Attachment 2, 1,2013.

Section rth 11, 8 Status: Inspection was performed. A new periodic test procedure was paragraph implemented for annual visual inspection of the West Basin sump drain.

This action item is complete.

6 Reference 3, Issue a preventative maintenance procedure to require annual visual Complete Attachment 2, inspections of the West Basin sump drain prior to June 1, of each year. May 2, 2013 Section 111, 8th Status: A new periodic test procedure was implemented for annual paragraph visual inspection of the West Basin sump drain. This action item is complete.

2

Serial No. 13-121A Docket Nos. 50-338/339 Attachment 1, Page 3 of 3'.

Item Report tsImplementation. .

ActioItemList NNumber.,. Referience . Date&, >

7 Reference 3, Revise North Anna abnormal procedures for hurricane preparation to Complete Attachment 2, include inspection of roof and roof drains, as well as storm drain inlets,Section III, 9 th upon notification of a major tropical storm/hurricane approaching central May 17, 2013 paragraph Virginia region.

Status: Abnormal Procedure for severe weather conditions was revised to address inspection of roof and roof drains, as well as storm drain inlets. This action item is complete.

8 Reference 3, An Integrated Assessment of the Flood Hazards for North Anna Units 1 Integrated Attachment 2, and 2 will be performed and an Integrated Assessment Report will be Assessment Section III, 1 0 th provided to the NRC prior to March 12, 2015. Report due by paragraph March 11, 2015 3