ML081610254
| ML081610254 | |
| Person / Time | |
|---|---|
| Site: | Watts Bar  |
| Issue date: | 06/10/2008 |
| From: | Milano P NRC/NRR/ADRO/DORL/WBSPB |
| To: | Bhatnagar A Tennessee Valley Authority |
| Milano P, NRR/DORL , 415-1457 | |
| References | |
| BL-03-002, TAC MD6713 | |
| Download: ML081610254 (3) | |
Text
June 10, 2008 Mr. Ashok S. Bhatnagar Senior Vice President Nuclear Generation Development and Construction 6A Lookout Place 1101 Market Street Chattanooga, TN 37402-2801
SUBJECT:
WATTS BAR NUCLEAR PLANT, UNIT 2 - REQUEST FOR ADDITIONAL INFORMATION REGARDING BULLETIN NO. 2003-02 (TAC NO. MD6713)
Dear Mr. Bhatnagar:
By letter dated September 7, 2007, the Tennessee Valley Authority (TVA) submitted responses to several bulletins (BLs) and generic letters. The Nuclear Regulatory Commission (NRC) staff has reviewed TVAs response to BL 2003-02, Leakage from Reactor Pressure Vessel (RPV)
Lower Head Penetrations and Reactor Coolant Pressure Boundary Integrity.
After reviewing the information provided by TVA, the NRC staff has determined that additional information is required in order to complete the evaluation. The specific information is delineated in the enclosure to this letter.
This request for additional information (RAI) was discussed with representatives of your staff on June 9, 2008. It was agreed that a response would be provided within 45 days from the date of this letter.
If you have questions regarding this request, please contact me at 301-415-1457.
Sincerely,
/RA/
Patrick D. Milano, Senior Project Manager Watts Bar Special Projects Branch Division of Operating Reactor Licensing Office of Nuclear Reactor Regulation Docket No. 50-391
Enclosure:
RAI cc w/encl: See next page
Mr. Ashok S. Bhatnagar Senior Vice President Nuclear Generation Development and Construction 6A Lookout Place 1101 Market Street Chattanooga, TN 37402-2801
SUBJECT:
WATTS BAR NUCLEAR PLANT, UNIT 2 - REQUEST FOR ADDITIONAL INFORMATION REGARDING BULLETIN NO. 2003-02 (TAC NO. MD6713)
Dear Mr. Bhatnagar:
By letter dated September 7, 2007, the Tennessee Valley Authority (TVA) submitted responses to several bulletins (BLs) and generic letters. The Nuclear Regulatory Commission (NRC) staff has reviewed TVAs response to BL 2003-02, Leakage from Reactor Pressure Vessel (RPV)
Lower Head Penetrations and Reactor Coolant Pressure Boundary Integrity.
After reviewing the information provided by TVA, the NRC staff has determined that additional information is required in order to complete the evaluation. The specific information is delineated in the enclosure to this letter.
This request for additional information (RAI) was discussed with representatives of your staff on June 9, 2008. It was agreed that a response would be provided within 45 days from the date of this letter.
If you have questions regarding this request, please contact me at 301-415-1457.
