ML20246E887
| ML20246E887 | |
| Person / Time | |
|---|---|
| Site: | Millstone  |
| Issue date: | 07/07/1989 |
| From: | Jaffe D Office of Nuclear Reactor Regulation |
| To: | Mroczka E NORTHEAST NUCLEAR ENERGY CO. |
| References | |
| IEB-88-009, IEB-88-9, NUDOCS 8907130034 | |
| Download: ML20246E887 (4) | |
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7 M gy y Docket No. 50-423 DISTRIBUTION Docket-File n BGrimes Mr. Edward J. Mroczka
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Senior Vice President Plant File Nuclear Engineering and Operations SVarga Northeast Nuclear Energy Company BBoger.
P.O. Box 270 SNorris Hartford, Connecticut 06141-0270 DJaffe OGC
Dear Mr. Mroczka:
EJordan
SUBJECT:
DISCUSSIONS WITH NORTHEAST UTILITIES ON THIMBLE TUBE WEAR (BULLETIN 88-09)
The. purpose of this. letter is to confirm conversations with members of your staff concerning our July 25 and 26,1989 visit to Millstone Unit 3 for the purpose of. discussing your Thimble Tube wear program. We understand that appropriate members of your staff will be available to discuss the items -
identified in the enclosed agenda with Mr. Shou-Nien Hou of the NRC and Mr. G. DeGrassi of BNL.
Sincerely,
/V David H. Jaffe, Project Manager Project Directorate I-4 Division of Reactor Projects I/II Office of Nuclear Reactor Regulation
Enclosure:
As stated cc w/ enclosure:
See next page 1
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JUL 9 71989 Docket No. 50-423
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Mr. Edward J., Mroczka Senior Vice President Nuclear Engineering and Operations Ncrtheast Nuclear Energy Company P.O. Box 270 Hartford, Connecticut 06141-0270
Dear Mr. Mroczka:
SUBJECT:
DISCUSSIONS WITH NORTHEAST UTILITIES ON THIMBLE TUBE WEAR (BULLETIN 88-09).
The purpose of this letter is to confirm conversations with members of your staff concerning our July 25 and 26,1989 visit to Millstone Unit 3 for the purpose of discussing your Thimble Tube wear program. We urderstand that appropriate members of your staff will be available to discuss the items identified in the enclosed agenda with Mr. Shou-Nien Hou of the NRC and Mr. G. DeGrassi of BNL.
Sincerely.
David H. J fe, Project Manager Project Directorate I Division of Reactor Projects I/II Office of Nuclear Reactor Regulation
Enclosure:
As stated cc w/ enclosure:
See next page l
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Lm_____.__
Mr. E. J. Mroczka Millstone Nuclear Power Station Northeast Nuclear Energy Company Unit No. 3 cc:
Gerald Garfield Esquire R. M. Kacich, Manager Day, Berry and Howard Generation Facilities Licensing Counselors at Law Northeast Utilities Service Company City Place Post Office Box 270 Hartford, Connecticut 06103-3499 Hartford, Connecticut 06141-0270 W. D. Romberg, Vice President D. O. Nordquist Nuclear Operations Manager of Quality Assurance Northeast Utilities Service Company Northeast Nuclear Energy Company Post Office Box 270 Post Office Box 270 l
Hartford, Connecticut 06141-0270 Hartford, Connecticut 06141-0270 Kevin McCarthy, Director Regional Administrator Radiation Control Unit Region I Department of Environmental Protection U. S. Nuclear Regulatory Commission State Office Building 475 Allendale Road Hartford, Connecticut 06106 King of Prussia, Pennsylvania 19406 Bradford S. Chase, Under Secretary First Selectmen Energy Division Town of Waterford Office of Policy and Management Hall of Records 80 Washington Street 200 Boston Post Road Hartford, Connecticut 06106 Waterford, Connecticut 06385 S. E. Scace, Station Superintendent W. J. Raymond, Resident Inspector Millstone Nuclear Power Station Millstone Nuclear Power Station Northeast Nuclear Energy Company c/o U. S. Nuclear Regulatory Commission Post Office Box 128 Post Office Box 811 Waterford, Connecticut 06385 Niantic, Connecticut 06357 C..H. Clement, Unit Superintendent M, R. Scully, Executive Director Millstone Unit No. 3 Connecticut Municipal Electric Northeast Nuclear Energy Company Energy Cooperative Post Office Box 128 30 Stott Avenue i
Waterford, Connecticut 06385 Norwich, Connecticut 06360 Ms. Jane Spector Michael L. Jones, Manager Federal Energy Regulatory Commission Project Management Department 825 N. Capitol Street, N.E.
Massachusetts Municipal Wholesale Room 8608C Electric Company Washington, D.C.
20426 Post Office Box 426 Ludlow Massachusetts 01056 Burlington Electric Department c 'o P4bert E. Fletcher, Esq.
271 South Union Street Burlington, Vermont 05402
t AGENDA NRC Audit of Bulletin 88-09 Issues at Millstone 3 1.
Audit Discussion Items A. Thimble Tube Inspection Program
- Inspection Method Description including assumptions and uncertainties
- Inspection Frequency and basis
- Wear Acceptance Criteria and basis
- Corrective Actions
- Inspection Results B. Review of Parameters Affecting Tube Wear
- Hardware Design - Thimble tubes, Tube supporting structures internal and external to Reactor
- Flow rates
- Isolation capability
- Operating History C. Licensee Evaluation of Wear
- Evaluation of inspection results/significant findings
- Westinghouse Owners Group findings / recommendations
- Root cause analysis
- Assessment of safety significance D. Long Term Corrective Action Program Status
- Addition of sleeves
- Addition of isolation valves
- Hot cell examination
- Other Long Term Plans II.
Document Review
- Inspection Reports /Results
- Design drawings
- Analyses supporting acceptance criteria and inspection frequency
- Other relevant Licensee or Westinghouse reports III.
Hardware Inspection
- Seal table room inspection (if accessible)
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