ML062130097
| ML062130097 | |
| Person / Time | |
|---|---|
| Site: | Browns Ferry  |
| Issue date: | 08/06/2006 |
| From: | Chernoff M NRC/NRR/ADRO/DORL/LPLII-2 |
| To: | Singer K Tennessee Valley Authority |
| Chernoff M, NRR/DORL, 415-4041 | |
| References | |
| GL-98-004, TAC MC3159 | |
| Download: ML062130097 (5) | |
Text
August 6, 2006 Mr. Karl W. Singer Chief Nuclear Officer and Executive Vice President Tennessee Valley Authority 6A Lookout Place 1101 Market Street Chattanooga, TN 37402-2801
SUBJECT:
BROWNS FERRY NUCLEAR PLANT, UNIT 1 REQUEST FOR ADDITIONAL INFORMATION FOR RESPONSE TO GENERIC LETTER 98-04, POTENTIAL FOR DEGRADATION OF THE EMERGENCY CORE COOLING SYSTEM AND THE CONTAINMENT SPRAY SYSTEM AFTER A LOSS-OF-COOLANT ACCIDENT BECAUSE OF CONSTRUCTION AND PROTECTIVE COATING DEFICIENCIES AND FOREIGN MATERIAL IN CONTAINMENT (TAC NO. MC3159)
Dear Mr. Singer:
By letter dated May 11, 2004, the Tennessee Valley Authority submitted to the U.S. Nuclear Regulatory Commission (NRC) a response to Generic Letter 98-04, Potential for Degradation of the Emergency Core Cooling System and the Containment Spray System after a Loss of Coolant Accident Because of Construction and Protective Coating Deficiencies and Foreign Material in Containment, for Browns Ferry Nuclear Plant, Unit 1.
A response to the enclosed Request for Additional Information (RAI) is needed before the NRC staff can complete the review. This RAI was discussed with Mr. Bill Crouch and others of your staff on August 4, 2006, and it was agreed that a response would be provided within 30 days of receipt of this letter. If you have any questions, please contact me at (301) 415-4041.
Sincerely,
/RA/
Margaret H. Chernoff, Project Manager Plant Licensing Branch II-2 Division of Operating Reactor Licensing Office of Nuclear Reactor Regulation Docket No. 50-259
Enclosure:
Request for Additional Information cc w/enclosure: See next page
ML062130097 NRR-106 OFFICE LPL2-2/PM LPL2-2/LA CSGB/BC LPL2-2/BC NAME MChernoff KGoldstein AHiser by email LRaghavan DATE 8/4/06 8/7/06 8/2/06 8/6/06
SUBJECT:
BROWNS FERRY NUCLEAR PLANT, UNIT 1 REQUEST FOR ADDITIONAL INFORMATION FOR RESPONSE TO GENERIC LETTER 98-04, POTENTIAL FOR DEGRADATION OF THE EMERGENCY CORE COOLING SYSTEM AND THE CONTAINMENT SPRAY SYSTEM AFTER A LOSS-OF-COOLANT ACCIDENT BECAUSE OF CONSTRUCTION AND PROTECTIVE COATING DEFICIENCIES AND FOREIGN MATERIAL IN CONTAINMENT (TAC NO. MC3159)
Dated: August 6, 2006 DISTRIBUTION:
PUBLIC RidsNrrDorlLpl2-2 RidsNrrLACGoldstein RidsNrrPMMChernoff RidsAcrsAcnwMailCenter RidsOgcrp RidsRgn2MailCenter RidsNrrDorl RidsNrrDorlDpr LPL2-2 R/F AHiser MYoder
Enclosure REQUEST FOR ADDITIONAL INFORMATION RESPONSE TO GENERIC LETTER 98-04 TENNESSEE VALLEY AUTHORITY BROWNS FERRY NUCLEAR PLANT, UNIT 1 DOCKET NO. 50-259 1.
Please discuss the scope of the coating inspection performed at the Browns Ferry Nuclear plant (BFN), Unit 1, in response to Generic Letter 98-04. Please discuss the criteria used to determine the inspection scope and how you have accounted for the period of extended shutdown. Please provide the inspection results in sufficient details to enable the NRC staff to make its safety findings. Some of the details should include the types of coating degradation identified, sizes, causes, repairs, etc.