Sincerely,
/RA/
Patrick D. Milano, Senior Project Manager Watts Bar Special Projects Branch Division of Operating Reactor Licensing Office of Nuclear Reactor Regulation Docket No. 50-391
Enclosure:
RAI cc w/encl: See next page DISTRIBUTION:
PUBLIC RidsNrrPMPMilano RidsOgc Rp RidsAcrsAcnw&mMailCenter WBPB R/F RidsNrrDciCvib G. Cheruvenki RidsRgn2MailCenter (R. Haag, RidsNrrDorlLwpb RidsNrrLABClayton RidsNrrPMJWilliams W. Bearden, J. Bartley)
Accession Number: ML081610254 OFFICE WBPB/PM WBPB/LA DCI/CVIB/BC WBPB/BC NAME PMilano BClayton MMitchell memo dated LRaghavan DATE 06 / 10 /08 06 / 10 /08 03 / 05 / 08 06 / 10 / 08 OFFICIAL RECORD COPY
Ashok S. Bhatnagar Tennessee Valley Authority WATTS BAR NUCLEAR PLANT cc:
Mr. Gordon P. Arent New Generation Licensing Manager Tennessee Valley Authority 5A Lookout Place 1101 Market Street Chattanooga, TN 37402-2801 Mr. Masoud Bajestani, Vice President Watts Bar Unit 2 Watts Bar Nuclear Plant Tennessee Valley Authority P.O. Box 2000, EQB 1B Spring City, TN 37381 Senior Resident Inspector Watts Bar Nuclear Plant U.S. Nuclear Regulatory Commission 1260 Nuclear Plant Road Spring City, TN 37381 Mr. Michael K. Brandon, Manager Licensing and Industry Affairs Watts Bar Nuclear Plant Tennessee Valley Authority P.O. Box 2000 Spring City, TN 37381 Mr. William R. Campbell Chief Nuclear Officer and Executive Vice President Tennessee Valley Authority 3R Lookout Place 1101 Market Street Chattanooga, TN 37402-2801 County Executive 375 Church Street Suite 215 Dayton, TN 37321 County Mayor P. O. Box 156 Decatur, TN 37322 Mr. John C. Fornicola, General Manager Nuclear Assurance Tennessee Valley Authority 3R Lookout Place 1101 Market Street Chattanooga, TN 37402-2801 General Counsel Tennessee Valley Authority 6A West Tower 400 West Summit Hill Drive Knoxville, TN 37902 Mr. Michael J. Lorek, Plant Manager Watts Bar Nuclear Plant Tennessee Valley Authority P.O. Box 2000 Spring City, TN 37381 Mr. Lawrence E. Nanney, Director Tennessee Dept. of Environmental Health &
Conservation Division of Radiological Health 3rd Floor, L&C Annex 401 Church Street Nashville, TN 37243-1532 Mr. Larry E. Nicholson, General Manager Performance Improvement Tennessee Valley Authority 4X Blue Ridge 1101 Market Street Chattanooga, TN 37402-2801 Mr. Michael D. Skaggs Site Vice President Watts Bar Nuclear Plant Tennessee Valley Authority P.O. Box 2000 Spring City, TN 37381
Request for Additional Information Watts Bar Nuclear Plant, Unit 2 Response to Generic Letter 2003-02 Pertaining to Reactor Vessel Lower Head Integrity Docket No. 50-391 By letter dated September 7, 2007 (ADAMS Accession No. ML072570676), the Tennessee Valley Authority (TVA) submitted its responses to several bulletins (BL) and generic letters for Watts Bar Nuclear Plant, Unit 2 (WBN-2). The Nuclear Regulatory Commission (NRC) staff has TVAs response to BL 2003-02, Leakage from Reactor Pressure Vessel (RPV) Lower Head Penetrations and Reactor Coolant Pressure Boundary Integrity, which was provided as to the letter. The purpose of the Bulletin was to request information from the industry related to the structural integrity of the reactor pressure vessel lower head penetrations at pressurized-water reactor facilities. In order for the staff to complete its review of the BL response, the following information is needed:
- 1.
Provide the qualification requirements for the inspectors who will perform the VT-2 visual examinations.
- 2.
State whether bare metal visual (BMV) examinations will be conducted on the circumference of all of the 58 RPV lower head penetrations during the first refueling outage at WBN-2.
- 3.
Provide information addressing the type of the corrective action that will be taken if any evidence of general corrosion of the RPV lower head or any discoloration of the alloy 600 penetrations is identified during the BMV examinations.
- 4.
Provide information regarding the type of cleaning that may be required to remove any corrosion products on the RPV lower head or on the alloy 600 penetrations.
- 5.
Provide information regarding the type of examination (i.e., direct or remote visual method using remotely controlled equipment) that will be used to perform the BMV examinations of each RPV lower head penetration.
- 6.
Provide the type of documentation (e.g., written report, video record, photographs) that will be generated to record the BMV examinations of the RPV lower head penetrations.
- 7.
Describe any design or maintenance improvements that TVA has evaluated to improve the performance of future inspections after operation?
Enclosure