ML032521448
| ML032521448 | |
| Person / Time | |
|---|---|
| Site: | Boiling Water Reactor Owners Group |
| Issue date: | 09/08/2003 |
| From: | Wang A NRC/NRR/DLPM/LPD4 |
| To: | Stephen Dembek NRC/NRR/DLPM/LPD4 |
| Wang A, NRR/DLPM, 415-1445 | |
| Shared Package | |
| ML | List: |
| References | |
| Download: ML032521448 (5) | |
Text
September 8, 2003 MEMORANDUM TO: Stephen Dembek, Chief, Section 2 Project Directorate IV Division of Licensing Project Management Office of Nuclear Reactor Regulation FROM:
Alan B. Wang, Project Manager, Section 2
/RA/
Project Directorate IV Division of Licensing Project Management Office of Nuclear Reactor Regulation
SUBJECT:
SUMMARY
OF MEETING WITH THE BOILING WATER REACTOR OWNERS GROUP (BWROG) REGARDING OPTION 3, LOSS-OF-COOLANT ACCIDENT/LOSS-OF-OFFSITE POWER RISK-INFORMED IMPLEMENTATION On July 24, 2003, an open meeting was held between the BWROG and the NRC staff to discuss the BWROG efforts to separate the loss-of-offsite power (LOOP) from loss-of-coolant accidents (LOCA) based on a risk-informed approach. The BWROG reiterated the logic and advantages that separating LOCA-LOOP could provide. The BWROG presentation dealt mostly with the thermal-hydraulic analyses needed in support of Option 3.
The BWROG stated analyses were needed to demonstrate success for: (1) smaller breaks, (2) large break loss-of-coolant-accidents (LBLOCA), and (3) defense-in-depth for LBLOCA with offsite power unavailable. The staff expressed concern with how the BWROG would demonstrate defense-in-depth. The BWROG noted that they expect most plants will need to revise their licensing basis calculations unless existing calculations are determined to be bounding. Exemptions will be needed. GE Nuclear Energy (GENE) will be benchmarking the MAAP code to simulate TRACG and SAFER results. MAAP will then be used for identifying the limiting cases for detailed studies. TRACG would be used to confirm the limiting cases. The use of MAAP for the preliminary work will save on time and resources. Early test cases between MAAP and TRACG have compared well. The staff felt the proposal was reasonable.
The BWROG plans to have a followup meeting in September at which time they hope to have a strawman proposal on how to implement the 10 CFR 50.46 rulemaking.
The BWROG asked the staff if we had considered further if the GENE generic probabilistic risk assessment model would be a good pilot for the DG-1122 submittal and if it did, could it qualify for a waiver. The staff did not feel it would be. Mr. Hill noted that he had indications from the last meeting that there were members of the staff that thought otherwise. The staff agreed to research this issue further prior to the next meeting.
S. Dembek The staff thanked the BWROG for the presentation and encouraged an update on developments in the next several months. The staff expressed that this would be an ambitious undertaking. This meeting was informational. No regulatory decisions were made. The BWROG was encouraged by the staffs suggestions and proposed to meet in 4 to 6 weeks.
The meeting handout can be found in ADAMS under Accession No. ML032380424. The attendance list is attached.
Project No. 691
Attachment:
Meeting Attendees cc w/att: See next page
ML032521448 NRC-001 OFFICE PDIV-2/PM PDIV-2/LA PDIV-2/SC NAME AWang EPeyton SDembek DATE 9/4/03 9/3/03 9/4/03 DOCUMENT NAME: C:\\ORPCheckout\\FileNET\\ML032521448.wpd
MEETING WITH THE BOILING WATER REACTORS OWNERS GROUP DEVELOPMENT OF A NEW REACTOR CORE STABILITY LIMIT JULY 24, 2003 GE NUCLEAR ENERGY R. Hill R. Wachowiak OTHER T. Browning (NMC - Duane Arnold)
J. Gaertner (EPRI)
NRC A. Wang E. McKenna S. Dinsmore M. Rubin P. Wen S. Bajorek R. Landry M. Tschiltz S. Lu M. Kowal A. Buslik J. Lane
BWR Owners Group Project No. 691 cc:
Mr. Joseph E. Conen Vice Chairman, BWR Owners Group DTE Energy - Fermi 2 200 TAC 6400 N. Dixie Highway Newport, MI 48166 Mr. J. A. Gray, Jr.
Regulatory Response Group Chairman BWR Owners Group Entergy Nuclear Northeast 440 Hamilton Avenue Mail Stop 12C White Plains, NY 10601-5029 Mr. H. Lewis Sumner Southern Nuclear Company 40 Inverness Center Parkway P.O. Box 1295 Birmingham, AL 35242 Mr. Carl D. Terry Vice President, Nuclear Engineering Nine Mile Point - Station OPS Building/2nd Floor P.O. Box 63 Lycoming, NY 13093 Mr. Thomas G. Hurst GE Nuclear Energy M/C 782 175 Curtner Avenue San Jose, CA 95125 Mr. Thomas A. Green GE Nuclear Energy M/C 782 175 Curtner Avenue San Jose, CA 95125 Mr. James Meister Exelon Cornerstone II at Cantera 4300 Winfield Road Warrenville, IL 60555 Mr. William A. Eaton ENTERGY Grand Gulf Nuclear Station P.O. Box 756 Port Gibson, MS 39150 Mr. Mark Reddeman Vice President Engineering Point Beach Nuclear Plant 6610 Nuclear Road Two Rivers, WI 54241 Mr. Richard Libra DTE Energy Fermi 2 M/C 280 OBA 6400 North Dixie Highway Newport, MI 48166 Mr. James F. Klapproth GE Nuclear Energy M/C 706 175 Curtner Avenue San Jose, CA 95125 Mr. Kenneth Putnam, Chairman BWR Owners Group Nuclear Management Company Duane Arnold Energy Center 3277 DAEC Road Palo, IA 52324