2.
Your response stated that when localized areas of degraded coatings are identified, they are evaluated and subsequently repaired as necessary. Please discuss (1) the criteria used to determine what constitutes localized areas of degraded coatings and the corrective actions that are followed, (2) what corrective actions are taken if the localized criteria is exceeded, (3) identify what major (exceed localized limits) coating work has been or needs to be performed, (4) identify the reason (cause of failure),
extent and coating system chosen for any major coating work and (5) discuss the criteria when repair or replacement would not be necessary, how repairs are scheduled and include prioritization of repair work.
3.
Please discuss how containment coatings are evaluated for acceptability when degraded areas are identified (this is not intended to be a discussion regarding qualification) and how the extent of coating degradation in these areas is determined.
4.
Your response stated that the coating inspection included the exposed components and surfaces inside the primary containment. Please discuss the coating inspection, including scope, periodicity, method of inspection, etc., associated with components that are not exposed, i.e., submerged portions of the torus.
5.
Your response stated that you had a certain limit on the amount of unqualified coating.
Please discuss how degraded or unqualified coatings are assessed for impact on the emergency sump. Please include in the discussion how degraded or unqualified coatings in unexposed areas are addressed when assessing impact on the sump.
6.
Please provide a description of any physical testing (e.g. adhesion) performed at BFN1.
Include the results of any such testing.
Mr. Karl W. Singer BROWNS FERRY NUCLEAR PLANT Tennessee Valley Authority cc:
Mr. Ashok S. Bhatnagar, Senior Vice President Nuclear Operations Tennessee Valley Authority 6A Lookout Place 1101 Market Street Chattanooga, TN 37402-2801 Mr. Larry S. Bryant, Vice President Nuclear Engineering & Technical Services Tennessee Valley Authority 6A Lookout Place 1101 Market Street Chattanooga, TN 37402-2801 Brian OGrady, Site Vice President Browns Ferry Nuclear Plant Tennessee Valley Authority P.O. Box 2000 Decatur, AL 35609 Mr. Robert J. Beecken, Vice President Nuclear Support Tennessee Valley Authority 6A Lookout Place 1101 Market Street Chattanooga, TN 37402-2801 General Counsel Tennessee Valley Authority ET 11A 400 West Summit Hill Drive Knoxville, TN 37902 Mr. John C. Fornicola, Manager Nuclear Assurance and Licensing Tennessee Valley Authority 6A Lookout Place 1101 Market Street Chattanooga, TN 37402-2801 Mr. Bruce Aukland, Plant Manager Browns Ferry Nuclear Plant Tennessee Valley Authority P.O. Box 2000 Decatur, AL 35609 Mr. Masoud Bajestani, Vice President Browns Ferry Unit 1 Restart Browns Ferry Nuclear Plant Tennessee Valley Authority P.O. Box 2000 Decatur, AL 35609 Mr. Robert G. Jones, General Manager Browns Ferry Site Operations Browns Ferry Nuclear Plant Tennessee Valley Authority P.O. Box 2000 Decatur, AL 35609 Mr. Larry S. Mellen Browns Ferry Unit 1 Project Engineer Division of Reactor Projects, Branch 6 U.S. Nuclear Regulatory Commission 61 Forsyth Street, SW.
Suite 23T85 Atlanta, GA 30303-8931 Mr. Glenn W. Morris, Manager Corporate Nuclear Licensing and Industry Affairs Tennessee Valley Authority 4X Blue Ridge 1101 Market Street Chattanooga, TN 37402-2801 Mr. William D. Crouch, Manager Licensing and Industry Affairs Browns Ferry Nuclear Plant Tennessee Valley Authority P.O. Box 2000 Decatur, AL 35609 Senior Resident Inspector U.S. Nuclear Regulatory Commission Browns Ferry Nuclear Plant 10833 Shaw Road Athens, AL 35611-6970 State Health Officer Alabama Dept. of Public Health RSA Tower - Administration Suite 1552 P.O. Box 303017 Montgomery, AL 36130-3017 Chairman Limestone County Commission 310 West Washington Street Athens, AL 35611