ML051580273
| ML051580273 | |
| Person / Time | |
|---|---|
| Site: | Millstone  |
| Issue date: | 11/12/2003 |
| From: | Lund A NRC/NRR/DE/EMCB |
| To: | Clifford J NRC/NRR/DLPM/LPD2 |
| References | |
| FOIA/PA-2005-0210, TAC MC0631 | |
| Download: ML051580273 (3) | |
Text
November 12, 2003 MEMORANDUM TO:
James W. Clifford, Chief Project Directorate 11-2 Division of Licensing Project Management FROM:
SUBJECT:
A. Louise Lund, Chief IRAI Steam Generator Integrity & Chemical Engineering Section Materials and Chemical Engineering Branch Division of Engineering REQUEST FOR ADDITIONAL INFORMATION REGARDING THE MILLSTONE UNIT 3 STEAM GENERATOR TUBE INSPECTION
SUMMARY
REPORTS FOR THEIR FALL 2002 OUTAGE (TAC NO.: MC0631)
By letters dated October 7, 2002 (ML022910045) and August 25, 2003 (ML032471591),
Dominion Nuclear Connecticut Inc., the licensee, submitted the steam generator tube plugging and inspection summary reports for the Millstone Power Station Unit 3 for their Fall 2002 outage in accordance with the plant's Technical Specifications. The NRC staff participated in a conference call on September 18 and 20, 2002 (ML023110528), with Dominion Nuclear Connecticut, Inc, representatives regarding the ongoing steam generator tube inspection activities at Millstone Power Station, Unit No. 3.
The staff has reviewed the information the licensee provided and determined that additional information is required in order to complete the evaluation. The additional information being requested is attached. Please forward the attached request for additional information to the licensee.
Attachment:
As stated CONTACT:
Yamir Diaz EMCB/DE 301-415-2228 6 Z,
November 12, 2003 MEMORANDUM TO:
James W. Clifford, Chief Project Directorate 11-2 Division of Licensing Project Management FROM:
A. Louise Lund, Chief IRA Steam Generator Integrity & Chemical Engineering Section Materials and Chemical Engineering Branch Division of Engineering
SUBJECT:
REQUEST FOR ADDITIONAL INFORMATION REGARDING THE MILLSTONE UNIT 3 STEAM GENERATOR TUBE INSPECTION
SUMMARY
REPORTS FOR THEIR FALL 2002 OUTAGE (TAC NO.: MC0631)
By letters dated October 7, 2002 (ML022910045) and August 25, 2003 (ML032471591),
Dominion Nuclear Connecticut Inc., the licensee, submitted the steam generator tube plugging and inspection summary reports for the Millstone Power Station Unit 3 for their Fall 2002 outage in accordance with the plant's Technical Specifications. The NRC staff participated in a conference call on September 18 and 20, 2002 (ML023110528), with Dominion Nuclear Connecticut, Inc, representatives regarding the ongoing steam generator tube inspection activities at Millstone Power Station, Unit No. 3.
The staff has reviewed the information the licensee provided and determined that additional information is required in order to complete the evaluation. The additional information being requested is attached. Please forward the attached request for additional information to the licensee.
Attachment:
As stated CONTACT:
Yamir Diaz EMCB/DE 301-415-2228 DISTRIBUTION:
EMCB RF LLund YDiaz MMurphy VNerses G:\\EMCB\\Diaz,Yamir\\Millstone ISI Review\\Millstone 3 RAI.wpd F
OFFICE EMCB:DE I E EMCB:D NAME YDMaz LLund DATE 11/12/03 11/12/03 OFFICIAL RECORD COPY
REQUEST FOR ADDITIONAL INFORMATION FOR DOMINION NUCLEAR CONNECTICUT INC MILLSTONE UNIT 3 STEAM GENERATOR TUBE INSPECTION REPORT FOR THEIR 2002 OUTAGE DOCKET NO. 50-423
- 1. On page two of your inservice inspection report you indicated that the rotating pancake coil (RPC) examinations in Steam Generator (SG) A resulted in 43 volumetric indications. 28 of these indications were determined to be manufacturing burnish marks (MBM) and the remaining 1 5 were considered to be MBM or loose part wear that could not be confirmed with bobbin coil. The last 15 indications were reported as single volumetric indications (SVI) and documented in Attachment 4 of your report. There seems to be a difference between the number of SVls listed in Attachment 4 and the number of SVls discussed in the report. A similar situation occurs for the number of SVls in SG C. Please clarify the differences.
- 2. On page four of your inservice inspection report you indicated that one tube in the C SG was identified with an obstruction. Please describe the nature of the obstruction. Include in your response a discussion of whether the obstruction was service induced and the extent and location of the obstruction (e.g., what was the largest size probe to be passed through the tube during this outage and previous outages).
- 3. On page four of your report you indicate that a SVI was identified and in contact with a non-retrievable loose part. Please discuss the nature of this part and discuss the results of evaluations performed to ensure the part would not damage other adjacent tubes. In addition, please discuss what other loose parts have been left in the SGs and the results of any evaluations performed to ensure these parts would not result in a loss of tube integrity for the period of time between inspections.
ATTACHMENT