ML15093A285

Enclosures 3 and 4: Cover Sheet for CD-R Labeled Re Pertinent Site Data (Not Added) and Summary of Regulatory Commitments

ML15093A285
Person / Time
Site:	Oyster Creek
Issue date:	03/12/2015
From:	Exelon Generation Co
To:	Office of Nuclear Reactor Regulation
Shared Package
ML15093A289	List: ML15093A283 ML15093A284 ML15093A285 RA-15-015, Response to March 12, 2012, Request for Information Enclosure 2, Recommendation 2.1, Flooding, Required Response 2, Flood Hazard Reevaluation Report and Request for Relief from Flooding Integrated Assessment
References
RA-15-015, RS-15-063
Download: ML15093A285 (5)

Text

Enclosure 3 CD-R labeled:

Oyster Creek Nuclear Generating Station Flood Hazard Reevaluation Pertinent Site Data

Enclosure 4

SUMMARY

OF REGULATORY COMMITMENTS The following table identifies commitments made in this document. (Any other actions discussed in the submittal represent intended or planned actions. They are described to the NRC for the NRC's information and are not regulatory commitments.)

Page 1 of 4

Enclosure 4: Oyster Creek Nuclear Generating Station, Unit 1 - Flood Hazard Reevaluation Report Interim Action Commitments* ("Commitments" are bolded header columns)

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

(Commitment*) Date or Outage) Action*

(Yes/No) (Yes/No)

Local Intense Precipitation 1 OP-OC-108-109-1001, Attachments 1,4 and 6, Report Action is N/A No Yes contain procedures for flooding due to "heavy rains, Cover complete snow melt, etc." and the installation of sand bags. Letter, Sand bags are maintained filled in a Seavan Section d located by the Maintenance Shop. Upon notification of flooding potential associated with Severe Weather as defined in Procedure OP-OC-108-109-1001, this procedure directs the sand bags be pre-staged at specific locations listed in the procedure. Sand bags for installation at Door DR-156-204 will be pre-staged in the Drywell Processing Center near the door. There is minimal preparation and installation time required.

Sandbagging Door DR-1 56-204 provides protection for Door DR-814-01 1, RB Northwest Airlock (Door 9 in Enclosure 1), and Door DR-814-044, RB 480 Volt Switchgear Room.

Probable Maximum Storm Surge (Combinations in Section H.3.2 of NUREG/CR-7046 (Reference 3))

2. Revised procedure OP-OC-108-109-1001 to have Report Action is N/A No Yes sand bags pre-staged at the entrances to Site Cover complete Emergency Building and Turbine Building. Letter, Section d

3. Revised procedure OP-OC-108-109-1001 to have Report Action is N/A No Yes additional sand bags pre-staged at the Cover complete Administration Building and Material Warehouse to Letter, protect assets. Section d I Page 2 of 4

Enclosure 4: Oyster Creek Nuclear Generating Station, Unit 1 - Flood Hazard Reevaluation Report Interim Action Commitments* ("Commitments" are bolded header columns)

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

(Commitment*) Date or Outage) Action*

(Yes/No) (Yes/No)

4. An assessment of the impact of hydrodynamic and Report Action is N/A Yes No debris loads was conducted under ECR OC 12- Cover complete 00578, Rev 01, Attachment 1. The assessment Letter, indicated that these loads are bounded by current Section d licensing basis impact loads.

5. A structural analysis was conducted under AR Report Action is N/A Yes No 01539938 to evaluate an additional 1.5 feet of Cover complete hydrostatic load on the Reactor Building, Turbine Letter, Building, Emergency Diesel Generator Building, Section d pipe vault, pipe trench between the Turbine Building and Condensate Storage Tank, vault between the Turbine Building and Reactor Building, and Reactor Building south wall vaults. The results indicate that these structures have sufficient capacity to accommodate the additional hydrostatic load. II Local Intense Precipitation and Probable Maximum Storm Surge (Combinations in Section H.3.2 of NUREG/CR-7046 (Reference 3))

6. The Material Warehouse stores a B.5.B pump for Report Action is N/A Yes No defense-in-depth. It is not needed for FLEX or flood Cover complete mitigation. Letter, Section d

7. Conduct a site walkdown and review of plant Report Planned August 31, 2015 Yes No records to identify other potential entry points for Cover action ingress of external floodwater into protected areas Letter, of the plant based on the reevaluated flood levels. Section d Identify additional actions needed to prevent ingress of external floodwater in areas where ingress could compromise safety functions. Confirm sufficient supply and configuration of sand bags at reevaluated flood levels.

Page 3 of 4

Enclosure 4: Oyster Creek Nuclear Generating Station, Unit 1 - Flood Hazard Reevaluation Report Interim Action Commitments* ("Commitments" are bolded header columns)

Item Commitment Commitment Number Interim Actions Taken or Planned to Take as Implementation Type Type A dInt Numbr ions taken oReelation TepReport Additional Date Included in the Reevaluation Report Reference Information (Committed* One-Time Programmatic*

(Commitment*) Date or Outage) Action*

(Yes/No) (Yes/No)

8. Ensure the FLEX strategy can be implemented with Report Planned August 31, 2015 Yes No the reevaluated flood. Cover action Letter, Section d Page 4 of 4