ML041840198
| ML041840198 | |
| Person / Time | |
|---|---|
| Site: | McGuire, Mcguire  |
| Issue date: | 07/02/2004 |
| From: | James Shea NRC/NRR/DLPM/LPD2 |
| To: | Gordon Peterson Duke Energy Corp |
| SHea J, 415-1388, NRR/DLPM | |
| References | |
| TAC MB9523, TAC MB9524 | |
| Download: ML041840198 (5) | |
Text
July 2, 2004 Mr. G. Peterson Vice President McGuire Nuclear Station Duke Energy Corporation 12700 Hagers Ferry Road Huntersville, NC 28078-8985
SUBJECT:
MCGUIRE NUCLEAR STATION, UNITS 1 AND 2 - REQUEST FOR ADDITIONAL INFORMATION RE: CONTAINMENT DIVIDER BARRIER INTEGRITY (TAC NOS. MB9523 AND MB9524)
Dear Mr. Peterson:
By letter to the U.S. Nuclear Regulatory Commission (NRC) dated June 3, 2003, you submitted an application for an amendment to the operating license for McGuire Nuclear Station, Units 1 and 2. The amendment would modify Technical Specification (TS) 3.6.14 to allow a pressurizer hatch to be open for up to six hours to facilitate future inspections and maintenance. The current TS limits the pressurizer hatch open time to one hour. The NRC staff has reviewed your submittal and has determined that additional information is required. Our questions are provided in the Enclosure. We discussed these questions with your staff on June 16, 2004.
Your staff indicated that a response could be provided within 30 days of the date of this letter.
If you have any further questions on this matter, please call me at (301) 415-1388.
Sincerely,
/RA/
James J. Shea, Project Manager, Section 1 Project Directorate II Division of Licensing Project Management Office of Nuclear Reactor Regulation Docket No. 50-369 and 50-370
Enclosure:
Request for Additional Information cc w/encl: See next page
- Previous concurrence via e-mail NRR-088 OFFICE PDII-1/PM DSSA/SPSB DSSA/SPLB-A PDII1/SC (A)
NAME JShea RDennig*
JYerokun*
SCoffin DATE 6/30/04 6/21/04 6/18/04 6/30/04
Enclosure REQUEST FOR ADDITIONAL INFORMATION ON CONTAINMENT DIVIDER BARRIER INTEGRITY AMENDMENT REQUEST MCGUIRE NUCLEAR STATION, UNITS 1 AND 2
- 1. to the submittal, dated June 3, 2003, states the following:
A McGuire engineering calculation was performed to ensure that the drop of the largest pressurizer hatch plug on the pressurizer enclosure roof or operating floor, and a drop of the polar crane load block onto the operating floor would not damage any equipment, components, or systems necessary for safe shutdown.... Based on this calculation, the operating floor and the pressurizer enclosure roof can withstand a drop of the largest pressurizer enclosure hatch plug or the polar crane load block.
Subsequently the heavy load drop analysis was revised to ensure the calculation enveloped the case of the largest pressurizer hatch plug dropping back into the hole.
a.
Describe the assumptions and methodology used in the above revised calculation for the NRC staffs review.
b.
Explain how the load drop analysis conforms to the NUREG-0612, Appendix A guidelines for analysis of postulated load drops. Specifically, address NUREG-0612, Appendix A, Section 1, Items 1, 3, 6, and 7.
c.
NUREG-0612, Appendix A, Section 2, Item 1 recommends that the impact loads should include the load, the crane load block, and other lifting apparatus.
However, your analysis involves dropping of the largest pressurizer hatch plug and the polar crane load block separately on structures. Explain how you determine consequences of a postulated load drop involving a drop of the load, the crane load block, and other lifting apparatus together on structures.
2.
Explain how you satisfy the following of NUREG-0612: (1) general guidelines in Section 5.1.1 and (2) guidelines on minimizing the possibility of failing safe shutdown equipment as a result of a load drop in Section 5.1.5.
3.
You have stated it may be necessary to enter the pressurizer cavity to perform inspections and maintenance requiring the hatch to be opened longer than one hour during plant operation. Provide details on situations that would require the hatch to be opened for up to six hours as proposed in this amendment.
4.
Describe applicable regulations and requirements concerning the containment and pressurizer hatch and how the proposed change will not affect conformance with these requirements.
McGuire Nuclear Station cc:
Ms. Lisa F. Vaughn Duke Energy Corporation Mail Code - PB06E 422 South Church Street P.O. Box 1244 Charlotte, North Carolina 28201-1244 County Manager of Mecklenburg County 720 East Fourth Street Charlotte, North Carolina 28202 Mr. C. Jeffrey Thomas Regulatory Compliance Manager Duke Energy Corporation McGuire Nuclear Site 12700 Hagers Ferry Road Huntersville, North Carolina 28078 Anne Cottingham, Esquire Winston and Strawn 1400 L Street, NW Washington, DC 20005 Senior Resident Inspector c/o U.S. Nuclear Regulatory Commission 12700 Hagers Ferry Road Huntersville, North Carolina 28078 Dr. John M. Barry Mecklenburg County Department of Environmental Protection 700 N. Tryon Street Charlotte, North Carolina 28202 Mr. Peter R. Harden, IV VP-Customer Relations and Sales Westinghouse Electric Company 6000 Fairview Road, 12th Floor Charlotte, North Carolina 28210 Ms. Karen E. Long Assistant Attorney General North Carolina Department of Justice P.O. Box 629 Raleigh, North Carolina 27602 Mr. R.L. Gill, Jr.
Manager - Nuclear Regulatory Issues and Industry Affairs Duke Energy Corporation 526 South Church Street Mail Stop EC05P Charlotte, North Carolina 28202 NCEM REP Program Manager 4713 Mail Service Center Raleigh, North Carolina 27699-4713 Mr. Richard M. Fry, Director Division of Radiation Protection North Carolina Department of Environment, Health and Natural Resources 3825 Barrett Drive Raleigh, North Carolina 27609-7721 Mr. T. Richard Puryear Owners Group (NCEMC)
Duke Energy Corporation 4800 Concord Road York, South Carolina 29745 Henry Barron Group Vice President, Nuclear Generation and Chief Nuclear Officer P.O. Box 1006-EC07H Charlotte, NC 28201-1006