ML082810616
| ML082810616 | |
| Person / Time | |
|---|---|
| Site: | Brunswick  |
| Issue date: | 10/22/2008 |
| From: | Farideh Saba Plant Licensing Branch II |
| To: | Waldrep B Carolina Power & Light Co |
| Saba, F E, NRR/DORL/LPL2-2 301-415-1447 | |
| References | |
| TAC MD8185, TAC MD9184 | |
| Download: ML082810616 (3) | |
Text
UNITED STATES NUCLEAR REGULATORY COMMISSION WASHINGTON, D.C. 20555-0001 October 22, 2008 Mr. Benjamin Waldrep, Vice President Brunswick Steam Electric Plant Carolina Power & Light Company Post Office Box 10429 Southport, North Carolina 28461
SUBJECT:
BRUNSWICK STEAM ELECTRIC PLANT, UNITS 1 AND 2 - REQUEST FOR ADDITIONAL INFORMATION REGARDING PROPOSED CHANGE TO TECHNICAL SPECIFICATION 3.6.1.6, SUPPRESSION CHAMBER-TO-DRYWELL VACUUM BREAKERS (TAC NOS. MD9184 and MD9185)
Dear Mr. Waldrep:
By letter dated July 7, 2008, the Carolina Power & Light Company proposed changes to the Technical Specification 3.6.1.6, "Suppression Chamber-to-Drywell Vacuum Breakers," at the Brunswick Steam Electric Plant, Units 1 and 2. The proposed change will remove the requirement to perform a functional test of each vacuum breaker within 12 hours1.388889e-4 days <br />0.00333 hours <br />1.984127e-5 weeks <br />4.566e-6 months <br /> following operation that causes any vacuum breaker to open and instead require that each vacuum breaker is verified closed within 6 hours6.944444e-5 days <br />0.00167 hours <br />9.920635e-6 weeks <br />2.283e-6 months <br /> following an operation that causes any of the vacuum breakers to open. The Nuclear Regulatory Commission (NRC) staff has reviewed the information the licensee provided and determined that additional information is required in order to complete the evaluation. The NRC staff's request for additional information is enclosed.
Please respond to the enclosed questions within 30 days of the date of this letter. Please contact me at 301-415-1447, if you have any questions on this issue.
Sincerely, r,v>'~ e.,)~ ~ c-Farideh E. Saba, Senior Project Manager Plant Licensing Branch 11-2 Division of Operating Reactor Licensing Office of Nuclear Reactor Regulation Docket Nos. 50-325 and 50-324
Enclosure:
As stated cc w/encl: See next page
October 22,2008 Mr. Benjamin Waldrep, Vice President Brunswick Steam Electric Plant Carolina Power & Light Company Post Office Box 10429 Southport, North Carolina 28461
SUBJECT:
BRUNSWICK STEAM ELECTRIC PLANT, UNITS 1 AND 2 - REQUEST FOR ADDITIONAL INFORMATION REGARDING PROPOSED CHANGE TO TECHNICAL SPECIFICATION 3.6.1.6, SUPPRESSION CHAMBER-TO-DRYWELL VACUUM BREAKERS (TAC I\\IOS. MD9184 and MD9185)
Dear Mr. Waldrep:
By letter dated July 7,2008, the Carolina Power & Light Company proposed changes to the Technical Specification 3.6.1.6, "Suppression Chamber-to-Drywell Vacuum Breakers," at the Brunswick Steam Electric Plant, Units 1 and 2. The proposed change will remove the requirement to perform a functional test of each vacuum breaker within 12 hours1.388889e-4 days <br />0.00333 hours <br />1.984127e-5 weeks <br />4.566e-6 months <br /> following operation that causes any vacuum breaker to open and instead require that each vacuum breaker is verified closed within 6 hours6.944444e-5 days <br />0.00167 hours <br />9.920635e-6 weeks <br />2.283e-6 months <br /> following an operation that causes any of the vacuum breakers to open. The Nuclear Regulatory Commission (NRC) staff has reviewed the information the licensee provided and determined that additional information is required in order to complete the evaluation. The NRC staff's request for additional information is enclosed.
Please respond to the enclosed questions within 30 days of the date of this letter. Please contact me at 301-415-1447, if you have any questions on this issue.
Sincerely, IRA!
Farideh E. Saba, Senior Project lVIanager Plant Licensing Branch 11-2 Division of Operating Reactor Licensing Office of l\\Iuclear Reactor Regulation Docket Nos. 50-325 and 50-324
Enclosure:
As stated cc w/encl: See next page Distribution:
PUBLIC LPL2-2 R/F RidsNrrDorlLpl2-2 RidsNrrPMFSaba RidsOgcRp RidsNrrLACSola (Hard Copy)
RidsAcrsAcnw_lVIailCTR RidsRgn2MailCenter RidsN rrDorlDpr RidsNrrDssScvb Richard Lobel, NRR John Huang, t\\lRR ADAMS ACCESSION: ML082810616 NRR-088 IOFFICE LPL2-2/PM LPL2-2/LA ISCVB/BC*
LPL2-2/BC NAME FSaba CSoia RDennig TBoyce DATE 10/21/08 10/20/08 09/22/08 10/22/08
- by Memorandum OFFICIAL RECORD
Carolina Power & Light Company Brunswick Steam Electric Plant, Units 1 and 2 cc:
Mr. Robert P. Gruber Executive Director Public Staff NCUC 4326 Mail Service Center Raleigh, North Carolina 27699-4326 Ms. Margaret A. Force Assistant Attorney General State of North Carolina Post Office Box 629 Raleigh, North Carolina 27602 Sandra Spencer, Mayor City of Southport 201 East Moore Street Southport, North Carolina 28461 Additional Distribution via ListServ
REQUEST FOR ADDITIONAL INFORMATION REGARDING BRUNSWICK STEAM ELECTRIC PLANT, UNITS 1 AND 2 PROPOSED CHANGE TO THE TECHNICAL SPECIFICATION 3.6.1.6 SUPPRESSION CHAMBER-TO-DRYWELL VACUUM BREAKERS (MD9184/MD9185)
- 1. Please explain why venting the suppression chamber for "extended periods," prior to venting the drywell, has not been effective in limiting opening of the suppression chamber to drywell vacuum breakers (VBs). Are changes possible to this procedure that could eliminate vacuum breaker opening?
- 2. Is it possible to limit the opening of the drywell vent valves so that the drywell is vented more slowly?
- 3. Is it possible to increase the differential pressure setting of the VB magnetic latches?
- 4. To your knowledge, is this a problem at other boiling water reactors? If not, please explain why this is specific to Brunswick Steam Electric Plant (BSEP)?
- 5. Provide the operational history of the VBs at BSEP. For example, how long the VBs have been in service, and how many times the VBs had been opened and tested.
- 6. Provide the test history (including insevice testings and setpoint tests) of the VBs, and if any failures, discuss the causes of failures and failure mechanisms.
Enclosure